# 128Gb ram, 2x4-core. small-config:1189s large-config:3065s
#host = amdr905-1.eecs.berkeley.edu
-remote_ise = /tools/xilinx/ISE9.1i_lin
-remote_edk = /tools/xilinx/EDK9.1i
+remote_ise = /tools/xilinx/10.1/ISE
+remote_edk = /tools/xilinx/10.1/EDK
+
+#remote_ise = /tools/xilinx/ISE9.1i_lin
+#remote_edk = /tools/xilinx/EDK9.1i
+
#remote_dir = /scratch/megacz/fleet/
#remote_dir = /vol/hitz/home/megacz/fleet/
remote_dir = /tmp/megacz/fleet/
xilinx = cd build/fpga;
xilinx += LD_LIBRARY_PATH=$$LD_LIBRARY_PATH:$(remote_ise)/bin/lin:$(remote_edk)/bin/lin
xilinx += PATH=$$PATH:$(remote_ise)/bin/lin:$(remote_edk)/bin/lin
-xilinx += XST_VERSION=9.2i
+#xilinx += XST_VERSION=9.2i
xilinx += XILINX=$(remote_ise)
xilinx += XIL_XST_HIDEMESSAGES=hdl_and_low_levels
xilinx += XILINX_EDK=$(remote_edk)
xilinx_ise = $(xilinx) $(remote_ise)/bin/lin/
xilinx_edk = $(xilinx) $(remote_edk)/bin/lin/
-speed_grade = 11
-device = xc4vfx60ff1152-${speed_grade}
-#device = xc2vp70-7ff1704
+# ML50X
+speed_grade = 1
+part = xc5vlx110t
+package = ff1136
+board = ml505 # ??
+
+# ML410
+#part = xc4vfx60
+#package = ff1152
+#speed_grade = 11
+#board = ml410
+
+# BEE2
+#part = xc2vp70
+#package = 7ff1704
+
+device = ${part}${package}-${speed_grade}
upload: fleet.jar build/fpga/main.bit
mkdir -p build
scp ${host}:${remote_dir}/build/fpga/main.bit build/fpga/
pcore = ${remote_edk}/hw/XilinxProcessorIPLib/pcores
+#effort = std
+effort = high
synth:
cd build/fpga; ln -sf ../../src/edu/berkeley/fleet/fpga/* .
cd build/fpga; ln -sf ../../src/edu/berkeley/fleet/fpga/mem/* .
+ cd build/fpga; ln -sf ../../src/edu/berkeley/fleet/fpga/greg/* .
rm -f build/fpga/main.lso
echo work >> build/fpga/main.lso
rm -f build/fpga/main.prj
echo '-g Security:NONE' >> build/fpga/main.ut
echo '-g Persist:No' >> build/fpga/main.ut
- $(xilinx_ise)xst -intstyle xflow -ifn main.xst -ofn main.syr < main.xst
- $(xilinx_ise)ngdbuild -aul -intstyle xflow -dd _ngo -nt timestamp -uc main.ucf -p $(device) main.ngc main.ngd
- $(xilinx_ise)map -cm area -intstyle xflow -p $(device) -pr b -ol high -o main_map.ncd main.ngd main.pcf
- $(xilinx_ise)par -w -intstyle xflow -t 99 -pl high -rl high main_map.ncd main.ncd main.pcf
- $(xilinx_ise)bitgen -intstyle xflow -f main.ut main.ncd
-# $(xilinx_ise)trce -intstyle xflow -e 3 -l 3 -s ${speed_grade} -xml main main.ncd -o main.twr main.pcf
- $(xilinx_edk)xmd -tcl $(remote_edk)/data/xmd/genace.tcl -jprog -hw main.bit -board ml410 -ace mainx.ace
- mv build/fpga/mainx.ace build/fpga/main.ace # genace throws a fit if the filename prefix is the same?
+ $(xilinx_ise)xst -intstyle xflow -ifn main.xst -ofn main.syr < main.xst
+ $(xilinx_ise)ngdbuild -intstyle xflow -aul -dd _ngo -nt timestamp -uc main.ucf -p $(device) main.ngc main.ngd
+ $(xilinx_ise)map -intstyle xflow -ol ${effort} -p $(device) -pr b -cm area -o main_map.ncd main.ngd main.pcf
+ $(xilinx_ise)par -intstyle xflow -ol ${effort} -w main_map.ncd main.ncd main.pcf
+ $(xilinx_ise)bitgen -intstyle xflow -f main.ut main.ncd
+# $(xilinx_ise)trce -intstyle xflow -e 3 -l 3 -s ${speed_grade} -xml main main.ncd -o main.twr main.pcf
+# $(xilinx_edk)xmd -tcl $(remote_edk)/data/xmd/genace.tcl -jprog -hw main.bit -board ${board} -ace mainx.ace
+# mv build/fpga/mainx.ace build/fpga/main.ace # genace throws a fit if the filename prefix is the same?
runserver: fleet.jar
sudo ln -sf $XILINX/bin/lin/xusbdfwu.hex /usr/share/xusbdfwu.hex
+# ml410: use -p 2
+# ml505: use -p 5
+
$XILINX/bin/lin/impact -batch <<EOF
cleancablelock
setMode -bs
setCable -port usb21 -baud 12000000
identify
setMode -bs
-assignFile -p 2 -file $BITFILE
-program -p 2
+assignFile -p 5 -file $BITFILE
+program -p 5
quit
EOF
--- /dev/null
+ship: DDR2
+
+== Ports ===========================================================
+data in: inAddrRead
+data in: inAddrWrite
+data in: inDataWrite
+
+data out: out
+
+percolate up: DDR2_CAS_B 1
+percolate up: DDR2_CKE 2
+percolate up: DDR2_RAS_B 1
+percolate up: DDR2_WE_B 1
+percolate up: DDR2_ODT 2
+percolate up: DDR2_CS0_B 2
+percolate up: DDR2_CLK_N 2
+percolate up: DDR2_CLK_P 2
+percolate up: DDR2_A 14
+percolate up: DDR2_BA 3
+percolate inout: DDR2_DQ 64
+percolate up: DDR2_DM 8
+percolate inout: DDR2_DQS_N 8
+percolate inout: DDR2_DQS_P 8
+
+percolate inout: I2C_DDR2_SCL 1
+percolate inout: I2C_DDR2_SDA 1
+
+percolate down: CLKBUF_Q1_N 1
+percolate down: CLKBUF_Q1_P 1
+
+== TeX ==============================================================
+
+== Fleeterpreter ====================================================
+ public void service() { }
+== FleetSim ==============================================================
+
+== FPGA ==============================================================
+
+// Nearly all of this was copied from Greg Gibeling's work; copyright shown below:
+
+// Everything here was copied from
+// GateLib/Firmware/DRAM/Hardware/DDR2SDRAM/Test/FPGA_TOP_ML505_DDR2SDRAMTest.v
+
+//==============================================================================
+// Section: License
+//==============================================================================
+// Copyright (c) 2005-2008, Regents of the University of California
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without modification,
+// are permitted provided that the following conditions are met:
+//
+// - Redistributions of source code must retain the above copyright notice,
+// this list of conditions and the following disclaimer.
+// - Redistributions in binary form must reproduce the above copyright
+// notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+// - Neither the name of the University of California, Berkeley nor the
+// names of its contributors may be used to endorse or promote
+// products derived from this software without specific prior
+// written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
+// ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+// ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+//==============================================================================
+
+parameter
+ ClockFreq = 200000000,
+ BAWidth = 2,
+ RAWidth = 13,
+ CAWidth = 10,
+ DWidth = 128, // 128b SDR internal transfers
+ UWidth = 8, // This will almost ALWAYS be 8
+ BurstLen = 2, // 256b total burst, 2 words DWidth words at SDR, or 4 external words at DDR
+ EnableMask = 1,
+ EnableECC = 0,
+ Board = 0;
+
+localparam
+ UCount = DWidth / UWidth,
+ // 128b/8 = 16b per mask means per-byte masking
+ MWidth = (EnableECC || (EnableMask == 0)) ? 0 : UCount,
+ // Unused lower address bits, the -1 is to get a proper log2
+ UAWidth = `log2(UCount-1),
+ TAWidth = CAWidth + RAWidth + BAWidth,
+ // Note that the components are in order according to where in the
+ // address they appear, the -1 is to account for DDR
+ AWidth = TAWidth + UAWidth - 1,
+ ECheck = EnableECC ? 2 : 0,
+ ECorrect = EnableECC ? 1 : 0,
+ CWidth = 3,
+ EHWidth = `max(`log2(ECheck), 1),
+ ERWidth = `max(`log2(ECheck), 1);
+
+wire Reset;
+assign Reset = !rst;
+
+reg [AWidth-1:0] CommandAddress;
+reg [CWidth-1:0] Command;
+wire CommandReady;
+reg CommandValid;
+
+wire [DWidth-1:0] DataIn;
+wire [MWidth-1:0] DataInMask;
+reg DataInValid;
+wire DataInReady;
+
+wire [DWidth-1:0] DataOut;
+wire [EHWidth-1:0] DataOutErrorChecked;
+wire [ERWidth-1:0] DataOutErrorCorrected;
+wire DataOutValid;
+reg DataOutReady;
+
+wire Clock_IBUFG;
+wire Clock, ClockD2, ClockP90;
+wire Clock_DCM, ClockD2_DCM, ClockP90_DCM;
+wire Locked;
+
+reg [`WORDWIDTH:0] out_d;
+assign out_d_ = out_d;
+
+assign DDR2_BA[2] = 1'b0;
+assign DDR2_CS0_B[1] = 1'b1;
+assign DDR2_ODT[1] = 1'b0;
+assign DDR2_CKE[1] = 1'b0;
+
+IBUFGDS ClockIBufG(.I(CLKBUF_Q1_P), .IB(CLKBUF_Q1_N), .O(Clock_IBUFG));
+DCM_BASE
+ #(
+ .CLKIN_PERIOD(5.0),
+ .CLKDV_DIVIDE(2.0),
+ .DLL_FREQUENCY_MODE("HIGH"),
+ .DUTY_CYCLE_CORRECTION("TRUE"),
+ .FACTORY_JF(16'hF0F0)
+ )
+ DCMBase(
+ .CLK0(Clock_DCM),
+ .CLK180( ),
+ .CLK270( ),
+ .CLK2X( ),
+ .CLK2X180( ),
+ .CLK90(ClockP90_DCM),
+ .CLKDV(ClockD2_DCM),
+ .CLKFX( ),
+ .CLKFX180( ),
+ .LOCKED(Locked),
+ .CLKFB(Clock),
+ .CLKIN(Clock_IBUFG),
+ .RST(Reset));
+ // synthesis attribute CLKIN_PERIOD of DCMBase is "5.0"
+ // synthesis attribute CLKDV_DIVIDE of DCMBase is "2.0"
+ // synthesis attribute DLL_FREQUENCY_MODE of DCMBase is "HIGH"
+ // synthesis attribute DUTY_CYCLE_CORRECTION of DCMBase is "TRUE"
+ // synthesis attribute FACTORY_JF of DCMBase is "16'hF0F0"
+ BUFG ClockBufG(.I(Clock_DCM), .O(Clock));
+ BUFG ClockP90BufG(.I(ClockP90_DCM), .O(ClockP90));
+ BUFG ClockD2BufG(.I(ClockD2_DCM), .O(ClockD2));
+
+DDR2SDRAM DDR2SDRAM(
+ .Clock(Clock),
+ .ClockD2(ClockD2),
+ .ClockP90(ClockP90),
+ .Reset(Reset),
+ .Locked(Locked),
+ .ClockF200(Clock),
+ .Initialized( ),
+ .PoweredUp( ),
+
+ .CommandClock(clk),
+ .DataInClock(clk),
+ .DataOutClock(clk),
+ .CommandReset(Reset),
+ .DataInReset(Reset),
+ .DataOutReset(Reset),
+
+ .CommandAddress(CommandAddress),
+ .Command(Command),
+ .CommandValid(CommandValid),
+ .CommandReady(CommandReady),
+ .DataIn(DataIn),
+ .DataInMask(DataInMask),
+ .DataInValid(DataInValid),
+ .DataInReady(DataInReady),
+ .DataOut(DataOut),
+ .DataOutErrorChecked(DataOutErrorChecked),
+ .DataOutErrorCorrected(DataOutErrorCorrected),
+ .DataOutValid(DataOutValid),
+ .DataOutReady(DataOutReady),
+ .DDR2_DQ(DDR2_DQ),
+ .DDR2_A(DDR2_A),
+ .DDR2_BA(DDR2_BA[1:0]),
+ .DDR2_RAS_B(DDR2_RAS_B),
+ .DDR2_CAS_B(DDR2_CAS_B),
+ .DDR2_WE_B(DDR2_WE_B),
+ .DDR2_CS0_B(DDR2_CS0_B[0]),
+ .DDR2_ODT(DDR2_ODT[0]),
+ .DDR2_CKE(DDR2_CKE[0]),
+ .DDR2_DM(DDR2_DM),
+ .DDR2_DQS_P(DDR2_DQS_P),
+ .DDR2_DQS_N(DDR2_DQS_N),
+ .DDR2_CLK_P(DDR2_CLK_P),
+ .DDR2_CLK_N(DDR2_CLK_N));
+ defparam DDR2SDRAM.UWidth = UWidth;
+ defparam DDR2SDRAM.BAWidth = BAWidth;
+ defparam DDR2SDRAM.RAWidth = RAWidth;
+ defparam DDR2SDRAM.CAWidth = CAWidth;
+ defparam DDR2SDRAM.DWidth = DWidth;
+ defparam DDR2SDRAM.BurstLen = BurstLen;
+ defparam DDR2SDRAM.EnableMask = EnableMask;
+ defparam DDR2SDRAM.EnableECC = EnableECC;
+ defparam DDR2SDRAM.Board = Board;
+ defparam DDR2SDRAM.MultiClock = 1;
+
+ assign DataIn = inDataWrite_d;
+ assign DataInMask = 16'b1111111111111111;
+
+ always @(posedge clk) begin
+
+ if (!rst) begin
+ `reset
+ CommandValid <= 0;
+ DataOutReady <= 0;
+ end else begin
+ `flush
+ `cleanup
+
+ CommandValid <= 0;
+ DataInValid <= 0;
+
+ if (`out_empty) begin
+ DataOutReady <= 1;
+ end
+
+ if (DataOutReady && DataOutValid && `out_empty) begin
+ out_d <= { 1'b0, DataOut[`WORDWIDTH-1:0] };
+ `fill_out
+ DataOutReady <= 0;
+
+ end else if (DataOutReady && CommandReady && DataInReady && `out_empty) begin
+ if (`inAddrWrite_full && `inDataWrite_full) begin
+ `drain_inDataWrite
+ `drain_inAddrWrite
+ CommandAddress <= inAddrWrite_d;
+ Command <= 3'b000;
+ CommandValid <= 1;
+ DataInValid <= 1;
+ out_d <= { 1'b1, 37'b0 };
+ `fill_out
+ DataOutReady <= 0;
+ end else if (`inAddrRead_full) begin
+ `drain_inAddrRead
+ CommandAddress <= inAddrRead_d;
+ CommandValid <= 1;
+ Command <= 3'b001;
+ DataInValid <= 0;
+ DataOutReady <= 1;
+ end
+ end
+ end
+ end
+
+== Test ==============================================================
+
+#expect 0
+
+#ship debug : Debug
+#ship ddr : DDR2
+
+debug.in:
+ recv, deliver;
+
+ddr.out:
+ collect;
+ set flags a=!c,b=b;
+ send to debug.in;
+ collect;
+ set flags a=!c,b=b;
+ send to debug.in;
+ddr.inAddrWrite:
+ set word=0;
+ deliver;
+ deliver;
+ddr.inDataWrite:
+ set word=1;
+ deliver;
+ deliver;
+
+
+
+
+== Constants ========================================================
+
+== Contributors =========================================================
+Adam Megacz <megacz@cs.berkeley.edu>
assign uart_cts = 0;
assign rst_out = rst_in && !break;
- sasc_brg sasc_brg(clk, rst_in, 3, 65, sio_ce, sio_ce_x4);
+ // fst=3 means clock divider is 3+2=5 for a 50Mhz clock => 10Mhz
+ // using a 33Mhz clock,
+ // 33.333Mhz / 38400hz * 4 = 217.013 => 215+2,1
+ sasc_brg sasc_brg(clk, rst_in, 215, 1, sio_ce, sio_ce_x4);
sasc_top sasc_top(clk, rst_in,
uart_in,
uart_out,
--- /dev/null
+//==============================================================================
+// File: $URL: svn+ssh://repositorypub@repository.eecs.berkeley.edu/public/Projects/GateLib/branches/dev/GateLibCore/Hardware/Library/Const.v $
+// Version: $Revision: 16355 $
+// Author: Greg Gibeling (http://gdgib.gotdns.com/~gdgib/)
+// Copyright: Copyright 2003-2008 UC Berkeley
+//==============================================================================
+
+//==============================================================================
+// Section: License
+//==============================================================================
+// Copyright (c) 2005-2008, Regents of the University of California
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without modification,
+// are permitted provided that the following conditions are met:
+//
+// - Redistributions of source code must retain the above copyright notice,
+// this list of conditions and the following disclaimer.
+// - Redistributions in binary form must reproduce the above copyright
+// notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+// - Neither the name of the University of California, Berkeley nor the
+// names of its contributors may be used to endorse or promote
+// products derived from this software without specific prior
+// written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
+// ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+// ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+//==============================================================================
+
+//------------------------------------------------------------------------------
+// Section: Simulation Flag
+// Desc: This little nebulous block will define the flags:
+// -SIMULATION Simulating
+// -MODELSIM Simulating using ModelSim
+// -XST Synthesizing with XST
+// -SYNPLIFY Synthesizing with Synplify
+// -SYNTHESIS Synthesizing
+// -MACROSAFE Safe to use macros (Synplify or ModelSim)
+//
+// YOU SHOULD DEFINE THE "MODELSIM" FLAG FOR SIMULATION!!!!
+//------------------------------------------------------------------------------
+`ifdef synthesis // if Synplify
+ `define SYNPLIFY
+ `define SYNTHESIS
+ `define MACROSAFE
+`else // if not Synplify
+ `ifdef MODELSIM
+ `define SIMULATION
+ `define MACROSAFE
+ `else
+ `define XST
+ // synthesis translate_off // if XST then stop compiling
+ `undef XST
+ `define SIMULATION
+ `define MODELSIM
+ // synthesis translate_on // if XST then resume compiling
+ `ifdef XST
+ `define SYNTHESIS
+ `define MACROSAFE
+ `endif
+ `endif
+`endif
+//------------------------------------------------------------------------------
+
+//------------------------------------------------------------------------------
+// Section: Log2 Macro
+// Desc: A macro to take the log base 2 of any number. Useful for
+// calculating bitwidths. Warning, this actually calculates
+// log2(x-1), not log2(x).
+//------------------------------------------------------------------------------
+`ifdef MACROSAFE
+`define log2(x) ((((x) > 1) ? 1 : 0) + \
+ (((x) > 2) ? 1 : 0) + \
+ (((x) > 4) ? 1 : 0) + \
+ (((x) > 8) ? 1 : 0) + \
+ (((x) > 16) ? 1 : 0) + \
+ (((x) > 32) ? 1 : 0) + \
+ (((x) > 64) ? 1 : 0) + \
+ (((x) > 128) ? 1 : 0) + \
+ (((x) > 256) ? 1 : 0) + \
+ (((x) > 512) ? 1 : 0) + \
+ (((x) > 1024) ? 1 : 0) + \
+ (((x) > 2048) ? 1 : 0) + \
+ (((x) > 4096) ? 1 : 0) + \
+ (((x) > 8192) ? 1 : 0) + \
+ (((x) > 16384) ? 1 : 0) + \
+ (((x) > 32768) ? 1 : 0) + \
+ (((x) > 65536) ? 1 : 0) + \
+ (((x) > 131072) ? 1 : 0) + \
+ (((x) > 262144) ? 1 : 0) + \
+ (((x) > 524288) ? 1 : 0) + \
+ (((x) > 1048576) ? 1 : 0) + \
+ (((x) > 2097152) ? 1 : 0) + \
+ (((x) > 4194304) ? 1 : 0) + \
+ (((x) > 8388608) ? 1 : 0) + \
+ (((x) > 16777216) ? 1 : 0) + \
+ (((x) > 33554432) ? 1 : 0) + \
+ (((x) > 67108864) ? 1 : 0) + \
+ (((x) > 134217728) ? 1 : 0) + \
+ (((x) > 268435456) ? 1 : 0) + \
+ (((x) > 536870912) ? 1 : 0) + \
+ (((x) > 1073741824) ? 1 : 0))
+`endif
+//------------------------------------------------------------------------------
+
+//------------------------------------------------------------------------------
+// Section: Log2 Floor Macro
+// Desc: A macro to take the floor of the log base 2 of any number.
+//------------------------------------------------------------------------------
+`ifdef MACROSAFE
+`define log2f(x) ((((x) >= 2) ? 1 : 0) + \
+ (((x) >= 4) ? 1 : 0) + \
+ (((x) >= 8) ? 1 : 0) + \
+ (((x) >= 16) ? 1 : 0) + \
+ (((x) >= 32) ? 1 : 0) + \
+ (((x) >= 64) ? 1 : 0) + \
+ (((x) >= 128) ? 1 : 0) + \
+ (((x) >= 256) ? 1 : 0) + \
+ (((x) >= 512) ? 1 : 0) + \
+ (((x) >= 1024) ? 1 : 0) + \
+ (((x) >= 2048) ? 1 : 0) + \
+ (((x) >= 4096) ? 1 : 0) + \
+ (((x) >= 8192) ? 1 : 0) + \
+ (((x) >= 16384) ? 1 : 0) + \
+ (((x) >= 32768) ? 1 : 0) + \
+ (((x) >= 65536) ? 1 : 0) + \
+ (((x) >= 131072) ? 1 : 0) + \
+ (((x) >= 262144) ? 1 : 0) + \
+ (((x) >= 524288) ? 1 : 0) + \
+ (((x) >= 1048576) ? 1 : 0) + \
+ (((x) >= 2097152) ? 1 : 0) + \
+ (((x) >= 4194304) ? 1 : 0) + \
+ (((x) >= 8388608) ? 1 : 0) + \
+ (((x) >= 16777216) ? 1 : 0) + \
+ (((x) >= 33554432) ? 1 : 0) + \
+ (((x) >= 67108864) ? 1 : 0) + \
+ (((x) >= 134217728) ? 1 : 0) + \
+ (((x) >= 268435456) ? 1 : 0) + \
+ (((x) >= 536870912) ? 1 : 0) + \
+ (((x) >= 1073741824) ? 1 : 0))
+`endif
+//------------------------------------------------------------------------------
+
+//------------------------------------------------------------------------------
+// Section: Pow2 Macro
+// Desc: A macro to take the 2 to the power of any number. Useful for
+// calculating bitwidths.
+//------------------------------------------------------------------------------
+`ifdef MACROSAFE
+`define pow2(x) ((((x) >= 1) ? 2 : 1) * \
+ (((x) >= 2) ? 2 : 1) * \
+ (((x) >= 3) ? 2 : 1) * \
+ (((x) >= 4) ? 2 : 1) * \
+ (((x) >= 5) ? 2 : 1) * \
+ (((x) >= 6) ? 2 : 1) * \
+ (((x) >= 7) ? 2 : 1) * \
+ (((x) >= 8) ? 2 : 1) * \
+ (((x) >= 9) ? 2 : 1) * \
+ (((x) >= 10) ? 2 : 1) * \
+ (((x) >= 11) ? 2 : 1) * \
+ (((x) >= 12) ? 2 : 1) * \
+ (((x) >= 13) ? 2 : 1) * \
+ (((x) >= 14) ? 2 : 1) * \
+ (((x) >= 15) ? 2 : 1) * \
+ (((x) >= 16) ? 2 : 1) * \
+ (((x) >= 17) ? 2 : 1) * \
+ (((x) >= 18) ? 2 : 1) * \
+ (((x) >= 19) ? 2 : 1) * \
+ (((x) >= 20) ? 2 : 1) * \
+ (((x) >= 21) ? 2 : 1) * \
+ (((x) >= 22) ? 2 : 1) * \
+ (((x) >= 23) ? 2 : 1) * \
+ (((x) >= 24) ? 2 : 1) * \
+ (((x) >= 25) ? 2 : 1) * \
+ (((x) >= 26) ? 2 : 1) * \
+ (((x) >= 27) ? 2 : 1) * \
+ (((x) >= 28) ? 2 : 1) * \
+ (((x) >= 29) ? 2 : 1) * \
+ (((x) >= 30) ? 2 : 1) * \
+ (((x) >= 31) ? 2 : 1))
+`endif
+//------------------------------------------------------------------------------
+
+//------------------------------------------------------------------------------
+// Section: Max/Min Macros
+// Desc: Standard binary max/min macros
+//------------------------------------------------------------------------------
+`ifdef MACROSAFE
+`define max(x,y) ((x) > (y) ? (x) : (y))
+`define min(x,y) ((x) < (y) ? (x) : (y))
+`endif
+//------------------------------------------------------------------------------
+
+//------------------------------------------------------------------------------
+// Section: Integer Division Macros
+// Desc: Rounding and ceiling for integer division
+//------------------------------------------------------------------------------
+`ifdef MACROSAFE
+`define divceil(x,y) (((x) + ((y) - 1)) / (y))
+`define divrnd(x,y) (((x) + ((y) >> 1)) / (y))
+`endif
+//------------------------------------------------------------------------------
--- /dev/null
+//==============================================================================
+// File: $URL: svn+ssh://repositorypub@repository.eecs.berkeley.edu/public/Projects/GateLib/branches/dev/Firmware/DRAM/Hardware/DDR2SDRAM/DDR2SDRAM.v $
+// Version: $Revision: 16878 $
+// Author: Greg Gibeling (http://gdgib.gotdns.com/~gdgib/)
+// Copyright: Copyright 2005-2008 UC Berkeley
+//==============================================================================
+
+//==============================================================================
+// Section: License
+//==============================================================================
+// Copyright (c) 2005-2008, Regents of the University of California
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without modification,
+// are permitted provided that the following conditions are met:
+//
+// - Redistributions of source code must retain the above copyright notice,
+// this list of conditions and the following disclaimer.
+// - Redistributions in binary form must reproduce the above copyright
+// notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+// - Neither the name of the University of California, Berkeley nor the
+// names of its contributors may be used to endorse or promote
+// products derived from this software without specific prior
+// written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
+// ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+// ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+//==============================================================================
+
+//==============================================================================
+// Includes
+//==============================================================================
+`include "Const.v"
+//==============================================================================
+
+//------------------------------------------------------------------------------
+// Module: DDR2SDRAM
+// Based On: svn+ssh://repositorypub@repository.eecs.berkeley.edu/public/Projects/GateLib/trunk/Firmware/DRAM/DRAM.v
+// Author: <a href="http://gdgib.gotdns.com/~gdgib/">Greg Gibeling</a>
+// Version: $Revision: 16878 $
+//------------------------------------------------------------------------------
+module DDR2SDRAM(
+ //------------------------------------------------------------------
+ // Clock & Reset Inputs
+ //------------------------------------------------------------------
+ Clock,
+ ClockD2,
+ ClockP90,
+ Reset,
+ Locked,
+ ClockF200,
+ //------------------------------------------------------------------
+
+ //------------------------------------------------------------------
+ // Status Outputs
+ //------------------------------------------------------------------
+ Initialized,
+ PoweredUp,
+ //------------------------------------------------------------------
+
+ //------------------------------------------------------------------
+ // Command Interface
+ //------------------------------------------------------------------
+ CommandClock,
+ CommandReset,
+
+ CommandAddress,
+ Command,
+ CommandValid,
+ CommandReady,
+ //------------------------------------------------------------------
+
+ //------------------------------------------------------------------
+ // Data Input (Write) Interface
+ //------------------------------------------------------------------
+ DataInClock,
+ DataInReset,
+
+ DataIn,
+ DataInMask,
+ DataInValid,
+ DataInReady,
+ //------------------------------------------------------------------
+
+ //------------------------------------------------------------------
+ // Data Output (Read) Interface
+ //------------------------------------------------------------------
+ DataOutClock,
+ DataOutReset,
+
+ DataOut,
+ DataOutErrorChecked,
+ DataOutErrorCorrected,
+ DataOutValid,
+ DataOutReady,
+ //------------------------------------------------------------------
+
+ //------------------------------------------------------------------
+ // DDR2 Memory Interface
+ //------------------------------------------------------------------
+ DDR2_DQ,
+ DDR2_A,
+ DDR2_BA,
+ DDR2_RAS_B,
+ DDR2_CAS_B,
+ DDR2_WE_B,
+ DDR2_CS0_B,
+ DDR2_ODT,
+ DDR2_CKE,
+ DDR2_DM,
+ DDR2_DQS_P,
+ DDR2_DQS_N,
+ DDR2_CLK_P,
+ DDR2_CLK_N
+ //------------------------------------------------------------------
+ );
+ //--------------------------------------------------------------------------
+ // Parameters
+ //--------------------------------------------------------------------------
+ parameter UWidth = 8, // This will almost ALWAYS be 8
+ BAWidth = 2, // Setup the addressing line for the ML505@256MB, Address components are listed from most to least significant
+ RAWidth = 13,
+ CAWidth = 10,
+ DWidth = 128, // 128b SDR internal transfers
+ BurstLen = 2, // 256b total burst, 2 words DWidth words at SDR, or 4 external words at DDR
+ EnableMask = 1,
+ EnableECC = 0,
+ Board = 0, // 0 - ML505, 1 - BEE3A, 2 - BEE3B
+ MultiClock = 0, // 0 - Use Clock & Reset for everything, 1 - Use the individual FIFO clock and resets
+ AdditiveLatency = 0;
+ //--------------------------------------------------------------------------
+
+ //--------------------------------------------------------------------------
+ // Fixed Constants
+ //--------------------------------------------------------------------------
+ `ifdef MACROSAFE
+ localparam UCount = DWidth / UWidth,
+ MWidth = (EnableECC || (EnableMask == 0)) ? 0 : UCount, // 128b/8 = 16b per mask means per-byte masking
+ UAWidth = `log2(UCount-1), // Unused lower address bits, the -1 is to get a proper log2
+ XAWidth = `max(RAWidth, CAWidth),
+ TAWidth = CAWidth + RAWidth + BAWidth,
+ AWidth = TAWidth + UAWidth - 1, // Note that the components are in order according to where in the address they appear, the -1 is to account for DDR
+ CommandMask = 7'b0000011, // Read & Write only
+ ECheck = EnableECC ? 2 : 0,
+ ECorrect = EnableECC ? 1 : 0,
+ CWidth = 3,
+ COMMAND_Write = 3'b000,
+ COMMAND_Read = 3'b001,
+ COMMAND_Flush = 3'b010,
+ COMMAND_Refresh = 3'b011,
+ COMMAND_AutoRefresh = 3'b100,
+ COMMAND_PowerDown = 3'b101,
+ COMMAND_PowerUp = 3'b110,
+ EHWidth = `max(`log2(ECheck), 1),
+ ERWidth = `max(`log2(ECheck), 1);
+ `endif
+ //--------------------------------------------------------------------------
+
+ //--------------------------------------------------------------------------
+ // Per-Board Settings
+ //--------------------------------------------------------------------------
+ // SHOULD BE A CASE BASED ON "Board"
+ localparam CKE_WIDTH = Board ? 1 : 1,
+ CLK_WIDTH = Board ? 1 : 2,
+ CS_NUM = Board ? 1 : 1,
+ CS_WIDTH = Board ? 1 : 1,
+ DM_WIDTH = EnableMask ? (UCount / 2) : 0,
+ DQ_WIDTH = (DWidth / 2) + (EnableECC ? (DWidth / 8) : 0),
+ DQ_PER_DQS = Board ? 4 : 8,
+ DQS_WIDTH = DQ_WIDTH/DQ_PER_DQS,
+ ODT_WIDTH = Board ? 1 : 1,
+ ADDITIVE_LAT = AdditiveLatency,
+ CAS_LAT = Board ? 4 : 4,
+ MULTI_BANK_EN = Board ? 1 : 1,
+ TWO_T_TIME_EN = Board ? 0 : 1,
+ ODT_TYPE = Board ? 3 : 1,
+ REDUCE_DRV = Board ? 1 : 0,
+ TREFI_NS = Board ? 7800 : 7800,
+ TRAS = Board ? 40000 : 40000,
+ TRCD = Board ? 15000 : 15000,
+ TRFC = Board ? 127500 : 105000,
+ TRP = Board ? 15000 : 15000,
+ TRTP = Board ? 7500 : 7500,
+ TWR = Board ? 15000 : 15000,
+ TWTR = Board ? 10000 : 7500,
+ HIGH_PERFORMANCE_MODE = "TRUE",
+ DQS_IO_COL = Board ? ((Board == 2) ? 36'b010000000000000000000101101010101010 : 36'b010000000000000000000101101010101010) : 16'b0000000000000000,
+ DQ_IO_MS = Board ? ((Board == 2) ? 72'b11011110_10011100_11001001_00111000_01101110_01100101_10101100_01011010_10011010 : 72'b11011010_10110001_01110101_10110100_10101100_01100101_11010100_11101000_10100011) : 64'b01110101_00111101_00001111_00011110_00101110_11000011_11000001_10111100,
+ CLK_PERIOD = Board ? 3750 : 3750;
+ //--------------------------------------------------------------------------
+
+ //--------------------------------------------------------------------------
+ // Internal Constants
+ //--------------------------------------------------------------------------
+ `ifdef MODELSIM
+ localparam SIM_ONLY = 1;
+ `else
+ localparam SIM_ONLY = 0;
+ `endif
+ //--------------------------------------------------------------------------
+
+ //--------------------------------------------------------------------------
+ // Clock & Reset Inputs
+ //--------------------------------------------------------------------------
+ input Clock, ClockD2, ClockP90, Reset, Locked;
+ input ClockF200;
+ //--------------------------------------------------------------------------
+
+ //--------------------------------------------------------------------------
+ // Status Outputs
+ //--------------------------------------------------------------------------
+ output Initialized;
+ output PoweredUp;
+ //--------------------------------------------------------------------------
+
+ //--------------------------------------------------------------------------
+ // Command Interface
+ //--------------------------------------------------------------------------
+ input CommandClock, CommandReset;
+
+ input [AWidth-1:0] CommandAddress;
+ input [CWidth-1:0] Command;
+ input CommandValid;
+ output CommandReady;
+ //--------------------------------------------------------------------------
+
+ //--------------------------------------------------------------------------
+ // Data Input (Write) Interface
+ //--------------------------------------------------------------------------
+ input DataInClock, DataInReset;
+
+ input [DWidth-1:0] DataIn;
+ input [MWidth-1:0] DataInMask;
+ input DataInValid;
+ output DataInReady;
+ //--------------------------------------------------------------------------
+
+ //--------------------------------------------------------------------------
+ // Data Output (Read) Interface
+ //--------------------------------------------------------------------------
+ input DataOutClock, DataOutReset;
+
+ output [DWidth-1:0] DataOut;
+ output [EHWidth-1:0] DataOutErrorChecked;
+ output [ERWidth-1:0] DataOutErrorCorrected;
+ output DataOutValid;
+ input DataOutReady;
+ //--------------------------------------------------------------------------
+
+ //--------------------------------------------------------------------------
+ // DDR2 Memory Interface
+ //--------------------------------------------------------------------------
+ inout [DQ_WIDTH-1:0] DDR2_DQ;
+ output [XAWidth-1:0] DDR2_A;
+ output [BAWidth-1:0] DDR2_BA;
+ output DDR2_RAS_B;
+ output DDR2_CAS_B;
+ output DDR2_WE_B;
+ output [CS_WIDTH-1:0] DDR2_CS0_B;
+ output DDR2_ODT;
+ output DDR2_CKE;
+ output [DM_WIDTH-1:0] DDR2_DM;
+ inout [DQS_WIDTH-1:0] DDR2_DQS_P;
+ inout [DQS_WIDTH-1:0] DDR2_DQS_N;
+ output [CLK_WIDTH-1:0] DDR2_CLK_P;
+ output [CLK_WIDTH-1:0] DDR2_CLK_N;
+ //--------------------------------------------------------------------------
+
+ //--------------------------------------------------------------------------
+ // Internal Wires
+ //--------------------------------------------------------------------------
+ wire app_af_afull, app_wdf_afull, rd_data_valid;
+ wire [1:0] rd_ecc_error;
+
+ wire Gate;
+ //--------------------------------------------------------------------------
+
+ //--------------------------------------------------------------------------
+ // Assign Statements
+ //--------------------------------------------------------------------------
+ assign CommandReady = ~app_af_afull & Gate;
+ assign DataInReady = ~app_wdf_afull & Gate;
+ assign DataOutValid = rd_data_valid & Gate;
+
+ assign DataOutErrorChecked = EnableECC ? rd_ecc_error[1] : {EHWidth{1'b0}};
+ assign DataOutErrorCorrected = EnableECC ? rd_ecc_error[0] : {ERWidth{1'b0}};
+
+ assign PoweredUp = 1'b1;
+ assign Gate = Initialized & ~Reset;
+ //--------------------------------------------------------------------------
+
+ //--------------------------------------------------------------------------
+ // Checks
+ //--------------------------------------------------------------------------
+ `ifdef MODELSIM
+ initial if ((Board < 0) || (Board > 2)) $display("ERROR: Board type ", Board, " is not supported 0 - ML505, 1 - BEE3A, 2 - BEE3B are valid!");
+ initial if (Board == 0) begin
+ if (DWidth != 128) $display("ERROR: ML505 supports only 128b DWidth!");
+ if (UWidth != 8) $display("ERROR: ML505 supports only 8b UWidth!");
+ if (EnableMask == 0) $display("ERROR: ML505 requires mask!");
+ if (EnableECC != 0) $display("ERROR: ML505 does not support ECC!");
+ end
+ initial if ((Board == 1) || (Board == 2)) begin
+ if (EnableECC != 0) begin
+ if (DWidth != 128) $display("ERROR: BEE3 supports only 128b DWidth when ECC is enabled!");
+ end else begin
+ if ((DWidth != 144) && (DWidth != 128)) $display("ERROR: BEE3 supports 128 or 144 DWidth when ECC is disabled!");
+ end
+ if (UWidth != 8) $display("ERROR: BEE3 supports only 8b UWidth!");
+ if (EnableMask != 0) $display("ERROR: BEE3 does not support mask!");
+ end
+ initial if ((DQ_WIDTH % UWidth) != 0) $display("ERROR: External data transfer width must be a multiple of the unit width: ", DQ_WIDTH, " is not a multiple of ", UWidth);
+ initial if ((BurstLen != 2) && (BurstLen != 4)) $display("ERROR: Interface burst length must be 2 or 4 (4 or 8 at DDR) not: ", BurstLen);
+ initial if (TAWidth > 31) $display("ERROR: MIG2.3 core only supports up to 31 internal address bits (TAWidth > 31 is invalid)!");
+ always @ (posedge Clock) begin
+ if (CommandReady & CommandValid & ~((CommandMask >> Command) & 1'b1)) $display("ERROR: Unsupported memory command: ", Command);
+ end
+ `endif
+ //--------------------------------------------------------------------------
+
+ //--------------------------------------------------------------------------
+ // MIG 2.x DDR2 SDRAM Controller
+ //--------------------------------------------------------------------------
+ ddr2_sdram #( .BANK_WIDTH( BAWidth), // # of memory bank addr bits
+ .CKE_WIDTH( CKE_WIDTH), // # of memory clock enable outputs
+ .CLK_WIDTH( CLK_WIDTH), // # of clock outputs
+ .COL_WIDTH( CAWidth), // # of memory column bits
+ .CS_NUM( CS_NUM), // # of separate memory chip selects
+ .CS_WIDTH( CS_WIDTH), // # of total memory chip selects
+ .CS_BITS( `log2(CS_NUM)), // set to log2(CS_NUM) (rounded up)
+ .DM_WIDTH( DM_WIDTH), // # of data mask bits
+ .DQ_WIDTH( DQ_WIDTH), // # of data width
+ .DQ_PER_DQS( DQ_PER_DQS), // # of DQ data bits per strobe
+ .DQS_WIDTH( DQS_WIDTH), // # of DQS strobes
+ .DQ_BITS( `log2(DQ_WIDTH-1)), // set to log2(DQS_WIDTH*DQ_PER_DQS)
+ .DQS_BITS( `log2((DQ_WIDTH/DQ_PER_DQS)-1)), // set to log2(DQS_WIDTH)
+ .ODT_WIDTH( ODT_WIDTH), // # of memory on-die term enables
+ .ROW_WIDTH( RAWidth), // # of memory row and # of addr bits
+ .ADDITIVE_LAT( ADDITIVE_LAT), // additive write latency
+ .BURST_LEN( BurstLen * 2), // burst length (in double words)
+ .BURST_TYPE( 0), // burst type (=0 seq; =1 interleaved), totally useless thanks to the DDR to SDR conversion
+ .CAS_LAT( CAS_LAT), // CAS latency
+ .ECC_ENABLE( EnableECC), // enable ECC (=1 enable)
+ .APPDATA_WIDTH( DWidth), // # of usr read/write data bus bits
+ .MULTI_BANK_EN( MULTI_BANK_EN), // Keeps multiple banks open. (= 1 enable)
+ .TWO_T_TIME_EN( TWO_T_TIME_EN), // 2t timing for unbuffered dimms
+ .ODT_TYPE( ODT_TYPE), // ODT (=0(none),=1(75),=2(150),=3(50))
+ .REDUCE_DRV( REDUCE_DRV), // reduced strength mem I/O (=1 yes)
+ .REG_ENABLE( 0), // registered addr/ctrl (=1 yes), cannot be changed without rerunning MIG/CoreGen
+ .TREFI_NS( TREFI_NS), // auto refresh interval (ns)
+ .TRAS( TRAS), // active->precharge delay
+ .TRCD( TRCD), // active->read/write delay
+ .TRFC( TRFC), // refresh->refresh, refresh->active delay
+ .TRP( TRP), // precharge->command delay
+ .TRTP( TRTP), // read->precharge delay
+ .TWR( TWR), // used to determine write->precharge
+ .TWTR( TWTR), // write->read delay
+ .HIGH_PERFORMANCE_MODE(HIGH_PERFORMANCE_MODE), // TRUE, the IODELAY performance mode is set to high. FALSE, the IODELAY performance mode is set to low.
+ .SIM_ONLY( SIM_ONLY), // = 1 to skip SDRAM power up delay
+ .DEBUG_EN( 0), // Enable debug signals/controls
+ .DQS_IO_COL( DQS_IO_COL), // I/O column location of DQS groups (=0, left; =1 center, =2 right)
+ .DQ_IO_MS( DQ_IO_MS), // Master/Slave location of DQ I/O (=0 slave)
+ .CLK_PERIOD( CLK_PERIOD), // Core/Memory clock period (in ps)
+ .RST_ACT_LOW( 0), // =1 for active low reset, =0 for active high
+ .EN_SYN( MultiClock ? "FALSE" : "TRUE"))
+ mig20( .ddr2_dq( DDR2_DQ),
+ .ddr2_a( DDR2_A),
+ .ddr2_ba( DDR2_BA),
+ .ddr2_ras_n( DDR2_RAS_B),
+ .ddr2_cas_n( DDR2_CAS_B),
+ .ddr2_we_n( DDR2_WE_B),
+ .ddr2_cs_n( DDR2_CS0_B),
+ .ddr2_odt( DDR2_ODT),
+ .ddr2_cke( DDR2_CKE),
+ .ddr2_dm( DDR2_DM),
+ .ddr2_dqs( DDR2_DQS_P),
+ .ddr2_dqs_n( DDR2_DQS_N),
+ .ddr2_ck( DDR2_CLK_P),
+ .ddr2_ck_n( DDR2_CLK_N),
+
+ .sys_rst_n( Reset),
+ .phy_init_done( Initialized),
+ .dcm_lock( Locked),
+ .rst0_tb( ),
+ .clk0_tb( ),
+ .clk0( Clock),
+ .clk90( ClockP90),
+ .clk200( ClockF200),
+ .clkdiv0( ClockD2),
+
+ .af_clk( MultiClock ? CommandClock : Clock),
+ .af_rst( MultiClock ? CommandReset : Reset),
+ .app_af_afull( app_af_afull),
+ .app_af_wren( CommandValid & (~|Command[2:1]) & CommandReady & Gate),
+ .app_af_addr( {{((30 - AWidth) + UAWidth){1'b0}}, CommandAddress[AWidth-1:UAWidth], 1'b0}), // The final 1'b0 is to compensate for the DDR to SDR conversion
+ .app_af_cmd( {2'b00, Command[0]}),
+
+ .wb_clk( MultiClock ? DataInClock : Clock),
+ .wb_rst( MultiClock ? DataInReset : Reset),
+ .app_wdf_afull( app_wdf_afull),
+ .app_wdf_wren( DataInValid & DataInReady & Gate),
+ .app_wdf_data( DataIn),
+ .app_wdf_mask_data( DataInMask),
+
+ .rb_clk( MultiClock ? DataOutClock : Clock),
+ .rb_rst( MultiClock ? DataOutReset : Reset),
+ .rd_data_valid( rd_data_valid),
+ .rd_ecc_error( rd_ecc_error),
+ .rd_data_rden( DataOutReady & Gate),
+ .rd_data_fifo_out( DataOut),
+ .rb_full( ));
+ //--------------------------------------------------------------------------
+endmodule
+//------------------------------------------------------------------------------
--- /dev/null
+================================================================================
+DDR2SDRAM MIG Core v1.2008.10.16 - by Greg Gibeling - Copyright 2005-2008 UC Berkeley
+
+File: $URL: svn+ssh://repositorypub@repository.eecs.berkeley.edu/public/Projects/GateLib/branches/dev/Firmware/DRAM/Hardware/DDR2SDRAM/MIG/Readme.txt $
+Version: $Revision: 16601 $
+Author: Greg Gibeling (http://gdgib.gotdns.com/~gdgib/)
+Copyright: Copyright 2005-2008 UC Berkeley
+================================================================================
+
+================================================================================
+Copyright (c) 2005-2008, Regents of the University of California
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without modification,
+are permitted provided that the following conditions are met:
+
+ - Redistributions of source code must retain the above copyright notice,
+ this list of conditions and the following disclaimer.
+ - Redistributions in binary form must reproduce the above copyright
+ notice, this list of conditions and the following disclaimer
+ in the documentation and/or other materials provided with the
+ distribution.
+ - Neither the name of the University of California, Berkeley nor the
+ names of its contributors may be used to endorse or promote
+ products derived from this software without specific prior
+ written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
+ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+================================================================================
+
+================================================================================
+Licensing
+ Note that the BSD license above only applies to this file and any changes to
+ the MIG design after it was generated by CoreGen/MIG, not to the complete
+ MIG generated core!
+
+Board Instructions
+ Set ML505 board to 200MHz -> 01001010 = 0x4A
+
+Instructions for Updating MIG version
+ Xilinx Webupdate (MIG gets updated a lot)
+ Launch Coregen
+ Create a project in any empty directory
+ ML505/Externals/DDR2CoreGen
+ May need to rename the mig_xx directory to match new core name
+ commit
+ delete all files from working copy only
+ Project Settings
+ XC5VLX50T, FFG1136, -1C
+ Verilog Output, XST, NGC, B[n:m] busses
+ Memories & Storage Elements -> Memory Interface Generator -> MIG2.3
+ Option1: Update the Design using MIG
+ You will need to provide the prj file & ucf
+ MIG will generate a complete new design with the same options
+ Option2: Recreate Design from Scratch
+ Page1
+ Create a design
+ Name: ???
+ 1 Controller
+ Page2 - No additional parts (why bother?)
+ Page3 - Use DDR2 SDRAM
+ Page4
+ Speed: 266MHz
+ Type: SODIMMs
+ Part: MT4HTF3264HY-53E
+ Width: 64b
+ DataMask: Enable
+ Page5 (default)
+ Burst Length: 4
+ Burst Type: Sequential
+ Page6 (default)
+ Output Drive Strength: Fullstrength
+ RTT (nominal) - ODT: 75ohms
+ Additive Latency (AL): 0
+ Page7
+ Use DCM: disable
+ DCI for DQ/DQS: Enable
+ DCI for Address/Control: Disable
+ SSTL for Address/Control: Class II
+ Debug Signals: Disable
+ Page8 - Pin reservations, no change, empty on right
+ Page9 - Defaults
+ Page10 - Summary
+ Page11 - Accept license for sim models
+ Page12 - Ignore
+ Page13 - Design Notes (may want to print)
+ Merge into SVN
+ can use diff to review changes
+ old version had ML505 overlay in it, make sure relevant changes stay (icon/ila/chipscope of course, but also the UCF!)
+ commit new version
+ Merge into ML505/Hardware/DDR2SDRAM
+ Delete old files (make sure changes had been commited)
+ copy the user_design/RTL into Hardwre/DDR2SDRAM/MIG
+ Use diff to review changes
+ Make sure ML505 specific changes stick around
+ file not in MIG: ddr2_sdram.ucf
+ multiple changes: ddr2_sdram.v
+ rd_data_rden: ddr2_mem_if_top, ddr2_top, ddr2_usr_top, ddr2_usr_rd
+ rd_fifo_clear, wr_fifo_clear: ddr2_usr_rd, ddr2_usr_wr, ddr2_usr_top
+ Update DDR2SDRAM.v with any new parameters or signals
+================================================================================
\ No newline at end of file
--- /dev/null
+XILINX-XDB 0.1 STUB 0.1 ASCII
+XILINX-XDM V1.4e
+$0de
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\ No newline at end of file
--- /dev/null
+/*******************************************************************************
+* This file is owned and controlled by Xilinx and must be used *
+* solely for design, simulation, implementation and creation of *
+* design files limited to Xilinx devices or technologies. Use *
+* with non-Xilinx devices or technologies is expressly prohibited *
+* and immediately terminates your license. *
+* *
+* XILINX IS PROVIDING THIS DESIGN, CODE, OR INFORMATION "AS IS" *
+* SOLELY FOR USE IN DEVELOPING PROGRAMS AND SOLUTIONS FOR *
+* XILINX DEVICES. BY PROVIDING THIS DESIGN, CODE, OR INFORMATION *
+* AS ONE POSSIBLE IMPLEMENTATION OF THIS FEATURE, APPLICATION *
+* OR STANDARD, XILINX IS MAKING NO REPRESENTATION THAT THIS *
+* IMPLEMENTATION IS FREE FROM ANY CLAIMS OF INFRINGEMENT, *
+* AND YOU ARE RESPONSIBLE FOR OBTAINING ANY RIGHTS YOU MAY REQUIRE *
+* FOR YOUR IMPLEMENTATION. XILINX EXPRESSLY DISCLAIMS ANY *
+* WARRANTY WHATSOEVER WITH RESPECT TO THE ADEQUACY OF THE *
+* IMPLEMENTATION, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OR *
+* REPRESENTATIONS THAT THIS IMPLEMENTATION IS FREE FROM CLAIMS OF *
+* INFRINGEMENT, IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS *
+* FOR A PARTICULAR PURPOSE. *
+* *
+* Xilinx products are not intended for use in life support *
+* appliances, devices, or systems. Use in such applications are *
+* expressly prohibited. *
+* *
+* (c) Copyright 1995-2007 Xilinx, Inc. *
+* All rights reserved. *
+*******************************************************************************/
+// The synthesis directives "translate_off/translate_on" specified below are
+// supported by Xilinx, Mentor Graphics and Synplicity synthesis
+// tools. Ensure they are correct for your synthesis tool(s).
+
+// You must compile the wrapper file asyncfifo_dmem_1b.v when simulating
+// the core, asyncfifo_dmem_1b. When compiling the wrapper file, be sure to
+// reference the XilinxCoreLib Verilog simulation library. For detailed
+// instructions, please refer to the "CORE Generator Help".
+
+`timescale 1ns/1ps
+
+module asyncfifo_dmem_1b(
+ din,
+ rd_clk,
+ rd_en,
+ rst,
+ wr_clk,
+ wr_en,
+ dout,
+ empty,
+ full);
+
+
+input [0 : 0] din;
+input rd_clk;
+input rd_en;
+input rst;
+input wr_clk;
+input wr_en;
+output [0 : 0] dout;
+output empty;
+output full;
+
+// synthesis translate_off
+
+ FIFO_GENERATOR_V4_3 #(
+ .C_COMMON_CLOCK(0),
+ .C_COUNT_TYPE(0),
+ .C_DATA_COUNT_WIDTH(6),
+ .C_DEFAULT_VALUE("BlankString"),
+ .C_DIN_WIDTH(1),
+ .C_DOUT_RST_VAL("0"),
+ .C_DOUT_WIDTH(1),
+ .C_ENABLE_RLOCS(0),
+ .C_FAMILY("virtex5"),
+ .C_FULL_FLAGS_RST_VAL(1),
+ .C_HAS_ALMOST_EMPTY(0),
+ .C_HAS_ALMOST_FULL(0),
+ .C_HAS_BACKUP(0),
+ .C_HAS_DATA_COUNT(0),
+ .C_HAS_INT_CLK(0),
+ .C_HAS_MEMINIT_FILE(0),
+ .C_HAS_OVERFLOW(0),
+ .C_HAS_RD_DATA_COUNT(0),
+ .C_HAS_RD_RST(0),
+ .C_HAS_RST(1),
+ .C_HAS_SRST(0),
+ .C_HAS_UNDERFLOW(0),
+ .C_HAS_VALID(0),
+ .C_HAS_WR_ACK(0),
+ .C_HAS_WR_DATA_COUNT(0),
+ .C_HAS_WR_RST(0),
+ .C_IMPLEMENTATION_TYPE(2),
+ .C_INIT_WR_PNTR_VAL(0),
+ .C_MEMORY_TYPE(2),
+ .C_MIF_FILE_NAME("BlankString"),
+ .C_MSGON_VAL(1),
+ .C_OPTIMIZATION_MODE(0),
+ .C_OVERFLOW_LOW(0),
+ .C_PRELOAD_LATENCY(0),
+ .C_PRELOAD_REGS(1),
+ .C_PRIM_FIFO_TYPE("512x36"),
+ .C_PROG_EMPTY_THRESH_ASSERT_VAL(4),
+ .C_PROG_EMPTY_THRESH_NEGATE_VAL(5),
+ .C_PROG_EMPTY_TYPE(0),
+ .C_PROG_FULL_THRESH_ASSERT_VAL(62),
+ .C_PROG_FULL_THRESH_NEGATE_VAL(61),
+ .C_PROG_FULL_TYPE(0),
+ .C_RD_DATA_COUNT_WIDTH(6),
+ .C_RD_DEPTH(64),
+ .C_RD_FREQ(1),
+ .C_RD_PNTR_WIDTH(6),
+ .C_UNDERFLOW_LOW(0),
+ .C_USE_DOUT_RST(1),
+ .C_USE_ECC(0),
+ .C_USE_EMBEDDED_REG(0),
+ .C_USE_FIFO16_FLAGS(0),
+ .C_USE_FWFT_DATA_COUNT(0),
+ .C_VALID_LOW(0),
+ .C_WR_ACK_LOW(0),
+ .C_WR_DATA_COUNT_WIDTH(6),
+ .C_WR_DEPTH(64),
+ .C_WR_FREQ(1),
+ .C_WR_PNTR_WIDTH(6),
+ .C_WR_RESPONSE_LATENCY(1))
+ inst (
+ .DIN(din),
+ .RD_CLK(rd_clk),
+ .RD_EN(rd_en),
+ .RST(rst),
+ .WR_CLK(wr_clk),
+ .WR_EN(wr_en),
+ .DOUT(dout),
+ .EMPTY(empty),
+ .FULL(full),
+ .CLK(),
+ .INT_CLK(),
+ .BACKUP(),
+ .BACKUP_MARKER(),
+ .PROG_EMPTY_THRESH(),
+ .PROG_EMPTY_THRESH_ASSERT(),
+ .PROG_EMPTY_THRESH_NEGATE(),
+ .PROG_FULL_THRESH(),
+ .PROG_FULL_THRESH_ASSERT(),
+ .PROG_FULL_THRESH_NEGATE(),
+ .RD_RST(),
+ .SRST(),
+ .WR_RST(),
+ .ALMOST_EMPTY(),
+ .ALMOST_FULL(),
+ .DATA_COUNT(),
+ .OVERFLOW(),
+ .PROG_EMPTY(),
+ .PROG_FULL(),
+ .VALID(),
+ .RD_DATA_COUNT(),
+ .UNDERFLOW(),
+ .WR_ACK(),
+ .WR_DATA_COUNT(),
+ .SBITERR(),
+ .DBITERR());
+
+
+// synthesis translate_on
+
+endmodule
+
--- /dev/null
+//*****************************************************************************
+// DISCLAIMER OF LIABILITY
+//
+// This text/file contains proprietary, confidential
+// information of Xilinx, Inc., is distributed under license
+// from Xilinx, Inc., and may be used, copied and/or
+// disclosed only pursuant to the terms of a valid license
+// agreement with Xilinx, Inc. Xilinx hereby grants you a
+// license to use this text/file solely for design, simulation,
+// implementation and creation of design files limited
+// to Xilinx devices or technologies. Use with non-Xilinx
+// devices or technologies is expressly prohibited and
+// immediately terminates your license unless covered by
+// a separate agreement.
+//
+// Xilinx is providing this design, code, or information
+// "as-is" solely for use in developing programs and
+// solutions for Xilinx devices, with no obligation on the
+// part of Xilinx to provide support. By providing this design,
+// code, or information as one possible implementation of
+// this feature, application or standard, Xilinx is making no
+// representation that this implementation is free from any
+// claims of infringement. You are responsible for
+// obtaining any rights you may require for your implementation.
+// Xilinx expressly disclaims any warranty whatsoever with
+// respect to the adequacy of the implementation, including
+// but not limited to any warranties or representations that this
+// implementation is free from claims of infringement, implied
+// warranties of merchantability or fitness for a particular
+// purpose.
+//
+// Xilinx products are not intended for use in life support
+// appliances, devices, or systems. Use in such applications is
+// expressly prohibited.
+//
+// Any modifications that are made to the Source Code are
+// done at the user�s sole risk and will be unsupported.
+//
+// Copyright (c) 2006-2007 Xilinx, Inc. All rights reserved.
+//
+// This copyright and support notice must be retained as part
+// of this text at all times.
+//*****************************************************************************
+// ____ ____
+// / /\/ /
+// /___/ \ / Vendor: Xilinx
+// \ \ \/ Version: 2.3
+// \ \ Application: MIG
+// / / Filename: ddr2_ctrl.v
+// /___/ /\ Date Last Modified: $Date: 2008/07/29 15:24:03 $
+// \ \ / \ Date Created: Wed Aug 30 2006
+// \___\/\___\
+//
+//
+//Device: Virtex-5
+//Design Name: DDR/DDR2
+//Purpose:
+// This module is the main control logic of the memory interface. All
+// commands are issued from here according to the burst, CAS Latency and the
+// user commands.
+//Reference:
+//Revision History:
+// Rev 1.2 - Fixed auto refresh to activate bug. KP 11-19-2007
+// Rev 1.3 - For Dual Rank parts support CS logic modified. KP. 05/08/08
+// Rev 1.4 - AUTO_REFRESH_WAIT state modified for Auto Refresh flag asserted
+// immediately after calibration is completed. KP. 07/28/08
+//*****************************************************************************
+
+`timescale 1ns/1ps
+
+module ddr2_ctrl #
+ (
+ // Following parameters are for 72-bit RDIMM design (for ML561 Reference
+ // board design). Actual values may be different. Actual parameters values
+ // are passed from design top module ddr2_sdram module. Please refer to
+ // the ddr2_sdram module for actual values.
+ parameter BANK_WIDTH = 2,
+ parameter COL_WIDTH = 10,
+ parameter CS_BITS = 0,
+ parameter CS_NUM = 1,
+ parameter ROW_WIDTH = 14,
+ parameter ADDITIVE_LAT = 0,
+ parameter BURST_LEN = 4,
+ parameter CAS_LAT = 5,
+ parameter ECC_ENABLE = 0,
+ parameter REG_ENABLE = 1,
+ parameter TREFI_NS = 7800,
+ parameter TRAS = 40000,
+ parameter TRCD = 15000,
+ parameter TRRD = 10000,
+ parameter TRFC = 105000,
+ parameter TRP = 15000,
+ parameter TRTP = 7500,
+ parameter TWR = 15000,
+ parameter TWTR = 10000,
+ parameter CLK_PERIOD = 3000,
+ parameter MULTI_BANK_EN = 1,
+ parameter TWO_T_TIME_EN = 0,
+ parameter DDR_TYPE = 1
+ )
+ (
+ input clk,
+ input rst,
+ input [2:0] af_cmd,
+ input [30:0] af_addr,
+ input af_empty,
+ input rd_fifo_clear,
+ input wr_fifo_clear,
+ output reg wr_fifo_burst,
+ input phy_init_done,
+ output ctrl_ref_flag,
+ output ctrl_af_rden,
+ output reg ctrl_wren,
+ output reg ctrl_rden,
+ output [ROW_WIDTH-1:0] ctrl_addr,
+ output [BANK_WIDTH-1:0] ctrl_ba,
+ output ctrl_ras_n,
+ output ctrl_cas_n,
+ output ctrl_we_n,
+ output [CS_NUM-1:0] ctrl_cs_n
+ );
+
+ // input address split into various ranges
+ localparam ROW_RANGE_START = COL_WIDTH;
+ localparam ROW_RANGE_END = ROW_WIDTH + ROW_RANGE_START - 1;
+ localparam BANK_RANGE_START = ROW_RANGE_END + 1;
+ localparam BANK_RANGE_END = BANK_WIDTH + BANK_RANGE_START - 1;
+ localparam CS_RANGE_START = BANK_RANGE_START + BANK_WIDTH;
+ localparam CS_RANGE_END = CS_BITS + CS_RANGE_START - 1;
+ // compare address (for determining bank/row hits) split into various ranges
+ // (compare address doesn't include column bits)
+ localparam CMP_WIDTH = CS_BITS + BANK_WIDTH + ROW_WIDTH;
+ localparam CMP_ROW_RANGE_START = 0;
+ localparam CMP_ROW_RANGE_END = ROW_WIDTH + CMP_ROW_RANGE_START - 1;
+ localparam CMP_BANK_RANGE_START = CMP_ROW_RANGE_END + 1;
+ localparam CMP_BANK_RANGE_END = BANK_WIDTH + CMP_BANK_RANGE_START - 1;
+ localparam CMP_CS_RANGE_START = CMP_BANK_RANGE_END + 1;
+ localparam CMP_CS_RANGE_END = CS_BITS + CMP_CS_RANGE_START-1;
+
+ localparam BURST_LEN_DIV2 = BURST_LEN / 2;
+ localparam OPEN_BANK_NUM = 4;
+ localparam CS_BITS_FIX = (CS_BITS == 0) ? 1 : CS_BITS;
+
+ // calculation counters based on clock cycle and memory parameters
+ // TRAS: ACTIVE->PRECHARGE interval - 2
+ localparam integer TRAS_CYC = (TRAS + CLK_PERIOD)/CLK_PERIOD;
+ // TRCD: ACTIVE->READ/WRITE interval - 3 (for DDR2 factor in ADD_LAT)
+ localparam integer TRRD_CYC = (TRRD + CLK_PERIOD)/CLK_PERIOD;
+ localparam integer TRCD_CYC = (((TRCD + CLK_PERIOD)/CLK_PERIOD) >
+ ADDITIVE_LAT )?
+ ((TRCD+CLK_PERIOD)/ CLK_PERIOD) - ADDITIVE_LAT : 0;
+ // TRFC: REFRESH->REFRESH, REFRESH->ACTIVE interval - 2
+ localparam integer TRFC_CYC = (TRFC + CLK_PERIOD)/CLK_PERIOD;
+ // TRP: PRECHARGE->COMMAND interval - 2
+ // for precharge all add 1 extra clock cycle
+ localparam integer TRP_CYC = ((TRP + CLK_PERIOD)/CLK_PERIOD) +1;
+ // TRTP: READ->PRECHARGE interval - 2 (Al + BL/2 + (max (TRTP, 2tck))-2
+ localparam integer TRTP_TMP_MIN = (((TRTP + CLK_PERIOD)/CLK_PERIOD) >= 2)?
+ ((TRTP + CLK_PERIOD)/CLK_PERIOD) : 2;
+ localparam integer TRTP_CYC = TRTP_TMP_MIN + ADDITIVE_LAT
+ + BURST_LEN_DIV2 - 2;
+ // TWR: WRITE->PRECHARGE interval - 2
+ localparam integer WR_LAT = (DDR_TYPE > 0) ? CAS_LAT + ADDITIVE_LAT - 1 : 1;
+ localparam integer TWR_CYC = ((TWR + CLK_PERIOD)/CLK_PERIOD) +
+ WR_LAT + BURST_LEN_DIV2 ;
+ // TWTR: WRITE->READ interval - 3 (for DDR1, TWTR = 2 clks)
+ // DDR2 = CL-1 + BL/2 +TWTR
+ localparam integer TWTR_TMP_MIN = (TWTR + CLK_PERIOD)/CLK_PERIOD;
+ localparam integer TWTR_CYC = (DDR_TYPE > 0) ? (TWTR_TMP_MIN + (CAS_LAT -1)
+ + BURST_LEN_DIV2 ): 2;
+
+ // TRTW: READ->WRITE interval - 3
+ // DDR1: CL + (BL/2)
+ // DDR2: (BL/2) + 2. Two more clocks are added to
+ // the DDR2 counter to account for the delay in
+ // arrival of the DQS during reads (pcb trace + buffer
+ // delays + memory parameters).
+ localparam TRTW_CYC = (DDR_TYPE > 0) ? BURST_LEN_DIV2 + 4 :
+ (CAS_LAT == 25) ? 2 + BURST_LEN_DIV2 : CAS_LAT + BURST_LEN_DIV2;
+
+ localparam integer CAS_LAT_RD = (CAS_LAT == 25) ? 2 : CAS_LAT;
+
+ // Make sure all values >= 0 (some may be = 0)
+ localparam TRAS_COUNT = (TRAS_CYC > 0) ? TRAS_CYC : 0;
+ localparam TRCD_COUNT = (TRCD_CYC > 0) ? TRCD_CYC : 0;
+ localparam TRRD_COUNT = (TRRD_CYC > 0) ? TRRD_CYC : 0;
+ localparam TRFC_COUNT = (TRFC_CYC > 0) ? TRFC_CYC : 0;
+ localparam TRP_COUNT = (TRP_CYC > 0) ? TRP_CYC : 0;
+ localparam TRTP_COUNT = (TRTP_CYC > 0) ? TRTP_CYC : 0;
+ localparam TWR_COUNT = (TWR_CYC > 0) ? TWR_CYC : 0;
+ localparam TWTR_COUNT = (TWTR_CYC > 0) ? TWTR_CYC : 0;
+ localparam TRTW_COUNT = (TRTW_CYC > 0) ? TRTW_CYC : 0;
+
+ // Auto refresh interval
+ localparam TREFI_COUNT = ((TREFI_NS * 1000)/CLK_PERIOD) - 1;
+
+ // memory controller states
+ localparam CTRL_IDLE = 5'h00;
+ localparam CTRL_PRECHARGE = 5'h01;
+ localparam CTRL_PRECHARGE_WAIT = 5'h02;
+ localparam CTRL_AUTO_REFRESH = 5'h03;
+ localparam CTRL_AUTO_REFRESH_WAIT = 5'h04;
+ localparam CTRL_ACTIVE = 5'h05;
+ localparam CTRL_ACTIVE_WAIT = 5'h06;
+ localparam CTRL_BURST_READ = 5'h07;
+ localparam CTRL_READ_WAIT = 5'h08;
+ localparam CTRL_BURST_WRITE = 5'h09;
+ localparam CTRL_WRITE_WAIT = 5'h0A;
+ localparam CTRL_PRECHARGE_WAIT1 = 5'h0B;
+
+
+ reg [CMP_WIDTH-1:0] act_addr_r;
+ wire [30:0] af_addr_r;
+ reg [30:0] af_addr_r1;
+ reg [30:0] af_addr_r2;
+ reg [30:0] af_addr_r3;
+ wire [2:0] af_cmd_r;
+ reg [2:0] af_cmd_r1;
+ reg [2:0] af_cmd_r2;
+ reg af_valid_r;
+ reg af_valid_r1;
+ reg af_valid_r2;
+ reg [CS_BITS_FIX :0] auto_cnt_r;
+ reg auto_ref_r;
+ reg [(OPEN_BANK_NUM*CMP_WIDTH)-1:0] bank_cmp_addr_r;
+ reg [OPEN_BANK_NUM-1:0] bank_hit;
+ reg [OPEN_BANK_NUM-1:0] bank_hit_r;
+ reg [OPEN_BANK_NUM-1:0] bank_hit_r1;
+ reg [OPEN_BANK_NUM-1:0] bank_valid_r;
+ reg bank_conflict_r;
+ reg conflict_resolved_r;
+ reg ctrl_af_rden_r;
+ reg conflict_detect_r;
+ wire conflict_detect;
+ reg cs_change_r;
+ reg cs_change_sticky_r;
+ reg [ROW_WIDTH-1:0] ddr_addr_r;
+ wire [ROW_WIDTH-1:0] ddr_addr_col;
+ wire [ROW_WIDTH-1:0] ddr_addr_row;
+ reg [BANK_WIDTH-1:0] ddr_ba_r;
+ reg ddr_cas_n_r;
+ reg [CS_NUM-1:0] ddr_cs_n_r;
+ reg ddr_ras_n_r;
+ reg ddr_we_n_r;
+ reg [4:0] next_state;
+ reg no_precharge_wait_r;
+ reg no_precharge_r;
+ reg no_precharge_r1;
+ reg phy_init_done_r;
+ reg [4:0] precharge_ok_cnt_r;
+ reg precharge_ok_r;
+ reg [4:0] ras_cnt_r;
+ reg [3:0] rcd_cnt_r;
+ reg rcd_cnt_ok_r;
+ reg [2:0] rdburst_cnt_r;
+ reg rdburst_ok_r;
+ reg rdburst_rden_ok_r;
+ reg rd_af_flag_r;
+ wire rd_flag;
+ reg rd_flag_r;
+ reg [4:0] rd_to_wr_cnt_r;
+ reg rd_to_wr_ok_r;
+ reg ref_flag_r;
+ reg [11:0] refi_cnt_r;
+ reg refi_cnt_ok_r;
+ reg rst_r
+ /* synthesis syn_preserve = 1 */;
+ reg rst_r1
+ /* synthesis syn_maxfan = 10 */;
+ reg [7:0] rfc_cnt_r;
+ reg rfc_ok_r;
+ reg [3:0] row_miss;
+ reg [3:0] row_conflict_r;
+ reg [3:0] rp_cnt_r;
+ reg rp_cnt_ok_r;
+ reg [CMP_WIDTH-1:0] sb_open_add_r;
+ reg [4:0] state_r;
+ reg [4:0] state_r1;
+ wire sm_rden;
+ reg sm_rden_r;
+ reg [2:0] trrd_cnt_r;
+ reg trrd_cnt_ok_r;
+ reg [2:0] two_t_enable_r;
+ reg [CS_NUM-1:0] two_t_enable_r1;
+ reg [2:0] wrburst_cnt_r;
+ reg wrburst_ok_r;
+ reg wrburst_wren_ok_r;
+ wire wr_flag;
+ reg wr_flag_r;
+ reg [4:0] wr_to_rd_cnt_r;
+ reg wr_to_rd_ok_r;
+
+ // XST attributes for local reset "tree"
+ // synthesis attribute shreg_extract of rst_r is "no";
+ // synthesis attribute shreg_extract of rst_r1 is "no";
+ // synthesis attribute equivalent_register_removal of rst_r is "no"
+
+ //***************************************************************************
+
+ // sm_rden is used to assert read enable to the address FIFO
+ assign sm_rden = ((state_r == CTRL_BURST_WRITE) ||
+ (state_r == CTRL_BURST_READ)) ;
+
+ // assert read flag to the adress FIFO
+ assign ctrl_af_rden = sm_rden || rd_af_flag_r;
+
+ // local reset "tree" for controller logic only. Create this to ease timing
+ // on reset path. Prohibit equivalent register removal on RST_R to prevent
+ // "sharing" with other local reset trees (caution: make sure global fanout
+ // limit is set to large enough value, otherwise SLICES may be used for
+ // fanout control on RST_R.
+ always @(posedge clk) begin
+ rst_r <= rst;
+ rst_r1 <= rst_r;
+ end
+
+ //*****************************************************************
+ // interpret commands from Command/Address FIFO
+ //*****************************************************************
+
+ assign wr_flag = (af_valid_r2) ? ((af_cmd_r2 == 3'b000) ? 1'b1 : 1'b0): 1'b0;
+ assign rd_flag = (af_valid_r2) ? ((af_cmd_r2 == 3'b001) ? 1'b1 : 1'b0): 1'b0;
+
+ always @(posedge clk) begin
+ rd_flag_r <= rd_flag;
+ wr_flag_r <= wr_flag;
+ end
+
+ //////////////////////////////////////////////////
+ // The data from the address FIFO is fetched and
+ // stored in two register stages. The data will be
+ // pulled out of the second register stage whenever
+ // the state machine can handle new data from the
+ // address FIFO.
+
+ // This flag is asserted when there is no
+ // cmd & address in the pipe. When there is
+ // valid cmd & addr from the address FIFO the
+ // af_valid signals will be asserted. This flag will
+ // be set the cycle af_valid_r is de-asserted.
+ always @(posedge clk) begin
+ // for simulation purposes - to force CTRL_AF_RDEN low during reset
+ if (rst_r1)
+ rd_af_flag_r <= 1'd0;
+ else if((ctrl_af_rden_r) ||
+ (rd_af_flag_r && (af_valid_r || af_valid_r1)))
+ rd_af_flag_r <= 1'd0;
+ else if (~af_valid_r1 || ~af_valid_r)
+ rd_af_flag_r <= 1'd1;
+
+ end
+
+ // First register stage for the cmd & add from the FIFO.
+ // The af_valid_r signal gives the status of the data
+ // in this stage. The af_valid_r will be asserted when there
+ // is valid data. This register stage will be updated
+ // 1. read to the FIFO and the FIFO not empty
+ // 2. After write and read states
+ // 3. The valid signal is not asserted in the last stage.
+ always @(posedge clk) begin
+ if (rst_r1)begin
+ af_valid_r <= 1'd0;
+ end else begin
+ if (ctrl_af_rden_r || sm_rden_r || ~af_valid_r1
+ || ~af_valid_r2)begin
+ af_valid_r <= ctrl_af_rden_r;
+ end
+ end
+ end
+
+ // The output register in the FIFO is used. The addr
+ // and command are already registered in the FIFO.
+ assign af_addr_r = af_addr;
+ assign af_cmd_r = af_cmd;
+
+ // Second register stage for the cmd & add from the FIFO.
+ // The af_valid_r1 signal gives the status of the data
+ // in this stage. The af_valid_r will be asserted when there
+ // is valid data. This register stage will be updated
+ // 1. read to the FIFO and the FIFO not empty and there
+ // is no valid data on this stage
+ // 2. After write and read states
+ // 3. The valid signal is not asserted in the last stage.
+ always@(posedge clk) begin
+ if (rst_r1)begin
+ af_valid_r1 <= 1'd0;
+ af_addr_r1 <= {31{1'bx}};
+ af_cmd_r1 <= {3{1'bx}};
+ end else if (~af_valid_r1 || sm_rden_r ||
+ ~af_valid_r2) begin
+ af_valid_r1 <= af_valid_r;
+ af_addr_r1 <= af_addr_r;
+ af_cmd_r1 <= af_cmd_r;
+ end
+ end
+
+ // The state machine uses the address and command in this
+ // register stage. The data is fetched from the second
+ // register stage whenever the state machine can accept new
+ // addr. The conflict flags are also generated based on the
+ // second register stage and updated when the new address
+ // is loaded for the state machine.
+ always@(posedge clk) begin
+ if (rst_r1)begin
+ af_valid_r2 <= 1'd0;
+ af_addr_r2 <= {31{1'bx}};
+ af_cmd_r2 <= {3{1'bx}};
+ bank_hit_r <= {OPEN_BANK_NUM{1'bx}};
+ bank_conflict_r <= 1'bx;
+ row_conflict_r <= 4'bx;
+ end else if(sm_rden || ~af_valid_r2)begin
+ af_valid_r2 <= af_valid_r1;
+ af_addr_r2 <= af_addr_r1;
+ af_cmd_r2 <= af_cmd_r1;
+ if(MULTI_BANK_EN)begin
+ bank_hit_r <= bank_hit;
+ row_conflict_r <= row_miss;
+ bank_conflict_r <= (~(|bank_hit));
+ end else begin
+ bank_hit_r <= {OPEN_BANK_NUM{1'b0}};
+ bank_conflict_r <= 1'd0;
+ row_conflict_r[0] <= (af_addr_r1[CS_RANGE_END:ROW_RANGE_START]
+ != sb_open_add_r[CMP_WIDTH-1:0]);
+ end
+ end
+ end // always@ (posedge clk)
+
+ //detecting cs change for multi chip select case
+ generate
+ if(CS_NUM > 1) begin: gen_cs_change
+ always @(posedge clk) begin
+ if(sm_rden || ~af_valid_r2)begin
+ cs_change_r <= af_addr_r1[CS_RANGE_END:CS_RANGE_START] !=
+ af_addr_r2[CS_RANGE_END:CS_RANGE_START] ;
+ cs_change_sticky_r <=
+ af_addr_r1[CS_RANGE_END:CS_RANGE_START] !=
+ af_addr_r2[CS_RANGE_END:CS_RANGE_START] ;
+ end else
+ cs_change_r <= 1'd0;
+ end
+ end // block: gen_cs_change
+ else begin: gen_cs_0
+ always @(posedge clk) begin
+ cs_change_r <= 1'd0;
+ cs_change_sticky_r <= 1'd0;
+ end
+ end
+ endgenerate
+
+ assign conflict_detect = (MULTI_BANK_EN) ?
+ ((|(row_conflict_r[3:0] & bank_hit_r[3:0]))
+ | bank_conflict_r) & af_valid_r2 :
+ row_conflict_r[0] & af_valid_r2;
+
+ always @(posedge clk) begin
+ conflict_detect_r <= conflict_detect;
+ sm_rden_r <= sm_rden;
+ af_addr_r3 <= af_addr_r2;
+ ctrl_af_rden_r <= ctrl_af_rden & ~af_empty;
+ end
+
+ // conflict resolved signal. When this signal is asserted
+ // the conflict is resolved. The address to be compared
+ // for the conflict_resolved_r will be stored in act_add_r
+ // when the bank is opened.
+ always @(posedge clk) begin
+ conflict_resolved_r <= (act_addr_r ==
+ af_addr_r2[CS_RANGE_END:ROW_RANGE_START]);
+ if((state_r == CTRL_ACTIVE))
+ act_addr_r <= af_addr_r2[CS_RANGE_END:ROW_RANGE_START];
+ end
+
+ //***************************************************************************
+ // Bank management logic
+ // Semi-hardcoded for now for 4 banks
+ // will keep multiple banks open if MULTI_BANK_EN is true.
+ //***************************************************************************
+
+ genvar bank_i;
+ generate // if multiple bank option chosen
+ if(MULTI_BANK_EN) begin: gen_multi_bank_open
+
+ for (bank_i = 0; bank_i < OPEN_BANK_NUM;
+ bank_i = bank_i + 1) begin: gen_bank_hit1
+ // asserted if bank address match + open bank entry is valid
+ always @(*) begin
+ bank_hit[bank_i]
+ = ((bank_cmp_addr_r[(CMP_WIDTH*(bank_i+1))-1:
+ (CMP_WIDTH*bank_i)+ROW_WIDTH] ==
+ af_addr_r1[CS_RANGE_END:BANK_RANGE_START]) &&
+ bank_valid_r[bank_i]);
+ // asserted if row address match (no check for bank entry valid, rely
+ // on this term to be used in conjunction with BANK_HIT[])
+ row_miss[bank_i]
+ = (bank_cmp_addr_r[(CMP_WIDTH*bank_i)+ROW_WIDTH-1:
+ (CMP_WIDTH*bank_i)] !=
+ af_addr_r1[ROW_RANGE_END:ROW_RANGE_START]);
+ end
+ end
+
+ always @(posedge clk) begin
+ no_precharge_wait_r <= bank_valid_r[3] & bank_conflict_r;
+ bank_hit_r1 <= bank_hit_r;
+ end
+
+ always@(*)
+ no_precharge_r = ~bank_valid_r[3] & bank_conflict_r;
+
+ always@(posedge clk)
+ no_precharge_r1 <= no_precharge_r;
+
+
+ always @(posedge clk) begin
+ // Clear all bank valid bits during AR (i.e. since all banks get
+ // precharged during auto-refresh)
+ if ((state_r1 == CTRL_AUTO_REFRESH)) begin
+ bank_valid_r <= {(OPEN_BANK_NUM-1){1'b0}};
+ bank_cmp_addr_r <= {(OPEN_BANK_NUM*CMP_WIDTH-1){1'b0}};
+ end else begin
+ if (state_r1 == CTRL_ACTIVE) begin
+ // 00 is always going to have the latest bank and row.
+ bank_cmp_addr_r[CMP_WIDTH-1:0]
+ <= af_addr_r3[CS_RANGE_END:ROW_RANGE_START];
+ // This indicates the bank was activated
+ bank_valid_r[0] <= 1'b1;
+
+ case ({bank_hit_r1[2:0]})
+ 3'b001: begin
+ bank_cmp_addr_r[CMP_WIDTH-1:0]
+ <= af_addr_r3[CS_RANGE_END:ROW_RANGE_START];
+ // This indicates the bank was activated
+ bank_valid_r[0] <= 1'b1;
+ end
+ 3'b010: begin //(b0->b1)
+ bank_cmp_addr_r[(2*CMP_WIDTH)-1:CMP_WIDTH]
+ <= bank_cmp_addr_r[CMP_WIDTH-1:0];
+ bank_valid_r[1] <= bank_valid_r[0];
+ end
+ 3'b100:begin //(b0->b1, b1->b2)
+ bank_cmp_addr_r[(2*CMP_WIDTH)-1:CMP_WIDTH]
+ <= bank_cmp_addr_r[CMP_WIDTH-1:0];
+ bank_cmp_addr_r[(3*CMP_WIDTH)-1:2*CMP_WIDTH]
+ <= bank_cmp_addr_r[(2*CMP_WIDTH)-1:CMP_WIDTH];
+ bank_valid_r[1] <= bank_valid_r[0];
+ bank_valid_r[2] <= bank_valid_r[1];
+ end
+ default: begin //(b0->b1, b1->b2, b2->b3)
+ bank_cmp_addr_r[(2*CMP_WIDTH)-1:CMP_WIDTH]
+ <= bank_cmp_addr_r[CMP_WIDTH-1:0];
+ bank_cmp_addr_r[(3*CMP_WIDTH)-1:2*CMP_WIDTH]
+ <= bank_cmp_addr_r[(2*CMP_WIDTH)-1:CMP_WIDTH];
+ bank_cmp_addr_r[(4*CMP_WIDTH)-1:3*CMP_WIDTH]
+ <= bank_cmp_addr_r[(3*CMP_WIDTH)-1:2*CMP_WIDTH];
+ bank_valid_r[1] <= bank_valid_r[0];
+ bank_valid_r[2] <= bank_valid_r[1];
+ bank_valid_r[3] <= bank_valid_r[2];
+ end
+ endcase
+ end
+ end
+ end
+ end else begin: gen_single_bank_open // single bank option
+ always @(posedge clk) begin
+ no_precharge_r <= 1'd0;
+ no_precharge_r1 <= 1'd0;
+ no_precharge_wait_r <= 1'd0;
+ if (rst_r1)
+ sb_open_add_r <= {CMP_WIDTH{1'b0}};
+ else if (state_r == CTRL_ACTIVE)
+ sb_open_add_r <= af_addr_r2[CS_RANGE_END:ROW_RANGE_START];
+ end
+ end
+ endgenerate
+
+ //***************************************************************************
+ // Timing counters
+ //***************************************************************************
+
+ //*****************************************************************
+ // Write and read enable generation for PHY
+ //*****************************************************************
+
+ // write burst count. Counts from (BL/2 to 1).
+ // Also logic for controller write enable.
+ always @(posedge clk) begin
+ if (state_r == CTRL_BURST_WRITE) begin
+ wrburst_cnt_r <= BURST_LEN_DIV2;
+ end else if (wrburst_cnt_r >= 3'd1)
+ wrburst_cnt_r <= wrburst_cnt_r - 1;
+ end // always @ (posedge clk)
+
+
+ always @(posedge clk) begin
+ if (rst_r1) begin
+ ctrl_wren <= 1'b0;
+ end else if (state_r == CTRL_BURST_WRITE) begin
+ ctrl_wren <= 1'b1;
+ end else if (wrburst_wren_ok_r)
+ ctrl_wren <= 1'b0;
+ end
+
+
+ always @(posedge clk) begin
+ if ((state_r == CTRL_BURST_WRITE)
+ && (BURST_LEN_DIV2 > 2))
+ wrburst_ok_r <= 1'd0;
+ else if ((wrburst_cnt_r <= 3'd3) ||
+ (BURST_LEN_DIV2 <= 2))
+ wrburst_ok_r <= 1'b1;
+ end
+
+ // flag to check when wrburst count has reached
+ // a value of 1. This flag is used in the ctrl_wren
+ // logic
+ always @(posedge clk) begin
+ if(wrburst_cnt_r == 3'd2)
+ wrburst_wren_ok_r <=1'b1;
+ else
+ wrburst_wren_ok_r <= 1'b0;
+ end
+
+
+ // read burst count. Counts from (BL/2 to 1)
+ always @(posedge clk) begin
+ if (state_r == CTRL_BURST_READ) begin
+ rdburst_cnt_r <= BURST_LEN_DIV2;
+ end else if (rdburst_cnt_r >= 3'd1)
+ rdburst_cnt_r <= rdburst_cnt_r - 1;
+ end // always @ (posedge clk)
+
+
+ always @(posedge clk) begin
+ if (rst_r1) begin
+ ctrl_rden <= 1'b0;
+ end else if (state_r == CTRL_BURST_READ) begin
+ ctrl_rden <= 1'b1;
+ end else if (rdburst_rden_ok_r)
+ ctrl_rden <= 1'b0;
+ end
+
+ // the rd_burst_ok_r signal will be asserted one cycle later
+ // in multi chip select cases if the back to back read is to
+ // different chip selects. The cs_changed_sticky_r signal will
+ // be asserted only for multi chip select cases.
+ always @(posedge clk) begin
+ if ((state_r == CTRL_BURST_READ)
+ && (BURST_LEN_DIV2 > 2))
+ rdburst_ok_r <= 1'd0;
+ else if ((rdburst_cnt_r <=( 3'd3 - cs_change_sticky_r)) ||
+ (BURST_LEN_DIV2 <= 2))
+ rdburst_ok_r <= 1'b1;
+ end
+
+ // flag to check when rdburst count has reached
+ // a value of 1. This flag is used in the ctrl_rden
+ // logic
+ always @(posedge clk) begin
+ if (rdburst_cnt_r == 3'd2)
+ rdburst_rden_ok_r <= 1'b1;
+ else
+ rdburst_rden_ok_r <= 1'b0;
+ end
+
+
+ //*****************************************************************
+ // Various delay counters
+ // The counters are checked for value of <= 3 to determine the
+ // if the count values are reached during different commands.
+ // It is checked for 3 because
+ // 1. The counters are loaded during the state when the command
+ // state is reached (+1)
+ // 2. After the <= 3 condition is reached the sm takes two cycles
+ // to transition to the new command state (+2)
+ //*****************************************************************
+
+ // tRP count - precharge command period
+ always @(posedge clk) begin
+ if (state_r == CTRL_PRECHARGE)
+ rp_cnt_r <= TRP_COUNT;
+ else if (rp_cnt_r != 4'd0)
+ rp_cnt_r <= rp_cnt_r - 1;
+ end
+
+ always @(posedge clk) begin
+ if (state_r == CTRL_PRECHARGE)
+ rp_cnt_ok_r <= 1'd0;
+ else if (rp_cnt_r <= 4'd3)
+ rp_cnt_ok_r <= 1'd1;
+ end
+
+ // tRFC count - refresh-refresh, refresh-active
+ always @(posedge clk) begin
+ if (state_r == CTRL_AUTO_REFRESH)
+ rfc_cnt_r <= TRFC_COUNT;
+ else if (rfc_cnt_r != 8'd0)
+ rfc_cnt_r <= rfc_cnt_r - 1;
+ end
+
+ always @(posedge clk) begin
+ if (state_r == CTRL_AUTO_REFRESH)
+ rfc_ok_r <= 1'b0;
+ else if(rfc_cnt_r <= 8'd3)
+ rfc_ok_r <= 1'b1;
+ end
+
+ // tRCD count - active to read/write
+ always @(posedge clk) begin
+ if (state_r == CTRL_ACTIVE)
+ rcd_cnt_r <= TRCD_COUNT;
+ else if (rcd_cnt_r != 4'd0)
+ rcd_cnt_r <= rcd_cnt_r - 1;
+ end
+
+ always @(posedge clk) begin
+ if ((state_r == CTRL_ACTIVE)
+ && (TRCD_COUNT > 2))
+ rcd_cnt_ok_r <= 1'd0;
+ else if (rcd_cnt_r <= 4'd3)
+ rcd_cnt_ok_r <= 1;
+ end
+
+ // tRRD count - active to active
+ always @(posedge clk) begin
+ if (state_r == CTRL_ACTIVE)
+ trrd_cnt_r <= TRRD_COUNT;
+ else if (trrd_cnt_r != 3'd0)
+ trrd_cnt_r <= trrd_cnt_r - 1;
+ end
+
+ always @(posedge clk) begin
+ if (state_r == CTRL_ACTIVE)
+ trrd_cnt_ok_r <= 1'd0;
+ else if (trrd_cnt_r <= 3'd3)
+ trrd_cnt_ok_r <= 1;
+ end
+
+ // tRAS count - active to precharge
+ always @(posedge clk) begin
+ if (state_r == CTRL_ACTIVE)
+ ras_cnt_r <= TRAS_COUNT;
+ else if (ras_cnt_r != 5'd0)
+ ras_cnt_r <= ras_cnt_r - 1;
+ end
+
+ // counter for write to prcharge
+ // read to precharge and
+ // activate to precharge
+ // precharge_ok_cnt_r is added with trtp count,
+ // there can be cases where the sm can go from
+ // activate to read and the act->pre count time
+ // would not have been satisfied. The rd->pre
+ // time is very less. wr->pre time is almost the
+ // same as act-> pre
+ always @(posedge clk) begin
+ if (state_r == CTRL_BURST_READ) begin
+ // assign only if the cnt is < TRTP_COUNT
+ if (precharge_ok_cnt_r < TRTP_COUNT)
+ precharge_ok_cnt_r <= TRTP_COUNT;
+ end else if (state_r == CTRL_BURST_WRITE)
+ precharge_ok_cnt_r <= TWR_COUNT;
+ else if (state_r == CTRL_ACTIVE)
+ precharge_ok_cnt_r <= TRAS_COUNT;
+ else if (precharge_ok_cnt_r != 5'd0)
+ precharge_ok_cnt_r <= precharge_ok_cnt_r - 1;
+ end
+
+ always @(posedge clk) begin
+ if ((state_r == CTRL_BURST_READ) ||
+ (state_r == CTRL_BURST_WRITE)||
+ (state_r == CTRL_ACTIVE))
+ precharge_ok_r <= 1'd0;
+ else if(precharge_ok_cnt_r <= 5'd3)
+ precharge_ok_r <=1'd1;
+ end
+
+ // write to read counter
+ // write to read includes : write latency + burst time + tWTR
+ always @(posedge clk) begin
+ if (rst_r1)
+ wr_to_rd_cnt_r <= 5'd0;
+ else if (state_r == CTRL_BURST_WRITE)
+ wr_to_rd_cnt_r <= (TWTR_COUNT);
+ else if (wr_to_rd_cnt_r != 5'd0)
+ wr_to_rd_cnt_r <= wr_to_rd_cnt_r - 1;
+ end
+
+ always @(posedge clk) begin
+ if (state_r == CTRL_BURST_WRITE)
+ wr_to_rd_ok_r <= 1'd0;
+ else if (wr_to_rd_cnt_r <= 5'd3)
+ wr_to_rd_ok_r <= 1'd1;
+ end
+
+ // read to write counter
+ always @(posedge clk) begin
+ if (rst_r1)
+ rd_to_wr_cnt_r <= 5'd0;
+ else if (state_r == CTRL_BURST_READ)
+ rd_to_wr_cnt_r <= (TRTW_COUNT);
+ else if (rd_to_wr_cnt_r != 5'd0)
+ rd_to_wr_cnt_r <= rd_to_wr_cnt_r - 1;
+ end
+
+ always @(posedge clk) begin
+ if (state_r == CTRL_BURST_READ)
+ rd_to_wr_ok_r <= 1'b0;
+ else if (rd_to_wr_cnt_r <= 5'd3)
+ rd_to_wr_ok_r <= 1'b1;
+ end
+
+ always @(posedge clk) begin
+ if(refi_cnt_r == (TREFI_COUNT -1))
+ refi_cnt_ok_r <= 1'b1;
+ else
+ refi_cnt_ok_r <= 1'b0;
+ end
+
+ // auto refresh interval counter in refresh_clk domain
+ always @(posedge clk) begin
+ if ((rst_r1) || (refi_cnt_ok_r)) begin
+ refi_cnt_r <= 12'd0;
+ end else begin
+ refi_cnt_r <= refi_cnt_r + 1;
+ end
+ end // always @ (posedge clk)
+
+ // auto refresh flag
+ always @(posedge clk) begin
+ if (refi_cnt_ok_r) begin
+ ref_flag_r <= 1'b1;
+ end else begin
+ ref_flag_r <= 1'b0;
+ end
+ end // always @ (posedge clk)
+
+ assign ctrl_ref_flag = ref_flag_r;
+
+ //refresh flag detect
+ //auto_ref high indicates auto_refresh requirement
+ //auto_ref is held high until auto refresh command is issued.
+ always @(posedge clk)begin
+ if (rst_r1)
+ auto_ref_r <= 1'b0;
+ else if (ref_flag_r)
+ auto_ref_r <= 1'b1;
+ else if (state_r == CTRL_AUTO_REFRESH)
+ auto_ref_r <= 1'b0;
+ end
+
+
+ // keep track of which chip selects got auto-refreshed (avoid auto-refreshing
+ // all CS's at once to avoid current spike)
+ always @(posedge clk)begin
+ if (rst_r1 || (state_r1 == CTRL_PRECHARGE))
+ auto_cnt_r <= 'd0;
+ else if (state_r1 == CTRL_AUTO_REFRESH)
+ auto_cnt_r <= auto_cnt_r + 1;
+ end
+
+ // register for timing purposes. Extra delay doesn't really matter
+ always @(posedge clk)
+ phy_init_done_r <= phy_init_done;
+
+ always @(posedge clk)begin
+ if (rst_r1) begin
+ state_r <= CTRL_IDLE;
+ state_r1 <= CTRL_IDLE;
+ end else begin
+ state_r <= next_state;
+ state_r1 <= state_r;
+ end
+ end
+
+ //***************************************************************************
+ // main control state machine
+ //***************************************************************************
+
+ always @(*) begin
+ next_state = state_r;
+ wr_fifo_burst = 1'b0;
+
+ (* full_case, parallel_case *) case (state_r)
+ CTRL_IDLE: begin
+ // perform auto refresh as soon as we are done with calibration.
+ // The calibration logic does not do any refreshes.
+ if (phy_init_done_r)
+ next_state = CTRL_AUTO_REFRESH;
+ end
+
+ CTRL_PRECHARGE: begin
+ if (auto_ref_r)
+ next_state = CTRL_PRECHARGE_WAIT1;
+ // when precharging an LRU bank, do not have to go to wait state
+ // since we can't possibly be activating row in same bank next
+ // disabled for 2t timing. There needs to be a gap between cmds
+ // in 2t timing
+ else if (no_precharge_wait_r && !TWO_T_TIME_EN)
+ next_state = CTRL_ACTIVE;
+ else
+ next_state = CTRL_PRECHARGE_WAIT;
+ end
+
+ CTRL_PRECHARGE_WAIT:begin
+ if (rp_cnt_ok_r)begin
+ if (auto_ref_r)
+ // precharge again to make sure we close all the banks
+ next_state = CTRL_PRECHARGE;
+ else
+ next_state = CTRL_ACTIVE;
+ end
+ end
+
+ CTRL_PRECHARGE_WAIT1:
+ if (rp_cnt_ok_r)
+ next_state = CTRL_AUTO_REFRESH;
+
+ CTRL_AUTO_REFRESH:
+ next_state = CTRL_AUTO_REFRESH_WAIT;
+
+ CTRL_AUTO_REFRESH_WAIT:
+ //staggering Auto refresh for multi
+ // chip select designs. The SM waits
+ // for the rfc time before issuing the
+ // next auto refresh.
+ if (auto_cnt_r < (CS_NUM))begin
+ if (rfc_ok_r )
+ next_state = CTRL_AUTO_REFRESH;
+ end else if (rfc_ok_r)begin
+ if(auto_ref_r)
+ // MIG 2.3: For deep designs if Auto Refresh
+ // flag asserted immediately after calibration is completed
+ next_state = CTRL_PRECHARGE;
+ else if ( wr_flag || rd_flag)
+ next_state = CTRL_ACTIVE;
+ end
+
+ CTRL_ACTIVE:
+ next_state = CTRL_ACTIVE_WAIT;
+
+ CTRL_ACTIVE_WAIT: begin
+ if (rcd_cnt_ok_r) begin
+ if ((conflict_detect_r && ~conflict_resolved_r) ||
+ auto_ref_r) begin
+ if (no_precharge_r1 && ~auto_ref_r && trrd_cnt_ok_r)
+ next_state = CTRL_ACTIVE;
+ else if(precharge_ok_r)
+ next_state = CTRL_PRECHARGE;
+ end else if ((wr_flag_r) && (rd_to_wr_ok_r) && wr_fifo_clear) begin
+ next_state = CTRL_BURST_WRITE;
+ wr_fifo_burst = 1'b1;
+ end else if ((rd_flag_r)&& (wr_to_rd_ok_r) && rd_fifo_clear)
+ next_state = CTRL_BURST_READ;
+ end
+ end
+
+ // beginning of write burst
+ CTRL_BURST_WRITE: begin
+ if (BURST_LEN_DIV2 == 1) begin
+ // special case if BL = 2 (i.e. burst lasts only one clk cycle)
+ if (wr_flag && wr_fifo_clear) begin
+ // if we have another non-conflict write command right after the
+ // current write, then stay in this state
+ next_state = CTRL_BURST_WRITE;
+ wr_fifo_burst = 1'b1;
+ end else
+ // otherwise, if we're done with this burst, and have no write
+ // immediately scheduled after this one, wait until write-read
+ // delay has passed
+ next_state = CTRL_WRITE_WAIT;
+ end else
+ // otherwise BL > 2, and we have at least one more write cycle for
+ // current burst
+ next_state = CTRL_WRITE_WAIT;
+ // continuation of write burst (also covers waiting after write burst
+ // has completed for write-read delay to pass)
+ end
+
+ CTRL_WRITE_WAIT: begin
+ if ((conflict_detect) || auto_ref_r) begin
+ if (no_precharge_r && ~auto_ref_r && wrburst_ok_r)
+ next_state = CTRL_ACTIVE;
+ else if (precharge_ok_r)
+ next_state = CTRL_PRECHARGE;
+ end else if (wrburst_ok_r && wr_flag && wr_fifo_clear) begin
+ next_state = CTRL_BURST_WRITE;
+ wr_fifo_burst = 1'b1;
+ end else if ((rd_flag) && (wr_to_rd_ok_r) && rd_fifo_clear)
+ next_state = CTRL_BURST_READ;
+ end
+
+ CTRL_BURST_READ: begin
+ if (BURST_LEN_DIV2 == 1) begin
+ // special case if BL = 2 (i.e. burst lasts only one clk cycle)
+ if (rd_flag && rd_fifo_clear)
+ next_state = CTRL_BURST_READ;
+ else
+ next_state = CTRL_READ_WAIT;
+ end else
+ next_state = CTRL_READ_WAIT;
+ end
+
+ CTRL_READ_WAIT: begin
+ if ((conflict_detect) || auto_ref_r)begin
+ if (no_precharge_r && ~auto_ref_r && rdburst_ok_r)
+ next_state = CTRL_ACTIVE;
+ else if (precharge_ok_r)
+ next_state = CTRL_PRECHARGE;
+ // for burst of 4 in multi chip select
+ // if there is a change in cs wait one cycle before the
+ // next read command. cs_change_r will be asserted.
+ end else if (rdburst_ok_r && rd_flag && ~cs_change_r && rd_fifo_clear)
+ next_state = CTRL_BURST_READ;
+ else if (wr_flag && (rd_to_wr_ok_r) && wr_fifo_clear) begin
+ next_state = CTRL_BURST_WRITE;
+ wr_fifo_burst = 1'b1;
+ end
+ end
+ endcase
+ end
+
+ //***************************************************************************
+ // control signals to memory
+ //***************************************************************************
+
+ always @(posedge clk) begin
+ if ((state_r == CTRL_AUTO_REFRESH) ||
+ (state_r == CTRL_ACTIVE) ||
+ (state_r == CTRL_PRECHARGE)) begin
+ ddr_ras_n_r <= 1'b0;
+ two_t_enable_r[0] <= 1'b0;
+ end else begin
+ if (TWO_T_TIME_EN)
+ ddr_ras_n_r <= two_t_enable_r[0] ;
+ else
+ ddr_ras_n_r <= 1'd1;
+ two_t_enable_r[0] <= 1'b1;
+ end
+ end
+
+ always @(posedge clk)begin
+ if ((state_r == CTRL_BURST_WRITE) ||
+ (state_r == CTRL_BURST_READ) ||
+ (state_r == CTRL_AUTO_REFRESH)) begin
+ ddr_cas_n_r <= 1'b0;
+ two_t_enable_r[1] <= 1'b0;
+ end else begin
+ if (TWO_T_TIME_EN)
+ ddr_cas_n_r <= two_t_enable_r[1];
+ else
+ ddr_cas_n_r <= 1'b1;
+ two_t_enable_r[1] <= 1'b1;
+ end
+ end
+
+ always @(posedge clk) begin
+ if ((state_r == CTRL_BURST_WRITE) ||
+ (state_r == CTRL_PRECHARGE)) begin
+ ddr_we_n_r <= 1'b0;
+ two_t_enable_r[2] <= 1'b0;
+ end else begin
+ if(TWO_T_TIME_EN)
+ ddr_we_n_r <= two_t_enable_r[2];
+ else
+ ddr_we_n_r <= 1'b1;
+ two_t_enable_r[2] <= 1'b1;
+ end
+ end
+
+ // turn off auto-precharge when issuing commands (A10 = 0)
+ // mapping the col add for linear addressing.
+ generate
+ if (TWO_T_TIME_EN) begin: gen_addr_col_two_t
+ if (COL_WIDTH == ROW_WIDTH-1) begin: gen_ddr_addr_col_0
+ assign ddr_addr_col = {af_addr_r3[COL_WIDTH-1:10], 1'b0,
+ af_addr_r3[9:0]};
+ end else begin
+ if (COL_WIDTH > 10) begin: gen_ddr_addr_col_1
+ assign ddr_addr_col = {{(ROW_WIDTH-COL_WIDTH-1){1'b0}},
+ af_addr_r3[COL_WIDTH-1:10], 1'b0,
+ af_addr_r3[9:0]};
+ end else begin: gen_ddr_addr_col_2
+ assign ddr_addr_col = {{(ROW_WIDTH-COL_WIDTH-1){1'b0}}, 1'b0,
+ af_addr_r3[COL_WIDTH-1:0]};
+ end
+ end
+ end else begin: gen_addr_col_one_t
+ if (COL_WIDTH == ROW_WIDTH-1) begin: gen_ddr_addr_col_0_1
+ assign ddr_addr_col = {af_addr_r2[COL_WIDTH-1:10], 1'b0,
+ af_addr_r2[9:0]};
+ end else begin
+ if (COL_WIDTH > 10) begin: gen_ddr_addr_col_1_1
+ assign ddr_addr_col = {{(ROW_WIDTH-COL_WIDTH-1){1'b0}},
+ af_addr_r2[COL_WIDTH-1:10], 1'b0,
+ af_addr_r2[9:0]};
+ end else begin: gen_ddr_addr_col_2_1
+ assign ddr_addr_col = {{(ROW_WIDTH-COL_WIDTH-1){1'b0}}, 1'b0,
+ af_addr_r2[COL_WIDTH-1:0]};
+ end
+ end
+ end
+ endgenerate
+
+ // Assign address during row activate
+ generate
+ if (TWO_T_TIME_EN)
+ assign ddr_addr_row = af_addr_r3[ROW_RANGE_END:ROW_RANGE_START];
+ else
+ assign ddr_addr_row = af_addr_r2[ROW_RANGE_END:ROW_RANGE_START];
+ endgenerate
+
+
+ always @(posedge clk)begin
+ if ((state_r == CTRL_ACTIVE) ||
+ ((state_r1 == CTRL_ACTIVE) && TWO_T_TIME_EN))
+ ddr_addr_r <= ddr_addr_row;
+ else if ((state_r == CTRL_BURST_WRITE) ||
+ (state_r == CTRL_BURST_READ) ||
+ (((state_r1 == CTRL_BURST_WRITE) ||
+ (state_r1 == CTRL_BURST_READ)) &&
+ TWO_T_TIME_EN))
+ ddr_addr_r <= ddr_addr_col;
+ else if (((state_r == CTRL_PRECHARGE) ||
+ ((state_r1 == CTRL_PRECHARGE) && TWO_T_TIME_EN))
+ && auto_ref_r) begin
+ // if we're precharging as a result of AUTO-REFRESH, precharge all banks
+ ddr_addr_r <= {ROW_WIDTH{1'b0}};
+ ddr_addr_r[10] <= 1'b1;
+ end else if ((state_r == CTRL_PRECHARGE) ||
+ ((state_r1 == CTRL_PRECHARGE) && TWO_T_TIME_EN))
+ // if we're precharging to close a specific bank/row, set A10=0
+ ddr_addr_r <= {ROW_WIDTH{1'b0}};
+ else
+ ddr_addr_r <= {ROW_WIDTH{1'bx}};
+ end
+
+ always @(posedge clk)begin
+ // whenever we're precharging, we're either: (1) precharging all banks (in
+ // which case banks bits are don't care, (2) precharging the LRU bank,
+ // b/c we've exceeded the limit of # of banks open (need to close the LRU
+ // bank to make room for a new one), (3) we haven't exceed the maximum #
+ // of banks open, but we trying to open a different row in a bank that's
+ // already open
+ if (((state_r == CTRL_PRECHARGE) ||
+ ((state_r1 == CTRL_PRECHARGE) && TWO_T_TIME_EN)) &&
+ bank_conflict_r && MULTI_BANK_EN)
+ // When LRU bank needs to be closed
+ ddr_ba_r <= bank_cmp_addr_r[(3*CMP_WIDTH)+CMP_BANK_RANGE_END:
+ (3*CMP_WIDTH)+CMP_BANK_RANGE_START];
+ else begin
+ // Either precharge due to refresh or bank hit case
+ if (TWO_T_TIME_EN)
+ ddr_ba_r <= af_addr_r3[BANK_RANGE_END:BANK_RANGE_START];
+ else
+ ddr_ba_r <= af_addr_r2[BANK_RANGE_END:BANK_RANGE_START];
+ end
+ end
+
+ // chip enable generation logic
+ generate
+ // if only one chip select, always assert it after reset
+ if (CS_BITS == 0) begin: gen_ddr_cs_0
+ always @(posedge clk)
+ if (rst_r1)
+ ddr_cs_n_r[0] <= 1'b1;
+ else
+ ddr_cs_n_r[0] <= 1'b0;
+ // otherwise if we have multiple chip selects
+ end else begin: gen_ddr_cs_1
+ if(TWO_T_TIME_EN) begin: gen_2t_cs
+ always @(posedge clk)
+ if (rst_r1)
+ ddr_cs_n_r <= {CS_NUM{1'b1}};
+ else if ((state_r1 == CTRL_AUTO_REFRESH)) begin
+ // if auto-refreshing, only auto-refresh one CS at any time (avoid
+ // beating on the ground plane by refreshing all CS's at same time)
+ ddr_cs_n_r <= {CS_NUM{1'b1}};
+ ddr_cs_n_r[auto_cnt_r] <= 1'b0;
+ end else if (auto_ref_r && (state_r1 == CTRL_PRECHARGE)) begin
+ ddr_cs_n_r <= {CS_NUM{1'b0}};
+ end else if ((state_r1 == CTRL_PRECHARGE) && ( bank_conflict_r
+ && MULTI_BANK_EN))begin
+ // precharging the LRU bank
+ ddr_cs_n_r <= {CS_NUM{1'b1}};
+ ddr_cs_n_r[bank_cmp_addr_r[(3*CMP_WIDTH)+CMP_CS_RANGE_END:
+ (3*CMP_WIDTH)+CMP_CS_RANGE_START]] <= 1'b0;
+ end else begin
+ // otherwise, check the upper address bits to see which CS to assert
+ ddr_cs_n_r <= {CS_NUM{1'b1}};
+ ddr_cs_n_r[af_addr_r3[CS_RANGE_END:CS_RANGE_START]] <= 1'b0;
+ end // else: !if(((state_r == CTRL_PRECHARGE) ||...
+ end else begin: gen_1t_cs // block: gen_2t_cs
+ always @(posedge clk)
+ if (rst_r1)
+ ddr_cs_n_r <= {CS_NUM{1'b1}};
+ else if ((state_r == CTRL_AUTO_REFRESH) ) begin
+ // if auto-refreshing, only auto-refresh one CS at any time (avoid
+ // beating on the ground plane by refreshing all CS's at same time)
+ ddr_cs_n_r <= {CS_NUM{1'b1}};
+ ddr_cs_n_r[auto_cnt_r] <= 1'b0;
+ end else if (auto_ref_r && (state_r == CTRL_PRECHARGE) ) begin
+ ddr_cs_n_r <= {CS_NUM{1'b0}};
+ end else if ((state_r == CTRL_PRECHARGE) &&
+ (bank_conflict_r && MULTI_BANK_EN))begin
+ // precharging the LRU bank
+ ddr_cs_n_r <= {CS_NUM{1'b1}};
+ ddr_cs_n_r[bank_cmp_addr_r[(3*CMP_WIDTH)+CMP_CS_RANGE_END:
+ (3*CMP_WIDTH)+CMP_CS_RANGE_START]] <= 1'b0;
+ end else begin
+ // otherwise, check the upper address bits to see which CS to assert
+ ddr_cs_n_r <= {CS_NUM{1'b1}};
+ ddr_cs_n_r[af_addr_r2[CS_RANGE_END:CS_RANGE_START]] <= 1'b0;
+ end // else: !if(((state_r == CTRL_PRECHARGE) ||...
+ end // block: gen_1t_cs
+ end
+ endgenerate
+
+ // registring the two_t timing enable signal.
+ // This signal will be asserted (low) when the
+ // chip select has to be asserted.
+ always @(posedge clk)begin
+ if(&two_t_enable_r)
+ two_t_enable_r1 <= {CS_NUM{1'b1}};
+ else
+ two_t_enable_r1 <= {CS_NUM{1'b0}};
+ end
+
+ assign ctrl_addr = ddr_addr_r;
+ assign ctrl_ba = ddr_ba_r;
+ assign ctrl_ras_n = ddr_ras_n_r;
+ assign ctrl_cas_n = ddr_cas_n_r;
+ assign ctrl_we_n = ddr_we_n_r;
+ assign ctrl_cs_n = (TWO_T_TIME_EN) ?
+ (ddr_cs_n_r | two_t_enable_r1) :
+ ddr_cs_n_r;
+
+endmodule
+
--- /dev/null
+//*****************************************************************************
+// DISCLAIMER OF LIABILITY
+//
+// This text/file contains proprietary, confidential
+// information of Xilinx, Inc., is distributed under license
+// from Xilinx, Inc., and may be used, copied and/or
+// disclosed only pursuant to the terms of a valid license
+// agreement with Xilinx, Inc. Xilinx hereby grants you a
+// license to use this text/file solely for design, simulation,
+// implementation and creation of design files limited
+// to Xilinx devices or technologies. Use with non-Xilinx
+// devices or technologies is expressly prohibited and
+// immediately terminates your license unless covered by
+// a separate agreement.
+//
+// Xilinx is providing this design, code, or information
+// "as-is" solely for use in developing programs and
+// solutions for Xilinx devices, with no obligation on the
+// part of Xilinx to provide support. By providing this design,
+// code, or information as one possible implementation of
+// this feature, application or standard, Xilinx is making no
+// representation that this implementation is free from any
+// claims of infringement. You are responsible for
+// obtaining any rights you may require for your implementation.
+// Xilinx expressly disclaims any warranty whatsoever with
+// respect to the adequacy of the implementation, including
+// but not limited to any warranties or representations that this
+// implementation is free from claims of infringement, implied
+// warranties of merchantability or fitness for a particular
+// purpose.
+//
+// Xilinx products are not intended for use in life support
+// appliances, devices, or systems. Use in such applications is
+// expressly prohibited.
+//
+// Any modifications that are made to the Source Code are
+// done at the user\92s sole risk and will be unsupported.
+//
+// Copyright (c) 2006-2007 Xilinx, Inc. All rights reserved.
+//
+// This copyright and support notice must be retained as part
+// of this text at all times.
+//*****************************************************************************
+// ____ ____
+// / /\/ /
+// /___/ \ / Vendor: Xilinx
+// \ \ \/ Version: 2.3
+// \ \ Application: MIG
+// / / Filename: ddr2_idelay_ctrl.v
+// /___/ /\ Date Last Modified: $Date: 2008/05/08 15:20:47 $
+// \ \ / \ Date Created: Wed Aug 16 2006
+// \___\/\___\
+//
+//Device: Virtex-5
+//Design Name: DDR2
+//Purpose:
+// This module instantiates the IDELAYCTRL primitive of the Virtex-5 device
+// which continuously calibrates the IDELAY elements in the region in case of
+// varying operating conditions. It takes a 200MHz clock as an input
+//Reference:
+//Revision History:
+//*****************************************************************************
+
+`timescale 1ns/1ps
+
+module ddr2_idelay_ctrl #
+ (
+ // Following parameters are for 72-bit RDIMM design (for ML561 Reference
+ // board design). Actual values may be different. Actual parameters values
+ // are passed from design top module ddr2_sdram module. Please refer to
+ // the ddr2_sdram module for actual values.
+ parameter IDELAYCTRL_NUM = 4
+ )
+
+ (
+ input clk200,
+ input rst200,
+ output idelay_ctrl_rdy
+ );
+
+wire [IDELAYCTRL_NUM-1 : 0] idelay_ctrl_rdy_i;
+
+genvar bnk_i;
+generate
+for(bnk_i=0; bnk_i<IDELAYCTRL_NUM; bnk_i=bnk_i+1)begin : IDELAYCTRL_INST
+IDELAYCTRL u_idelayctrl
+ (
+ .RDY(idelay_ctrl_rdy_i[bnk_i]),
+ .REFCLK(clk200),
+ .RST(rst200)
+ );
+end
+endgenerate
+
+assign idelay_ctrl_rdy = &idelay_ctrl_rdy_i;
+
+endmodule
--- /dev/null
+//*****************************************************************************
+// DISCLAIMER OF LIABILITY
+//
+// This text/file contains proprietary, confidential
+// information of Xilinx, Inc., is distributed under license
+// from Xilinx, Inc., and may be used, copied and/or
+// disclosed only pursuant to the terms of a valid license
+// agreement with Xilinx, Inc. Xilinx hereby grants you a
+// license to use this text/file solely for design, simulation,
+// implementation and creation of design files limited
+// to Xilinx devices or technologies. Use with non-Xilinx
+// devices or technologies is expressly prohibited and
+// immediately terminates your license unless covered by
+// a separate agreement.
+//
+// Xilinx is providing this design, code, or information
+// "as-is" solely for use in developing programs and
+// solutions for Xilinx devices, with no obligation on the
+// part of Xilinx to provide support. By providing this design,
+// code, or information as one possible implementation of
+// this feature, application or standard, Xilinx is making no
+// representation that this implementation is free from any
+// claims of infringement. You are responsible for
+// obtaining any rights you may require for your implementation.
+// Xilinx expressly disclaims any warranty whatsoever with
+// respect to the adequacy of the implementation, including
+// but not limited to any warranties or representations that this
+// implementation is free from claims of infringement, implied
+// warranties of merchantability or fitness for a particular
+// purpose.
+//
+// Xilinx products are not intended for use in life support
+// appliances, devices, or systems. Use in such applications is
+// expressly prohibited.
+//
+// Any modifications that are made to the Source Code are
+// done at the user\92s sole risk and will be unsupported.
+//
+// Copyright (c) 2006-2007 Xilinx, Inc. All rights reserved.
+//
+// This copyright and support notice must be retained as part
+// of this text at all times.
+//*****************************************************************************
+// ____ ____
+// / /\/ /
+// /___/ \ / Vendor: Xilinx
+// \ \ \/ Version: 2.3
+// \ \ Application: MIG
+// / / Filename: ddr2_infrastructure.v
+// /___/ /\ Date Last Modified: $Date: 2008/05/08 15:20:47 $
+// \ \ / \ Date Created: Wed Aug 16 2006
+// \___\/\___\
+//
+//Device: Virtex-5
+//Design Name: DDR2
+//Purpose:
+// Clock distribution and reset synchronization
+//Reference:
+//Revision History:
+//*****************************************************************************
+
+`timescale 1ns/1ps
+
+module ddr2_infrastructure #
+ (
+ parameter RST_ACT_LOW = 1
+ )
+ (
+ input clk0,
+ input clk90,
+ input clk200,
+ input clkdiv0,
+ input dcm_lock,
+ input sys_rst_n,
+ input idelay_ctrl_rdy,
+ output rst0,
+ output rst90,
+ output rst200,
+ output rstdiv0
+ );
+
+ // # of clock cycles to delay deassertion of reset. Needs to be a fairly
+ // high number not so much for metastability protection, but to give time
+ // for reset (i.e. stable clock cycles) to propagate through all state
+ // machines and to all control signals (i.e. not all control signals have
+ // resets, instead they rely on base state logic being reset, and the effect
+ // of that reset propagating through the logic). Need this because we may not
+ // be getting stable clock cycles while reset asserted (i.e. since reset
+ // depends on DCM lock status)
+ localparam RST_SYNC_NUM = 25;
+
+ reg [RST_SYNC_NUM-1:0] rst0_sync_r /* synthesis syn_maxfan = 10 */;
+ reg [RST_SYNC_NUM-1:0] rst200_sync_r /* synthesis syn_maxfan = 10 */;
+ reg [RST_SYNC_NUM-1:0] rst90_sync_r /* synthesis syn_maxfan = 10 */;
+ reg [(RST_SYNC_NUM/2)-1:0] rstdiv0_sync_r /* synthesis syn_maxfan = 10 */;
+ wire rst_tmp;
+ wire sys_clk_ibufg;
+ wire sys_rst;
+
+ assign sys_rst = RST_ACT_LOW ? ~sys_rst_n: sys_rst_n;
+
+
+
+ //***************************************************************************
+ // Reset synchronization
+ // NOTES:
+ // 1. shut down the whole operation if the DCM hasn't yet locked (and by
+ // inference, this means that external SYS_RST_IN has been asserted -
+ // DCM deasserts DCM_LOCK as soon as SYS_RST_IN asserted)
+ // 2. In the case of all resets except rst200, also assert reset if the
+ // IDELAY master controller is not yet ready
+ // 3. asynchronously assert reset. This was we can assert reset even if
+ // there is no clock (needed for things like 3-stating output buffers).
+ // reset deassertion is synchronous.
+ //***************************************************************************
+
+ assign rst_tmp = sys_rst | ~dcm_lock | ~idelay_ctrl_rdy;
+
+ // synthesis attribute max_fanout of rst0_sync_r is 10
+ always @(posedge clk0 or posedge rst_tmp)
+ if (rst_tmp)
+ rst0_sync_r <= {RST_SYNC_NUM{1'b1}};
+ else
+ // logical left shift by one (pads with 0)
+ rst0_sync_r <= rst0_sync_r << 1;
+
+ // synthesis attribute max_fanout of rstdiv0_sync_r is 10
+ always @(posedge clkdiv0 or posedge rst_tmp)
+ if (rst_tmp)
+ rstdiv0_sync_r <= {(RST_SYNC_NUM/2){1'b1}};
+ else
+ // logical left shift by one (pads with 0)
+ rstdiv0_sync_r <= rstdiv0_sync_r << 1;
+
+ // synthesis attribute max_fanout of rst90_sync_r is 10
+ always @(posedge clk90 or posedge rst_tmp)
+ if (rst_tmp)
+ rst90_sync_r <= {RST_SYNC_NUM{1'b1}};
+ else
+ rst90_sync_r <= rst90_sync_r << 1;
+
+ // make sure CLK200 doesn't depend on IDELAY_CTRL_RDY, else chicken n' egg
+ // synthesis attribute max_fanout of rst200_sync_r is 10
+ always @(posedge clk200 or negedge dcm_lock)
+ if (!dcm_lock)
+ rst200_sync_r <= {RST_SYNC_NUM{1'b1}};
+ else
+ rst200_sync_r <= rst200_sync_r << 1;
+
+
+ assign rst0 = rst0_sync_r[RST_SYNC_NUM-1];
+ assign rst90 = rst90_sync_r[RST_SYNC_NUM-1];
+ assign rst200 = rst200_sync_r[RST_SYNC_NUM-1];
+ assign rstdiv0 = rstdiv0_sync_r[(RST_SYNC_NUM/2)-1];
+
+endmodule
--- /dev/null
+//*****************************************************************************
+// DISCLAIMER OF LIABILITY
+//
+// This text/file contains proprietary, confidential
+// information of Xilinx, Inc., is distributed under license
+// from Xilinx, Inc., and may be used, copied and/or
+// disclosed only pursuant to the terms of a valid license
+// agreement with Xilinx, Inc. Xilinx hereby grants you a
+// license to use this text/file solely for design, simulation,
+// implementation and creation of design files limited
+// to Xilinx devices or technologies. Use with non-Xilinx
+// devices or technologies is expressly prohibited and
+// immediately terminates your license unless covered by
+// a separate agreement.
+//
+// Xilinx is providing this design, code, or information
+// "as-is" solely for use in developing programs and
+// solutions for Xilinx devices, with no obligation on the
+// part of Xilinx to provide support. By providing this design,
+// code, or information as one possible implementation of
+// this feature, application or standard, Xilinx is making no
+// representation that this implementation is free from any
+// claims of infringement. You are responsible for
+// obtaining any rights you may require for your implementation.
+// Xilinx expressly disclaims any warranty whatsoever with
+// respect to the adequacy of the implementation, including
+// but not limited to any warranties or representations that this
+// implementation is free from claims of infringement, implied
+// warranties of merchantability or fitness for a particular
+// purpose.
+//
+// Xilinx products are not intended for use in life support
+// appliances, devices, or systems. Use in such applications is
+// expressly prohibited.
+//
+// Any modifications that are made to the Source Code are
+// done at the user�s sole risk and will be unsupported.
+//
+// Copyright (c) 2006-2007 Xilinx, Inc. All rights reserved.
+//
+// This copyright and support notice must be retained as part
+// of this text at all times.
+//*****************************************************************************
+// ____ ____
+// / /\/ /
+// /___/ \ / Vendor: Xilinx
+// \ \ \/ Version: 2.3
+// \ \ Application: MIG
+// / / Filename: ddr2_mem_if_top.v
+// /___/ /\ Date Last Modified: $Date: 2008/07/22 15:41:06 $
+// \ \ / \ Date Created: Wed Aug 16 2006
+// \___\/\___\
+//
+//Device: Virtex-5
+//Design Name: DDR/DDR2
+//Purpose:
+// Top-level for parameterizable (DDR or DDR2) memory interface
+//Reference:
+//Revision History:
+//*****************************************************************************
+
+`timescale 1ns/1ps
+
+module ddr2_mem_if_top #
+ (
+ // Following parameters are for 72-bit RDIMM design (for ML561 Reference
+ // board design). Actual values may be different. Actual parameters values
+ // are passed from design top module ddr2_sdram module. Please refer to
+ // the ddr2_sdram module for actual values.
+ parameter BANK_WIDTH = 2,
+ parameter CKE_WIDTH = 1,
+ parameter CLK_WIDTH = 1,
+ parameter COL_WIDTH = 10,
+ parameter CS_BITS = 0,
+ parameter CS_NUM = 1,
+ parameter CS_WIDTH = 1,
+ parameter USE_DM_PORT = 1,
+ parameter DM_WIDTH = 9,
+ parameter DQ_WIDTH = 72,
+ parameter DQ_BITS = 7,
+ parameter DQ_PER_DQS = 8,
+ parameter DQS_BITS = 4,
+ parameter DQS_WIDTH = 9,
+ parameter HIGH_PERFORMANCE_MODE = "TRUE",
+ parameter ODT_WIDTH = 1,
+ parameter ROW_WIDTH = 14,
+ parameter APPDATA_WIDTH = 144,
+ parameter ADDITIVE_LAT = 0,
+ parameter BURST_LEN = 4,
+ parameter BURST_TYPE = 0,
+ parameter CAS_LAT = 5,
+ parameter ECC_ENABLE = 0,
+ parameter MULTI_BANK_EN = 1,
+ parameter TWO_T_TIME_EN = 0,
+ parameter ODT_TYPE = 1,
+ parameter DDR_TYPE = 1,
+ parameter REDUCE_DRV = 0,
+ parameter REG_ENABLE = 1,
+ parameter TREFI_NS = 7800,
+ parameter TRAS = 40000,
+ parameter TRCD = 15000,
+ parameter TRFC = 105000,
+ parameter TRP = 15000,
+ parameter TRTP = 7500,
+ parameter TWR = 15000,
+ parameter TWTR = 10000,
+ parameter CLK_PERIOD = 3000,
+ parameter SIM_ONLY = 0,
+ parameter DEBUG_EN = 0,
+ parameter DQS_IO_COL = 0,
+ parameter DQ_IO_MS = 0,
+ parameter EN_SYN = "FALSE"
+ )
+ (
+ input clk0,
+ input clk90,
+ input clkdiv0,
+ input rst0,
+ input rst90,
+ input rstdiv0,
+ //added by xtan & gdgib
+ input af_clk, //address fifo clk
+ input rb_clk, //read buffer clk
+ input wb_clk, //write buffer clk
+ input af_rst, //address fifo rst
+ input rb_rst, //read buffer rst
+ input wb_rst, //write buffer rst
+ output rb_full, //read buffer is full
+ //end of add
+ input [2:0] app_af_cmd,
+ input [30:0] app_af_addr,
+ input app_af_wren,
+ input app_wdf_wren,
+ input [APPDATA_WIDTH-1:0] app_wdf_data,
+ input [(APPDATA_WIDTH/8)-1:0] app_wdf_mask_data,
+ output [1:0] rd_ecc_error,
+ output app_af_afull,
+ output app_wdf_afull,
+ output rd_data_valid,
+ input rd_data_rden,
+ output [APPDATA_WIDTH-1:0] rd_data_fifo_out,
+ output phy_init_done,
+ output [CLK_WIDTH-1:0] ddr_ck,
+ output [CLK_WIDTH-1:0] ddr_ck_n,
+ output [ROW_WIDTH-1:0] ddr_addr,
+ output [BANK_WIDTH-1:0] ddr_ba,
+ output ddr_ras_n,
+ output ddr_cas_n,
+ output ddr_we_n,
+ output [CS_WIDTH-1:0] ddr_cs_n,
+ output [CKE_WIDTH-1:0] ddr_cke,
+ output [ODT_WIDTH-1:0] ddr_odt,
+ output [DM_WIDTH-1:0] ddr_dm,
+ inout [DQS_WIDTH-1:0] ddr_dqs,
+ inout [DQS_WIDTH-1:0] ddr_dqs_n,
+ inout [DQ_WIDTH-1:0] ddr_dq,
+ // Debug signals (optional use)
+ input dbg_idel_up_all,
+ input dbg_idel_down_all,
+ input dbg_idel_up_dq,
+ input dbg_idel_down_dq,
+ input dbg_idel_up_dqs,
+ input dbg_idel_down_dqs,
+ input dbg_idel_up_gate,
+ input dbg_idel_down_gate,
+ input [DQ_BITS-1:0] dbg_sel_idel_dq,
+ input dbg_sel_all_idel_dq,
+ input [DQS_BITS:0] dbg_sel_idel_dqs,
+ input dbg_sel_all_idel_dqs,
+ input [DQS_BITS:0] dbg_sel_idel_gate,
+ input dbg_sel_all_idel_gate,
+ output [3:0] dbg_calib_done,
+ output [3:0] dbg_calib_err,
+ output [(6*DQ_WIDTH)-1:0] dbg_calib_dq_tap_cnt,
+ output [(6*DQS_WIDTH)-1:0] dbg_calib_dqs_tap_cnt,
+ output [(6*DQS_WIDTH)-1:0] dbg_calib_gate_tap_cnt,
+ output [DQS_WIDTH-1:0] dbg_calib_rd_data_sel,
+ output [(5*DQS_WIDTH)-1:0] dbg_calib_rden_dly,
+ output [(5*DQS_WIDTH)-1:0] dbg_calib_gate_dly
+ );
+
+ wire [30:0] af_addr;
+ wire [2:0] af_cmd;
+ wire af_empty;
+ wire [ROW_WIDTH-1:0] ctrl_addr;
+ wire ctrl_af_rden;
+ wire [BANK_WIDTH-1:0] ctrl_ba;
+ wire ctrl_cas_n;
+ wire [CS_NUM-1:0] ctrl_cs_n;
+ wire ctrl_ras_n;
+ wire ctrl_rden;
+ wire ctrl_ref_flag;
+ wire ctrl_we_n;
+ wire ctrl_wren;
+ wire [DQS_WIDTH-1:0] phy_calib_rden;
+ wire [DQS_WIDTH-1:0] phy_calib_rden_sel;
+ wire [DQ_WIDTH-1:0] rd_data_fall;
+ wire [DQ_WIDTH-1:0] rd_data_rise;
+ wire [(2*DQ_WIDTH)-1:0] wdf_data;
+ wire [((2*DQ_WIDTH)/8)-1:0] wdf_mask_data;
+ wire wdf_rden;
+ wire wr_fifo_clear, wr_fifo_burst, rd_fifo_clear;
+
+ //***************************************************************************
+
+ ddr2_phy_top #
+ (
+ .BANK_WIDTH (BANK_WIDTH),
+ .CKE_WIDTH (CKE_WIDTH),
+ .CLK_WIDTH (CLK_WIDTH),
+ .COL_WIDTH (COL_WIDTH),
+ .CS_NUM (CS_NUM),
+ .CS_WIDTH (CS_WIDTH),
+ .USE_DM_PORT (USE_DM_PORT),
+ .DM_WIDTH (DM_WIDTH),
+ .DQ_WIDTH (DQ_WIDTH),
+ .DQ_BITS (DQ_BITS),
+ .DQ_PER_DQS (DQ_PER_DQS),
+ .DQS_BITS (DQS_BITS),
+ .DQS_WIDTH (DQS_WIDTH),
+ .HIGH_PERFORMANCE_MODE (HIGH_PERFORMANCE_MODE),
+ .ODT_WIDTH (ODT_WIDTH),
+ .ROW_WIDTH (ROW_WIDTH),
+ .TWO_T_TIME_EN (TWO_T_TIME_EN),
+ .ADDITIVE_LAT (ADDITIVE_LAT),
+ .BURST_LEN (BURST_LEN),
+ .BURST_TYPE (BURST_TYPE),
+ .CAS_LAT (CAS_LAT),
+ .ECC_ENABLE (ECC_ENABLE),
+ .ODT_TYPE (ODT_TYPE),
+ .DDR_TYPE (DDR_TYPE),
+ .REDUCE_DRV (REDUCE_DRV),
+ .REG_ENABLE (REG_ENABLE),
+ .TWR (TWR),
+ .CLK_PERIOD (CLK_PERIOD),
+ .SIM_ONLY (SIM_ONLY),
+ .DEBUG_EN (DEBUG_EN),
+ .DQS_IO_COL (DQS_IO_COL),
+ .DQ_IO_MS (DQ_IO_MS)
+ )
+ u_phy_top
+ (
+ .clk0 (clk0),
+ .clk90 (clk90),
+ .clkdiv0 (clkdiv0),
+ .rst0 (rst0),
+ .rst90 (rst90),
+ .rstdiv0 (rstdiv0),
+ .ctrl_wren (ctrl_wren),
+ .ctrl_addr (ctrl_addr),
+ .ctrl_ba (ctrl_ba),
+ .ctrl_ras_n (ctrl_ras_n),
+ .ctrl_cas_n (ctrl_cas_n),
+ .ctrl_we_n (ctrl_we_n),
+ .ctrl_cs_n (ctrl_cs_n),
+ .ctrl_rden (ctrl_rden),
+ .ctrl_ref_flag (ctrl_ref_flag),
+ .wdf_data (wdf_data),
+ .wdf_mask_data (wdf_mask_data),
+ .wdf_rden (wdf_rden),
+ .phy_init_done (phy_init_done),
+ .phy_calib_rden (phy_calib_rden),
+ .phy_calib_rden_sel (phy_calib_rden_sel),
+ .rd_data_rise (rd_data_rise),
+ .rd_data_fall (rd_data_fall),
+ .ddr_ck (ddr_ck),
+ .ddr_ck_n (ddr_ck_n),
+ .ddr_addr (ddr_addr),
+ .ddr_ba (ddr_ba),
+ .ddr_ras_n (ddr_ras_n),
+ .ddr_cas_n (ddr_cas_n),
+ .ddr_we_n (ddr_we_n),
+ .ddr_cs_n (ddr_cs_n),
+ .ddr_cke (ddr_cke),
+ .ddr_odt (ddr_odt),
+ .ddr_dm (ddr_dm),
+ .ddr_dqs (ddr_dqs),
+ .ddr_dqs_n (ddr_dqs_n),
+ .ddr_dq (ddr_dq),
+ .dbg_idel_up_all (dbg_idel_up_all),
+ .dbg_idel_down_all (dbg_idel_down_all),
+ .dbg_idel_up_dq (dbg_idel_up_dq),
+ .dbg_idel_down_dq (dbg_idel_down_dq),
+ .dbg_idel_up_dqs (dbg_idel_up_dqs),
+ .dbg_idel_down_dqs (dbg_idel_down_dqs),
+ .dbg_idel_up_gate (dbg_idel_up_gate),
+ .dbg_idel_down_gate (dbg_idel_down_gate),
+ .dbg_sel_idel_dq (dbg_sel_idel_dq),
+ .dbg_sel_all_idel_dq (dbg_sel_all_idel_dq),
+ .dbg_sel_idel_dqs (dbg_sel_idel_dqs),
+ .dbg_sel_all_idel_dqs (dbg_sel_all_idel_dqs),
+ .dbg_sel_idel_gate (dbg_sel_idel_gate),
+ .dbg_sel_all_idel_gate (dbg_sel_all_idel_gate),
+ .dbg_calib_done (dbg_calib_done),
+ .dbg_calib_err (dbg_calib_err),
+ .dbg_calib_dq_tap_cnt (dbg_calib_dq_tap_cnt),
+ .dbg_calib_dqs_tap_cnt (dbg_calib_dqs_tap_cnt),
+ .dbg_calib_gate_tap_cnt (dbg_calib_gate_tap_cnt),
+ .dbg_calib_rd_data_sel (dbg_calib_rd_data_sel),
+ .dbg_calib_rden_dly (dbg_calib_rden_dly),
+ .dbg_calib_gate_dly (dbg_calib_gate_dly)
+ );
+
+ ddr2_usr_top #
+ (
+ .BANK_WIDTH (BANK_WIDTH),
+ .COL_WIDTH (COL_WIDTH),
+ .CS_BITS (CS_BITS),
+ .DQ_WIDTH (DQ_WIDTH),
+ .DQ_PER_DQS (DQ_PER_DQS),
+ .DQS_WIDTH (DQS_WIDTH),
+ .APPDATA_WIDTH (APPDATA_WIDTH),
+ .APPDATA_BURST_LEN(BURST_LEN * DQ_WIDTH / APPDATA_WIDTH),
+ .APPDATA_BURST_BITS(3),
+ .ECC_ENABLE (ECC_ENABLE),
+ .ROW_WIDTH (ROW_WIDTH),
+ .EN_SYN (EN_SYN)
+ )
+ u_usr_top
+ (
+ .clk0 (clk0),
+ .clk90 (clk90),
+ .rst0 (rst0),
+ .af_clk (af_clk),
+ .rb_clk (rb_clk),
+ .wb_clk (wb_clk),
+ .af_rst (af_rst),
+ .rb_rst (rb_rst),
+ .wb_rst (wb_rst),
+ .rb_full (rb_full),
+ .rd_data_in_rise (rd_data_rise),
+ .rd_data_in_fall (rd_data_fall),
+ .phy_calib_rden (phy_calib_rden),
+ .phy_calib_rden_sel(phy_calib_rden_sel),
+ .rd_data_valid (rd_data_valid),
+ .rd_data_rden (rd_data_rden),
+ .rd_ecc_error (rd_ecc_error),
+ .rd_data_fifo_out (rd_data_fifo_out),
+ .app_af_cmd (app_af_cmd),
+ .app_af_addr (app_af_addr),
+ .app_af_wren (app_af_wren),
+ .ctrl_af_rden (ctrl_af_rden),
+ .af_cmd (af_cmd),
+ .af_addr (af_addr),
+ .af_empty (af_empty),
+ .app_af_afull (app_af_afull),
+ .app_wdf_wren (app_wdf_wren),
+ .app_wdf_data (app_wdf_data),
+ .app_wdf_mask_data (app_wdf_mask_data),
+ .wdf_rden (wdf_rden),
+ .app_wdf_afull (app_wdf_afull),
+ .wdf_data (wdf_data),
+ .wdf_mask_data (wdf_mask_data),
+ .wr_fifo_clear (wr_fifo_clear),
+ .wr_fifo_burst (wr_fifo_burst),
+ .rd_fifo_clear (rd_fifo_clear)
+ );
+
+
+ ddr2_ctrl #
+ (
+ .BANK_WIDTH (BANK_WIDTH),
+ .COL_WIDTH (COL_WIDTH),
+ .CS_BITS (CS_BITS),
+ .CS_NUM (CS_NUM),
+ .ROW_WIDTH (ROW_WIDTH),
+ .ADDITIVE_LAT (ADDITIVE_LAT),
+ .BURST_LEN (BURST_LEN),
+ .CAS_LAT (CAS_LAT),
+ .ECC_ENABLE (ECC_ENABLE),
+ .REG_ENABLE (REG_ENABLE),
+ .MULTI_BANK_EN (MULTI_BANK_EN),
+ .TWO_T_TIME_EN (TWO_T_TIME_EN),
+ .TREFI_NS (TREFI_NS),
+ .TRAS (TRAS),
+ .TRCD (TRCD),
+ .TRFC (TRFC),
+ .TRP (TRP),
+ .TRTP (TRTP),
+ .TWR (TWR),
+ .TWTR (TWTR),
+ .CLK_PERIOD (CLK_PERIOD),
+ .DDR_TYPE (DDR_TYPE)
+ )
+ u_ctrl
+ (
+ .clk (clk0),
+ .rst (rst0),
+ .af_cmd (af_cmd),
+ .af_addr (af_addr),
+ .af_empty (af_empty),
+ .wr_fifo_clear (wr_fifo_clear),
+ .wr_fifo_burst (wr_fifo_burst),
+ .rd_fifo_clear (rd_fifo_clear),
+ .phy_init_done (phy_init_done),
+ .ctrl_ref_flag (ctrl_ref_flag),
+ .ctrl_af_rden (ctrl_af_rden),
+ .ctrl_wren (ctrl_wren),
+ .ctrl_rden (ctrl_rden),
+ .ctrl_addr (ctrl_addr),
+ .ctrl_ba (ctrl_ba),
+ .ctrl_ras_n (ctrl_ras_n),
+ .ctrl_cas_n (ctrl_cas_n),
+ .ctrl_we_n (ctrl_we_n),
+ .ctrl_cs_n (ctrl_cs_n)
+ );
+
+endmodule
--- /dev/null
+//*****************************************************************************
+// DISCLAIMER OF LIABILITY
+//
+// This text/file contains proprietary, confidential
+// information of Xilinx, Inc., is distributed under license
+// from Xilinx, Inc., and may be used, copied and/or
+// disclosed only pursuant to the terms of a valid license
+// agreement with Xilinx, Inc. Xilinx hereby grants you a
+// license to use this text/file solely for design, simulation,
+// implementation and creation of design files limited
+// to Xilinx devices or technologies. Use with non-Xilinx
+// devices or technologies is expressly prohibited and
+// immediately terminates your license unless covered by
+// a separate agreement.
+//
+// Xilinx is providing this design, code, or information
+// "as-is" solely for use in developing programs and
+// solutions for Xilinx devices, with no obligation on the
+// part of Xilinx to provide support. By providing this design,
+// code, or information as one possible implementation of
+// this feature, application or standard, Xilinx is making no
+// representation that this implementation is free from any
+// claims of infringement. You are responsible for
+// obtaining any rights you may require for your implementation.
+// Xilinx expressly disclaims any warranty whatsoever with
+// respect to the adequacy of the implementation, including
+// but not limited to any warranties or representations that this
+// implementation is free from claims of infringement, implied
+// warranties of merchantability or fitness for a particular
+// purpose.
+//
+// Xilinx products are not intended for use in life support
+// appliances, devices, or systems. Use in such applications is
+// expressly prohibited.
+//
+// Any modifications that are made to the Source Code are
+// done at the user\92s sole risk and will be unsupported.
+//
+// Copyright (c) 2006-2007 Xilinx, Inc. All rights reserved.
+//
+// This copyright and support notice must be retained as part
+// of this text at all times.
+//*****************************************************************************
+// ____ ____
+// / /\/ /
+// /___/ \ / Vendor: Xilinx
+// \ \ \/ Version: 2.3
+// \ \ Application: MIG
+// / / Filename: ddr2_phy_calib.v
+// /___/ /\ Date Last Modified: $Date: 2008/07/02 14:03:08 $
+// \ \ / \ Date Created: Thu Aug 10 2006
+// \___\/\___\
+//
+//Device: Virtex-5
+//Design Name: DDR2
+//Purpose:
+// This module handles calibration after memory initialization.
+//Reference:
+//Revision History:
+//*****************************************************************************
+
+`timescale 1ns/1ps
+
+module ddr2_phy_calib #
+ (
+ // Following parameters are for 72-bit RDIMM design (for ML561 Reference
+ // board design). Actual values may be different. Actual parameters values
+ // are passed from design top module ddr2_sdram module. Please refer to
+ // the ddr2_sdram module for actual values.
+ parameter DQ_WIDTH = 72,
+ parameter DQ_BITS = 7,
+ parameter DQ_PER_DQS = 8,
+ parameter DQS_BITS = 4,
+ parameter DQS_WIDTH = 9,
+ parameter ADDITIVE_LAT = 0,
+ parameter CAS_LAT = 5,
+ parameter REG_ENABLE = 1,
+ parameter CLK_PERIOD = 3000,
+ parameter SIM_ONLY = 0,
+ parameter DEBUG_EN = 0
+ )
+ (
+ input clk,
+ input clkdiv,
+ input rstdiv,
+ input [3:0] calib_start,
+ input ctrl_rden,
+ input phy_init_rden,
+ input [DQ_WIDTH-1:0] rd_data_rise,
+ input [DQ_WIDTH-1:0] rd_data_fall,
+ input calib_ref_done,
+ output reg [3:0] calib_done,
+ output reg calib_ref_req,
+ output [DQS_WIDTH-1:0] calib_rden,
+ output reg [DQS_WIDTH-1:0] calib_rden_sel,
+ output reg dlyrst_dq,
+ output reg [DQ_WIDTH-1:0] dlyce_dq,
+ output reg [DQ_WIDTH-1:0] dlyinc_dq,
+ output reg dlyrst_dqs,
+ output reg [DQS_WIDTH-1:0] dlyce_dqs,
+ output reg [DQS_WIDTH-1:0] dlyinc_dqs,
+ output reg [DQS_WIDTH-1:0] dlyrst_gate,
+ output reg [DQS_WIDTH-1:0] dlyce_gate,
+ output reg [DQS_WIDTH-1:0] dlyinc_gate,
+ output [DQS_WIDTH-1:0] en_dqs,
+ output [DQS_WIDTH-1:0] rd_data_sel,
+ // Debug signals (optional use)
+ input dbg_idel_up_all,
+ input dbg_idel_down_all,
+ input dbg_idel_up_dq,
+ input dbg_idel_down_dq,
+ input dbg_idel_up_dqs,
+ input dbg_idel_down_dqs,
+ input dbg_idel_up_gate,
+ input dbg_idel_down_gate,
+ input [DQ_BITS-1:0] dbg_sel_idel_dq,
+ input dbg_sel_all_idel_dq,
+ input [DQS_BITS:0] dbg_sel_idel_dqs,
+ input dbg_sel_all_idel_dqs,
+ input [DQS_BITS:0] dbg_sel_idel_gate,
+ input dbg_sel_all_idel_gate,
+ output [3:0] dbg_calib_done,
+ output [3:0] dbg_calib_err,
+ output [(6*DQ_WIDTH)-1:0] dbg_calib_dq_tap_cnt,
+ output [(6*DQS_WIDTH)-1:0] dbg_calib_dqs_tap_cnt,
+ output [(6*DQS_WIDTH)-1:0] dbg_calib_gate_tap_cnt,
+ output [DQS_WIDTH-1:0] dbg_calib_rd_data_sel,
+ output [(5*DQS_WIDTH)-1:0] dbg_calib_rden_dly,
+ output [(5*DQS_WIDTH)-1:0] dbg_calib_gate_dly
+ );
+
+ // minimum time (in IDELAY taps) for which capture data must be stable for
+ // algorithm to consider
+ localparam MIN_WIN_SIZE = 5;
+ // IDEL_SET_VAL = (# of cycles - 1) to wait after changing IDELAY value
+ // we only have to wait enough for input with new IDELAY value to
+ // propagate through pipeline stages.
+ localparam IDEL_SET_VAL = 3'b111;
+ // # of clock cycles to delay read enable to determine if read data pattern
+ // is correct for stage 3/4 (RDEN, DQS gate) calibration
+ localparam CALIB_RDEN_PIPE_LEN = 31;
+ // translate CAS latency into number of clock cycles for read valid delay
+ // determination. Really only needed for CL = 2.5 (set to 2)
+ localparam CAS_LAT_RDEN = (CAS_LAT == 25) ? 2 : CAS_LAT;
+ // an SRL32 is used to delay CTRL_RDEN to generate read valid signal. This
+ // is min possible value delay through SRL32 can be
+ localparam RDEN_BASE_DELAY = CAS_LAT_RDEN + ADDITIVE_LAT + REG_ENABLE;
+ // an SRL32 is used to delay the CTRL_RDEN from the read postamble DQS
+ // gate. This is min possible value the SRL32 delay can be:
+ // - Delay from end of deassertion of CTRL_RDEN to last falling edge of
+ // read burst = 3.5 (CTRL_RDEN -> CAS delay) + 3 (min CAS latency) = 6.5
+ // - Minimum time for DQS gate circuit to be generated:
+ // * 1 cyc to register CTRL_RDEN from controller
+ // * 1 cyc after RDEN_CTRL falling edge
+ // * 1 cyc min through SRL32
+ // * 1 cyc through SRL32 output flop
+ // * 0 (<1) cyc of synchronization to DQS domain via IDELAY
+ // * 1 cyc of delay through IDDR to generate CE to DQ IDDR's
+ // Total = 5 cyc < 6.5 cycles
+ // The total should be less than 5.5 cycles to account prop delays
+ // adding one cycle to the synchronization time via the IDELAY.
+ // NOTE: Value differs because of optional pipeline register added
+ // for case of RDEN_BASE_DELAY > 3 to improve timing
+ localparam GATE_BASE_DELAY = RDEN_BASE_DELAY - 3;
+ localparam GATE_BASE_INIT = (GATE_BASE_DELAY <= 1) ? 0 : GATE_BASE_DELAY;
+ // used for RDEN calibration: difference between shift value used during
+ // calibration, and shift value for actual RDEN SRL. Only applies when
+ // RDEN edge is immediately captured by CLKDIV0. If not (depends on phase
+ // of CLK0 and CLKDIV0 when RDEN is asserted), then add 1 to this value.
+ localparam CAL3_RDEN_SRL_DLY_DELTA = 6;
+ // fix minimum value of DQS to be 1 to handle the case where's there's only
+ // one DQS group. We could also enforce that user always inputs minimum
+ // value of 1 for DQS_BITS (even when DQS_WIDTH=1). Leave this as safeguard
+ // Assume we don't have to do this for DQ, DQ_WIDTH always > 1
+ localparam DQS_BITS_FIX = (DQS_BITS == 0) ? 1 : DQS_BITS;
+ // how many taps to "pre-delay" DQ before stg 1 calibration - not needed for
+ // current calibration, but leave for debug
+ localparam DQ_IDEL_INIT = 6'b000000;
+ // # IDELAY taps per bit time (i.e. half cycle). Limit to 63.
+ localparam integer BIT_TIME_TAPS = (CLK_PERIOD/150 < 64) ?
+ CLK_PERIOD/150 : 63;
+
+ // used in various places during stage 4 cal: (1) determines maximum taps
+ // to increment when finding right edge, (2) amount to decrement after
+ // finding left edge, (3) amount to increment after finding right edge
+ localparam CAL4_IDEL_BIT_VAL = (BIT_TIME_TAPS >= 6'b100000) ?
+ 6'b100000 : BIT_TIME_TAPS;
+
+ localparam CAL1_IDLE = 4'h0;
+ localparam CAL1_INIT = 4'h1;
+ localparam CAL1_INC_IDEL = 4'h2;
+ localparam CAL1_FIND_FIRST_EDGE = 4'h3;
+ localparam CAL1_FIRST_EDGE_IDEL_WAIT = 4'h4;
+ localparam CAL1_FOUND_FIRST_EDGE_WAIT = 4'h5;
+ localparam CAL1_FIND_SECOND_EDGE = 4'h6;
+ localparam CAL1_SECOND_EDGE_IDEL_WAIT = 4'h7;
+ localparam CAL1_CALC_IDEL = 4'h8;
+ localparam CAL1_DEC_IDEL = 4'h9;
+ localparam CAL1_DONE = 4'hA;
+
+ localparam CAL2_IDLE = 4'h0;
+ localparam CAL2_INIT = 4'h1;
+ localparam CAL2_INIT_IDEL_WAIT = 4'h2;
+ localparam CAL2_FIND_EDGE_POS = 4'h3;
+ localparam CAL2_FIND_EDGE_IDEL_WAIT_POS = 4'h4;
+ localparam CAL2_FIND_EDGE_NEG = 4'h5;
+ localparam CAL2_FIND_EDGE_IDEL_WAIT_NEG = 4'h6;
+ localparam CAL2_DEC_IDEL = 4'h7;
+ localparam CAL2_DONE = 4'h8;
+
+ localparam CAL3_IDLE = 3'h0;
+ localparam CAL3_INIT = 3'h1;
+ localparam CAL3_DETECT = 3'h2;
+ localparam CAL3_RDEN_PIPE_CLR_WAIT = 3'h3;
+ localparam CAL3_DONE = 3'h4;
+
+ localparam CAL4_IDLE = 3'h0;
+ localparam CAL4_INIT = 3'h1;
+ localparam CAL4_FIND_WINDOW = 3'h2;
+ localparam CAL4_FIND_EDGE = 3'h3;
+ localparam CAL4_IDEL_WAIT = 3'h4;
+ localparam CAL4_RDEN_PIPE_CLR_WAIT = 3'h5;
+ localparam CAL4_ADJ_IDEL = 3'h6;
+ localparam CAL4_DONE = 3'h7;
+
+ integer i, j;
+
+ reg [5:0] cal1_bit_time_tap_cnt;
+ reg [1:0] cal1_data_chk_last;
+ reg cal1_data_chk_last_valid;
+ reg [1:0] cal1_data_chk_r;
+ reg cal1_dlyce_dq;
+ reg cal1_dlyinc_dq;
+ reg cal1_dqs_dq_init_phase;
+ reg cal1_detect_edge;
+ reg cal1_detect_stable;
+ reg cal1_found_second_edge;
+ reg cal1_found_rising;
+ reg cal1_found_window;
+ reg cal1_first_edge_done;
+ reg [5:0] cal1_first_edge_tap_cnt;
+ reg [6:0] cal1_idel_dec_cnt;
+ reg [5:0] cal1_idel_inc_cnt;
+ reg [5:0] cal1_idel_max_tap;
+ reg cal1_idel_max_tap_we;
+ reg [5:0] cal1_idel_tap_cnt;
+ reg cal1_idel_tap_limit_hit;
+ reg [6:0] cal1_low_freq_idel_dec;
+ reg cal1_ref_req;
+ wire cal1_refresh;
+ reg [3:0] cal1_state;
+ reg [3:0] cal1_window_cnt;
+ reg cal2_curr_sel;
+ wire cal2_detect_edge;
+ reg cal2_dlyce_dqs;
+ reg cal2_dlyinc_dqs;
+ reg [5:0] cal2_idel_dec_cnt;
+ reg [5:0] cal2_idel_tap_cnt;
+ reg [5:0] cal2_idel_tap_limit;
+ reg cal2_idel_tap_limit_hit;
+ reg cal2_rd_data_fall_last_neg;
+ reg cal2_rd_data_fall_last_pos;
+ reg cal2_rd_data_last_valid_neg;
+ reg cal2_rd_data_last_valid_pos;
+ reg cal2_rd_data_rise_last_neg;
+ reg cal2_rd_data_rise_last_pos;
+ reg [DQS_WIDTH-1:0] cal2_rd_data_sel;
+ wire cal2_rd_data_sel_edge;
+ reg [DQS_WIDTH-1:0] cal2_rd_data_sel_r;
+ reg cal2_ref_req;
+ reg [3:0] cal2_state;
+ reg cal3_data_match;
+ reg cal3_data_match_stgd;
+ wire cal3_data_valid;
+ wire cal3_match_found;
+ wire [4:0] cal3_rden_dly;
+ reg [4:0] cal3_rden_srl_a;
+ reg [2:0] cal3_state;
+ wire cal4_data_good;
+ reg cal4_data_match;
+ reg cal4_data_match_stgd;
+ wire cal4_data_valid;
+ reg cal4_dlyce_gate;
+ reg cal4_dlyinc_gate;
+ reg cal4_dlyrst_gate;
+ reg [4:0] cal4_gate_srl_a;
+ reg [5:0] cal4_idel_adj_cnt;
+ reg cal4_idel_adj_inc;
+ reg cal4_idel_bit_tap;
+ reg [5:0] cal4_idel_tap_cnt;
+ reg cal4_idel_max_tap;
+ reg [4:0] cal4_rden_srl_a;
+ reg cal4_ref_req;
+ reg cal4_seek_left;
+ reg cal4_stable_window;
+ reg [2:0] cal4_state;
+ reg [3:0] cal4_window_cnt;
+ reg [3:0] calib_done_tmp; // only for stg1/2/4
+ reg calib_ctrl_gate_pulse_r;
+ reg calib_ctrl_rden;
+ reg calib_ctrl_rden_r;
+ wire calib_ctrl_rden_negedge;
+ reg calib_ctrl_rden_negedge_r;
+ reg [3:0] calib_done_r;
+ reg [3:0] calib_err;
+ reg [1:0] calib_err_2;
+ wire calib_init_gate_pulse;
+ reg calib_init_gate_pulse_r;
+ reg calib_init_gate_pulse_r1;
+ reg calib_init_rden;
+ reg calib_init_rden_r;
+ reg [4:0] calib_rden_srl_a;
+ wire [4:0] calib_rden_srl_a_r;
+ reg [(5*DQS_WIDTH)-1:0] calib_rden_dly;
+ reg calib_rden_edge_r;
+ reg [4:0] calib_rden_pipe_cnt;
+ wire calib_rden_srl_out;
+ wire calib_rden_srl_out_r;
+ reg calib_rden_srl_out_r1;
+ reg calib_rden_valid;
+ reg calib_rden_valid_stgd;
+ reg [DQ_BITS-1:0] count_dq;
+ reg [DQS_BITS_FIX-1:0] count_dqs;
+ reg [DQS_BITS_FIX-1:0] count_gate;
+ reg [DQS_BITS_FIX-1:0] count_rden;
+ reg ctrl_rden_r;
+ wire dlyce_or;
+ reg [(5*DQS_WIDTH)-1:0] gate_dly;
+ wire [(5*DQS_WIDTH)-1:0] gate_dly_r;
+ wire gate_srl_in;
+ wire [DQS_WIDTH-1:0] gate_srl_out;
+ wire [DQS_WIDTH-1:0] gate_srl_out_r;
+ reg [2:0] idel_set_cnt;
+ wire idel_set_wait;
+ reg [DQ_BITS-1:0] next_count_dq;
+ reg [DQS_BITS_FIX-1:0] next_count_dqs;
+ reg [DQS_BITS_FIX-1:0] next_count_gate;
+ reg phy_init_rden_r;
+ reg phy_init_rden_r1;
+ reg [DQ_WIDTH-1:0] rd_data_fall_1x_r;
+ reg [DQS_WIDTH-1:0] rd_data_fall_1x_r1;
+ reg [DQS_WIDTH-1:0] rd_data_fall_2x_r;
+ wire [DQS_WIDTH-1:0] rd_data_fall_chk_q1;
+ wire [DQS_WIDTH-1:0] rd_data_fall_chk_q2;
+ reg [DQ_WIDTH-1:0] rd_data_rise_1x_r;
+ reg [DQS_WIDTH-1:0] rd_data_rise_1x_r1;
+ reg [DQS_WIDTH-1:0] rd_data_rise_2x_r;
+ wire [DQS_WIDTH-1:0] rd_data_rise_chk_q1;
+ wire [DQS_WIDTH-1:0] rd_data_rise_chk_q2;
+ reg rdd_fall_q1;
+ reg rdd_fall_q1_r;
+ reg rdd_fall_q1_r1;
+ reg rdd_fall_q2;
+ reg rdd_fall_q2_r;
+ reg rdd_rise_q1;
+ reg rdd_rise_q1_r;
+ reg rdd_rise_q1_r1;
+ reg rdd_rise_q2;
+ reg rdd_rise_q2_r;
+ reg [DQS_BITS_FIX-1:0] rdd_mux_sel;
+ reg rden_dec;
+ reg [(5*DQS_WIDTH)-1:0] rden_dly;
+ wire [(5*DQS_WIDTH)-1:0] rden_dly_r;
+ reg [4:0] rden_dly_0;
+ reg rden_inc;
+ reg [DQS_WIDTH-1:0] rden_mux;
+ wire [DQS_WIDTH-1:0] rden_srl_out;
+
+ // Debug
+ integer x;
+ reg [5:0] dbg_dq_tap_cnt [DQ_WIDTH-1:0];
+ reg [5:0] dbg_dqs_tap_cnt [DQS_WIDTH-1:0];
+ reg [5:0] dbg_gate_tap_cnt [DQS_WIDTH-1:0];
+
+ //***************************************************************************
+ // Debug output ("dbg_phy_calib_*")
+ // NOTES:
+ // 1. All debug outputs coming out of PHY_CALIB are clocked off CLKDIV0,
+ // although they are also static after calibration is complete. This
+ // means the user can either connect them to a Chipscope ILA, or to
+ // either a sync/async VIO input block. Using an async VIO has the
+ // advantage of not requiring these paths to meet cycle-to-cycle timing.
+ // 2. The widths of most of these debug buses are dependent on the # of
+ // DQS/DQ bits (e.g. dq_tap_cnt width = 6 * (# of DQ bits)
+ // SIGNAL DESCRIPTION:
+ // 1. calib_done: 4 bits - each one asserted as each phase of calibration
+ // is completed.
+ // 2. calib_err: 4 bits - each one asserted when a calibration error
+ // encountered for that stage. Some of these bits may not
+ // be used (not all cal stages report an error).
+ // 3. dq_tap_cnt: final IDELAY tap counts for all DQ IDELAYs
+ // 4. dqs_tap_cnt: final IDELAY tap counts for all DQS IDELAYs
+ // 5. gate_tap_cnt: final IDELAY tap counts for all DQS gate
+ // synchronization IDELAYs
+ // 6. rd_data_sel: final read capture MUX (either "positive" or "negative"
+ // edge capture) settings for all DQS groups
+ // 7. rden_dly: related to # of cycles after issuing a read until when
+ // read data is valid - for all DQS groups
+ // 8. gate_dly: related to # of cycles after issuing a read until when
+ // clock enable for all DQ's is deasserted to prevent
+ // effect of DQS postamble glitch - for all DQS groups
+ //***************************************************************************
+
+ //*****************************************************************
+ // Record IDELAY tap values by "snooping" IDELAY control signals
+ //*****************************************************************
+
+ // record DQ IDELAY tap values
+ genvar dbg_dq_tc_i;
+ generate
+ for (dbg_dq_tc_i = 0; dbg_dq_tc_i < DQ_WIDTH;
+ dbg_dq_tc_i = dbg_dq_tc_i + 1) begin: gen_dbg_dq_tap_cnt
+ assign dbg_calib_dq_tap_cnt[(6*dbg_dq_tc_i)+5:(6*dbg_dq_tc_i)]
+ = dbg_dq_tap_cnt[dbg_dq_tc_i];
+ always @(posedge clkdiv)
+ if (rstdiv | dlyrst_dq)
+ dbg_dq_tap_cnt[dbg_dq_tc_i] <= 6'b000000;
+ else
+ if (dlyce_dq[dbg_dq_tc_i])
+ if (dlyinc_dq[dbg_dq_tc_i])
+ dbg_dq_tap_cnt[dbg_dq_tc_i]
+ <= dbg_dq_tap_cnt[dbg_dq_tc_i] + 1;
+ else
+ dbg_dq_tap_cnt[dbg_dq_tc_i]
+ <= dbg_dq_tap_cnt[dbg_dq_tc_i] - 1;
+ end
+ endgenerate
+
+ // record DQS IDELAY tap values
+ genvar dbg_dqs_tc_i;
+ generate
+ for (dbg_dqs_tc_i = 0; dbg_dqs_tc_i < DQS_WIDTH;
+ dbg_dqs_tc_i = dbg_dqs_tc_i + 1) begin: gen_dbg_dqs_tap_cnt
+ assign dbg_calib_dqs_tap_cnt[(6*dbg_dqs_tc_i)+5:(6*dbg_dqs_tc_i)]
+ = dbg_dqs_tap_cnt[dbg_dqs_tc_i];
+ always @(posedge clkdiv)
+ if (rstdiv | dlyrst_dqs)
+ dbg_dqs_tap_cnt[dbg_dqs_tc_i] <= 6'b000000;
+ else
+ if (dlyce_dqs[dbg_dqs_tc_i])
+ if (dlyinc_dqs[dbg_dqs_tc_i])
+ dbg_dqs_tap_cnt[dbg_dqs_tc_i]
+ <= dbg_dqs_tap_cnt[dbg_dqs_tc_i] + 1;
+ else
+ dbg_dqs_tap_cnt[dbg_dqs_tc_i]
+ <= dbg_dqs_tap_cnt[dbg_dqs_tc_i] - 1;
+ end
+ endgenerate
+
+ // record DQS gate IDELAY tap values
+ genvar dbg_gate_tc_i;
+ generate
+ for (dbg_gate_tc_i = 0; dbg_gate_tc_i < DQS_WIDTH;
+ dbg_gate_tc_i = dbg_gate_tc_i + 1) begin: gen_dbg_gate_tap_cnt
+ assign dbg_calib_gate_tap_cnt[(6*dbg_gate_tc_i)+5:(6*dbg_gate_tc_i)]
+ = dbg_gate_tap_cnt[dbg_gate_tc_i];
+ always @(posedge clkdiv)
+ if (rstdiv | dlyrst_gate[dbg_gate_tc_i])
+ dbg_gate_tap_cnt[dbg_gate_tc_i] <= 6'b000000;
+ else
+ if (dlyce_gate[dbg_gate_tc_i])
+ if (dlyinc_gate[dbg_gate_tc_i])
+ dbg_gate_tap_cnt[dbg_gate_tc_i]
+ <= dbg_gate_tap_cnt[dbg_gate_tc_i] + 1;
+ else
+ dbg_gate_tap_cnt[dbg_gate_tc_i]
+ <= dbg_gate_tap_cnt[dbg_gate_tc_i] - 1;
+ end
+ endgenerate
+
+ assign dbg_calib_done = calib_done;
+ assign dbg_calib_err = calib_err;
+ assign dbg_calib_rd_data_sel = cal2_rd_data_sel;
+ assign dbg_calib_rden_dly = rden_dly;
+ assign dbg_calib_gate_dly = gate_dly;
+
+ //***************************************************************************
+ // Read data pipelining, and read data "ISERDES" data width expansion
+ //***************************************************************************
+
+ // For all data bits, register incoming capture data to slow clock to improve
+ // timing. Adding single pipeline stage does not affect functionality (as
+ // long as we make sure to wait extra clock cycle after changing DQ IDELAY)
+ // Also note in this case that we're "missing" every other clock cycle's
+ // worth of data capture since we're sync'ing to the slow clock. This is
+ // fine for stage 1 and stage 2 cal, but not for stage 3 and 4 (see below
+ // for different circuit to handle those stages)
+ always @(posedge clkdiv) begin
+ rd_data_rise_1x_r <= rd_data_rise;
+ rd_data_fall_1x_r <= rd_data_fall;
+ end
+
+ // For every DQ_PER_DQS bit, generate what is essentially a ISERDES-type
+ // data width expander. Will need this for stage 3 and 4 cal, where we need
+ // to compare data over consecutive clock cycles. We can also use this for
+ // stage 2 as well (stage 2 doesn't require every bit to be looked at, only
+ // one bit per DQS group)
+ genvar rdd_i;
+ generate
+ for (rdd_i = 0; rdd_i < DQS_WIDTH; rdd_i = rdd_i + 1) begin: gen_rdd
+ // first stage: keep data in fast clk domain. Store data over two
+ // consecutive clock cycles for rise/fall data for proper transfer
+ // to slow clock domain
+ always @(posedge clk) begin
+ rd_data_rise_2x_r[rdd_i] <= rd_data_rise[(rdd_i*DQ_PER_DQS)];
+ rd_data_fall_2x_r[rdd_i] <= rd_data_fall[(rdd_i*DQ_PER_DQS)];
+ end
+ // second stage, register first stage to slow clock domain, 2nd stage
+ // consists of both these flops, and the rd_data_rise_1x_r flops
+ always @(posedge clkdiv) begin
+ rd_data_rise_1x_r1[rdd_i] <= rd_data_rise_2x_r[rdd_i];
+ rd_data_fall_1x_r1[rdd_i] <= rd_data_fall_2x_r[rdd_i];
+ end
+ // now we have four outputs - representing rise/fall outputs over last
+ // 2 fast clock cycles. However, the ordering these represent can either
+ // be: (1) Q2 = data @ time = n, Q1 = data @ time = n+1, or (2)
+ // Q2 = data @ time = n - 1, Q1 = data @ time = n (and data at [Q1,Q2]
+ // is "staggered") - leave it up to the stage of calibration using this
+ // to figure out which is which, if they care at all (e.g. stage 2 cal
+ // doesn't care about the ordering)
+ assign rd_data_rise_chk_q1[rdd_i]
+ = rd_data_rise_1x_r[(rdd_i*DQ_PER_DQS)];
+ assign rd_data_rise_chk_q2[rdd_i]
+ = rd_data_rise_1x_r1[rdd_i];
+ assign rd_data_fall_chk_q1[rdd_i]
+ = rd_data_fall_1x_r[(rdd_i*DQ_PER_DQS)];
+ assign rd_data_fall_chk_q2[rdd_i]
+ = rd_data_fall_1x_r1[rdd_i];
+ end
+ endgenerate
+
+ //*****************************************************************
+ // Outputs of these simplified ISERDES circuits then feed MUXes based on
+ // which DQ the current calibration algorithm needs to look at
+ //*****************************************************************
+
+ // generate MUX control; assume that adding an extra pipeline stage isn't
+ // an issue - whatever stage cal logic is using output of MUX will wait
+ // enough time after changing it
+ always @(posedge clkdiv) begin
+ (* full_case, parallel_case *) case (calib_done[2:0])
+ 3'b001: rdd_mux_sel <= next_count_dqs;
+ 3'b011: rdd_mux_sel <= count_rden;
+ 3'b111: rdd_mux_sel <= next_count_gate;
+ endcase
+ end
+
+ always @(posedge clkdiv) begin
+ rdd_rise_q1 <= rd_data_rise_chk_q1[rdd_mux_sel];
+ rdd_rise_q2 <= rd_data_rise_chk_q2[rdd_mux_sel];
+ rdd_fall_q1 <= rd_data_fall_chk_q1[rdd_mux_sel];
+ rdd_fall_q2 <= rd_data_fall_chk_q2[rdd_mux_sel];
+ end
+
+ //***************************************************************************
+ // Demultiplexor to control (reset, increment, decrement) IDELAY tap values
+ // For DQ:
+ // STG1: for per-bit-deskew, only inc/dec the current DQ. For non-per
+ // deskew, increment all bits in the current DQS set
+ // STG2: inc/dec all DQ's in the current DQS set.
+ // NOTE: Nice to add some error checking logic here (or elsewhere in the
+ // code) to check if logic attempts to overflow tap value
+ //***************************************************************************
+
+ // don't use DLYRST to reset value of IDELAY after reset. Need to change this
+ // if we want to allow user to recalibrate after initial reset
+ always @(posedge clkdiv)
+ if (rstdiv) begin
+ dlyrst_dq <= 1'b1;
+ dlyrst_dqs <= 1'b1;
+ end else begin
+ dlyrst_dq <= 1'b0;
+ dlyrst_dqs <= 1'b0;
+ end
+
+ always @(posedge clkdiv) begin
+ if (rstdiv) begin
+ dlyce_dq <= 'b0;
+ dlyinc_dq <= 'b0;
+ dlyce_dqs <= 'b0;
+ dlyinc_dqs <= 'b0;
+ end else begin
+ dlyce_dq <= 'b0;
+ dlyinc_dq <= 'b0;
+ dlyce_dqs <= 'b0;
+ dlyinc_dqs <= 'b0;
+
+ // stage 1 cal: change only specified DQ
+ if (cal1_dlyce_dq) begin
+ if (SIM_ONLY == 0) begin
+ dlyce_dq[count_dq] <= 1'b1;
+ dlyinc_dq[count_dq] <= cal1_dlyinc_dq;
+ end else begin
+ // if simulation, then calibrate only first DQ, apply results
+ // to all DQs (i.e. assume delay on all DQs is the same)
+ for (i = 0; i < DQ_WIDTH; i = i + 1) begin: loop_sim_dq_dly
+ dlyce_dq[i] <= 1'b1;
+ dlyinc_dq[i] <= cal1_dlyinc_dq;
+ end
+ end
+ end else if (cal2_dlyce_dqs) begin
+ // stage 2 cal: change DQS and all corresponding DQ's
+ if (SIM_ONLY == 0) begin
+ dlyce_dqs[count_dqs] <= 1'b1;
+ dlyinc_dqs[count_dqs] <= cal2_dlyinc_dqs;
+ for (i = 0; i < DQ_PER_DQS; i = i + 1) begin: loop_dqs_dly
+ dlyce_dq[(DQ_PER_DQS*count_dqs)+i] <= 1'b1;
+ dlyinc_dq[(DQ_PER_DQS*count_dqs)+i] <= cal2_dlyinc_dqs;
+ end
+ end else begin
+ for (i = 0; i < DQS_WIDTH; i = i + 1) begin: loop_sim_dqs_dly
+ // if simulation, then calibrate only first DQS
+ dlyce_dqs[i] <= 1'b1;
+ dlyinc_dqs[i] <= cal2_dlyinc_dqs;
+ for (j = 0; j < DQ_PER_DQS; j = j + 1) begin: loop_sim_dq_dqs_dly
+ dlyce_dq[(DQ_PER_DQS*i)+j] <= 1'b1;
+ dlyinc_dq[(DQ_PER_DQS*i)+j] <= cal2_dlyinc_dqs;
+ end
+ end
+ end
+ end else if (DEBUG_EN != 0) begin
+ // DEBUG: allow user to vary IDELAY tap settings
+ // For DQ IDELAY taps
+ if (dbg_idel_up_all || dbg_idel_down_all ||
+ dbg_sel_all_idel_dq) begin
+ for (x = 0; x < DQ_WIDTH; x = x + 1) begin: loop_dly_inc_dq
+ dlyce_dq[x] <= dbg_idel_up_all | dbg_idel_down_all |
+ dbg_idel_up_dq | dbg_idel_down_dq;
+ dlyinc_dq[x] <= dbg_idel_up_all | dbg_idel_up_dq;
+ end
+ end else begin
+ dlyce_dq <= 'b0;
+ dlyce_dq[dbg_sel_idel_dq] <= dbg_idel_up_dq |
+ dbg_idel_down_dq;
+ dlyinc_dq[dbg_sel_idel_dq] <= dbg_idel_up_dq;
+ end
+ // For DQS IDELAY taps
+ if (dbg_idel_up_all || dbg_idel_down_all ||
+ dbg_sel_all_idel_dqs) begin
+ for (x = 0; x < DQS_WIDTH; x = x + 1) begin: loop_dly_inc_dqs
+ dlyce_dqs[x] <= dbg_idel_up_all | dbg_idel_down_all |
+ dbg_idel_up_dqs | dbg_idel_down_dqs;
+ dlyinc_dqs[x] <= dbg_idel_up_all | dbg_idel_up_dqs;
+ end
+ end else begin
+ dlyce_dqs <= 'b0;
+ dlyce_dqs[dbg_sel_idel_dqs] <= dbg_idel_up_dqs |
+ dbg_idel_down_dqs;
+ dlyinc_dqs[dbg_sel_idel_dqs] <= dbg_idel_up_dqs;
+ end
+ end
+ end
+ end
+
+ // GATE synchronization is handled directly by Stage 4 calibration FSM
+ always @(posedge clkdiv)
+ if (rstdiv) begin
+ dlyrst_gate <= {DQS_WIDTH{1'b1}};
+ dlyce_gate <= {DQS_WIDTH{1'b0}};
+ dlyinc_gate <= {DQS_WIDTH{1'b0}};
+ end else begin
+ dlyrst_gate <= {DQS_WIDTH{1'b0}};
+ dlyce_gate <= {DQS_WIDTH{1'b0}};
+ dlyinc_gate <= {DQS_WIDTH{1'b0}};
+
+ if (cal4_dlyrst_gate) begin
+ if (SIM_ONLY == 0)
+ dlyrst_gate[count_gate] <= 1'b1;
+ else
+ for (i = 0; i < DQS_WIDTH; i = i + 1) begin: loop_gate_sim_dly_rst
+ dlyrst_gate[i] <= 1'b1;
+ end
+ end
+
+ if (cal4_dlyce_gate) begin
+ if (SIM_ONLY == 0) begin
+ dlyce_gate[count_gate] <= 1'b1;
+ dlyinc_gate[count_gate] <= cal4_dlyinc_gate;
+ end else begin
+ // if simulation, then calibrate only first gate
+ for (i = 0; i < DQS_WIDTH; i = i + 1) begin: loop_gate_sim_dly
+ dlyce_gate[i] <= 1'b1;
+ dlyinc_gate[i] <= cal4_dlyinc_gate;
+ end
+ end
+ end else if (DEBUG_EN != 0) begin
+ // DEBUG: allow user to vary IDELAY tap settings
+ if (dbg_idel_up_all || dbg_idel_down_all ||
+ dbg_sel_all_idel_gate) begin
+ for (x = 0; x < DQS_WIDTH; x = x + 1) begin: loop_dly_inc_gate
+ dlyce_gate[x] <= dbg_idel_up_all | dbg_idel_down_all |
+ dbg_idel_up_gate | dbg_idel_down_gate;
+ dlyinc_gate[x] <= dbg_idel_up_all | dbg_idel_up_gate;
+ end
+ end else begin
+ dlyce_gate <= {DQS_WIDTH{1'b0}};
+ dlyce_gate[dbg_sel_idel_gate] <= dbg_idel_up_gate |
+ dbg_idel_down_gate;
+ dlyinc_gate[dbg_sel_idel_gate] <= dbg_idel_up_gate;
+ end
+ end
+ end
+
+ //***************************************************************************
+ // signal to tell calibration state machines to wait and give IDELAY time to
+ // settle after it's value is changed (both time for IDELAY chain to settle,
+ // and for settled output to propagate through ISERDES). For general use: use
+ // for any calibration state machines that modify any IDELAY.
+ // Should give at least enough time for IDELAY output to settle (technically
+ // for V5, this should be "glitchless" when IDELAY taps are changed, so don't
+ // need any time here), and also time for new data to propagate through both
+ // ISERDES and the "RDD" MUX + associated pipelining
+ // For now, give very "generous" delay - doesn't really matter since only
+ // needed during calibration
+ //***************************************************************************
+
+ // determine if calibration polarity has changed
+ always @(posedge clkdiv)
+ cal2_rd_data_sel_r <= cal2_rd_data_sel;
+
+ assign cal2_rd_data_sel_edge = |(cal2_rd_data_sel ^ cal2_rd_data_sel_r);
+
+ // combine requests to modify any of the IDELAYs into one. Also when second
+ // stage capture "edge" polarity is changed (IDELAY isn't changed in this
+ // case, but use the same counter to stall cal logic)
+ assign dlyce_or = cal1_dlyce_dq |
+ cal2_dlyce_dqs |
+ cal2_rd_data_sel_edge |
+ cal4_dlyce_gate |
+ cal4_dlyrst_gate;
+
+ // SYN_NOTE: Can later recode to avoid combinational path
+ assign idel_set_wait = dlyce_or || (idel_set_cnt != IDEL_SET_VAL);
+
+ always @(posedge clkdiv)
+ if (rstdiv)
+ idel_set_cnt <= 4'b0000;
+ else if (dlyce_or)
+ idel_set_cnt <= 4'b0000;
+ else if (idel_set_cnt != IDEL_SET_VAL)
+ idel_set_cnt <= idel_set_cnt + 1;
+
+ // generate request to PHY_INIT logic to issue auto-refresh
+ // used by certain states to force prech/auto-refresh part way through
+ // calibration to avoid a tRAS violation (which will happen if that
+ // stage of calibration lasts long enough). This signal must meet the
+ // following requirements: (1) only transition from 0->1 when the refresh
+ // request is needed, (2) stay at 1 and only transition 1->0 when
+ // CALIB_REF_DONE is asserted
+ always @(posedge clkdiv)
+ if (rstdiv)
+ calib_ref_req <= 1'b0;
+ else
+ calib_ref_req <= cal1_ref_req | cal2_ref_req | cal4_ref_req;
+
+ // stage 1 calibration requests auto-refresh every 4 bits
+ generate
+ if (DQ_BITS < 2) begin: gen_cal1_refresh_dq_lte4
+ assign cal1_refresh = 1'b0;
+ end else begin: gen_cal1_refresh_dq_gt4
+ assign cal1_refresh = (next_count_dq[1:0] == 2'b00);
+ end
+ endgenerate
+
+ //***************************************************************************
+ // First stage calibration: DQ-DQS
+ // Definitions:
+ // edge: detected when varying IDELAY, and current capture data != prev
+ // capture data
+ // valid bit window: detected when current capture data == prev capture
+ // data for more than half the bit time
+ // starting conditions for DQS-DQ phase:
+ // case 1: when DQS starts somewhere in rising edge bit window, or
+ // on the right edge of the rising bit window.
+ // case 2: when DQS starts somewhere in falling edge bit window, or
+ // on the right edge of the falling bit window.
+ // Algorithm Description:
+ // 1. Increment DQ IDELAY until we find an edge.
+ // 2. While we're finding the first edge, note whether a valid bit window
+ // has been detected before we found an edge. If so, then figure out if
+ // this is the rising or falling bit window. If rising, then our starting
+ // DQS-DQ phase is case 1. If falling, then it's case 2. If don't detect
+ // a valid bit window, then we must have started on the edge of a window.
+ // Need to wait until later on to decide which case we are.
+ // - Store FIRST_EDGE IDELAY value
+ // 3. Now look for second edge.
+ // 4. While we're finding the second edge, note whether valid bit window
+ // is detected. If so, then use to, along with results from (2) to figure
+ // out what the starting case is. If in rising bit window, then we're in
+ // case 2. If falling, then case 1.
+ // - Store SECOND_EDGE IDELAY value
+ // NOTES:
+ // a. Finding two edges allows us to calculate the bit time (although
+ // not the "same" bit time polarity - need to investigate this
+ // more).
+ // b. If we run out of taps looking for the second edge, then the bit
+ // time must be too long (>= 2.5ns, and DQS-DQ starting phase must be
+ // case 1).
+ // 5. Calculate absolute amount to delay DQ as:
+ // If second edge found, and case 1:
+ // - DQ_IDELAY = FIRST_EDGE - 0.5*(SECOND_EDGE - FIRST_EDGE)
+ // If second edge found, and case 2:
+ // - DQ_IDELAY = SECOND_EDGE - 0.5*(SECOND_EDGE - FIRST_EDGE)
+ // If second edge not found, then need to make an approximation on
+ // how much to shift by (should be okay, because we have more timing
+ // margin):
+ // - DQ_IDELAY = FIRST_EDGE - 0.5 * (bit_time)
+ // NOTE: Does this account for either case 1 or case 2?????
+ // NOTE: It's also possible even when we find the second edge, that
+ // to instead just use half the bit time to subtract from either
+ // FIRST or SECOND_EDGE. Finding the actual bit time (which is
+ // what (SECOND_EDGE - FIRST_EDGE) is, is slightly more accurate,
+ // since it takes into account duty cycle distortion.
+ // 6. Repeat for each DQ in current DQS set.
+ //***************************************************************************
+
+ //*****************************************************************
+ // for first stage calibration - used for checking if DQS is aligned to the
+ // particular DQ, such that we're in the data valid window. Basically, this
+ // is one giant MUX.
+ // = [falling data, rising data]
+ // = [0, 1] = rising DQS aligned in proper (rising edge) bit window
+ // = [1, 0] = rising DQS aligned in wrong (falling edge) bit window
+ // = [0, 0], or [1,1] = in uncertain region between windows
+ //*****************************************************************
+
+ // SYN_NOTE: May have to split this up into multiple levels - MUX can get
+ // very wide - as wide as the data bus width
+ always @(posedge clkdiv)
+ cal1_data_chk_r <= {rd_data_fall_1x_r[next_count_dq],
+ rd_data_rise_1x_r[next_count_dq]};
+
+ //*****************************************************************
+ // determine when an edge has occurred - when either the current value
+ // is different from the previous latched value or when the DATA_CHK
+ // outputs are the same (rare, but indicates that we're at an edge)
+ // This is only valid when the IDELAY output and propagation of the
+ // data through the capture flops has had a chance to settle out.
+ //*****************************************************************
+
+ // write CAL1_DETECT_EDGE and CAL1_DETECT_STABLE in such a way that
+ // if X's are captured on the bus during functional simulation, that
+ // the logic will register this as an edge detected. Do this to allow
+ // use of this HDL with Denali memory models (Denali models drive DQ
+ // to X's on both edges of the data valid window to simulate jitter)
+ // This is only done for functional simulation purposes. **Should not**
+ // make the final synthesized logic more complicated, but it does make
+ // the HDL harder to understand b/c we have to "phrase" the logic
+ // slightly differently than when not worrying about X's
+ always @(*) begin
+ // no edge found if: (1) we have recorded prev edge, and rise
+ // data == fall data, (2) we haven't yet recorded prev edge, but
+ // rise/fall data is equal to either [0,1] or [1,0] (i.e. rise/fall
+ // data isn't either X's, or [0,0] or [1,1], which indicates we're
+ // in the middle of an edge, since normally rise != fall data for stg1)
+ if ((cal1_data_chk_last_valid &&
+ (cal1_data_chk_r == cal1_data_chk_last)) ||
+ (!cal1_data_chk_last_valid &&
+ ((cal1_data_chk_r == 2'b01) || (cal1_data_chk_r == 2'b10))))
+ cal1_detect_edge = 1'b0;
+ else
+ cal1_detect_edge = 1'b1;
+ end
+
+ always @(*) begin
+ // assert if we've found a region where data valid window is stable
+ // over consecutive IDELAY taps, and either rise/fall = [1,0], or [0,1]
+ if ((cal1_data_chk_last_valid &&
+ (cal1_data_chk_r == cal1_data_chk_last)) &&
+ ((cal1_data_chk_r == 2'b01) || (cal1_data_chk_r == 2'b10)))
+ cal1_detect_stable <= 1'b1;
+ else
+ cal1_detect_stable <= 1'b0;
+ end
+
+ //*****************************************************************
+ // Find valid window: keep track of how long we've been in the same data
+ // window. If it's been long enough, then declare that we've found a valid
+ // window. Also returns whether we found a rising or falling window (only
+ // valid when found_window is asserted)
+ //*****************************************************************
+
+ always @(posedge clkdiv) begin
+ if (cal1_state == CAL1_INIT) begin
+ cal1_window_cnt <= 4'b0000;
+ cal1_found_window <= 1'b0;
+ cal1_found_rising <= 1'bx;
+ end else if (!cal1_data_chk_last_valid) begin
+ // if we haven't stored a previous value of CAL1_DATA_CHK (or it got
+ // invalidated because we detected an edge, and are now looking for the
+ // second edge), then make sure FOUND_WINDOW deasserted on following
+ // clock edge (to avoid finding a false window immediately after finding
+ // an edge). Note that because of jitter, it's possible to not find an
+ // edge at the end of the IDELAY increment settling time, but to find an
+ // edge on the next clock cycle (e.g. during CAL1_FIND_FIRST_EDGE)
+ cal1_window_cnt <= 4'b0000;
+ cal1_found_window <= 1'b0;
+ cal1_found_rising <= 1'bx;
+ end else if (((cal1_state == CAL1_FIRST_EDGE_IDEL_WAIT) ||
+ (cal1_state == CAL1_SECOND_EDGE_IDEL_WAIT)) &&
+ !idel_set_wait) begin
+ // while finding the first and second edges, see if we can detect a
+ // stable bit window (occurs over MIN_WIN_SIZE number of taps). If
+ // so, then we're away from an edge, and can conclusively determine the
+ // starting DQS-DQ phase.
+ if (cal1_detect_stable) begin
+ cal1_window_cnt <= cal1_window_cnt + 1;
+ if (cal1_window_cnt == MIN_WIN_SIZE-1) begin
+ cal1_found_window <= 1'b1;
+ if (cal1_data_chk_r == 2'b01)
+ cal1_found_rising <= 1'b1;
+ else
+ cal1_found_rising <= 1'b0;
+ end
+ end else begin
+ // otherwise, we're not in a data valid window, reset the window
+ // counter, and indicate we're not currently in window. This should
+ // happen by design at least once after finding the first edge.
+ cal1_window_cnt <= 4'b0000;
+ cal1_found_window <= 1'b0;
+ cal1_found_rising <= 1'bx;
+ end
+ end
+ end
+
+ //*****************************************************************
+ // keep track of edge tap counts found, and whether we've
+ // incremented to the maximum number of taps allowed
+ //*****************************************************************
+
+ always @(posedge clkdiv)
+ if (cal1_state == CAL1_INIT) begin
+ cal1_idel_tap_limit_hit <= 1'b0;
+ cal1_idel_tap_cnt <= 6'b000000;
+ end else if (cal1_dlyce_dq) begin
+ if (cal1_dlyinc_dq) begin
+ cal1_idel_tap_cnt <= cal1_idel_tap_cnt + 1;
+ cal1_idel_tap_limit_hit <= (cal1_idel_tap_cnt == 6'b111110);
+ end else begin
+ cal1_idel_tap_cnt <= cal1_idel_tap_cnt - 1;
+ cal1_idel_tap_limit_hit <= 1'b0;
+ end
+ end
+
+ //*****************************************************************
+ // Pipeline for better timing - amount to decrement by if second
+ // edge not found
+ //*****************************************************************
+ // if only one edge found (possible for low frequencies), then:
+ // 1. Assume starting DQS-DQ phase has DQS in DQ window (aka "case 1")
+ // 2. We have to decrement by (63 - first_edge_tap_cnt) + (BIT_TIME_TAPS/2)
+ // (i.e. decrement by 63-first_edge_tap_cnt to get to right edge of
+ // DQ window. Then decrement again by (BIT_TIME_TAPS/2) to get to center
+ // of DQ window.
+ // 3. Clamp the above value at 63 to ensure we don't underflow IDELAY
+ // (note: clamping happens in the CAL1 state machine)
+ always @(posedge clkdiv)
+ cal1_low_freq_idel_dec
+ <= (7'b0111111 - {1'b0, cal1_first_edge_tap_cnt}) +
+ (BIT_TIME_TAPS/2);
+
+ //*****************************************************************
+ // Keep track of max taps used during stage 1, use this to limit
+ // the number of taps that can be used in stage 2
+ //*****************************************************************
+
+ always @(posedge clkdiv)
+ if (rstdiv) begin
+ cal1_idel_max_tap <= 6'b000000;
+ cal1_idel_max_tap_we <= 1'b0;
+ end else begin
+ // pipeline latch enable for CAL1_IDEL_MAX_TAP - we have plenty
+ // of time, tap count gets updated, then dead cycles waiting for
+ // IDELAY output to settle
+ cal1_idel_max_tap_we <= (cal1_idel_max_tap < cal1_idel_tap_cnt);
+ // record maximum # of taps used for stg 1 cal
+ if ((cal1_state == CAL1_DONE) && cal1_idel_max_tap_we)
+ cal1_idel_max_tap <= cal1_idel_tap_cnt;
+ end
+
+ //*****************************************************************
+
+ always @(posedge clkdiv)
+ if (rstdiv) begin
+ calib_done[0] <= 1'b0;
+ calib_done_tmp[0] <= 1'bx;
+ calib_err[0] <= 1'b0;
+ count_dq <= {DQ_BITS{1'b0}};
+ next_count_dq <= {DQ_BITS{1'b0}};
+ cal1_bit_time_tap_cnt <= 6'bxxxxxx;
+ cal1_data_chk_last <= 2'bxx;
+ cal1_data_chk_last_valid <= 1'bx;
+ cal1_dlyce_dq <= 1'b0;
+ cal1_dlyinc_dq <= 1'b0;
+ cal1_dqs_dq_init_phase <= 1'bx;
+ cal1_first_edge_done <= 1'bx;
+ cal1_found_second_edge <= 1'bx;
+ cal1_first_edge_tap_cnt <= 6'bxxxxxx;
+ cal1_idel_dec_cnt <= 7'bxxxxxxx;
+ cal1_idel_inc_cnt <= 6'bxxxxxx;
+ cal1_ref_req <= 1'b0;
+ cal1_state <= CAL1_IDLE;
+ end else begin
+ // default values for all "pulse" outputs
+ cal1_ref_req <= 1'b0;
+ cal1_dlyce_dq <= 1'b0;
+ cal1_dlyinc_dq <= 1'b0;
+
+ case (cal1_state)
+ CAL1_IDLE: begin
+ count_dq <= {DQ_BITS{1'b0}};
+ next_count_dq <= {DQ_BITS{1'b0}};
+ if (calib_start[0]) begin
+ calib_done[0] <= 1'b0;
+ calib_done_tmp[0] <= 1'b0;
+ cal1_state <= CAL1_INIT;
+ end
+ end
+
+ CAL1_INIT: begin
+ cal1_data_chk_last_valid <= 1'b0;
+ cal1_found_second_edge <= 1'b0;
+ cal1_dqs_dq_init_phase <= 1'b0;
+ cal1_idel_inc_cnt <= 6'b000000;
+ cal1_state <= CAL1_INC_IDEL;
+ end
+
+ // increment DQ IDELAY so that either: (1) DQS starts somewhere in
+ // first rising DQ window, or (2) DQS starts in first falling DQ
+ // window. The amount to shift is frequency dependent (and is either
+ // precalculated by MIG or possibly adjusted by the user)
+ CAL1_INC_IDEL:
+ if ((cal1_idel_inc_cnt == DQ_IDEL_INIT) && !idel_set_wait) begin
+ cal1_state <= CAL1_FIND_FIRST_EDGE;
+ end else if (cal1_idel_inc_cnt != DQ_IDEL_INIT) begin
+ cal1_idel_inc_cnt <= cal1_idel_inc_cnt + 1;
+ cal1_dlyce_dq <= 1'b1;
+ cal1_dlyinc_dq <= 1'b1;
+ end
+
+ // look for first edge
+ CAL1_FIND_FIRST_EDGE: begin
+ // Determine DQS-DQ phase if we can detect enough of a valid window
+ if (cal1_found_window)
+ cal1_dqs_dq_init_phase <= ~cal1_found_rising;
+ // find first edge - if found then record position
+ if (cal1_detect_edge) begin
+ cal1_state <= CAL1_FOUND_FIRST_EDGE_WAIT;
+ cal1_first_edge_done <= 1'b0;
+ cal1_first_edge_tap_cnt <= cal1_idel_tap_cnt;
+ cal1_data_chk_last_valid <= 1'b0;
+ end else begin
+ // otherwise, store the current value of DATA_CHK, increment
+ // DQ IDELAY, and compare again
+ cal1_state <= CAL1_FIRST_EDGE_IDEL_WAIT;
+ cal1_data_chk_last <= cal1_data_chk_r;
+ // avoid comparing against DATA_CHK_LAST for previous iteration
+ cal1_data_chk_last_valid <= 1'b1;
+ cal1_dlyce_dq <= 1'b1;
+ cal1_dlyinc_dq <= 1'b1;
+ end
+ end
+
+ // wait for DQ IDELAY to settle
+ CAL1_FIRST_EDGE_IDEL_WAIT:
+ if (!idel_set_wait)
+ cal1_state <= CAL1_FIND_FIRST_EDGE;
+
+ // delay state between finding first edge and looking for second
+ // edge. Necessary in order to invalidate CAL1_FOUND_WINDOW before
+ // starting to look for second edge
+ CAL1_FOUND_FIRST_EDGE_WAIT:
+ cal1_state <= CAL1_FIND_SECOND_EDGE;
+
+ // Try and find second edge
+ CAL1_FIND_SECOND_EDGE: begin
+ // When looking for 2nd edge, first make sure data stabilized (by
+ // detecting valid data window) - needed to avoid false edges
+ if (cal1_found_window) begin
+ cal1_first_edge_done <= 1'b1;
+ cal1_dqs_dq_init_phase <= cal1_found_rising;
+ end
+ // exit if run out of taps to increment
+ if (cal1_idel_tap_limit_hit)
+ cal1_state <= CAL1_CALC_IDEL;
+ else begin
+ // found second edge, record the current edge count
+ if (cal1_first_edge_done && cal1_detect_edge) begin
+ cal1_state <= CAL1_CALC_IDEL;
+ cal1_found_second_edge <= 1'b1;
+ cal1_bit_time_tap_cnt <= cal1_idel_tap_cnt -
+ cal1_first_edge_tap_cnt + 1;
+ end else begin
+ cal1_state <= CAL1_SECOND_EDGE_IDEL_WAIT;
+ cal1_data_chk_last <= cal1_data_chk_r;
+ cal1_data_chk_last_valid <= 1'b1;
+ cal1_dlyce_dq <= 1'b1;
+ cal1_dlyinc_dq <= 1'b1;
+ end
+ end
+ end
+
+ // wait for DQ IDELAY to settle, then store ISERDES output
+ CAL1_SECOND_EDGE_IDEL_WAIT:
+ if (!idel_set_wait)
+ cal1_state <= CAL1_FIND_SECOND_EDGE;
+
+ // pipeline delay state to calculate amount to decrement DQ IDELAY
+ // NOTE: We're calculating the amount to decrement by, not the
+ // absolute setting for DQ IDELAY
+ CAL1_CALC_IDEL: begin
+ // if two edges found
+ if (cal1_found_second_edge)
+ // case 1: DQS was in DQ window to start with. First edge found
+ // corresponds to left edge of DQ rising window. Backup by 1.5*BT
+ // NOTE: In this particular case, it is possible to decrement
+ // "below 0" in the case where DQS delay is less than 0.5*BT,
+ // need to limit decrement to prevent IDELAY tap underflow
+ if (!cal1_dqs_dq_init_phase)
+ cal1_idel_dec_cnt <= {1'b0, cal1_bit_time_tap_cnt} +
+ {1'b0, (cal1_bit_time_tap_cnt >> 1)};
+ // case 2: DQS was in wrong DQ window (in DQ falling window).
+ // First edge found is right edge of DQ rising window. Second
+ // edge is left edge of DQ rising window. Backup by 0.5*BT
+ else
+ cal1_idel_dec_cnt <= {1'b0, (cal1_bit_time_tap_cnt >> 1)};
+ // if only one edge found - assume will always be case 1 - DQS in
+ // DQS window. Case 2 only possible if path delay on DQS > 5ns
+ else
+ cal1_idel_dec_cnt <= cal1_low_freq_idel_dec;
+ cal1_state <= CAL1_DEC_IDEL;
+ end
+
+ // decrement DQ IDELAY for final adjustment
+ CAL1_DEC_IDEL:
+ // once adjustment is complete, we're done with calibration for
+ // this DQ, now return to IDLE state and repeat for next DQ
+ // Add underflow protection for case of 2 edges found and DQS
+ // starting in DQ window (see comments for above state) - note we
+ // have to take into account delayed value of CAL1_IDEL_TAP_CNT -
+ // gets updated one clock cycle after CAL1_DLYCE/INC_DQ
+ if ((cal1_idel_dec_cnt == 7'b0000000) ||
+ (cal1_dlyce_dq && (cal1_idel_tap_cnt == 6'b000001))) begin
+ cal1_state <= CAL1_DONE;
+ // stop when all DQ's calibrated, or DQ[0] cal'ed (for sim)
+ if ((count_dq == DQ_WIDTH-1) || (SIM_ONLY != 0))
+ calib_done_tmp[0] <= 1'b1;
+ else
+ // need for VHDL simulation to prevent out-of-index error
+ next_count_dq <= count_dq + 1;
+ end else begin
+ // keep decrementing until final tap count reached
+ cal1_idel_dec_cnt <= cal1_idel_dec_cnt - 1;
+ cal1_dlyce_dq <= 1'b1;
+ cal1_dlyinc_dq <= 1'b0;
+ end
+
+ // delay state to allow count_dq and DATA_CHK to point to the next
+ // DQ bit (allows us to potentially begin checking for an edge on
+ // next DQ right away).
+ CAL1_DONE:
+ if (!idel_set_wait) begin
+ count_dq <= next_count_dq;
+ if (calib_done_tmp[0]) begin
+ calib_done[0] <= 1'b1;
+ cal1_state <= CAL1_IDLE;
+ end else begin
+ // request auto-refresh after every 8-bits calibrated to
+ // avoid tRAS violation
+ if (cal1_refresh) begin
+ cal1_ref_req <= 1'b1;
+ if (calib_ref_done)
+ cal1_state <= CAL1_INIT;
+ end else
+ // if no need this time for refresh, proceed to next bit
+ cal1_state <= CAL1_INIT;
+ end
+ end
+ endcase
+ end
+
+ //***************************************************************************
+ // Second stage calibration: DQS-FPGA Clock
+ // Algorithm Description:
+ // 1. Assumes a training pattern that will produce a pattern oscillating at
+ // half the core clock frequency each on rise and fall outputs, and such
+ // that rise and fall outputs are 180 degrees out of phase from each
+ // other. Note that since the calibration logic runs at half the speed
+ // of the interface, expect that data sampled with the slow clock always
+ // to be constant (either always = 1, or = 0, and rise data != fall data)
+ // unless we cross the edge of the data valid window
+ // 2. Start by setting RD_DATA_SEL = 0. This selects the rising capture data
+ // sync'ed to rising edge of core clock, and falling edge data sync'ed
+ // to falling edge of core clock
+ // 3. Start looking for an edge. An edge is defined as either: (1) a
+ // change in capture value or (2) an invalid capture value (e.g. rising
+ // data != falling data for that same clock cycle).
+ // 4. If an edge is found, go to step (6). If edge hasn't been found, then
+ // set RD_DATA_SEL = 1, and try again.
+ // 5. If no edge is found, then increment IDELAY and return to step (3)
+ // 6. If an edge if found, then invert RD_DATA_SEL - this shifts the
+ // capture point 180 degrees from the edge of the window (minus duty
+ // cycle distortion, delay skew between rising/falling edge capture
+ // paths, etc.)
+ // 7. If no edge is found by CAL2_IDEL_TAP_LIMIT (= 63 - # taps used for
+ // stage 1 calibration), then decrement IDELAY (without reinverting
+ // RD_DATA_SEL) by CAL2_IDEL_TAP_LIMIT/2. This guarantees we at least
+ // have CAL2_IDEL_TAP_LIMIT/2 of slack both before and after the
+ // capture point (not optimal, but best we can do not having found an
+ // of the window). This happens only for very low frequencies.
+ // 8. Repeat for each DQS group.
+ // NOTE: Step 6 is not optimal. A better (and perhaps more complicated)
+ // algorithm might be to find both edges of the data valid window (using
+ // the same polarity of RD_DATA_SEL), and then decrement to the midpoint.
+ //***************************************************************************
+
+ // RD_DATA_SEL should be tagged with FROM-TO (multi-cycle) constraint in
+ // UCF file to relax timing. This net is "pseudo-static" (after value is
+ // changed, FSM waits number of cycles before using the output).
+ // Note that we are adding one clock cycle of delay (to isolate it from
+ // the other logic CAL2_RD_DATA_SEL feeds), make sure FSM waits long
+ // enough to compensate (by default it does, it waits a few cycles more
+ // than minimum # of clock cycles)
+ genvar rd_i;
+ generate
+ for (rd_i = 0; rd_i < DQS_WIDTH; rd_i = rd_i+1) begin: gen_rd_data_sel
+ FDRSE u_ff_rd_data_sel
+ (
+ .Q (rd_data_sel[rd_i]),
+ .C (clkdiv),
+ .CE (1'b1),
+ .D (cal2_rd_data_sel[rd_i]),
+ .R (1'b0),
+ .S (1'b0)
+ ) /* synthesis syn_preserve = 1 */
+ /* synthesis syn_replicate = 0 */;
+ end
+ endgenerate
+
+ //*****************************************************************
+ // Max number of taps used for stg2 cal dependent on number of taps
+ // used for stg1 (give priority to stg1 cal - let it use as many
+ // taps as it needs - the remainder of the IDELAY taps can be used
+ // by stg2)
+ //*****************************************************************
+
+ always @(posedge clkdiv)
+ cal2_idel_tap_limit <= 6'b111111 - cal1_idel_max_tap;
+
+ //*****************************************************************
+ // second stage calibration uses readback pattern of "1100" (i.e.
+ // 1st rising = 1, 1st falling = 1, 2nd rising = 0, 2nd falling = 0)
+ // only look at the first bit of each DQS group
+ //*****************************************************************
+
+ // deasserted when captured data has changed since IDELAY was
+ // incremented, or when we're right on the edge (i.e. rise data =
+ // fall data).
+ assign cal2_detect_edge =
+ ((((rdd_rise_q1 != cal2_rd_data_rise_last_pos) ||
+ (rdd_fall_q1 != cal2_rd_data_fall_last_pos)) &&
+ cal2_rd_data_last_valid_pos && (!cal2_curr_sel)) ||
+ (((rdd_rise_q1 != cal2_rd_data_rise_last_neg) ||
+ (rdd_fall_q1 != cal2_rd_data_fall_last_neg)) &&
+ cal2_rd_data_last_valid_neg && (cal2_curr_sel)) ||
+ (rdd_rise_q1 != rdd_fall_q1));
+
+ //*****************************************************************
+ // keep track of edge tap counts found, and whether we've
+ // incremented to the maximum number of taps allowed
+ // NOTE: Assume stage 2 cal always increments the tap count (never
+ // decrements) when searching for edge of the data valid window
+ //*****************************************************************
+
+ always @(posedge clkdiv)
+ if (cal2_state == CAL2_INIT) begin
+ cal2_idel_tap_limit_hit <= 1'b0;
+ cal2_idel_tap_cnt <= 6'b000000;
+ end else if (cal2_dlyce_dqs) begin
+ cal2_idel_tap_cnt <= cal2_idel_tap_cnt + 1;
+ cal2_idel_tap_limit_hit <= (cal2_idel_tap_cnt ==
+ cal2_idel_tap_limit - 1);
+ end
+
+ //*****************************************************************
+
+ always @(posedge clkdiv)
+ if (rstdiv) begin
+ calib_done[1] <= 1'b0;
+ calib_done_tmp[1] <= 1'bx;
+ calib_err[1] <= 1'b0;
+ count_dqs <= 'b0;
+ next_count_dqs <= 'b0;
+ cal2_dlyce_dqs <= 1'b0;
+ cal2_dlyinc_dqs <= 1'b0;
+ cal2_idel_dec_cnt <= 6'bxxxxxx;
+ cal2_rd_data_last_valid_neg <= 1'bx;
+ cal2_rd_data_last_valid_pos <= 1'bx;
+ cal2_rd_data_sel <= 'b0;
+ cal2_ref_req <= 1'b0;
+ cal2_state <= CAL2_IDLE;
+ end else begin
+ cal2_ref_req <= 1'b0;
+ cal2_dlyce_dqs <= 1'b0;
+ cal2_dlyinc_dqs <= 1'b0;
+
+ case (cal2_state)
+ CAL2_IDLE: begin
+ count_dqs <= 'b0;
+ next_count_dqs <= 'b0;
+ if (calib_start[1]) begin
+ cal2_rd_data_sel <= {DQS_WIDTH{1'b0}};
+ calib_done[1] <= 1'b0;
+ calib_done_tmp[1] <= 1'b0;
+ cal2_state <= CAL2_INIT;
+ end
+ end
+
+ // Pass through this state every time we calibrate a new DQS group
+ CAL2_INIT: begin
+ cal2_curr_sel <= 1'b0;
+ cal2_rd_data_last_valid_neg <= 1'b0;
+ cal2_rd_data_last_valid_pos <= 1'b0;
+ cal2_state <= CAL2_INIT_IDEL_WAIT;
+ end
+
+ // Stall state only used if calibration run more than once. Can take
+ // this state out if design never runs calibration more than once.
+ // We need this state to give time for MUX'ed data to settle after
+ // resetting RD_DATA_SEL
+ CAL2_INIT_IDEL_WAIT:
+ if (!idel_set_wait)
+ cal2_state <= CAL2_FIND_EDGE_POS;
+
+ // Look for an edge - first check "positive-edge" stage 2 capture
+ CAL2_FIND_EDGE_POS: begin
+ // if found an edge, then switch to the opposite edge stage 2
+ // capture and we're done - no need to decrement the tap count,
+ // since switching to the opposite edge will shift the capture
+ // point by 180 degrees
+ if (cal2_detect_edge) begin
+ cal2_curr_sel <= 1'b1;
+ cal2_state <= CAL2_DONE;
+ // set all DQS groups to be the same for simulation
+ if (SIM_ONLY != 0)
+ cal2_rd_data_sel <= {DQS_WIDTH{1'b1}};
+ else
+ cal2_rd_data_sel[count_dqs] <= 1'b1;
+ if ((count_dqs == DQS_WIDTH-1) || (SIM_ONLY != 0))
+ calib_done_tmp[1] <= 1'b1;
+ else
+ // MIG 2.1: Fix for simulation out-of-bounds error when
+ // SIM_ONLY=0, and DQS_WIDTH=(power of 2) (needed for VHDL)
+ next_count_dqs <= count_dqs + 1;
+ end else begin
+ // otherwise, invert polarity of stage 2 capture and look for
+ // an edge with opposite capture clock polarity
+ cal2_curr_sel <= 1'b1;
+ cal2_rd_data_sel[count_dqs] <= 1'b1;
+ cal2_state <= CAL2_FIND_EDGE_IDEL_WAIT_POS;
+ cal2_rd_data_rise_last_pos <= rdd_rise_q1;
+ cal2_rd_data_fall_last_pos <= rdd_fall_q1;
+ cal2_rd_data_last_valid_pos <= 1'b1;
+ end
+ end
+
+ // Give time to switch from positive-edge to negative-edge second
+ // stage capture (need time for data to filter though pipe stages)
+ CAL2_FIND_EDGE_IDEL_WAIT_POS:
+ if (!idel_set_wait)
+ cal2_state <= CAL2_FIND_EDGE_NEG;
+
+ // Look for an edge - check "negative-edge" stage 2 capture
+ CAL2_FIND_EDGE_NEG:
+ if (cal2_detect_edge) begin
+ cal2_curr_sel <= 1'b0;
+ cal2_state <= CAL2_DONE;
+ // set all DQS groups to be the same for simulation
+ if (SIM_ONLY != 0)
+ cal2_rd_data_sel <= {DQS_WIDTH{1'b0}};
+ else
+ cal2_rd_data_sel[count_dqs] <= 1'b0;
+ if ((count_dqs == DQS_WIDTH-1) || (SIM_ONLY != 0))
+ calib_done_tmp[1] <= 1'b1;
+ else
+ // MIG 2.1: Fix for simulation out-of-bounds error when
+ // SIM_ONLY=0, and DQS_WIDTH=(power of 2) (needed for VHDL)
+ next_count_dqs <= count_dqs + 1;
+ end else if (cal2_idel_tap_limit_hit) begin
+ // otherwise, if we've run out of taps, then immediately
+ // backoff by half # of taps used - that's our best estimate
+ // for optimal calibration point. Doesn't matter whether which
+ // polarity we're using for capture (we don't know which one is
+ // best to use)
+ cal2_idel_dec_cnt <= {1'b0, cal2_idel_tap_limit[5:1]};
+ cal2_state <= CAL2_DEC_IDEL;
+ if ((count_dqs == DQS_WIDTH-1) || (SIM_ONLY != 0))
+ calib_done_tmp[1] <= 1'b1;
+ else
+ // MIG 2.1: Fix for simulation out-of-bounds error when
+ // SIM_ONLY=0, and DQS_WIDTH=(power of 2) (needed for VHDL)
+ next_count_dqs <= count_dqs + 1;
+ end else begin
+ // otherwise, increment IDELAY, and start looking for edge again
+ cal2_curr_sel <= 1'b0;
+ cal2_rd_data_sel[count_dqs] <= 1'b0;
+ cal2_state <= CAL2_FIND_EDGE_IDEL_WAIT_NEG;
+ cal2_rd_data_rise_last_neg <= rdd_rise_q1;
+ cal2_rd_data_fall_last_neg <= rdd_fall_q1;
+ cal2_rd_data_last_valid_neg <= 1'b1;
+ cal2_dlyce_dqs <= 1'b1;
+ cal2_dlyinc_dqs <= 1'b1;
+ end
+
+ CAL2_FIND_EDGE_IDEL_WAIT_NEG:
+ if (!idel_set_wait)
+ cal2_state <= CAL2_FIND_EDGE_POS;
+
+ // if no edge found, then decrement by half # of taps used
+ CAL2_DEC_IDEL: begin
+ if (cal2_idel_dec_cnt == 6'b000000)
+ cal2_state <= CAL2_DONE;
+ else begin
+ cal2_idel_dec_cnt <= cal2_idel_dec_cnt - 1;
+ cal2_dlyce_dqs <= 1'b1;
+ cal2_dlyinc_dqs <= 1'b0;
+ end
+ end
+
+ // delay state to allow count_dqs and ISERDES data to point to next
+ // DQ bit (DQS group) before going to INIT
+ CAL2_DONE:
+ if (!idel_set_wait) begin
+ count_dqs <= next_count_dqs;
+ if (calib_done_tmp[1]) begin
+ calib_done[1] <= 1'b1;
+ cal2_state <= CAL2_IDLE;
+ end else begin
+ // request auto-refresh after every DQS group calibrated to
+ // avoid tRAS violation
+ cal2_ref_req <= 1'b1;
+ if (calib_ref_done)
+ cal2_state <= CAL2_INIT;
+ end
+ end
+ endcase
+ end
+
+ //***************************************************************************
+ // Stage 3 calibration: Read Enable
+ // Description:
+ // read enable calibration determines the "round-trip" time (in # of CLK0
+ // cycles) between when a read command is issued by the controller, and
+ // when the corresponding read data is synchronized by into the CLK0 domain
+ // this is a long delay chain to delay read enable signal from controller/
+ // initialization logic (i.e. this is used for both initialization and
+ // during normal controller operation). Stage 3 calibration logic decides
+ // which delayed version is appropriate to use (which is affected by the
+ // round trip delay of DQ/DQS) as a "valid" signal to tell rest of logic
+ // when the captured data output from ISERDES is valid.
+ //***************************************************************************
+
+ //*****************************************************************
+ // Delay chains: Use shift registers
+ // Two sets of delay chains are used:
+ // 1. One to delay RDEN from PHY_INIT module for calibration
+ // purposes (delay required for RDEN for calibration is different
+ // than during normal operation)
+ // 2. One per DQS group to delay RDEN from controller for normal
+ // operation - the value to delay for each DQS group can be different
+ // as is determined during calibration
+ //*****************************************************************
+
+ //*****************************************************************
+ // First delay chain, use only for calibration
+ // input = asserted on rising edge of RDEN from PHY_INIT module
+ //*****************************************************************
+
+ always @(posedge clk) begin
+ ctrl_rden_r <= ctrl_rden;
+ phy_init_rden_r <= phy_init_rden;
+ phy_init_rden_r1 <= phy_init_rden_r;
+ calib_rden_edge_r <= phy_init_rden_r & ~phy_init_rden_r1;
+ end
+
+ // Calibration shift register used for both Stage 3 and Stage 4 cal
+ // (not strictly necessary for stage 4, but use as an additional check
+ // to make sure we're checking for correct data on the right clock cycle)
+ always @(posedge clkdiv)
+ if (!calib_done[2])
+ calib_rden_srl_a <= cal3_rden_srl_a;
+ else
+ calib_rden_srl_a <= cal4_rden_srl_a;
+
+ // Flops for targetting of multi-cycle path in UCF
+ genvar cal_rden_ff_i;
+ generate
+ for (cal_rden_ff_i = 0; cal_rden_ff_i < 5;
+ cal_rden_ff_i = cal_rden_ff_i+1) begin: gen_cal_rden_dly
+ FDRSE u_ff_cal_rden_dly
+ (
+ .Q (calib_rden_srl_a_r[cal_rden_ff_i]),
+ .C (clkdiv),
+ .CE (1'b1),
+ .D (calib_rden_srl_a[cal_rden_ff_i]),
+ .R (1'b0),
+ .S (1'b0)
+ ) /* synthesis syn_preserve = 1 */
+ /* synthesis syn_replicate = 0 */;
+ end
+ endgenerate
+
+ SRLC32E u_calib_rden_srl
+ (
+ .Q (calib_rden_srl_out),
+ .Q31 (),
+ .A (calib_rden_srl_a_r),
+ .CE (1'b1),
+ .CLK (clk),
+ .D (calib_rden_edge_r)
+ );
+
+ FDRSE u_calib_rden_srl_out_r
+ (
+ .Q (calib_rden_srl_out_r),
+ .C (clk),
+ .CE (1'b1),
+ .D (calib_rden_srl_out),
+ .R (1'b0),
+ .S (1'b0)
+ ) /* synthesis syn_preserve = 1 */;
+
+ // convert to CLKDIV domain. Two version are generated because we need
+ // to be able to tell exactly which fast (clk) clock cycle the read
+ // enable was asserted in. Only one of CALIB_DATA_VALID or
+ // CALIB_DATA_VALID_STGD will be asserted for any given shift value
+ always @(posedge clk)
+ calib_rden_srl_out_r1 <= calib_rden_srl_out_r;
+
+ always @(posedge clkdiv) begin
+ calib_rden_valid <= calib_rden_srl_out_r;
+ calib_rden_valid_stgd <= calib_rden_srl_out_r1;
+ end
+
+ //*****************************************************************
+ // Second set of delays chain, use for normal reads
+ // input = RDEN from controller
+ //*****************************************************************
+
+ // Flops for targetting of multi-cycle path in UCF
+ genvar rden_ff_i;
+ generate
+ for (rden_ff_i = 0; rden_ff_i < 5*DQS_WIDTH;
+ rden_ff_i = rden_ff_i+1) begin: gen_rden_dly
+ FDRSE u_ff_rden_dly
+ (
+ .Q (rden_dly_r[rden_ff_i]),
+ .C (clkdiv),
+ .CE (1'b1),
+ .D (rden_dly[rden_ff_i]),
+ .R (1'b0),
+ .S (1'b0)
+ ) /* synthesis syn_preserve = 1 */
+ /* synthesis syn_replicate = 0 */;
+ end
+ endgenerate
+
+ // NOTE: Comment this section explaining purpose of SRL's
+ genvar rden_i;
+ generate
+ for (rden_i = 0; rden_i < DQS_WIDTH; rden_i = rden_i + 1) begin: gen_rden
+ SRLC32E u_rden_srl
+ (
+ .Q (rden_srl_out[rden_i]),
+ .Q31 (),
+ .A ({rden_dly_r[(rden_i*5)+4],
+ rden_dly_r[(rden_i*5)+3],
+ rden_dly_r[(rden_i*5)+2],
+ rden_dly_r[(rden_i*5)+1],
+ rden_dly_r[(rden_i*5)]}),
+ .CE (1'b1),
+ .CLK (clk),
+ .D (ctrl_rden_r)
+ );
+ FDRSE u_calib_rden_r
+ (
+ .Q (calib_rden[rden_i]),
+ .C (clk),
+ .CE (1'b1),
+ .D (rden_srl_out[rden_i]),
+ .R (1'b0),
+ .S (1'b0)
+ ) /* synthesis syn_preserve = 1 */;
+ end
+ endgenerate
+
+ //*****************************************************************
+ // indicates that current received data is the correct pattern. Check both
+ // rising and falling data for first DQ in each DQS group. Note that
+ // we're checking using a pipelined version of read data, so need to take
+ // this inherent delay into account in determining final read valid delay
+ // Data is written to the memory in the following order (first -> last):
+ // 0x1, 0xE, 0xE, 0x1, 0x1, 0xE, 0xE, 0x1
+ // Looking just at LSb, expect data in sequence (in binary):
+ // 1, 0, 0, 1, 1, 0, 0, 1
+ // Check for the presence of the first 7 words, and compensate read valid
+ // delay accordingly. Don't check last falling edge data, it may be
+ // corrupted by the DQS tri-state glitch at end of read postamble
+ // (glitch protection not yet active until stage 4 cal)
+ //*****************************************************************
+
+ always @(posedge clkdiv) begin
+ rdd_rise_q1_r <= rdd_rise_q1;
+ rdd_fall_q1_r <= rdd_fall_q1;
+ rdd_rise_q2_r <= rdd_rise_q2;
+ rdd_fall_q2_r <= rdd_fall_q2;
+ rdd_rise_q1_r1 <= rdd_rise_q1_r;
+ rdd_fall_q1_r1 <= rdd_fall_q1_r;
+ end
+
+ always @(posedge clkdiv) begin
+ // For the following sequence from memory:
+ // rise[0], fall[0], rise[1], fall[1]
+ // if data is aligned out of fabric ISERDES:
+ // RDD_RISE_Q2 = rise[0]
+ // RDD_FALL_Q2 = fall[0]
+ // RDD_RISE_Q1 = rise[1]
+ // RDD_FALL_Q1 = fall[1]
+ cal3_data_match <= ((rdd_rise_q2_r == 1) &&
+ (rdd_fall_q2_r == 0) &&
+ (rdd_rise_q1_r == 0) &&
+ (rdd_fall_q1_r == 1) &&
+ (rdd_rise_q2 == 1) &&
+ (rdd_fall_q2 == 0) &&
+ (rdd_rise_q1 == 0));
+
+ // if data is staggered out of fabric ISERDES:
+ // RDD_RISE_Q1_R = rise[0]
+ // RDD_FALL_Q1_R = fall[0]
+ // RDD_RISE_Q2 = rise[1]
+ // RDD_FALL_Q2 = fall[1]
+ cal3_data_match_stgd <= ((rdd_rise_q1_r1 == 1) &&
+ (rdd_fall_q1_r1 == 0) &&
+ (rdd_rise_q2_r == 0) &&
+ (rdd_fall_q2_r == 1) &&
+ (rdd_rise_q1_r == 1) &&
+ (rdd_fall_q1_r == 0) &&
+ (rdd_rise_q2 == 0));
+ end
+
+ assign cal3_rden_dly = cal3_rden_srl_a - CAL3_RDEN_SRL_DLY_DELTA;
+ assign cal3_data_valid = (calib_rden_valid | calib_rden_valid_stgd);
+ assign cal3_match_found
+ = ((calib_rden_valid && cal3_data_match) ||
+ (calib_rden_valid_stgd && cal3_data_match_stgd));
+
+ // when calibrating, check to see which clock cycle (after the read is
+ // issued) does the expected data pattern arrive. Record this result
+ // NOTE: Can add error checking here in case valid data not found on any
+ // of the available pipeline stages
+ always @(posedge clkdiv) begin
+ if (rstdiv) begin
+ cal3_rden_srl_a <= 5'bxxxxx;
+ cal3_state <= CAL3_IDLE;
+ calib_done[2] <= 1'b0;
+ calib_err_2[0] <= 1'b0;
+ count_rden <= {DQS_WIDTH{1'b0}};
+ rden_dly <= {5*DQS_WIDTH{1'b0}};
+ end else begin
+
+ case (cal3_state)
+ CAL3_IDLE: begin
+ count_rden <= {DQS_WIDTH{1'b0}};
+ if (calib_start[2]) begin
+ calib_done[2] <= 1'b0;
+ cal3_state <= CAL3_INIT;
+ end
+ end
+
+ CAL3_INIT: begin
+ cal3_rden_srl_a <= RDEN_BASE_DELAY;
+ // let SRL pipe clear after loading initial shift value
+ cal3_state <= CAL3_RDEN_PIPE_CLR_WAIT;
+ end
+
+ CAL3_DETECT:
+ if (cal3_data_valid)
+ // if match found at the correct clock cycle
+ if (cal3_match_found) begin
+
+ // For simulation, load SRL addresses for all DQS with same value
+ if (SIM_ONLY != 0) begin
+ for (i = 0; i < DQS_WIDTH; i = i + 1) begin: loop_sim_rden_dly
+ rden_dly[(i*5)] <= cal3_rden_dly[0];
+ rden_dly[(i*5)+1] <= cal3_rden_dly[1];
+ rden_dly[(i*5)+2] <= cal3_rden_dly[2];
+ rden_dly[(i*5)+3] <= cal3_rden_dly[3];
+ rden_dly[(i*5)+4] <= cal3_rden_dly[4];
+ end
+ end else begin
+ rden_dly[(count_rden*5)] <= cal3_rden_dly[0];
+ rden_dly[(count_rden*5)+1] <= cal3_rden_dly[1];
+ rden_dly[(count_rden*5)+2] <= cal3_rden_dly[2];
+ rden_dly[(count_rden*5)+3] <= cal3_rden_dly[3];
+ rden_dly[(count_rden*5)+4] <= cal3_rden_dly[4];
+ end
+
+ // Use for stage 4 calibration
+ calib_rden_dly[(count_rden*5)] <= cal3_rden_srl_a[0];
+ calib_rden_dly[(count_rden*5)+1] <= cal3_rden_srl_a[1];
+ calib_rden_dly[(count_rden*5)+2] <= cal3_rden_srl_a[2];
+ calib_rden_dly[(count_rden*5)+3] <= cal3_rden_srl_a[3];
+ calib_rden_dly[(count_rden*5)+4] <= cal3_rden_srl_a[4];
+ cal3_state <= CAL3_DONE;
+ end else begin
+ // If we run out of stages to shift, without finding correct
+ // result, the stop and assert error
+ if (cal3_rden_srl_a == 5'b11111) begin
+ calib_err_2[0] <= 1'b1;
+ cal3_state <= CAL3_IDLE;
+ end else begin
+ // otherwise, increase the shift value and try again
+ cal3_rden_srl_a <= cal3_rden_srl_a + 1;
+ cal3_state <= CAL3_RDEN_PIPE_CLR_WAIT;
+ end
+ end
+
+ // give additional time for RDEN_R pipe to clear from effects of
+ // previous pipeline or IDELAY tap change
+ CAL3_RDEN_PIPE_CLR_WAIT:
+ if (calib_rden_pipe_cnt == 5'b00000)
+ cal3_state <= CAL3_DETECT;
+
+ CAL3_DONE: begin
+ if ((count_rden == DQS_WIDTH-1) || (SIM_ONLY != 0)) begin
+ calib_done[2] <= 1'b1;
+ cal3_state <= CAL3_IDLE;
+ end else begin
+ count_rden <= count_rden + 1;
+ cal3_state <= CAL3_INIT;
+ end
+ end
+ endcase
+ end
+ end
+
+ //*****************************************************************
+ // Last part of stage 3 calibration - compensate for differences
+ // in delay between different DQS groups. Assume that in the worst
+ // case, DQS groups can only differ by one clock cycle. Data for
+ // certain DQS groups must be delayed by one clock cycle.
+ // NOTE: May need to increase allowable variation to greater than
+ // one clock cycle in certain customer designs.
+ // Algorithm is:
+ // 1. Record shift delay value for DQS[0]
+ // 2. Compare each DQS[x] delay value to that of DQS[0]:
+ // - If different, than record this fact (RDEN_MUX)
+ // - If greater than DQS[0], set RDEN_INC. Assume greater by
+ // one clock cycle only - this is a key assumption, assume no
+ // more than a one clock cycle variation.
+ // - If less than DQS[0], set RDEN_DEC
+ // 3. After calibration is complete, set control for DQS group
+ // delay (CALIB_RDEN_SEL):
+ // - If RDEN_DEC = 1, then assume that DQS[0] is the lowest
+ // delay (and at least one other DQS group has a higher
+ // delay).
+ // - If RDEN_INC = 1, then assume that DQS[0] is the highest
+ // delay (and that all other DQS groups have the same or
+ // lower delay).
+ // - If both RDEN_INC and RDEN_DEC = 1, then flag error
+ // (variation is too high for this algorithm to handle)
+ //*****************************************************************
+
+ always @(posedge clkdiv) begin
+ if (rstdiv) begin
+ calib_err_2[1] <= 1'b0;
+ calib_rden_sel <= {DQS_WIDTH{1'bx}};
+ rden_dec <= 1'b0;
+ rden_dly_0 <= 5'bxxxxx;
+ rden_inc <= 1'b0;
+ rden_mux <= {DQS_WIDTH{1'b0}};
+ end else begin
+ // if a match if found, then store the value of rden_dly
+ if (!calib_done[2]) begin
+ if ((cal3_state == CAL3_DETECT) && cal3_match_found) begin
+ // store the value for DQS[0] as a reference
+ if (count_rden == 0) begin
+ // for simulation, RDEN calibration only happens for DQS[0]
+ // set RDEN_MUX for all DQS groups to be the same as DQS[0]
+ if (SIM_ONLY != 0)
+ rden_mux <= {DQS_WIDTH{1'b0}};
+ else begin
+ // otherwise, load values for DQS[0]
+ rden_dly_0 <= cal3_rden_srl_a;
+ rden_mux[0] <= 1'b0;
+ end
+ end else if (SIM_ONLY == 0) begin
+ // for all other DQS groups, compare RDEN_DLY delay value with
+ // that of DQS[0]
+ if (rden_dly_0 != cal3_rden_srl_a) begin
+ // record that current DQS group has a different delay
+ // than DQS[0] (the "reference" DQS group)
+ rden_mux[count_rden] <= 1'b1;
+ if (rden_dly_0 > cal3_rden_srl_a)
+ rden_inc <= 1'b1;
+ else if (rden_dly_0 < cal3_rden_srl_a)
+ rden_dec <= 1'b1;
+ // otherwise, if current DQS group has same delay as DQS[0],
+ // then rden_mux[count_rden] remains at 0 (since rden_mux
+ // array contents initialized to 0)
+ end
+ end
+ end
+ end else begin
+ // Otherwise - if we're done w/ stage 2 calibration:
+ // set final value for RDEN data delay
+ // flag error if there's more than one cycle variation from DQS[0]
+ calib_err_2[1] <= (rden_inc && rden_dec);
+ if (rden_inc)
+ // if DQS[0] delay represents max delay
+ calib_rden_sel <= ~rden_mux;
+ else
+ // if DQS[0] delay represents min delay (or all the delays are
+ // the same between DQS groups)
+ calib_rden_sel <= rden_mux;
+ end
+ end
+ end
+
+ // flag error for stage 3 if appropriate
+ always @(posedge clkdiv)
+ calib_err[2] <= calib_err_2[0] | calib_err_2[1];
+
+ //***************************************************************************
+ // Stage 4 calibration: DQS gate
+ //***************************************************************************
+
+ //*****************************************************************
+ // indicates that current received data is the correct pattern. Same as
+ // for READ VALID calibration, except that the expected data sequence is
+ // different since DQS gate is asserted after the 6th word.
+ // Data sequence:
+ // Arrives from memory (at FPGA input) (R, F): 1 0 0 1 1 0 0 1
+ // After gating the sequence looks like: 1 0 0 1 1 0 1 0 (7th word =
+ // 5th word, 8th word = 6th word)
+ // What is the gate timing is off? Need to make sure we can distinquish
+ // between the results of correct vs. incorrect gate timing. We also use
+ // the "read_valid" signal from stage 3 calibration to help us determine
+ // when to check for a valid sequence for stage 4 calibration (i.e. use
+ // CAL4_DATA_VALID in addition to CAL4_DATA_MATCH/CAL4_DATA_MATCH_STGD)
+ // Note that since the gate signal from the CLK0 domain is synchronized
+ // to the falling edge of DQS, that the effect of the gate will only be
+ // seen starting with a rising edge data (although it is possible
+ // the GATE IDDR output could go metastable and cause a unexpected result
+ // on the first rising and falling edges after the gate is enabled).
+ // Also note that the actual DQS glitch can come more than 0.5*tCK after
+ // the last falling edge of DQS and the constraint for this path is can
+ // be > 0.5*tCK; however, this means when calibrating, the output of the
+ // GATE IDDR may miss the setup time requirement of the rising edge flop
+ // and only meet it for the falling edge flop. Therefore the rising
+ // edge data immediately following the assertion of the gate can either
+ // be a 1 or 0 (can rely on either)
+ // As the timing on the gate is varied, we expect to see (sequence of
+ // captured read data shown below):
+ // - 1 0 0 1 1 0 0 1 (gate is really early, starts and ends before
+ // read burst even starts)
+ // - x 0 0 1 1 0 0 1 (gate pulse starts before the burst, and ends
+ // - x y 0 1 1 0 0 1 sometime during the burst; x,y = 0, or 1, but
+ // - x y x 1 1 0 0 1 all bits that show an x are the same value,
+ // - x y x y 1 0 0 1 and y are the same value)
+ // - x y x y x 0 0 1
+ // - x y x y x y 0 1 (gate starts just before start of burst)
+ // - 1 0 x 0 x 0 x 0 (gate starts after 1st falling word. The "x"
+ // represents possiblity that gate may not disable
+ // clock for 2nd rising word in time)
+ // - 1 0 0 1 x 1 x 1 (gate starts after 2nd falling word)
+ // - 1 0 0 1 1 0 x 0 (gate starts after 3rd falling word - GOOD!!)
+ // - 1 0 0 1 1 0 0 1 (gate starts after burst is already done)
+ //*****************************************************************
+
+ assign cal4_data_valid = calib_rden_valid | calib_rden_valid_stgd;
+ assign cal4_data_good = (calib_rden_valid &
+ cal4_data_match) |
+ (calib_rden_valid_stgd &
+ cal4_data_match_stgd);
+
+ always @(posedge clkdiv) begin
+ // if data is aligned out of fabric ISERDES:
+ cal4_data_match <= ((rdd_rise_q2_r == 1) &&
+ (rdd_fall_q2_r == 0) &&
+ (rdd_rise_q1_r == 0) &&
+ (rdd_fall_q1_r == 1) &&
+ (rdd_rise_q2 == 1) &&
+ (rdd_fall_q2 == 0) &&
+ // MIG 2.1: Last rising edge data value not
+ // guaranteed to be certain value at higher
+ // frequencies
+ // (rdd_rise_q1 == 0) &&
+ (rdd_fall_q1 == 0));
+ // if data is staggered out of fabric ISERDES:
+ cal4_data_match_stgd <= ((rdd_rise_q1_r1 == 1) &&
+ (rdd_fall_q1_r1 == 0) &&
+ (rdd_rise_q2_r == 0) &&
+ (rdd_fall_q2_r == 1) &&
+ (rdd_rise_q1_r == 1) &&
+ (rdd_fall_q1_r == 0) &&
+ // MIG 2.1: Last rising edge data value not
+ // guaranteed to be certain value at higher
+ // frequencies
+ // (rdd_rise_q2 == 0) &&
+ (rdd_fall_q2 == 0));
+ end
+
+ //*****************************************************************
+ // DQS gate enable generation:
+ // This signal gets synchronized to DQS domain, and drives IDDR
+ // register that in turn asserts/deasserts CE to all 4 or 8 DQ
+ // IDDR's in that DQS group.
+ // 1. During normal (post-cal) operation, this is only for 2 clock
+ // cycles following the end of a burst. Check for falling edge
+ // of RDEN. But must also make sure NOT assert for a read-idle-
+ // read (two non-consecutive reads, separated by exactly one
+ // idle cycle) - in this case, don't assert the gate because:
+ // (1) we don't have enough time to deassert the gate before the
+ // first rising edge of DQS for second burst (b/c of fact
+ // that DQS gate is generated in the fabric only off rising
+ // edge of CLK0 - if we somehow had an ODDR in fabric, we
+ // could pull this off, (2) assumption is that the DQS glitch
+ // will not rise enough to cause a glitch because the
+ // post-amble of the first burst is followed immediately by
+ // the pre-amble of the next burst
+ // 2. During stage 4 calibration, assert for 3 clock cycles
+ // (assert gate enable one clock cycle early), since we gate out
+ // the last two words (in addition to the crap on the DQ bus after
+ // the DQS read postamble).
+ // NOTE: PHY_INIT_RDEN and CTRL_RDEN have slightly different timing w/r
+ // to when they are asserted w/r to the start of the read burst
+ // (PHY_INIT_RDEN is one cycle earlier than CTRL_RDEN).
+ //*****************************************************************
+
+ // register for timing purposes for fast clock path - currently only
+ // calib_done_r[2] used
+ always @(posedge clk)
+ calib_done_r <= calib_done;
+
+ always @(*) begin
+ calib_ctrl_rden = ctrl_rden;
+ calib_init_rden = calib_done_r[2] & phy_init_rden;
+ end
+
+ assign calib_ctrl_rden_negedge = ~calib_ctrl_rden & calib_ctrl_rden_r;
+ // check for read-idle-read before asserting DQS pulse at end of read
+ assign calib_ctrl_gate_pulse = calib_ctrl_rden_negedge_r &
+ ~calib_ctrl_rden;
+ always @(posedge clk) begin
+ calib_ctrl_rden_r <= calib_ctrl_rden;
+ calib_ctrl_rden_negedge_r <= calib_ctrl_rden_negedge;
+ calib_ctrl_gate_pulse_r <= calib_ctrl_gate_pulse;
+ end
+
+ assign calib_init_gate_pulse = ~calib_init_rden & calib_init_rden_r;
+ always @(posedge clk) begin
+ calib_init_rden_r <= calib_init_rden;
+ calib_init_gate_pulse_r <= calib_init_gate_pulse;
+ calib_init_gate_pulse_r1 <= calib_init_gate_pulse_r;
+ end
+
+ // Gate is asserted: (1) during cal, for 3 cycles, starting 1 cycle
+ // after falling edge of CTRL_RDEN, (2) during normal ops, for 2
+ // cycles, starting 2 cycles after falling edge of CTRL_RDEN
+ assign gate_srl_in = ~((calib_ctrl_gate_pulse |
+ calib_ctrl_gate_pulse_r) |
+ (calib_init_gate_pulse |
+ calib_init_gate_pulse_r |
+ calib_init_gate_pulse_r1));
+
+ //*****************************************************************
+ // generate DQS enable signal for each DQS group
+ // There are differences between DQS gate signal for calibration vs. during
+ // normal operation:
+ // * calibration gates the second to last clock cycle of the burst,
+ // rather than after the last word (e.g. for a 8-word, 4-cycle burst,
+ // cycle 4 is gated for calibration; during normal operation, cycle
+ // 5 (i.e. cycle after the last word) is gated)
+ // enable for DQS is deasserted for two clock cycles, except when
+ // we have the preamble for the next read immediately following
+ // the postamble of the current read - assume DQS does not glitch
+ // during this time, that it stays low. Also if we did have to gate
+ // the DQS for this case, then we don't have enough time to deassert
+ // the gate in time for the first rising edge of DQS for the second
+ // read
+ //*****************************************************************
+
+ // Flops for targetting of multi-cycle path in UCF
+ genvar gate_ff_i;
+ generate
+ for (gate_ff_i = 0; gate_ff_i < 5*DQS_WIDTH;
+ gate_ff_i = gate_ff_i+1) begin: gen_gate_dly
+ FDRSE u_ff_gate_dly
+ (
+ .Q (gate_dly_r[gate_ff_i]),
+ .C (clkdiv),
+ .CE (1'b1),
+ .D (gate_dly[gate_ff_i]),
+ .R (1'b0),
+ .S (1'b0)
+ ) /* synthesis syn_preserve = 1 */
+ /* synthesis syn_replicate = 0 */;
+ end
+ endgenerate
+
+ genvar gate_i;
+ generate
+ for (gate_i = 0; gate_i < DQS_WIDTH; gate_i = gate_i + 1) begin: gen_gate
+ SRLC32E u_gate_srl
+ (
+ .Q (gate_srl_out[gate_i]),
+ .Q31 (),
+ .A ({gate_dly_r[(gate_i*5)+4],
+ gate_dly_r[(gate_i*5)+3],
+ gate_dly_r[(gate_i*5)+2],
+ gate_dly_r[(gate_i*5)+1],
+ gate_dly_r[(gate_i*5)]}),
+ .CE (1'b1),
+ .CLK (clk),
+ .D (gate_srl_in)
+ );
+
+ // For GATE_BASE_DELAY > 0, have one extra cycle to register outputs
+ // from controller before generating DQS gate pulse. In PAR, the
+ // location of the controller logic can be far from the DQS gate
+ // logic (DQS gate logic located near the DQS I/O's), contributing
+ // to large net delays. Registering the controller outputs for
+ // CL >= 4 (above 200MHz) adds a stage of pipelining to reduce net
+ // delays
+ if (GATE_BASE_DELAY > 0) begin: gen_gate_base_dly_gt3
+ // add flop between SRL32 and EN_DQS flop (which is located near the
+ // DDR2 IOB's)
+ FDRSE u_gate_srl_ff
+ (
+ .Q (gate_srl_out_r[gate_i]),
+ .C (clk),
+ .CE (1'b1),
+ .D (gate_srl_out[gate_i]),
+ .R (1'b0),
+ .S (1'b0)
+ ) /* synthesis syn_preserve = 1 */;
+ end else begin: gen_gate_base_dly_le3
+ assign gate_srl_out_r[gate_i] = gate_srl_out[gate_i];
+ end
+
+ FDRSE u_en_dqs_ff
+ (
+ .Q (en_dqs[gate_i]),
+ .C (clk),
+ .CE (1'b1),
+ .D (gate_srl_out_r[gate_i]),
+ .R (1'b0),
+ .S (1'b0)
+ ) /* synthesis syn_preserve = 1 */
+ /* synthesis syn_replicate = 0 */;
+ end
+ endgenerate
+
+ //*****************************************************************
+ // Find valid window: keep track of how long we've been in the same data
+ // window. If it's been long enough, then declare that we've found a stable
+ // valid window - in particular, that we're past any region of instability
+ // associated with the edge of the window. Use only when finding left edge
+ //*****************************************************************
+
+ always @(posedge clkdiv)
+ // reset before we start to look for window
+ if (cal4_state == CAL4_INIT) begin
+ cal4_window_cnt <= 4'b0000;
+ cal4_stable_window <= 1'b0;
+ end else if ((cal4_state == CAL4_FIND_EDGE) && cal4_seek_left) begin
+ // if we're looking for left edge, and incrementing IDELAY, count
+ // consecutive taps over which we're in the window
+ if (cal4_data_valid) begin
+ if (cal4_data_good)
+ cal4_window_cnt <= cal4_window_cnt + 1;
+ else
+ cal4_window_cnt <= 4'b0000;
+ end
+
+ if (cal4_window_cnt == MIN_WIN_SIZE-1)
+ cal4_stable_window <= 1'b1;
+ end
+
+ //*****************************************************************
+ // keep track of edge tap counts found, and whether we've
+ // incremented to the maximum number of taps allowed
+ //*****************************************************************
+
+ always @(posedge clkdiv)
+ if ((cal4_state == CAL4_INIT) || cal4_dlyrst_gate) begin
+ cal4_idel_max_tap <= 1'b0;
+ cal4_idel_bit_tap <= 1'b0;
+ cal4_idel_tap_cnt <= 6'b000000;
+ end else if (cal4_dlyce_gate) begin
+ if (cal4_dlyinc_gate) begin
+ cal4_idel_tap_cnt <= cal4_idel_tap_cnt + 1;
+ cal4_idel_bit_tap <= (cal4_idel_tap_cnt == CAL4_IDEL_BIT_VAL-2);
+ cal4_idel_max_tap <= (cal4_idel_tap_cnt == 6'b111110);
+ end else begin
+ cal4_idel_tap_cnt <= cal4_idel_tap_cnt - 1;
+ cal4_idel_bit_tap <= 1'b0;
+ cal4_idel_max_tap <= 1'b0;
+ end
+ end
+
+ always @(posedge clkdiv)
+ if ((cal4_state != CAL4_RDEN_PIPE_CLR_WAIT) &&
+ (cal3_state != CAL3_RDEN_PIPE_CLR_WAIT))
+ calib_rden_pipe_cnt <= CALIB_RDEN_PIPE_LEN-1;
+ else
+ calib_rden_pipe_cnt <= calib_rden_pipe_cnt - 1;
+
+ //*****************************************************************
+ // Stage 4 cal state machine
+ //*****************************************************************
+
+ always @(posedge clkdiv)
+ if (rstdiv) begin
+ calib_done[3] <= 1'b0;
+ calib_done_tmp[3] <= 1'b0;
+ calib_err[3] <= 1'b0;
+ count_gate <= 'b0;
+ gate_dly <= 'b0;
+ next_count_gate <= 'b0;
+ cal4_idel_adj_cnt <= 6'bxxxxxx;
+ cal4_dlyce_gate <= 1'b0;
+ cal4_dlyinc_gate <= 1'b0;
+ cal4_dlyrst_gate <= 1'b0; // reset handled elsewhere in code
+ cal4_gate_srl_a <= 5'bxxxxx;
+ cal4_rden_srl_a <= 5'bxxxxx;
+ cal4_ref_req <= 1'b0;
+ cal4_seek_left <= 1'bx;
+ cal4_state <= CAL4_IDLE;
+ end else begin
+ cal4_ref_req <= 1'b0;
+ cal4_dlyce_gate <= 1'b0;
+ cal4_dlyinc_gate <= 1'b0;
+ cal4_dlyrst_gate <= 1'b0;
+
+ case (cal4_state)
+ CAL4_IDLE: begin
+ count_gate <= 'b0;
+ next_count_gate <= 'b0;
+ if (calib_start[3]) begin
+ gate_dly <= 'b0;
+ calib_done[3] <= 1'b0;
+ cal4_state <= CAL4_INIT;
+ end
+ end
+
+ CAL4_INIT: begin
+ // load: (1) initial value of gate delay SRL, (2) appropriate
+ // value of RDEN SRL (so that we get correct "data valid" timing)
+ cal4_gate_srl_a <= GATE_BASE_INIT;
+ cal4_rden_srl_a <= {calib_rden_dly[(count_gate*5)+4],
+ calib_rden_dly[(count_gate*5)+3],
+ calib_rden_dly[(count_gate*5)+2],
+ calib_rden_dly[(count_gate*5)+1],
+ calib_rden_dly[(count_gate*5)]};
+ // let SRL pipe clear after loading initial shift value
+ cal4_state <= CAL4_RDEN_PIPE_CLR_WAIT;
+ end
+
+ // sort of an initial state - start checking to see whether we're
+ // already in the window or not
+ CAL4_FIND_WINDOW:
+ // decide right away if we start in the proper window - this
+ // determines if we are then looking for the left (trailing) or
+ // right (leading) edge of the data valid window
+ if (cal4_data_valid) begin
+ // if we find a match - then we're already in window, now look
+ // for left edge. Otherwise, look for right edge of window
+ cal4_seek_left <= cal4_data_good;
+ cal4_state <= CAL4_FIND_EDGE;
+ end
+
+ CAL4_FIND_EDGE:
+ // don't do anything until the exact clock cycle when to check that
+ // readback data is valid or not
+ if (cal4_data_valid) begin
+ // we're currently in the window, look for left edge of window
+ if (cal4_seek_left) begin
+ // make sure we've passed the right edge before trying to detect
+ // the left edge (i.e. avoid any edge "instability") - else, we
+ // may detect an "false" edge too soon. By design, if we start in
+ // the data valid window, always expect at least
+ // MIN(BIT_TIME_TAPS,32) (-/+ jitter, see below) taps of valid
+ // window before we hit the left edge (this is because when stage
+ // 4 calibration first begins (i.e., gate_dly = 00, and IDELAY =
+ // 00), we're guaranteed to NOT be in the window, and we always
+ // start searching for MIN(BIT_TIME_TAPS,32) for the right edge
+ // of window. If we don't find it, increment gate_dly, and if we
+ // now start in the window, we have at least approximately
+ // CLK_PERIOD-MIN(BIT_TIME_TAPS,32) = MIN(BIT_TIME_TAPS,32) taps.
+ // It's approximately because jitter, noise, etc. can bring this
+ // value down slightly. Because of this (although VERY UNLIKELY),
+ // we have to protect against not decrementing IDELAY below 0
+ // during adjustment phase).
+ if (cal4_stable_window && !cal4_data_good) begin
+ // found left edge of window, dec by MIN(BIT_TIME_TAPS,32)
+ cal4_idel_adj_cnt <= CAL4_IDEL_BIT_VAL;
+ cal4_idel_adj_inc <= 1'b0;
+ cal4_state <= CAL4_ADJ_IDEL;
+ end else begin
+ // Otherwise, keep looking for left edge:
+ if (cal4_idel_max_tap) begin
+ // ran out of taps looking for left edge (max=63) - happens
+ // for low frequency case, decrement by 32
+ cal4_idel_adj_cnt <= 6'b100000;
+ cal4_idel_adj_inc <= 1'b0;
+ cal4_state <= CAL4_ADJ_IDEL;
+ end else begin
+ cal4_dlyce_gate <= 1'b1;
+ cal4_dlyinc_gate <= 1'b1;
+ cal4_state <= CAL4_IDEL_WAIT;
+ end
+ end
+ end else begin
+ // looking for right edge of window:
+ // look for the first match - this means we've found the right
+ // (leading) edge of the data valid window, increment by
+ // MIN(BIT_TIME_TAPS,32)
+ if (cal4_data_good) begin
+ cal4_idel_adj_cnt <= CAL4_IDEL_BIT_VAL;
+ cal4_idel_adj_inc <= 1'b1;
+ cal4_state <= CAL4_ADJ_IDEL;
+ end else begin
+ // Otherwise, keep looking:
+ // only look for MIN(BIT_TIME_TAPS,32) taps for right edge,
+ // if we haven't found it, then inc gate delay, try again
+ if (cal4_idel_bit_tap) begin
+ // if we're already maxed out on gate delay, then error out
+ // (simulation only - calib_err isn't currently connected)
+ if (cal4_gate_srl_a == 5'b11111) begin
+ calib_err[3] <= 1'b1;
+ cal4_state <= CAL4_IDLE;
+ end else begin
+ // otherwise, increment gate delay count, and start
+ // over again
+ cal4_gate_srl_a <= cal4_gate_srl_a + 1;
+ cal4_dlyrst_gate <= 1'b1;
+ cal4_state <= CAL4_RDEN_PIPE_CLR_WAIT;
+ end
+ end else begin
+ // keep looking for right edge
+ cal4_dlyce_gate <= 1'b1;
+ cal4_dlyinc_gate <= 1'b1;
+ cal4_state <= CAL4_IDEL_WAIT;
+ end
+ end
+ end
+ end
+
+ // wait for GATE IDELAY to settle, after reset or increment
+ CAL4_IDEL_WAIT: begin
+ // For simulation, load SRL addresses for all DQS with same value
+ if (SIM_ONLY != 0) begin
+ for (i = 0; i < DQS_WIDTH; i = i + 1) begin: loop_sim_gate_dly
+ gate_dly[(i*5)+4] <= cal4_gate_srl_a[4];
+ gate_dly[(i*5)+3] <= cal4_gate_srl_a[3];
+ gate_dly[(i*5)+2] <= cal4_gate_srl_a[2];
+ gate_dly[(i*5)+1] <= cal4_gate_srl_a[1];
+ gate_dly[(i*5)] <= cal4_gate_srl_a[0];
+ end
+ end else begin
+ gate_dly[(count_gate*5)+4] <= cal4_gate_srl_a[4];
+ gate_dly[(count_gate*5)+3] <= cal4_gate_srl_a[3];
+ gate_dly[(count_gate*5)+2] <= cal4_gate_srl_a[2];
+ gate_dly[(count_gate*5)+1] <= cal4_gate_srl_a[1];
+ gate_dly[(count_gate*5)] <= cal4_gate_srl_a[0];
+ end
+ // check to see if we've found edge of window
+ if (!idel_set_wait)
+ cal4_state <= CAL4_FIND_EDGE;
+ end
+
+ // give additional time for RDEN_R pipe to clear from effects of
+ // previous pipeline (and IDELAY reset)
+ CAL4_RDEN_PIPE_CLR_WAIT: begin
+ // MIG 2.2: Bug fix - make sure to update GATE_DLY count, since
+ // possible for FIND_EDGE->RDEN_PIPE_CLR_WAIT->FIND_WINDOW
+ // transition (i.e. need to make sure the gate count updated in
+ // FIND_EDGE gets reflected in GATE_DLY by the time we reach
+ // state FIND_WINDOW) - previously GATE_DLY only being updated
+ // during state CAL4_IDEL_WAIT
+ if (SIM_ONLY != 0) begin
+ for (i = 0; i < DQS_WIDTH; i = i + 1) begin: loop_sim_gate_dly_pipe
+ gate_dly[(i*5)+4] <= cal4_gate_srl_a[4];
+ gate_dly[(i*5)+3] <= cal4_gate_srl_a[3];
+ gate_dly[(i*5)+2] <= cal4_gate_srl_a[2];
+ gate_dly[(i*5)+1] <= cal4_gate_srl_a[1];
+ gate_dly[(i*5)] <= cal4_gate_srl_a[0];
+ end
+ end else begin
+ gate_dly[(count_gate*5)+4] <= cal4_gate_srl_a[4];
+ gate_dly[(count_gate*5)+3] <= cal4_gate_srl_a[3];
+ gate_dly[(count_gate*5)+2] <= cal4_gate_srl_a[2];
+ gate_dly[(count_gate*5)+1] <= cal4_gate_srl_a[1];
+ gate_dly[(count_gate*5)] <= cal4_gate_srl_a[0];
+ end
+ // look for new window
+ if (calib_rden_pipe_cnt == 5'b00000)
+ cal4_state <= CAL4_FIND_WINDOW;
+ end
+
+ // increment/decrement DQS/DQ IDELAY for final adjustment
+ CAL4_ADJ_IDEL:
+ // add underflow protection for corner case when left edge found
+ // using fewer than MIN(BIT_TIME_TAPS,32) taps
+ if ((cal4_idel_adj_cnt == 6'b000000) ||
+ (cal4_dlyce_gate && !cal4_dlyinc_gate &&
+ (cal4_idel_tap_cnt == 6'b000001))) begin
+ cal4_state <= CAL4_DONE;
+ // stop when all gates calibrated, or gate[0] cal'ed (for sim)
+ if ((count_gate == DQS_WIDTH-1) || (SIM_ONLY != 0))
+ calib_done_tmp[3] <= 1'b1;
+ else
+ // need for VHDL simulation to prevent out-of-index error
+ next_count_gate <= count_gate + 1;
+ end else begin
+ cal4_idel_adj_cnt <= cal4_idel_adj_cnt - 1;
+ cal4_dlyce_gate <= 1'b1;
+ // whether inc or dec depends on whether left or right edge found
+ cal4_dlyinc_gate <= cal4_idel_adj_inc;
+ end
+
+ // wait for IDELAY output to settle after decrement. Check current
+ // COUNT_GATE value and decide if we're done
+ CAL4_DONE:
+ if (!idel_set_wait) begin
+ count_gate <= next_count_gate;
+ if (calib_done_tmp[3]) begin
+ calib_done[3] <= 1'b1;
+ cal4_state <= CAL4_IDLE;
+ end else begin
+ // request auto-refresh after every DQS group calibrated to
+ // avoid tRAS violation
+ cal4_ref_req <= 1'b1;
+ if (calib_ref_done)
+ cal4_state <= CAL4_INIT;
+ end
+ end
+ endcase
+ end
+
+endmodule
--- /dev/null
+//*****************************************************************************
+// DISCLAIMER OF LIABILITY
+//
+// This text/file contains proprietary, confidential
+// information of Xilinx, Inc., is distributed under license
+// from Xilinx, Inc., and may be used, copied and/or
+// disclosed only pursuant to the terms of a valid license
+// agreement with Xilinx, Inc. Xilinx hereby grants you a
+// license to use this text/file solely for design, simulation,
+// implementation and creation of design files limited
+// to Xilinx devices or technologies. Use with non-Xilinx
+// devices or technologies is expressly prohibited and
+// immediately terminates your license unless covered by
+// a separate agreement.
+//
+// Xilinx is providing this design, code, or information
+// "as-is" solely for use in developing programs and
+// solutions for Xilinx devices, with no obligation on the
+// part of Xilinx to provide support. By providing this design,
+// code, or information as one possible implementation of
+// this feature, application or standard, Xilinx is making no
+// representation that this implementation is free from any
+// claims of infringement. You are responsible for
+// obtaining any rights you may require for your implementation.
+// Xilinx expressly disclaims any warranty whatsoever with
+// respect to the adequacy of the implementation, including
+// but not limited to any warranties or representations that this
+// implementation is free from claims of infringement, implied
+// warranties of merchantability or fitness for a particular
+// purpose.
+//
+// Xilinx products are not intended for use in life support
+// appliances, devices, or systems. Use in such applications is
+// expressly prohibited.
+//
+// Any modifications that are made to the Source Code are
+// done at the user\92s sole risk and will be unsupported.
+//
+// Copyright (c) 2006-2007 Xilinx, Inc. All rights reserved.
+//
+// This copyright and support notice must be retained as part
+// of this text at all times.
+//*****************************************************************************
+// ____ ____
+// / /\/ /
+// /___/ \ / Vendor: Xilinx
+// \ \ \/ Version: 2.3
+// \ \ Application: MIG
+// / / Filename: ddr2_phy_ctl_io.v
+// /___/ /\ Date Last Modified: $Date: 2008/07/29 15:24:03 $
+// \ \ / \ Date Created: Thu Aug 24 2006
+// \___\/\___\
+//
+//Device: Virtex-5
+//Design Name: DDR2
+//Purpose:
+// This module puts the memory control signals like address, bank address,
+// row address strobe, column address strobe, write enable and clock enable
+// in the IOBs.
+//Reference:
+//Revision History:
+//*****************************************************************************
+
+`timescale 1ns/1ps
+
+module ddr2_phy_ctl_io #
+ (
+ // Following parameters are for 72-bit RDIMM design (for ML561 Reference
+ // board design). Actual values may be different. Actual parameters values
+ // are passed from design top module ddr2_sdram module. Please refer to
+ // the ddr2_sdram module for actual values.
+ parameter BANK_WIDTH = 2,
+ parameter CKE_WIDTH = 1,
+ parameter COL_WIDTH = 10,
+ parameter CS_NUM = 1,
+ parameter TWO_T_TIME_EN = 0,
+ parameter CS_WIDTH = 1,
+ parameter ODT_WIDTH = 1,
+ parameter ROW_WIDTH = 14,
+ parameter DDR_TYPE = 1
+ )
+ (
+ input clk0,
+ input clk90,
+ input rst0,
+ input rst90,
+ input [ROW_WIDTH-1:0] ctrl_addr,
+ input [BANK_WIDTH-1:0] ctrl_ba,
+ input ctrl_ras_n,
+ input ctrl_cas_n,
+ input ctrl_we_n,
+ input [CS_NUM-1:0] ctrl_cs_n,
+ input [ROW_WIDTH-1:0] phy_init_addr,
+ input [BANK_WIDTH-1:0] phy_init_ba,
+ input phy_init_ras_n,
+ input phy_init_cas_n,
+ input phy_init_we_n,
+ input [CS_NUM-1:0] phy_init_cs_n,
+ input [CKE_WIDTH-1:0] phy_init_cke,
+ input phy_init_data_sel,
+ input [CS_NUM-1:0] odt,
+ output [ROW_WIDTH-1:0] ddr_addr,
+ output [BANK_WIDTH-1:0] ddr_ba,
+ output ddr_ras_n,
+ output ddr_cas_n,
+ output ddr_we_n,
+ output [CKE_WIDTH-1:0] ddr_cke,
+ output [CS_WIDTH-1:0] ddr_cs_n,
+ output [ODT_WIDTH-1:0] ddr_odt
+ );
+
+ reg [ROW_WIDTH-1:0] addr_mux;
+ reg [BANK_WIDTH-1:0] ba_mux;
+ reg cas_n_mux;
+ reg [CS_NUM-1:0] cs_n_mux;
+ reg ras_n_mux;
+ reg we_n_mux;
+
+
+
+ //***************************************************************************
+
+
+
+
+ // MUX to choose from either PHY or controller for SDRAM control
+
+ generate // in 2t timing mode the extra register stage cannot be used.
+ if(TWO_T_TIME_EN) begin // the control signals are asserted for two cycles
+ always @(*)begin
+ if (phy_init_data_sel) begin
+ addr_mux = ctrl_addr;
+ ba_mux = ctrl_ba;
+ cas_n_mux = ctrl_cas_n;
+ cs_n_mux = ctrl_cs_n;
+ ras_n_mux = ctrl_ras_n;
+ we_n_mux = ctrl_we_n;
+ end else begin
+ addr_mux = phy_init_addr;
+ ba_mux = phy_init_ba;
+ cas_n_mux = phy_init_cas_n;
+ cs_n_mux = phy_init_cs_n;
+ ras_n_mux = phy_init_ras_n;
+ we_n_mux = phy_init_we_n;
+ end
+ end
+ end else begin
+ always @(posedge clk0)begin // register the signals in non 2t mode
+ if (phy_init_data_sel) begin
+ addr_mux <= ctrl_addr;
+ ba_mux <= ctrl_ba;
+ cas_n_mux <= ctrl_cas_n;
+ cs_n_mux <= ctrl_cs_n;
+ ras_n_mux <= ctrl_ras_n;
+ we_n_mux <= ctrl_we_n;
+ end else begin
+ addr_mux <= phy_init_addr;
+ ba_mux <= phy_init_ba;
+ cas_n_mux <= phy_init_cas_n;
+ cs_n_mux <= phy_init_cs_n;
+ ras_n_mux <= phy_init_ras_n;
+ we_n_mux <= phy_init_we_n;
+ end
+ end
+ end
+ endgenerate
+
+ //***************************************************************************
+ // Output flop instantiation
+ // NOTE: Make sure all control/address flops are placed in IOBs
+ //***************************************************************************
+
+ // RAS: = 1 at reset
+ (* IOB = "TRUE" *) FDCPE u_ff_ras_n
+ (
+ .Q (ddr_ras_n),
+ .C (clk0),
+ .CE (1'b1),
+ .CLR (1'b0),
+ .D (ras_n_mux),
+ .PRE (rst0)
+ ) /* synthesis syn_useioff = 1 */;
+
+ // CAS: = 1 at reset
+ (* IOB = "TRUE" *) FDCPE u_ff_cas_n
+ (
+ .Q (ddr_cas_n),
+ .C (clk0),
+ .CE (1'b1),
+ .CLR (1'b0),
+ .D (cas_n_mux),
+ .PRE (rst0)
+ ) /* synthesis syn_useioff = 1 */;
+
+ // WE: = 1 at reset
+ (* IOB = "TRUE" *) FDCPE u_ff_we_n
+ (
+ .Q (ddr_we_n),
+ .C (clk0),
+ .CE (1'b1),
+ .CLR (1'b0),
+ .D (we_n_mux),
+ .PRE (rst0)
+ ) /* synthesis syn_useioff = 1 */;
+
+ // CKE: = 0 at reset
+ genvar cke_i;
+ generate
+ for (cke_i = 0; cke_i < CKE_WIDTH; cke_i = cke_i + 1) begin: gen_cke
+ (* IOB = "TRUE" *) FDCPE u_ff_cke
+ (
+ .Q (ddr_cke[cke_i]),
+ .C (clk0),
+ .CE (1'b1),
+ .CLR (rst0),
+ .D (phy_init_cke[cke_i]),
+ .PRE (1'b0)
+ ) /* synthesis syn_useioff = 1 */;
+ end
+ endgenerate
+
+ // chip select: = 1 at reset
+ // For unbuffered dimms the loading will be high. The chip select
+ // can be asserted early if the loading is very high. The
+ // code as is uses clock 0. If needed clock 270 can be used to
+ // toggle chip select 1/4 clock cycle early. The code has
+ // the clock 90 input for the early assertion of chip select.
+
+ genvar cs_i;
+ generate
+ for(cs_i = 0; cs_i < CS_WIDTH; cs_i = cs_i + 1) begin: gen_cs_n
+ if(TWO_T_TIME_EN) begin
+ (* IOB = "TRUE" *) FDCPE u_ff_cs_n
+ (
+ .Q (ddr_cs_n[cs_i]),
+ .C (clk0),
+ .CE (1'b1),
+ .CLR (1'b0),
+ .D (cs_n_mux[(cs_i*CS_NUM)/CS_WIDTH]),
+ .PRE (rst0)
+ ) /* synthesis syn_useioff = 1 */;
+ end else begin // if (TWO_T_TIME_EN)
+ (* IOB = "TRUE" *) FDCPE u_ff_cs_n
+ (
+ .Q (ddr_cs_n[cs_i]),
+ .C (clk0),
+ .CE (1'b1),
+ .CLR (1'b0),
+ .D (cs_n_mux[(cs_i*CS_NUM)/CS_WIDTH]),
+ .PRE (rst0)
+ ) /* synthesis syn_useioff = 1 */;
+ end // else: !if(TWO_T_TIME_EN)
+ end
+ endgenerate
+
+ // address: = X at reset
+ genvar addr_i;
+ generate
+ for (addr_i = 0; addr_i < ROW_WIDTH; addr_i = addr_i + 1) begin: gen_addr
+ (* IOB = "TRUE" *) FDCPE u_ff_addr
+ (
+ .Q (ddr_addr[addr_i]),
+ .C (clk0),
+ .CE (1'b1),
+ .CLR (1'b0),
+ .D (addr_mux[addr_i]),
+ .PRE (1'b0)
+ ) /* synthesis syn_useioff = 1 */;
+ end
+ endgenerate
+
+ // bank address = X at reset
+ genvar ba_i;
+ generate
+ for (ba_i = 0; ba_i < BANK_WIDTH; ba_i = ba_i + 1) begin: gen_ba
+ (* IOB = "TRUE" *) FDCPE u_ff_ba
+ (
+ .Q (ddr_ba[ba_i]),
+ .C (clk0),
+ .CE (1'b1),
+ .CLR (1'b0),
+ .D (ba_mux[ba_i]),
+ .PRE (1'b0)
+ ) /* synthesis syn_useioff = 1 */;
+ end
+ endgenerate
+
+ // ODT control = 0 at reset
+ genvar odt_i;
+ generate
+ if (DDR_TYPE > 0) begin: gen_odt_ddr2
+ for (odt_i = 0; odt_i < ODT_WIDTH; odt_i = odt_i + 1) begin: gen_odt
+ (* IOB = "TRUE" *) FDCPE u_ff_odt
+ (
+ .Q (ddr_odt[odt_i]),
+ .C (clk0),
+ .CE (1'b1),
+ .CLR (rst0),
+ .D (odt[(odt_i*CS_NUM)/ODT_WIDTH]),
+ .PRE (1'b0)
+ ) /* synthesis syn_useioff = 1 */;
+ end
+ end
+ endgenerate
+
+endmodule
--- /dev/null
+//*****************************************************************************
+// DISCLAIMER OF LIABILITY
+//
+// This text/file contains proprietary, confidential
+// information of Xilinx, Inc., is distributed under license
+// from Xilinx, Inc., and may be used, copied and/or
+// disclosed only pursuant to the terms of a valid license
+// agreement with Xilinx, Inc. Xilinx hereby grants you a
+// license to use this text/file solely for design, simulation,
+// implementation and creation of design files limited
+// to Xilinx devices or technologies. Use with non-Xilinx
+// devices or technologies is expressly prohibited and
+// immediately terminates your license unless covered by
+// a separate agreement.
+//
+// Xilinx is providing this design, code, or information
+// "as-is" solely for use in developing programs and
+// solutions for Xilinx devices, with no obligation on the
+// part of Xilinx to provide support. By providing this design,
+// code, or information as one possible implementation of
+// this feature, application or standard, Xilinx is making no
+// representation that this implementation is free from any
+// claims of infringement. You are responsible for
+// obtaining any rights you may require for your implementation.
+// Xilinx expressly disclaims any warranty whatsoever with
+// respect to the adequacy of the implementation, including
+// but not limited to any warranties or representations that this
+// implementation is free from claims of infringement, implied
+// warranties of merchantability or fitness for a particular
+// purpose.
+//
+// Xilinx products are not intended for use in life support
+// appliances, devices, or systems. Use in such applications is
+// expressly prohibited.
+//
+// Any modifications that are made to the Source Code are
+// done at the user\92s sole risk and will be unsupported.
+//
+// Copyright (c) 2006-2007 Xilinx, Inc. All rights reserved.
+//
+// This copyright and support notice must be retained as part
+// of this text at all times.
+//*****************************************************************************
+// ____ ____
+// / /\/ /
+// /___/ \ / Vendor: Xilinx
+// \ \ \/ Version: 2.3
+// \ \ Application: MIG
+// / / Filename: ddr2_phy_dm_iob.v
+// /___/ /\ Date Last Modified: $Date: 2008/05/21 14:53:09 $
+// \ \ / \ Date Created: Wed Aug 16 2006
+// \___\/\___\
+//
+//Device: Virtex-5
+//Design Name: DDR2
+//Purpose:
+// This module places the data mask signals into the IOBs.
+//Reference:
+//Revision History:
+//*****************************************************************************
+
+`timescale 1ns/1ps
+
+module ddr2_phy_dm_iob
+ (
+ input clk90,
+ input dm_ce,
+ input mask_data_rise,
+ input mask_data_fall,
+ output ddr_dm
+ );
+
+ wire dm_out;
+ wire dm_ce_r;
+
+ FDRSE_1 u_dm_ce
+ (
+ .Q (dm_ce_r),
+ .C (clk90),
+ .CE (1'b1),
+ .D (dm_ce),
+ .R (1'b0),
+ .S (1'b0)
+ );
+
+ ODDR #
+ (
+ .SRTYPE("SYNC"),
+ .DDR_CLK_EDGE("SAME_EDGE")
+ )
+ u_oddr_dm
+ (
+ .Q (dm_out),
+ .C (clk90),
+ .CE (dm_ce_r),
+ .D1 (mask_data_rise),
+ .D2 (mask_data_fall),
+ .R (1'b0),
+ .S (1'b0)
+ );
+
+ OBUF u_obuf_dm
+ (
+ .I (dm_out),
+ .O (ddr_dm)
+ );
+
+endmodule
--- /dev/null
+//*****************************************************************************
+// DISCLAIMER OF LIABILITY
+//
+// This text/file contains proprietary, confidential
+// information of Xilinx, Inc., is distributed under license
+// from Xilinx, Inc., and may be used, copied and/or
+// disclosed only pursuant to the terms of a valid license
+// agreement with Xilinx, Inc. Xilinx hereby grants you a
+// license to use this text/file solely for design, simulation,
+// implementation and creation of design files limited
+// to Xilinx devices or technologies. Use with non-Xilinx
+// devices or technologies is expressly prohibited and
+// immediately terminates your license unless covered by
+// a separate agreement.
+//
+// Xilinx is providing this design, code, or information
+// "as-is" solely for use in developing programs and
+// solutions for Xilinx devices, with no obligation on the
+// part of Xilinx to provide support. By providing this design,
+// code, or information as one possible implementation of
+// this feature, application or standard, Xilinx is making no
+// representation that this implementation is free from any
+// claims of infringement. You are responsible for
+// obtaining any rights you may require for your implementation.
+// Xilinx expressly disclaims any warranty whatsoever with
+// respect to the adequacy of the implementation, including
+// but not limited to any warranties or representations that this
+// implementation is free from claims of infringement, implied
+// warranties of merchantability or fitness for a particular
+// purpose.
+//
+// Xilinx products are not intended for use in life support
+// appliances, devices, or systems. Use in such applications is
+// expressly prohibited.
+//
+// Any modifications that are made to the Source Code are
+// done at the user\92s sole risk and will be unsupported.
+//
+// Copyright (c) 2006-2007 Xilinx, Inc. All rights reserved.
+//
+// This copyright and support notice must be retained as part
+// of this text at all times.
+//*****************************************************************************
+// ____ ____
+// / /\/ /
+// /___/ \ / Vendor: Xilinx
+// \ \ \/ Version: 2.3
+// \ \ Application: MIG
+// / / Filename: ddr2_phy_dq_iob.v
+// /___/ /\ Date Last Modified: $Date: 2008/07/17 07:52:27 $
+// \ \ / \ Date Created: Wed Aug 16 2006
+// \___\/\___\
+//
+//Device: Virtex-5
+//Design Name: DDR2
+//Purpose:
+// This module places the data in the IOBs.
+//Reference:
+//Revision History:
+//*****************************************************************************
+
+`timescale 1ns/1ps
+
+module ddr2_phy_dq_iob #
+ (
+ parameter DQ_COL = 0,
+ parameter DQ_MS = 0,
+ parameter HIGH_PERFORMANCE_MODE = "TRUE"
+ )
+ (
+ input clk0,
+ input clk90,
+ input clkdiv0,
+ input rst90,
+ input dlyinc,
+ input dlyce,
+ input dlyrst,
+ input [1:0] dq_oe_n,
+ input dqs,
+ input ce,
+ input rd_data_sel,
+ input wr_data_rise,
+ input wr_data_fall,
+ output rd_data_rise,
+ output rd_data_fall,
+ inout ddr_dq
+ );
+
+ wire dq_iddr_clk;
+ wire dq_idelay;
+ wire dq_in;
+ wire dq_oe_n_r;
+ wire dq_out;
+ wire stg2a_out_fall;
+ wire stg2a_out_rise;
+ wire stg2b_out_fall;
+ wire stg2b_out_rise;
+ wire stg3a_out_fall;
+ wire stg3a_out_rise;
+ wire stg3b_out_fall;
+ wire stg3b_out_rise;
+
+ //***************************************************************************
+ // Directed routing constraints for route between IDDR and stage 2 capture
+ // in fabric.
+ // Only 2 out of the 12 wire declarations will be used for any given
+ // instantiation of this module.
+ // Varies according:
+ // (1) I/O column (left, center, right) used
+ // (2) Which I/O in I/O pair (master, slave) used
+ // Nomenclature: _Xy, X = column (0 = left, 1 = center, 2 = right),
+ // y = master or slave
+ //***************************************************************************
+
+ // master, left
+ (* syn_keep = "1", keep = "TRUE",
+ ROUTE = "{3;1;5vlx50tff1136;93a1e3bb!-1;-78112;-4200;S!0;-143;-1248!1;-452;0!2;2747;1575!3;2461;81!4;2732;-960!4;2732;-984!5;404;8!6;404;8!7;683;-568;L!8;843;24;L!}" *)
+ wire stg1_out_rise_0m;
+ (* syn_keep = "1", keep = "TRUE",
+ ROUTE = "{3;1;5vlx50tff1136;907923a!-1;-78112;-4192;S!0;-143;-1192!0;-143;-1272!1;-452;0!2;-452;0!3;2723;-385!4;2731;-311!5;3823;-1983!6;5209;1271!7;1394;3072!8;0;-8!9;404;8!10;0;-144!11;683;-536;L!12;404;8!14;843;8;L!}" *)
+ wire stg1_out_fall_0m;
+ // slave, left
+ (* syn_keep = "1", keep = "TRUE",
+ ROUTE = "{3;1;5vlx50tff1136;53bb9d6f!-1;-78112;-4600;S!0;-143;-712!1;-452;0!2;1008;-552!3;2780;1360!4;0;-8!5;0;-240!5;0;-264!6;404;8!7;404;8!8;683;-568;L!9;843;24;L!}" *)
+ wire stg1_out_rise_0s;
+ (* syn_keep = "1", keep = "TRUE",
+ ROUTE = "{3;1;5vlx50tff1136;46bf60d8!-1;-78112;-4592;S!0;-143;-800!1;-452;0!2;1040;1592!3;5875;-85!4;-3127;-843!4;-3127;-939!5;404;8!6;404;8!7;683;-696;L!8;843;-136;L!}" *)
+ wire stg1_out_fall_0s;
+ // master, center
+ (* syn_keep = "1", keep = "TRUE",
+ ROUTE = "{3;1;5vlx50tff1136;9ee47800!-1;-6504;-50024;S!0;-175;-1136!1;-484;0!2;-3208;1552!3;-4160;-2092!4;-1428;1172!4;-1428;1076!5;404;8!6;404;8!7;843;-152;L!8;683;-728;L!}" *)
+ wire stg1_out_rise_1m;
+ (* syn_keep = "1", keep = "TRUE",
+ ROUTE = "{3;1;5vlx50tff1136;e7df31c2!-1;-6504;-50016;S!0;-175;-1192!1;-484;0!2;-5701;1523!3;-3095;-715!3;-4423;2421!4;0;-8!5;1328;-3288!6;0;-240!7;404;8!8;404;8!9;683;-696;L!10;843;-136;L!}" *)
+ wire stg1_out_fall_1m;
+ // slave, center
+ (* syn_keep = "1", keep = "TRUE",
+ ROUTE = "{3;1;5vlx50tff1136;a8c11eb3!-1;-6504;-50424;S!0;-175;-856!1;-484;0!2;-5677;-337!3;1033;1217!3;-295;4353!4;0;-8!5;1328;-3288!6;0;-120!7;404;8!8;404;8!9;683;-696;L!10;843;-152;L!}" *)
+ wire stg1_out_rise_1s;
+ (* syn_keep = "1", keep = "TRUE",
+ ROUTE = "{3;1;5vlx50tff1136;ed30cce!-1;-6504;-50416;S!0;-175;-848!1;-484;0!2;-3192;-432!3;-1452;1368!3;-6645;85!4;0;-8!5;5193;1035!6;0;-264!7;404;8!8;404;8!9;683;-568;L!10;843;24;L!}" *)
+ wire stg1_out_fall_1s;
+ // master, right
+ (* syn_keep = "1", keep = "TRUE",
+ ROUTE = "{3;1;5vlx50tff1136;4d035a44!-1;54728;-108896;S!0;-175;-1248!1;-484;0!2;-3192;-424!3;-4208;2092!4;-1396;-972!4;-1396;-996!5;404;8!6;404;8!7;683;-568;L!8;843;24;L!}" *)
+ wire stg1_out_rise_2m;
+ (* syn_keep = "1", keep = "TRUE",
+ ROUTE = "{3;1;5vlx50tff1136;92ae8739!-1;54728;-108888;S!0;-175;-1272!1;-484;0!2;-5677;-329!3;-1691;-83!4;-1428;1076!4;-1428;1052!5;404;8!6;404;8!7;683;-728;L!8;843;-136;L!}" *)
+ wire stg1_out_fall_2m;
+ // slave, right
+ (* syn_keep = "1", keep = "TRUE",
+ ROUTE = "{3;1;5vlx50tff1136;9de34bf1!-1;54728;-109296;S!0;-175;-712!1;-484;0!2;-5685;-475!3;1041;1107!3;1041;1011!4;404;8!5;404;8!6;683;-536;L!7;843;24;L!}" *)
+ wire stg1_out_rise_2s;
+ (* syn_keep = "1", keep = "TRUE",
+ ROUTE = "{3;1;5vlx50tff1136;1df9e65d!-1;54728;-109288;S!0;-175;-800!1;-484;0!2;-3208;1608!3;-1436;-792!4;0;-8!5;0;-240!5;0;-144!6;404;8!7;404;8!8;843;-136;L!9;683;-696;L!}" *)
+ wire stg1_out_fall_2s;
+
+ //***************************************************************************
+ // Bidirectional I/O
+ //***************************************************************************
+
+ IOBUF u_iobuf_dq
+ (
+ .I (dq_out),
+ .T (dq_oe_n_r),
+ .IO (ddr_dq),
+ .O (dq_in)
+ );
+
+ //***************************************************************************
+ // Write (output) path
+ //***************************************************************************
+
+ // on a write, rising edge of DQS corresponds to rising edge of CLK180
+ // (aka falling edge of CLK0 -> rising edge DQS). We also know:
+ // 1. data must be driven 1/4 clk cycle before corresponding DQS edge
+ // 2. first rising DQS edge driven on falling edge of CLK0
+ // 3. rising data must be driven 1/4 cycle before falling edge of CLK0
+ // 4. therefore, rising data driven on rising edge of CLK
+ ODDR #
+ (
+ .SRTYPE("SYNC"),
+ .DDR_CLK_EDGE("SAME_EDGE")
+ )
+ u_oddr_dq
+ (
+ .Q (dq_out),
+ .C (clk90),
+ .CE (1'b1),
+ .D1 (wr_data_rise),
+ .D2 (wr_data_fall),
+ .R (1'b0),
+ .S (1'b0)
+ );
+
+ // make sure output is tri-state during reset (DQ_OE_N_R = 1)
+ ODDR #
+ (
+ .SRTYPE("ASYNC"),
+ .DDR_CLK_EDGE("SAME_EDGE")
+ )
+ u_tri_state_dq
+ (
+ .Q (dq_oe_n_r),
+ .C (clk90),
+ .CE (1'b1),
+ .D1 (dq_oe_n[0]),
+ .D2 (dq_oe_n[1]),
+ .R (1'b0),
+ .S (rst90)
+ );
+
+ //***************************************************************************
+ // Read data capture scheme description:
+ // Data capture consists of 3 ranks of flops, and a MUX
+ // 1. Rank 1 ("Stage 1"): IDDR captures delayed DDR DQ from memory using
+ // delayed DQS.
+ // - Data is split into 2 SDR streams, one each for rise and fall data.
+ // - BUFIO (DQS) input inverted to IDDR. IDDR configured in SAME_EDGE
+ // mode. This means that: (1) Q1 = fall data, Q2 = rise data,
+ // (2) Both rise and fall data are output on falling edge of DQS -
+ // rather than rise output being output on one edge of DQS, and fall
+ // data on the other edge if the IDDR were configured in OPPOSITE_EDGE
+ // mode. This simplifies Stage 2 capture (only one core clock edge
+ // used, removing effects of duty-cycle-distortion), and saves one
+ // fabric flop in Rank 3.
+ // 2. Rank 2 ("Stage 2"): Fabric flops are used to capture output of first
+ // rank into FPGA clock (CLK) domain. Each rising/falling SDR stream
+ // from IDDR is feed into two flops, one clocked off rising and one off
+ // falling edge of CLK. One of these flops is chosen, with the choice
+ // being the one that reduces # of DQ/DQS taps necessary to align Stage
+ // 1 and Stage 2. Same edge is used to capture both rise and fall SDR
+ // streams.
+ // 3. Rank 3 ("Stage 3"): Removes half-cycle paths in CLK domain from
+ // output of Rank 2. This stage, like Stage 2, is clocked by CLK. Note
+ // that Stage 3 can be expanded to also support SERDES functionality
+ // 4. Output MUX: Selects whether Stage 1 output is aligned to rising or
+ // falling edge of CLK (i.e. specifically this selects whether IDDR
+ // rise/fall output is transfered to rising or falling edge of CLK).
+ // Implementation:
+ // 1. Rank 1 is implemented using an IDDR primitive
+ // 2. Rank 2 is implemented using:
+ // - An RPM to fix the location of the capture flops near the DQ I/O.
+ // The exact RPM used depends on which I/O column (left, center,
+ // right) the DQ I/O is placed at - this affects the optimal location
+ // of the slice flops (or does it - can we always choose the two
+ // columns to slices to the immediate right of the I/O to use, no
+ // matter what the column?). The origin of the RPM must be set in the
+ // UCF file using the RLOC_ORIGIN constraint (where the original is
+ // based on the DQ I/O location).
+ // - Directed Routing Constraints ("DIRT strings") to fix the routing
+ // to the rank 2 fabric flops. This is done to minimize: (1) total
+ // route delay (and therefore minimize voltage/temperature-related
+ // variations), and (2) minimize skew both within each rising and
+ // falling data net, as well as between the rising and falling nets.
+ // The exact DIRT string used depends on: (1) which I/O column the
+ // DQ I/O is placed, and (2) whether the DQ I/O is placed on the
+ // "Master" or "Slave" I/O of a diff pair (DQ is not differential, but
+ // the routing will be affected by which of each I/O pair is used)
+ // 3. Rank 3 is implemented using fabric flops. No LOC or DIRT contraints
+ // are used, tools are expected to place these and meet PERIOD timing
+ // without constraints (constraints may be necessary for "full" designs,
+ // in this case, user may need to add LOC constraints - if this is the
+ // case, there are no constraints - other than meeting PERIOD timing -
+ // for rank 3 flops.
+ //***************************************************************************
+
+ //***************************************************************************
+ // MIG 2.2: Define AREA_GROUP = "DDR_CAPTURE_FFS" contain all RPM flops in
+ // design. In UCF file, add constraint:
+ // AREA_GROUP "DDR_CAPTURE_FFS" GROUP = CLOSED;
+ // This is done to prevent MAP from packing unrelated logic into
+ // the slices used by the RPMs. Doing so may cause the DIRT strings
+ // that define the IDDR -> fabric flop routing to later become
+ // unroutable during PAR because the unrelated logic placed by MAP
+ // may use routing resources required by the DIRT strings. MAP
+ // does not currently take into account DIRT strings when placing
+ // logic
+ //***************************************************************************
+
+ // IDELAY to delay incoming data for synchronization purposes
+ IODELAY #
+ (
+ .DELAY_SRC ("I"),
+ .IDELAY_TYPE ("VARIABLE"),
+ .HIGH_PERFORMANCE_MODE (HIGH_PERFORMANCE_MODE),
+ .IDELAY_VALUE (0),
+ .ODELAY_VALUE (0)
+ )
+ u_idelay_dq
+ (
+ .DATAOUT (dq_idelay),
+ .C (clkdiv0),
+ .CE (dlyce),
+ .DATAIN (),
+ .IDATAIN (dq_in),
+ .INC (dlyinc),
+ .ODATAIN (),
+ .RST (dlyrst),
+ .T ()
+ );
+
+ //***************************************************************************
+ // Rank 1 capture: Use IDDR to generate two SDR outputs
+ //***************************************************************************
+
+ // invert clock to IDDR in order to use SAME_EDGE mode (otherwise, we "run
+ // out of clocks" because DQS is not continuous
+ assign dq_iddr_clk = ~dqs;
+
+ //***************************************************************************
+ // Rank 2 capture: Use fabric flops to capture Rank 1 output. Use RPM and
+ // DIRT strings here.
+ // BEL ("Basic Element of Logic") and relative location constraints for
+ // second stage capture. C
+ // Varies according:
+ // (1) I/O column (left, center, right) used
+ // (2) Which I/O in I/O pair (master, slave) used
+ //***************************************************************************
+
+ // Six different cases for the different I/O column, master/slave
+ // combinations (can't seem to do this using a localparam, which
+ // would be easier, XST doesn't allow it)
+ generate
+ if ((DQ_MS == 1) && (DQ_COL == 0)) begin: gen_stg2_0m
+
+ //*****************************************************************
+ // master, left
+ //*****************************************************************
+
+ IDDR #
+ (
+ .DDR_CLK_EDGE ("SAME_EDGE")
+ )
+ u_iddr_dq
+ (
+ .Q1 (stg1_out_fall_0m),
+ .Q2 (stg1_out_rise_0m),
+ .C (dq_iddr_clk),
+ .CE (ce),
+ .D (dq_idelay),
+ .R (1'b0),
+ .S (1'b0)
+ );
+
+ //*********************************************************
+ // Slice #1 (posedge CLK): Used for:
+ // 1. IDDR transfer to CLK0 rising edge domain ("stg2a")
+ // 2. stg2 falling edge -> stg3 rising edge transfer
+ //*********************************************************
+
+ // Stage 2 capture
+ (* HU_SET = "stg2_capture", RLOC = "X2Y0", BEL = "DFF",
+ AREA_GROUP = "DDR_CAPTURE_FFS" *)
+ FDRSE u_ff_stg2a_fall
+ (
+ .Q (stg2a_out_fall),
+ .C (clk0),
+ .CE (1'b1),
+ .D (stg1_out_fall_0m),
+ .R (1'b0),
+ .S (1'b0)
+ )/* synthesis syn_preserve = 1 */
+ /* synthesis syn_replicate = 0 */;
+ (* HU_SET = "stg2_capture", RLOC = "X2Y0", BEL = "CFF",
+ AREA_GROUP = "DDR_CAPTURE_FFS" *)
+ FDRSE u_ff_stg2a_rise
+ (
+ .Q (stg2a_out_rise),
+ .C (clk0),
+ .CE (1'b1),
+ .D (stg1_out_rise_0m),
+ .R (1'b0),
+ .S (1'b0)
+ )/* synthesis syn_preserve = 1 */
+ /* synthesis syn_replicate = 0 */;
+ // Stage 3 falling -> rising edge translation
+ (* HU_SET = "stg2_capture", RLOC = "X2Y0", BEL = "BFF",
+ AREA_GROUP = "DDR_CAPTURE_FFS" *)
+ FDRSE u_ff_stg3b_fall
+ (
+ .Q (stg3b_out_fall),
+ .C (clk0),
+ .CE (1'b1),
+ .D (stg2b_out_fall),
+ .R (1'b0),
+ .S (1'b0)
+ )/* synthesis syn_preserve = 1 */
+ /* synthesis syn_replicate = 0 */;
+ (* HU_SET = "stg2_capture", RLOC = "X2Y0", BEL = "AFF",
+ AREA_GROUP = "DDR_CAPTURE_FFS" *)
+ FDRSE u_ff_stg3b_rise
+ (
+ .Q (stg3b_out_rise),
+ .C (clk0),
+ .CE (1'b1),
+ .D (stg2b_out_rise),
+ .R (1'b0),
+ .S (1'b0)
+ )/* synthesis syn_preserve = 1 */
+ /* synthesis syn_replicate = 0 */;
+
+ //*********************************************************
+ // Slice #2 (posedge CLK): Used for:
+ // 1. IDDR transfer to CLK0 falling edge domain ("stg2b")
+ //*********************************************************
+
+ (* HU_SET = "stg2_capture", RLOC = "X3Y0", BEL = "DFF",
+ AREA_GROUP = "DDR_CAPTURE_FFS" *)
+ FDRSE_1 u_ff_stg2b_fall
+ (
+ .Q (stg2b_out_fall),
+ .C (clk0),
+ .CE (1'b1),
+ .D (stg1_out_fall_0m),
+ .R (1'b0),
+ .S (1'b0)
+ )/* synthesis syn_preserve = 1 */
+ /* synthesis syn_replicate = 0 */;
+
+ (* HU_SET = "stg2_capture", RLOC = "X3Y0", BEL = "CFF",
+ AREA_GROUP = "DDR_CAPTURE_FFS" *)
+ FDRSE_1 u_ff_stg2b_rise
+ (
+ .Q (stg2b_out_rise),
+ .C (clk0),
+ .CE (1'b1),
+ .D (stg1_out_rise_0m),
+ .R (1'b0),
+ .S (1'b0)
+ )/* synthesis syn_preserve = 1 */
+ /* synthesis syn_replicate = 0 */;
+
+ end else if ((DQ_MS == 0) && (DQ_COL == 0)) begin: gen_stg2_0s
+
+ //*****************************************************************
+ // slave, left
+ //*****************************************************************
+
+ IDDR #
+ (
+ .DDR_CLK_EDGE ("SAME_EDGE")
+ )
+ u_iddr_dq
+ (
+ .Q1 (stg1_out_fall_0s),
+ .Q2 (stg1_out_rise_0s),
+ .C (dq_iddr_clk),
+ .CE (ce),
+ .D (dq_idelay),
+ .R (1'b0),
+ .S (1'b0)
+ );
+
+ (* HU_SET = "stg2_capture", RLOC = "X0Y0", BEL = "BFF",
+ AREA_GROUP = "DDR_CAPTURE_FFS" *)
+ FDRSE u_ff_stg2a_fall
+ (
+ .Q (stg2a_out_fall),
+ .C (clk0),
+ .CE (1'b1),
+ .D (stg1_out_fall_0s),
+ .R (1'b0),
+ .S (1'b0)
+ )/* synthesis syn_preserve = 1 */
+ /* synthesis syn_replicate = 0 */;
+ (* HU_SET = "stg2_capture", RLOC = "X0Y0", BEL = "CFF",
+ AREA_GROUP = "DDR_CAPTURE_FFS" *)
+ FDRSE u_ff_stg2a_rise
+ (
+ .Q (stg2a_out_rise),
+ .C (clk0),
+ .CE (1'b1),
+ .D (stg1_out_rise_0s),
+ .R (1'b0),
+ .S (1'b0)
+ )/* synthesis syn_preserve = 1 */
+ /* synthesis syn_replicate = 0 */;
+
+ (* HU_SET = "stg2_capture", RLOC = "X0Y0", BEL = "DFF",
+ AREA_GROUP = "DDR_CAPTURE_FFS" *)
+ FDRSE u_ff_stg3b_fall
+ (
+ .Q (stg3b_out_fall),
+ .C (clk0),
+ .CE (1'b1),
+ .D (stg2b_out_fall),
+ .R (1'b0),
+ .S (1'b0)
+ )/* synthesis syn_preserve = 1 */
+ /* synthesis syn_replicate = 0 */;
+ (* HU_SET = "stg2_capture", RLOC = "X0Y0", BEL = "AFF",
+ AREA_GROUP = "DDR_CAPTURE_FFS" *)
+ FDRSE u_ff_stg3b_rise
+ (
+ .Q (stg3b_out_rise),
+ .C (clk0),
+ .CE (1'b1),
+ .D (stg2b_out_rise),
+ .R (1'b0),
+ .S (1'b0)
+ )/* synthesis syn_preserve = 1 */
+ /* synthesis syn_replicate = 0 */;
+
+ (* HU_SET = "stg2_capture", RLOC = "X1Y0", BEL = "AFF",
+ AREA_GROUP = "DDR_CAPTURE_FFS" *)
+ FDRSE_1 u_ff_stg2b_fall
+ (
+ .Q (stg2b_out_fall),
+ .C (clk0),
+ .CE (1'b1),
+ .D (stg1_out_fall_0s),
+ .R (1'b0),
+ .S (1'b0)
+ )/* synthesis syn_preserve = 1 */
+ /* synthesis syn_replicate = 0 */;
+ (* HU_SET = "stg2_capture", RLOC = "X1Y0", BEL = "CFF",
+ AREA_GROUP = "DDR_CAPTURE_FFS" *)
+ FDRSE_1 u_ff_stg2b_rise
+ (
+ .Q (stg2b_out_rise),
+ .C (clk0),
+ .CE (1'b1),
+ .D (stg1_out_rise_0s),
+ .R (1'b0),
+ .S (1'b0)
+ )/* synthesis syn_preserve = 1 */
+ /* synthesis syn_replicate = 0 */;
+
+ end else if ((DQ_MS == 1) && (DQ_COL == 1)) begin: gen_stg2_1m
+
+ //*****************************************************************
+ // master, center
+ //*****************************************************************
+
+ IDDR #
+ (
+ .DDR_CLK_EDGE ("SAME_EDGE")
+ )
+ u_iddr_dq
+ (
+ .Q1 (stg1_out_fall_1m),
+ .Q2 (stg1_out_rise_1m),
+ .C (dq_iddr_clk),
+ .CE (ce),
+ .D (dq_idelay),
+ .R (1'b0),
+ .S (1'b0)
+ );
+
+ (* HU_SET = "stg2_capture", RLOC = "X0Y0", BEL = "BFF",
+ AREA_GROUP = "DDR_CAPTURE_FFS" *)
+ FDRSE u_ff_stg2a_fall
+ (
+ .Q (stg2a_out_fall),
+ .C (clk0),
+ .CE (1'b1),
+ .D (stg1_out_fall_1m),
+ .R (1'b0),
+ .S (1'b0)
+ )/* synthesis syn_preserve = 1 */
+ /* synthesis syn_replicate = 0 */;
+ (* HU_SET = "stg2_capture", RLOC = "X0Y0", BEL = "AFF",
+ AREA_GROUP = "DDR_CAPTURE_FFS" *)
+ FDRSE u_ff_stg2a_rise
+ (
+ .Q (stg2a_out_rise),
+ .C (clk0),
+ .CE (1'b1),
+ .D (stg1_out_rise_1m),
+ .R (1'b0),
+ .S (1'b0)
+ )/* synthesis syn_preserve = 1 */
+ /* synthesis syn_replicate = 0 */;
+
+ (* HU_SET = "stg2_capture", RLOC = "X0Y0", BEL = "DFF",
+ AREA_GROUP = "DDR_CAPTURE_FFS" *)
+ FDRSE u_ff_stg3b_fall
+ (
+ .Q (stg3b_out_fall),
+ .C (clk0),
+ .CE (1'b1),
+ .D (stg2b_out_fall),
+ .R (1'b0),
+ .S (1'b0)
+ )/* synthesis syn_preserve = 1 */
+ /* synthesis syn_replicate = 0 */;
+ (* HU_SET = "stg2_capture", RLOC = "X0Y0", BEL = "CFF",
+ AREA_GROUP = "DDR_CAPTURE_FFS" *)
+ FDRSE u_ff_stg3b_rise
+ (
+ .Q (stg3b_out_rise),
+ .C (clk0),
+ .CE (1'b1),
+ .D (stg2b_out_rise),
+ .R (1'b0),
+ .S (1'b0)
+ )/* synthesis syn_preserve = 1 */
+ /* synthesis syn_replicate = 0 */;
+
+ (* HU_SET = "stg2_capture", RLOC = "X1Y0", BEL = "AFF",
+ AREA_GROUP = "DDR_CAPTURE_FFS" *)
+ FDRSE_1 u_ff_stg2b_fall
+ (
+ .Q (stg2b_out_fall),
+ .C (clk0),
+ .CE (1'b1),
+ .D (stg1_out_fall_1m),
+ .R (1'b0),
+ .S (1'b0)
+ )/* synthesis syn_preserve = 1 */
+ /* synthesis syn_replicate = 0 */;
+ (* HU_SET = "stg2_capture", RLOC = "X1Y0", BEL = "BFF",
+ AREA_GROUP = "DDR_CAPTURE_FFS" *)
+ FDRSE_1 u_ff_stg2b_rise
+ (
+ .Q (stg2b_out_rise),
+ .C (clk0),
+ .CE (1'b1),
+ .D (stg1_out_rise_1m),
+ .R (1'b0),
+ .S (1'b0)
+ )/* synthesis syn_preserve = 1 */
+ /* synthesis syn_replicate = 0 */;
+
+ end else if ((DQ_MS == 0) && (DQ_COL == 1)) begin: gen_stg2_1s
+
+ //*****************************************************************
+ // slave, center
+ //*****************************************************************
+
+ IDDR #
+ (
+ .DDR_CLK_EDGE ("SAME_EDGE")
+ )
+ u_iddr_dq
+ (
+ .Q1 (stg1_out_fall_1s),
+ .Q2 (stg1_out_rise_1s),
+ .C (dq_iddr_clk),
+ .CE (ce),
+ .D (dq_idelay),
+ .R (1'b0),
+ .S (1'b0)
+ );
+
+ (* HU_SET = "stg2_capture", RLOC = "X2Y0", BEL = "CFF",
+ AREA_GROUP = "DDR_CAPTURE_FFS" *)
+ FDRSE u_ff_stg2a_fall
+ (
+ .Q (stg2a_out_fall),
+ .C (clk0),
+ .CE (1'b1),
+ .D (stg1_out_fall_1s),
+ .R (1'b0),
+ .S (1'b0)
+ )/* synthesis syn_preserve = 1 */
+ /* synthesis syn_replicate = 0 */;
+ (* HU_SET = "stg2_capture", RLOC = "X2Y0", BEL = "BFF",
+ AREA_GROUP = "DDR_CAPTURE_FFS" *)
+ FDRSE u_ff_stg2a_rise
+ (
+ .Q (stg2a_out_rise),
+ .C (clk0),
+ .CE (1'b1),
+ .D (stg1_out_rise_1s),
+ .R (1'b0),
+ .S (1'b0)
+ )/* synthesis syn_preserve = 1 */
+ /* synthesis syn_replicate = 0 */;
+
+ (* HU_SET = "stg2_capture", RLOC = "X2Y0", BEL = "DFF",
+ AREA_GROUP = "DDR_CAPTURE_FFS" *)
+ FDRSE u_ff_stg3b_fall
+ (
+ .Q (stg3b_out_fall),
+ .C (clk0),
+ .CE (1'b1),
+ .D (stg2b_out_fall),
+ .R (1'b0),
+ .S (1'b0)
+ )/* synthesis syn_preserve = 1 */
+ /* synthesis syn_replicate = 0 */;
+ (* HU_SET = "stg2_capture", RLOC = "X2Y0", BEL = "AFF",
+ AREA_GROUP = "DDR_CAPTURE_FFS" *)
+ FDRSE u_ff_stg3b_rise
+ (
+ .Q (stg3b_out_rise),
+ .C (clk0),
+ .CE (1'b1),
+ .D (stg2b_out_rise),
+ .R (1'b0),
+ .S (1'b0)
+ )/* synthesis syn_preserve = 1 */
+ /* synthesis syn_replicate = 0 */;
+
+ (* HU_SET = "stg2_capture", RLOC = "X3Y0", BEL = "CFF",
+ AREA_GROUP = "DDR_CAPTURE_FFS" *)
+ FDRSE_1 u_ff_stg2b_fall
+ (
+ .Q (stg2b_out_fall),
+ .C (clk0),
+ .CE (1'b1),
+ .D (stg1_out_fall_1s),
+ .R (1'b0),
+ .S (1'b0)
+ )/* synthesis syn_preserve = 1 */
+ /* synthesis syn_replicate = 0 */;
+ (* HU_SET = "stg2_capture", RLOC = "X3Y0", BEL = "BFF",
+ AREA_GROUP = "DDR_CAPTURE_FFS" *)
+ FDRSE_1 u_ff_stg2b_rise
+ (
+ .Q (stg2b_out_rise),
+ .C (clk0),
+ .CE (1'b1),
+ .D (stg1_out_rise_1s),
+ .R (1'b0),
+ .S (1'b0)
+ )/* synthesis syn_preserve = 1 */
+ /* synthesis syn_replicate = 0 */;
+
+ end else if ((DQ_MS == 1) && (DQ_COL == 2)) begin: gen_stg2_2m
+
+ //*****************************************************************
+ // master, right
+ //*****************************************************************
+
+ IDDR #
+ (
+ .DDR_CLK_EDGE ("SAME_EDGE")
+ )
+ u_iddr_dq
+ (
+ .Q1 (stg1_out_fall_2m),
+ .Q2 (stg1_out_rise_2m),
+ .C (dq_iddr_clk),
+ .CE (ce),
+ .D (dq_idelay),
+ .R (1'b0),
+ .S (1'b0)
+ );
+
+ (* HU_SET = "stg2_capture", RLOC = "X0Y0", BEL = "AFF",
+ AREA_GROUP = "DDR_CAPTURE_FFS" *)
+ FDRSE u_ff_stg2a_fall
+ (
+ .Q (stg2a_out_fall),
+ .C (clk0),
+ .CE (1'b1),
+ .D (stg1_out_fall_2m),
+ .R (1'b0),
+ .S (1'b0)
+ )/* synthesis syn_preserve = 1 */
+ /* synthesis syn_replicate = 0 */;
+ (* HU_SET = "stg2_capture", RLOC = "X0Y0", BEL = "CFF",
+ AREA_GROUP = "DDR_CAPTURE_FFS" *)
+ FDRSE u_ff_stg2a_rise
+ (
+ .Q (stg2a_out_rise),
+ .C (clk0),
+ .CE (1'b1),
+ .D (stg1_out_rise_2m),
+ .R (1'b0),
+ .S (1'b0)
+ )/* synthesis syn_preserve = 1 */
+ /* synthesis syn_replicate = 0 */;
+
+ (* HU_SET = "stg2_capture", RLOC = "X0Y0", BEL = "DFF",
+ AREA_GROUP = "DDR_CAPTURE_FFS" *)
+ FDRSE u_ff_stg3b_fall
+ (
+ .Q (stg3b_out_fall),
+ .C (clk0),
+ .CE (1'b1),
+ .D (stg2b_out_fall),
+ .R (1'b0),
+ .S (1'b0)
+ )/* synthesis syn_preserve = 1 */
+ /* synthesis syn_replicate = 0 */;
+ (* HU_SET = "stg2_capture", RLOC = "X0Y0", BEL = "BFF",
+ AREA_GROUP = "DDR_CAPTURE_FFS" *)
+ FDRSE u_ff_stg3b_rise
+ (
+ .Q (stg3b_out_rise),
+ .C (clk0),
+ .CE (1'b1),
+ .D (stg2b_out_rise),
+ .R (1'b0),
+ .S (1'b0)
+ )/* synthesis syn_preserve = 1 */
+ /* synthesis syn_replicate = 0 */;
+
+ (* HU_SET = "stg2_capture", RLOC = "X1Y0", BEL = "AFF",
+ AREA_GROUP = "DDR_CAPTURE_FFS" *)
+ FDRSE_1 u_ff_stg2b_fall
+ (
+ .Q (stg2b_out_fall),
+ .C (clk0),
+ .CE (1'b1),
+ .D (stg1_out_fall_2m),
+ .R (1'b0),
+ .S (1'b0)
+ )/* synthesis syn_preserve = 1 */
+ /* synthesis syn_replicate = 0 */;
+ (* HU_SET = "stg2_capture", RLOC = "X1Y0", BEL = "CFF",
+ AREA_GROUP = "DDR_CAPTURE_FFS" *)
+ FDRSE_1 u_ff_stg2b_rise
+ (
+ .Q (stg2b_out_rise),
+ .C (clk0),
+ .CE (1'b1),
+ .D (stg1_out_rise_2m),
+ .R (1'b0),
+ .S (1'b0)
+ )/* synthesis syn_preserve = 1 */
+ /* synthesis syn_replicate = 0 */;
+
+ end else if ((DQ_MS == 0) && (DQ_COL == 2)) begin: gen_stg2_2s
+
+ //*****************************************************************
+ // slave, right
+ //*****************************************************************
+
+ IDDR #
+ (
+ .DDR_CLK_EDGE ("SAME_EDGE")
+ )
+ u_iddr_dq
+ (
+ .Q1 (stg1_out_fall_2s),
+ .Q2 (stg1_out_rise_2s),
+ .C (dq_iddr_clk),
+ .CE (ce),
+ .D (dq_idelay),
+ .R (1'b0),
+ .S (1'b0)
+ );
+
+ (* HU_SET = "stg2_capture", RLOC = "X2Y0", BEL = "BFF",
+ AREA_GROUP = "DDR_CAPTURE_FFS" *)
+ FDRSE u_ff_stg2a_fall
+ (
+ .Q (stg2a_out_fall),
+ .C (clk0),
+ .CE (1'b1),
+ .D (stg1_out_fall_2s),
+ .R (1'b0),
+ .S (1'b0)
+ )/* synthesis syn_preserve = 1 */
+ /* synthesis syn_replicate = 0 */;
+ (* HU_SET = "stg2_capture", RLOC = "X2Y0", BEL = "DFF",
+ AREA_GROUP = "DDR_CAPTURE_FFS" *)
+ FDRSE u_ff_stg2a_rise
+ (
+ .Q (stg2a_out_rise),
+ .C (clk0),
+ .CE (1'b1),
+ .D (stg1_out_rise_2s),
+ .R (1'b0),
+ .S (1'b0)
+ )/* synthesis syn_preserve = 1 */
+ /* synthesis syn_replicate = 0 */;
+ (* HU_SET = "stg2_capture", RLOC = "X2Y0", BEL = "CFF",
+ AREA_GROUP = "DDR_CAPTURE_FFS" *)
+ FDRSE u_ff_stg3b_fall
+ (
+ .Q (stg3b_out_fall),
+ .C (clk0),
+ .CE (1'b1),
+ .D (stg2b_out_fall),
+ .R (1'b0),
+ .S (1'b0)
+ )/* synthesis syn_preserve = 1 */
+ /* synthesis syn_replicate = 0 */;
+ (* HU_SET = "stg2_capture", RLOC = "X2Y0", BEL = "AFF",
+ AREA_GROUP = "DDR_CAPTURE_FFS" *)
+ FDRSE u_ff_stg3b_rise
+ (
+ .Q (stg3b_out_rise),
+ .C (clk0),
+ .CE (1'b1),
+ .D (stg2b_out_rise),
+ .R (1'b0),
+ .S (1'b0)
+ )/* synthesis syn_preserve = 1 */
+ /* synthesis syn_replicate = 0 */;
+
+ (* HU_SET = "stg2_capture", RLOC = "X3Y0", BEL = "AFF",
+ AREA_GROUP = "DDR_CAPTURE_FFS" *)
+ FDRSE_1 u_ff_stg2b_fall
+ (
+ .Q (stg2b_out_fall),
+ .C (clk0),
+ .CE (1'b1),
+ .D (stg1_out_fall_2s),
+ .R (1'b0),
+ .S (1'b0)
+ )/* synthesis syn_preserve = 1 */
+ /* synthesis syn_replicate = 0 */;
+ (* HU_SET = "stg2_capture", RLOC = "X3Y0", BEL = "CFF",
+ AREA_GROUP = "DDR_CAPTURE_FFS" *)
+ FDRSE_1 u_ff_stg2b_rise
+ (
+ .Q (stg2b_out_rise),
+ .C (clk0),
+ .CE (1'b1),
+ .D (stg1_out_rise_2s),
+ .R (1'b0),
+ .S (1'b0)
+ )/* synthesis syn_preserve = 1 */
+ /* synthesis syn_replicate = 0 */;
+
+ end
+ endgenerate
+
+ //***************************************************************************
+ // Second stage flops clocked by posedge CLK0 don't need another layer of
+ // registering
+ //***************************************************************************
+
+ assign stg3a_out_rise = stg2a_out_rise;
+ assign stg3a_out_fall = stg2a_out_fall;
+
+ //*******************************************************************
+
+ assign rd_data_rise = (rd_data_sel) ? stg3a_out_rise : stg3b_out_rise;
+ assign rd_data_fall = (rd_data_sel) ? stg3a_out_fall : stg3b_out_fall;
+
+endmodule
--- /dev/null
+//*****************************************************************************
+// DISCLAIMER OF LIABILITY
+//
+// This text/file contains proprietary, confidential
+// information of Xilinx, Inc., is distributed under license
+// from Xilinx, Inc., and may be used, copied and/or
+// disclosed only pursuant to the terms of a valid license
+// agreement with Xilinx, Inc. Xilinx hereby grants you a
+// license to use this text/file solely for design, simulation,
+// implementation and creation of design files limited
+// to Xilinx devices or technologies. Use with non-Xilinx
+// devices or technologies is expressly prohibited and
+// immediately terminates your license unless covered by
+// a separate agreement.
+//
+// Xilinx is providing this design, code, or information
+// "as-is" solely for use in developing programs and
+// solutions for Xilinx devices, with no obligation on the
+// part of Xilinx to provide support. By providing this design,
+// code, or information as one possible implementation of
+// this feature, application or standard, Xilinx is making no
+// representation that this implementation is free from any
+// claims of infringement. You are responsible for
+// obtaining any rights you may require for your implementation.
+// Xilinx expressly disclaims any warranty whatsoever with
+// respect to the adequacy of the implementation, including
+// but not limited to any warranties or representations that this
+// implementation is free from claims of infringement, implied
+// warranties of merchantability or fitness for a particular
+// purpose.
+//
+// Xilinx products are not intended for use in life support
+// appliances, devices, or systems. Use in such applications is
+// expressly prohibited.
+//
+// Any modifications that are made to the Source Code are
+// done at the user\92s sole risk and will be unsupported.
+//
+// Copyright (c) 2006-2007 Xilinx, Inc. All rights reserved.
+//
+// This copyright and support notice must be retained as part
+// of this text at all times.
+//*****************************************************************************
+// ____ ____
+// / /\/ /
+// /___/ \ / Vendor: Xilinx
+// \ \ \/ Version: 2.3
+// \ \ Application: MIG
+// / / Filename: ddr2_phy_dqs_iob.v
+// /___/ /\ Date Last Modified: $Date: 2008/07/22 15:41:06 $
+// \ \ / \ Date Created: Wed Aug 16 2006
+// \___\/\___\
+//
+//Device: Virtex-5
+//Design Name: DDR2
+//Purpose:
+// This module places the data strobes in the IOBs.
+//Reference:
+//Revision History:
+//*****************************************************************************
+
+`timescale 1ns/1ps
+
+module ddr2_phy_dqs_iob #
+ (
+ parameter DDR_TYPE = 1,
+ parameter HIGH_PERFORMANCE_MODE = "TRUE"
+ )
+ (
+ input clk0,
+ input clkdiv0,
+ input rst0,
+ input dlyinc_dqs,
+ input dlyce_dqs,
+ input dlyrst_dqs,
+ input dlyinc_gate,
+ input dlyce_gate,
+ input dlyrst_gate,
+ input dqs_oe_n,
+ input dqs_rst_n,
+ input en_dqs,
+ inout ddr_dqs,
+ inout ddr_dqs_n,
+ output dq_ce,
+ output delayed_dqs
+ );
+
+ wire clk180;
+ wire dqs_bufio;
+
+ wire dqs_ibuf;
+ wire dqs_idelay;
+ wire dqs_oe_n_delay;
+ wire dqs_oe_n_r;
+ wire dqs_rst_n_delay;
+ reg dqs_rst_n_r /* synthesis syn_preserve = 1*/;
+ wire dqs_out;
+ wire en_dqs_sync /* synthesis syn_keep = 1 */;
+
+ // for simulation only. Synthesis should ignore this delay
+ localparam DQS_NET_DELAY = 0.8;
+
+ assign clk180 = ~clk0;
+
+ // add delta delay to inputs clocked by clk180 to avoid delta-delay
+ // simulation issues
+ assign dqs_rst_n_delay = dqs_rst_n;
+ assign dqs_oe_n_delay = dqs_oe_n;
+
+ //***************************************************************************
+ // DQS input-side resources:
+ // - IODELAY (pad -> IDELAY)
+ // - BUFIO (IDELAY -> BUFIO)
+ //***************************************************************************
+
+ // Route DQS from PAD to IDELAY
+ IODELAY #
+ (
+ .DELAY_SRC("I"),
+ .IDELAY_TYPE("VARIABLE"),
+ .HIGH_PERFORMANCE_MODE(HIGH_PERFORMANCE_MODE),
+ .IDELAY_VALUE(0),
+ .ODELAY_VALUE(0)
+ )
+ u_idelay_dqs
+ (
+ .DATAOUT (dqs_idelay),
+ .C (clkdiv0),
+ .CE (dlyce_dqs),
+ .DATAIN (),
+ .IDATAIN (dqs_ibuf),
+ .INC (dlyinc_dqs),
+ .ODATAIN (),
+ .RST (dlyrst_dqs),
+ .T ()
+ );
+
+ // From IDELAY to BUFIO
+ BUFIO u_bufio_dqs
+ (
+ .I (dqs_idelay),
+ .O (dqs_bufio)
+ );
+
+ // To model additional delay of DQS BUFIO + gating network
+ // for behavioral simulation. Make sure to select a delay number smaller
+ // than half clock cycle (otherwise output will not track input changes
+ // because of inertial delay). Duplicate to avoid delta delay issues.
+ assign #(DQS_NET_DELAY) i_delayed_dqs = dqs_bufio;
+ assign #(DQS_NET_DELAY) delayed_dqs = dqs_bufio;
+
+ //***************************************************************************
+ // DQS gate circuit (not supported for all controllers)
+ //***************************************************************************
+
+ // Gate routing:
+ // en_dqs -> IDELAY -> en_dqs_sync -> IDDR.S -> dq_ce ->
+ // capture IDDR.CE
+
+ // Delay CE control so that it's in phase with delayed DQS
+ IODELAY #
+ (
+ .DELAY_SRC ("DATAIN"),
+ .IDELAY_TYPE ("VARIABLE"),
+ .HIGH_PERFORMANCE_MODE (HIGH_PERFORMANCE_MODE),
+ .IDELAY_VALUE (0),
+ .ODELAY_VALUE (0)
+ )
+ u_iodelay_dq_ce
+ (
+ .DATAOUT (en_dqs_sync),
+ .C (clkdiv0),
+ .CE (dlyce_gate),
+ .DATAIN (en_dqs),
+ .IDATAIN (),
+ .INC (dlyinc_gate),
+ .ODATAIN (),
+ .RST (dlyrst_gate),
+ .T ()
+ );
+
+ // Generate sync'ed CE to DQ IDDR's using an IDDR clocked by DQS
+ // We could also instantiate a negative-edge SDR flop here
+ IDDR #
+ (
+ .DDR_CLK_EDGE ("OPPOSITE_EDGE"),
+ .INIT_Q1 (1'b0),
+ .INIT_Q2 (1'b0),
+ .SRTYPE ("ASYNC")
+ )
+ u_iddr_dq_ce
+ (
+ .Q1 (),
+ .Q2 (dq_ce), // output on falling edge
+ .C (i_delayed_dqs),
+ .CE (1'b1),
+ .D (en_dqs_sync),
+ .R (1'b0),
+ .S (en_dqs_sync)
+ );
+
+ //***************************************************************************
+ // DQS output-side resources
+ //***************************************************************************
+
+ // synthesis attribute keep of dqs_rst_n_r is "true"
+ always @(posedge clk180)
+ dqs_rst_n_r <= dqs_rst_n_delay;
+
+ ODDR #
+ (
+ .SRTYPE("SYNC"),
+ .DDR_CLK_EDGE("OPPOSITE_EDGE")
+ )
+ u_oddr_dqs
+ (
+ .Q (dqs_out),
+ .C (clk180),
+ .CE (1'b1),
+ .D1 (dqs_rst_n_r), // keep output deasserted for write preamble
+ .D2 (1'b0),
+ .R (1'b0),
+ .S (1'b0)
+ );
+
+ (* IOB = "TRUE" *) FDP u_tri_state_dqs
+ (
+ .D (dqs_oe_n_delay),
+ .Q (dqs_oe_n_r),
+ .C (clk180),
+ .PRE (rst0)
+ ) /* synthesis syn_useioff = 1 */;
+
+ //***************************************************************************
+
+ // use either single-ended (for DDR1) or differential (for DDR2) DQS input
+
+ generate
+ if (DDR_TYPE > 0) begin: gen_dqs_iob_ddr2
+ IOBUFDS u_iobuf_dqs
+ (
+ .O (dqs_ibuf),
+ .IO (ddr_dqs),
+ .IOB (ddr_dqs_n),
+ .I (dqs_out),
+ .T (dqs_oe_n_r)
+ );
+ defparam u_iobuf_dqs.IOSTANDARD="DIFF_SSTL18_II_DCI";
+ end else begin: gen_dqs_iob_ddr1
+ IOBUF u_iobuf_dqs
+ (
+ .O (dqs_ibuf),
+ .IO (ddr_dqs),
+ .I (dqs_out),
+ .T (dqs_oe_n_r)
+ );
+ end
+ endgenerate
+
+endmodule
--- /dev/null
+//*****************************************************************************
+// DISCLAIMER OF LIABILITY
+//
+// This text/file contains proprietary, confidential
+// information of Xilinx, Inc., is distributed under license
+// from Xilinx, Inc., and may be used, copied and/or
+// disclosed only pursuant to the terms of a valid license
+// agreement with Xilinx, Inc. Xilinx hereby grants you a
+// license to use this text/file solely for design, simulation,
+// implementation and creation of design files limited
+// to Xilinx devices or technologies. Use with non-Xilinx
+// devices or technologies is expressly prohibited and
+// immediately terminates your license unless covered by
+// a separate agreement.
+//
+// Xilinx is providing this design, code, or information
+// "as-is" solely for use in developing programs and
+// solutions for Xilinx devices, with no obligation on the
+// part of Xilinx to provide support. By providing this design,
+// code, or information as one possible implementation of
+// this feature, application or standard, Xilinx is making no
+// representation that this implementation is free from any
+// claims of infringement. You are responsible for
+// obtaining any rights you may require for your implementation.
+// Xilinx expressly disclaims any warranty whatsoever with
+// respect to the adequacy of the implementation, including
+// but not limited to any warranties or representations that this
+// implementation is free from claims of infringement, implied
+// warranties of merchantability or fitness for a particular
+// purpose.
+//
+// Xilinx products are not intended for use in life support
+// appliances, devices, or systems. Use in such applications is
+// expressly prohibited.
+//
+// Any modifications that are made to the Source Code are
+// done at the user�s sole risk and will be unsupported.
+//
+// Copyright (c) 2006-2007 Xilinx, Inc. All rights reserved.
+//
+// This copyright and support notice must be retained as part
+// of this text at all times.
+//*****************************************************************************
+// ____ ____
+// / /\/ /
+// /___/ \ / Vendor: Xilinx
+// \ \ \/ Version: 2.3
+// \ \ Application: MIG
+// / / Filename: ddr2_phy_init.v
+// /___/ /\ Date Last Modified: $Date: 2008/07/22 15:41:06 $
+// \ \ / \ Date Created: Thu Aug 24 2006
+// \___\/\___\
+//
+//Device: Virtex-5
+//Design Name: DDR2
+//Purpose:
+//Reference:
+// This module is the intialization control logic of the memory interface.
+// All commands are issued from here acoording to the burst, CAS Latency and
+// the user commands.
+//Revision History:
+//*****************************************************************************
+
+`timescale 1ns/1ps
+
+module ddr2_phy_init #
+ (
+ // Following parameters are for 72-bit RDIMM design (for ML561 Reference
+ // board design). Actual values may be different. Actual parameters values
+ // are passed from design top module ddr2_sdram module. Please refer to
+ // the ddr2_sdram module for actual values.
+ parameter BANK_WIDTH = 2,
+ parameter CKE_WIDTH = 1,
+ parameter COL_WIDTH = 10,
+ parameter CS_NUM = 1,
+ parameter DQ_WIDTH = 72,
+ parameter ODT_WIDTH = 1,
+ parameter ROW_WIDTH = 14,
+ parameter ADDITIVE_LAT = 0,
+ parameter BURST_LEN = 4,
+ parameter TWO_T_TIME_EN = 0,
+ parameter BURST_TYPE = 0,
+ parameter CAS_LAT = 5,
+ parameter ODT_TYPE = 1,
+ parameter REDUCE_DRV = 0,
+ parameter REG_ENABLE = 1,
+ parameter TWR = 15000,
+ parameter CLK_PERIOD = 3000,
+ parameter DDR_TYPE = 1,
+ parameter SIM_ONLY = 0
+ )
+ (
+ input clk0,
+ input clkdiv0,
+ input rst0,
+ input rstdiv0,
+ input [3:0] calib_done,
+ input ctrl_ref_flag,
+ input calib_ref_req,
+ output reg [3:0] calib_start,
+ output reg calib_ref_done,
+ output reg phy_init_wren,
+ output reg phy_init_rden,
+ output [ROW_WIDTH-1:0] phy_init_addr,
+ output [BANK_WIDTH-1:0] phy_init_ba,
+ output phy_init_ras_n,
+ output phy_init_cas_n,
+ output phy_init_we_n,
+ output [CS_NUM-1:0] phy_init_cs_n,
+ output [CKE_WIDTH-1:0] phy_init_cke,
+ output reg phy_init_done,
+ output phy_init_data_sel
+ );
+
+ // time to wait between consecutive commands in PHY_INIT - this is a
+ // generic number, and must be large enough to account for worst case
+ // timing parameter (tRFC - refresh-to-active) across all memory speed
+ // grades and operating frequencies. Expressed in CLKDIV clock cycles.
+ localparam CNTNEXT_CMD = 7'b1111111;
+ // time to wait between read and read or precharge for stage 3 & 4
+ // the larger CNTNEXT_CMD can also be used, use smaller number to
+ // speed up calibration - avoid tRAS violation, and speeds up simulation
+ localparam CNTNEXT_RD = 4'b1111;
+
+ // Write recovery (WR) time - is defined by
+ // tWR (in nanoseconds) by tCK (in nanoseconds) and rounding up a
+ // noninteger value to the next integer
+ localparam integer WR_RECOVERY = ((TWR + CLK_PERIOD) - 1)/CLK_PERIOD;
+
+ localparam INIT_CAL1_READ = 5'h00;
+ localparam INIT_CAL2_READ = 5'h01;
+ localparam INIT_CAL3_READ = 5'h02;
+ localparam INIT_CAL4_READ = 5'h03;
+ localparam INIT_CAL1_WRITE = 5'h04;
+ localparam INIT_CAL2_WRITE = 5'h05;
+ localparam INIT_CAL3_WRITE = 5'h06;
+ localparam INIT_DUMMY_ACTIVE_WAIT = 5'h07;
+ localparam INIT_PRECHARGE = 5'h08;
+ localparam INIT_LOAD_MODE = 5'h09;
+ localparam INIT_AUTO_REFRESH = 5'h0A;
+ localparam INIT_IDLE = 5'h0B;
+ localparam INIT_CNT_200 = 5'h0C;
+ localparam INIT_CNT_200_WAIT = 5'h0D;
+ localparam INIT_PRECHARGE_WAIT = 5'h0E;
+ localparam INIT_MODE_REGISTER_WAIT = 5'h0F;
+ localparam INIT_AUTO_REFRESH_WAIT = 5'h10;
+ localparam INIT_DEEP_MEMORY_ST = 5'h11;
+ localparam INIT_DUMMY_ACTIVE = 5'h12;
+ localparam INIT_CAL1_WRITE_READ = 5'h13;
+ localparam INIT_CAL1_READ_WAIT = 5'h14;
+ localparam INIT_CAL2_WRITE_READ = 5'h15;
+ localparam INIT_CAL2_READ_WAIT = 5'h16;
+ localparam INIT_CAL3_WRITE_READ = 5'h17;
+ localparam INIT_CAL3_READ_WAIT = 5'h18;
+ localparam INIT_CAL4_READ_WAIT = 5'h19;
+ localparam INIT_CALIB_REF = 5'h1A;
+ localparam INIT_ZQCL = 5'h1B;
+ localparam INIT_WAIT_DLLK_ZQINIT = 5'h1C;
+
+ localparam INIT_CNTR_INIT = 4'h0;
+ localparam INIT_CNTR_PRECH_1 = 4'h1;
+ localparam INIT_CNTR_EMR2_INIT = 4'h2;
+ localparam INIT_CNTR_EMR3_INIT = 4'h3;
+ localparam INIT_CNTR_EMR_EN_DLL = 4'h4;
+ localparam INIT_CNTR_MR_RST_DLL = 4'h5;
+ localparam INIT_CNTR_CNT_200_WAIT = 4'h6;
+ localparam INIT_CNTR_PRECH_2 = 4'h7;
+ localparam INIT_CNTR_AR_1 = 4'h8;
+ localparam INIT_CNTR_AR_2 = 4'h9;
+ localparam INIT_CNTR_MR_ACT_DLL = 4'hA;
+ localparam INIT_CNTR_EMR_DEF_OCD = 4'hB;
+ localparam INIT_CNTR_EMR_EXIT_OCD = 4'hC;
+ localparam INIT_CNTR_DEEP_MEM = 4'hD;
+ localparam INIT_CNTR_PRECH_3 = 4'hE;
+ localparam INIT_CNTR_DONE = 4'hF;
+
+ localparam DDR1 = 0;
+ localparam DDR2 = 1;
+ localparam DDR3 = 2;
+
+
+ reg [1:0] burst_addr_r;
+ reg [1:0] burst_cnt_r;
+ wire [1:0] burst_val;
+ wire cal_read;
+ wire cal_write;
+ wire cal_write_read;
+ reg cal1_started_r;
+ reg cal2_started_r;
+ reg cal4_started_r;
+ reg [3:0] calib_done_r;
+ reg calib_ref_req_posedge;
+ reg calib_ref_req_r;
+ reg [15:0] calib_start_shift0_r;
+ reg [15:0] calib_start_shift1_r;
+ reg [15:0] calib_start_shift2_r;
+ reg [15:0] calib_start_shift3_r;
+ reg [1:0] chip_cnt_r;
+ reg [4:0] cke_200us_cnt_r;
+ reg cke_200us_cnt_en_r;
+ reg [7:0] cnt_200_cycle_r;
+ reg cnt_200_cycle_done_r;
+ reg [6:0] cnt_cmd_r;
+ reg cnt_cmd_ok_r;
+ reg [3:0] cnt_rd_r;
+ reg cnt_rd_ok_r;
+ reg ctrl_ref_flag_r;
+ reg done_200us_r;
+ reg [ROW_WIDTH-1:0] ddr_addr_r;
+ reg [ROW_WIDTH-1:0] ddr_addr_r1;
+ reg [BANK_WIDTH-1:0] ddr_ba_r;
+ reg [BANK_WIDTH-1:0] ddr_ba_r1;
+ reg ddr_cas_n_r;
+ reg ddr_cas_n_r1;
+ reg [CKE_WIDTH-1:0] ddr_cke_r;
+ reg [CS_NUM-1:0] ddr_cs_n_r;
+ reg [CS_NUM-1:0] ddr_cs_n_r1;
+ reg [CS_NUM-1:0] ddr_cs_disable_r;
+ reg ddr_ras_n_r;
+ reg ddr_ras_n_r1;
+ reg ddr_we_n_r;
+ reg ddr_we_n_r1;
+ wire [15:0] ext_mode_reg;
+ reg [3:0] init_cnt_r;
+ reg init_done_r;
+ reg [4:0] init_next_state;
+ reg [4:0] init_state_r;
+ reg [4:0] init_state_r1;
+ reg [4:0] init_state_r2;
+ wire [15:0] load_mode_reg;
+ wire [15:0] load_mode_reg0;
+ wire [15:0] load_mode_reg1;
+ wire [15:0] load_mode_reg2;
+ wire [15:0] load_mode_reg3;
+ reg phy_init_done_r;
+ reg phy_init_done_r1;
+ reg phy_init_done_r2;
+ reg phy_init_done_r3;
+ reg refresh_req;
+ wire [3:0] start_cal;
+
+ //***************************************************************************
+
+ //*****************************************************************
+ // DDR1 and DDR2 Load mode register
+ // Mode Register (MR):
+ // [15:14] - unused - 00
+ // [13] - reserved - 0
+ // [12] - Power-down mode - 0 (normal)
+ // [11:9] - write recovery - for Auto Precharge (tWR/tCK)
+ // [8] - DLL reset - 0 or 1
+ // [7] - Test Mode - 0 (normal)
+ // [6:4] - CAS latency - CAS_LAT
+ // [3] - Burst Type - BURST_TYPE
+ // [2:0] - Burst Length - BURST_LEN
+ //*****************************************************************
+
+ generate
+ if (DDR_TYPE == DDR2) begin: gen_load_mode_reg_ddr2
+ assign load_mode_reg[2:0] = (BURST_LEN == 8) ? 3'b011 :
+ ((BURST_LEN == 4) ? 3'b010 : 3'b111);
+ assign load_mode_reg[3] = BURST_TYPE;
+ assign load_mode_reg[6:4] = (CAS_LAT == 3) ? 3'b011 :
+ ((CAS_LAT == 4) ? 3'b100 :
+ ((CAS_LAT == 5) ? 3'b101 : 3'b111));
+ assign load_mode_reg[7] = 1'b0;
+ assign load_mode_reg[8] = 1'b0; // init value only (DLL not reset)
+ assign load_mode_reg[11:9] = (WR_RECOVERY == 6) ? 3'b101 :
+ ((WR_RECOVERY == 5) ? 3'b100 :
+ ((WR_RECOVERY == 4) ? 3'b011 :
+ ((WR_RECOVERY == 3) ? 3'b010 :
+ 3'b001)));
+ assign load_mode_reg[15:12] = 4'b000;
+ end else if (DDR_TYPE == DDR1)begin: gen_load_mode_reg_ddr1
+ assign load_mode_reg[2:0] = (BURST_LEN == 8) ? 3'b011 :
+ ((BURST_LEN == 4) ? 3'b010 :
+ ((BURST_LEN == 2) ? 3'b001 : 3'b111));
+ assign load_mode_reg[3] = BURST_TYPE;
+ assign load_mode_reg[6:4] = (CAS_LAT == 2) ? 3'b010 :
+ ((CAS_LAT == 3) ? 3'b011 :
+ ((CAS_LAT == 25) ? 3'b110 : 3'b111));
+ assign load_mode_reg[12:7] = 6'b000000; // init value only
+ assign load_mode_reg[15:13] = 3'b000;
+ end
+ endgenerate
+
+ //*****************************************************************
+ // DDR1 and DDR2 ext mode register
+ // Extended Mode Register (MR):
+ // [15:14] - unused - 00
+ // [13] - reserved - 0
+ // [12] - output enable - 0 (enabled)
+ // [11] - RDQS enable - 0 (disabled)
+ // [10] - DQS# enable - 0 (enabled)
+ // [9:7] - OCD Program - 111 or 000 (first 111, then 000 during init)
+ // [6] - RTT[1] - RTT[1:0] = 0(no ODT), 1(75), 2(150), 3(50)
+ // [5:3] - Additive CAS - ADDITIVE_CAS
+ // [2] - RTT[0]
+ // [1] - Output drive - REDUCE_DRV (= 0(full), = 1 (reduced)
+ // [0] - DLL enable - 0 (normal)
+ //*****************************************************************
+
+ generate
+ if (DDR_TYPE == DDR2) begin: gen_ext_mode_reg_ddr2
+ assign ext_mode_reg[0] = 1'b0;
+ assign ext_mode_reg[1] = REDUCE_DRV;
+ assign ext_mode_reg[2] = ((ODT_TYPE == 1) || (ODT_TYPE == 3)) ?
+ 1'b1 : 1'b0;
+ assign ext_mode_reg[5:3] = (ADDITIVE_LAT == 0) ? 3'b000 :
+ ((ADDITIVE_LAT == 1) ? 3'b001 :
+ ((ADDITIVE_LAT == 2) ? 3'b010 :
+ ((ADDITIVE_LAT == 3) ? 3'b011 :
+ ((ADDITIVE_LAT == 4) ? 3'b100 :
+ 3'b111))));
+ assign ext_mode_reg[6] = ((ODT_TYPE == 2) || (ODT_TYPE == 3)) ?
+ 1'b1 : 1'b0;
+ assign ext_mode_reg[9:7] = 3'b000;
+ assign ext_mode_reg[10] = 1'b0;
+ assign ext_mode_reg[15:10] = 6'b000000;
+ end else if (DDR_TYPE == DDR1)begin: gen_ext_mode_reg_ddr1
+ assign ext_mode_reg[0] = 1'b0;
+ assign ext_mode_reg[1] = REDUCE_DRV;
+ assign ext_mode_reg[12:2] = 11'b00000000000;
+ assign ext_mode_reg[15:13] = 3'b000;
+ end
+ endgenerate
+
+ //*****************************************************************
+ // DDR3 Load mode reg0
+ // Mode Register (MR0):
+ // [15:13] - unused - 000
+ // [12] - Precharge Power-down DLL usage - 0 (DLL frozen, slow-exit),
+ // 1 (DLL maintained)
+ // [11:9] - write recovery for Auto Precharge (tWR/tCK = 6)
+ // [8] - DLL reset - 0 or 1
+ // [7] - Test Mode - 0 (normal)
+ // [6:4],[2] - CAS latency - CAS_LAT
+ // [3] - Burst Type - BURST_TYPE
+ // [1:0] - Burst Length - BURST_LEN
+ //*****************************************************************
+
+ generate
+ if (DDR_TYPE == DDR3) begin: gen_load_mode_reg0_ddr3
+ assign load_mode_reg0[1:0] = (BURST_LEN == 8) ? 2'b00 :
+ ((BURST_LEN == 4) ? 2'b10 : 2'b11);
+ // Part of CAS latency. This bit is '0' for all CAS latencies
+ assign load_mode_reg0[2] = 1'b0;
+ assign load_mode_reg0[3] = BURST_TYPE;
+ assign load_mode_reg0[6:4] = (CAS_LAT == 5) ? 3'b001 :
+ (CAS_LAT == 6) ? 3'b010 : 3'b111;
+ assign load_mode_reg0[7] = 1'b0;
+ // init value only (DLL reset)
+ assign load_mode_reg0[8] = 1'b1;
+ assign load_mode_reg0[11:9] = 3'b010;
+ // Precharge Power-Down DLL 'slow-exit'
+ assign load_mode_reg0[12] = 1'b0;
+ assign load_mode_reg0[15:13] = 3'b000;
+ end
+ endgenerate
+
+ //*****************************************************************
+ // DDR3 Load mode reg1
+ // Mode Register (MR1):
+ // [15:13] - unused - 00
+ // [12] - output enable - 0 (enabled for DQ, DQS, DQS#)
+ // [11] - TDQS enable - 0 (TDQS disabled and DM enabled)
+ // [10] - reserved - 0 (must be '0')
+ // [9] - RTT[2] - 0
+ // [8] - reserved - 0 (must be '0')
+ // [7] - write leveling - 0 (disabled), 1 (enabled)
+ // [6] - RTT[1] - RTT[1:0] = 0(no ODT), 1(75), 2(150), 3(50)
+ // [5] - Output driver impedance[1] - 0 (RZQ/6 and RZQ/7)
+ // [4:3] - Additive CAS - ADDITIVE_CAS
+ // [2] - RTT[0]
+ // [1] - Output driver impedance[0] - 0(RZQ/6), or 1 (RZQ/7)
+ // [0] - DLL enable - 0 (normal)
+ //*****************************************************************
+
+ generate
+ if (DDR_TYPE == DDR3) begin: gen_ext_mode_reg1_ddr3
+ // DLL enabled during Imitialization
+ assign load_mode_reg1[0] = 1'b0;
+ // RZQ/6
+ assign load_mode_reg1[1] = REDUCE_DRV;
+ assign load_mode_reg1[2] = ((ODT_TYPE == 1) || (ODT_TYPE == 3)) ?
+ 1'b1 : 1'b0;
+ assign load_mode_reg1[4:3] = (ADDITIVE_LAT == 0) ? 2'b00 :
+ ((ADDITIVE_LAT == 1) ? 2'b01 :
+ ((ADDITIVE_LAT == 2) ? 2'b10 :
+ 3'b111));
+ // RZQ/6
+ assign load_mode_reg1[5] = 1'b0;
+ assign load_mode_reg1[6] = ((ODT_TYPE == 2) || (ODT_TYPE == 3)) ?
+ 1'b1 : 1'b0;
+ // Make zero WRITE_LEVEL
+ assign load_mode_reg1[7] = 0;
+ assign load_mode_reg1[8] = 1'b0;
+ assign load_mode_reg1[9] = 1'b0;
+ assign load_mode_reg1[10] = 1'b0;
+ assign load_mode_reg1[15:11] = 5'b00000;
+ end
+ endgenerate
+
+ //*****************************************************************
+ // DDR3 Load mode reg2
+ // Mode Register (MR2):
+ // [15:11] - unused - 00
+ // [10:9] - RTT_WR - 00 (Dynamic ODT off)
+ // [8] - reserved - 0 (must be '0')
+ // [7] - self-refresh temperature range -
+ // 0 (normal), 1 (extended)
+ // [6] - Auto Self-Refresh - 0 (manual), 1(auto)
+ // [5:3] - CAS Write Latency (CWL) -
+ // 000 (5 for 400 MHz device),
+ // 001 (6 for 400 MHz to 533 MHz devices),
+ // 010 (7 for 533 MHz to 667 MHz devices),
+ // 011 (8 for 667 MHz to 800 MHz)
+ // [2:0] - Partial Array Self-Refresh (Optional) -
+ // 000 (full array)
+ //*****************************************************************
+
+ generate
+ if (DDR_TYPE == DDR3) begin: gen_ext_mode_reg2_ddr3
+ assign load_mode_reg2[2:0] = 3'b000;
+ assign load_mode_reg2[5:3] = (CAS_LAT == 5) ? 3'b000 :
+ (CAS_LAT == 6) ? 3'b001 : 3'b111;
+ assign load_mode_reg2[6] = 1'b0; // Manual Self-Refresh
+ assign load_mode_reg2[7] = 1'b0;
+ assign load_mode_reg2[8] = 1'b0;
+ assign load_mode_reg2[10:9] = 2'b00;
+ assign load_mode_reg2[15:11] = 5'b00000;
+ end
+ endgenerate
+
+ //*****************************************************************
+ // DDR3 Load mode reg3
+ // Mode Register (MR3):
+ // [15:3] - unused - All zeros
+ // [2] - MPR Operation - 0(normal operation), 1(data flow from MPR)
+ // [1:0] - MPR location - 00 (Predefined pattern)
+ //*****************************************************************
+
+ generate
+ if (DDR_TYPE == DDR3)begin: gen_ext_mode_reg3_ddr3
+ assign load_mode_reg3[1:0] = 2'b00;
+ assign load_mode_reg3[2] = 1'b0;
+ assign load_mode_reg3[15:3] = 13'b0000000000000;
+ end
+ endgenerate
+
+ //***************************************************************************
+ // Logic for calibration start, and for auto-refresh during cal request
+ // CALIB_REF_REQ is used by calibration logic to request auto-refresh
+ // durign calibration (used to avoid tRAS violation is certain calibration
+ // stages take a long time). Once the auto-refresh is complete and cal can
+ // be resumed, CALIB_REF_DONE is asserted by PHY_INIT.
+ //***************************************************************************
+
+ // generate pulse for each of calibration start controls
+ assign start_cal[0] = ((init_state_r1 == INIT_CAL1_READ) &&
+ (init_state_r2 != INIT_CAL1_READ));
+ assign start_cal[1] = ((init_state_r1 == INIT_CAL2_READ) &&
+ (init_state_r2 != INIT_CAL2_READ));
+ assign start_cal[2] = ((init_state_r1 == INIT_CAL3_READ) &&
+ (init_state_r2 == INIT_CAL3_WRITE_READ));
+ assign start_cal[3] = ((init_state_r1 == INIT_CAL4_READ) &&
+ (init_state_r2 == INIT_DUMMY_ACTIVE_WAIT));
+
+ // Generate positive-edge triggered, latched signal to force initialization
+ // to pause calibration, and to issue auto-refresh. Clear flag as soon as
+ // refresh initiated
+ always @(posedge clkdiv0)
+ if (rstdiv0) begin
+ calib_ref_req_r <= 1'b0;
+ calib_ref_req_posedge <= 1'b0;
+ refresh_req <= 1'b0;
+ end else begin
+ calib_ref_req_r <= calib_ref_req;
+ calib_ref_req_posedge <= calib_ref_req & ~calib_ref_req_r;
+ if (init_state_r1 == INIT_AUTO_REFRESH)
+ refresh_req <= 1'b0;
+ else if (calib_ref_req_posedge)
+ refresh_req <= 1'b1;
+ end
+
+ // flag to tell cal1 calibration was started.
+ // This flag is used for cal1 auto refreshes
+ // some of these bits may not be needed - only needed for those stages that
+ // need refreshes within the stage (i.e. very long stages)
+ always @(posedge clkdiv0)
+ if (rstdiv0) begin
+ cal1_started_r <= 1'b0;
+ cal2_started_r <= 1'b0;
+ cal4_started_r <= 1'b0;
+ end else begin
+ if (calib_start[0])
+ cal1_started_r <= 1'b1;
+ if (calib_start[1])
+ cal2_started_r <= 1'b1;
+ if (calib_start[3])
+ cal4_started_r <= 1'b1;
+ end
+
+ // Delay start of each calibration by 16 clock cycles to
+ // ensure that when calibration logic begins, that read data is already
+ // appearing on the bus. Don't really need it, it's more for simulation
+ // purposes. Each circuit should synthesize using an SRL16.
+ // In first stage of calibration periodic auto refreshes
+ // will be issued to meet memory timing. calib_start_shift0_r[15] will be
+ // asserted more than once.calib_start[0] is anded with cal1_started_r so
+ // that it is asserted only once. cal1_refresh_done is anded with
+ // cal1_started_r so that it is asserted after the auto refreshes.
+ always @(posedge clkdiv0) begin
+ calib_start_shift0_r <= {calib_start_shift0_r[14:0], start_cal[0]};
+ calib_start_shift1_r <= {calib_start_shift1_r[14:0], start_cal[1]};
+ calib_start_shift2_r <= {calib_start_shift2_r[14:0], start_cal[2]};
+ calib_start_shift3_r <= {calib_start_shift3_r[14:0], start_cal[3]};
+ calib_start[0] <= calib_start_shift0_r[15] & ~cal1_started_r;
+ calib_start[1] <= calib_start_shift1_r[15] & ~cal2_started_r;
+ calib_start[2] <= calib_start_shift2_r[15];
+ calib_start[3] <= calib_start_shift3_r[15] & ~cal4_started_r;
+ calib_ref_done <= calib_start_shift0_r[15] |
+ calib_start_shift1_r[15] |
+ calib_start_shift3_r[15];
+ end
+
+ // generate delay for various states that require it (no maximum delay
+ // requirement, make sure that terminal count is large enough to cover
+ // all cases)
+ always @(posedge clkdiv0) begin
+ case (init_state_r)
+ INIT_PRECHARGE_WAIT,
+ INIT_MODE_REGISTER_WAIT,
+ INIT_AUTO_REFRESH_WAIT,
+ INIT_DUMMY_ACTIVE_WAIT,
+ INIT_CAL1_WRITE_READ,
+ INIT_CAL1_READ_WAIT,
+ INIT_CAL2_WRITE_READ,
+ INIT_CAL2_READ_WAIT,
+ INIT_CAL3_WRITE_READ:
+ cnt_cmd_r <= cnt_cmd_r + 1;
+ default:
+ cnt_cmd_r <= 7'b0000000;
+ endcase
+ end
+
+ // assert when count reaches the value
+ always @(posedge clkdiv0) begin
+ if(cnt_cmd_r == CNTNEXT_CMD)
+ cnt_cmd_ok_r <= 1'b1;
+ else
+ cnt_cmd_ok_r <= 1'b0;
+ end
+
+ always @(posedge clkdiv0) begin
+ case (init_state_r)
+ INIT_CAL3_READ_WAIT,
+ INIT_CAL4_READ_WAIT:
+ cnt_rd_r <= cnt_rd_r + 1;
+ default:
+ cnt_rd_r <= 4'b0000;
+ endcase
+ end
+
+ always @(posedge clkdiv0) begin
+ if(cnt_rd_r == CNTNEXT_RD)
+ cnt_rd_ok_r <= 1'b1;
+ else
+ cnt_rd_ok_r <= 1'b0;
+ end
+
+ //***************************************************************************
+ // Initial delay after power-on
+ //***************************************************************************
+
+ // register the refresh flag from the controller.
+ // The refresh flag is in full frequency domain - so a pulsed version must
+ // be generated for half freq domain using 2 consecutive full clk cycles
+ // The registered version is used for the 200us counter
+ always @(posedge clk0)
+ ctrl_ref_flag_r <= ctrl_ref_flag;
+ always @(posedge clkdiv0)
+ cke_200us_cnt_en_r <= ctrl_ref_flag || ctrl_ref_flag_r;
+
+ // 200us counter for cke
+ always @(posedge clkdiv0)
+ if (rstdiv0) begin
+ // skip power-up count if only simulating
+ if (SIM_ONLY)
+ cke_200us_cnt_r <= 5'b00001;
+ else
+ cke_200us_cnt_r <= 5'd27;
+ end else if (cke_200us_cnt_en_r)
+ cke_200us_cnt_r <= cke_200us_cnt_r - 1;
+
+ always @(posedge clkdiv0)
+ if (rstdiv0)
+ done_200us_r <= 1'b0;
+ else if (!done_200us_r)
+ done_200us_r <= (cke_200us_cnt_r == 5'b00000);
+
+ // 200 clocks counter - count value : h'64 required for initialization
+ // Counts 100 divided by two clocks
+ always @(posedge clkdiv0)
+ if (rstdiv0 || (init_state_r == INIT_CNT_200))
+ cnt_200_cycle_r <= 8'h64;
+ else if (init_state_r == INIT_ZQCL) // ddr3
+ cnt_200_cycle_r <= 8'hC8;
+ else if (cnt_200_cycle_r != 8'h00)
+ cnt_200_cycle_r <= cnt_200_cycle_r - 1;
+
+ always @(posedge clkdiv0)
+ if (rstdiv0 || (init_state_r == INIT_CNT_200)
+ || (init_state_r == INIT_ZQCL))
+ cnt_200_cycle_done_r <= 1'b0;
+ else if (cnt_200_cycle_r == 8'h00)
+ cnt_200_cycle_done_r <= 1'b1;
+
+ //*****************************************************************
+ // handle deep memory configuration:
+ // During initialization: Repeat initialization sequence once for each
+ // chip select. Note that we could perform initalization for all chip
+ // selects simulataneously. Probably fine - any potential SI issues with
+ // auto refreshing all chip selects at once?
+ // Once initialization complete, assert only CS[0] for calibration.
+ //*****************************************************************
+
+ always @(posedge clkdiv0)
+ if (rstdiv0) begin
+ chip_cnt_r <= 2'b00;
+ end else if (init_state_r == INIT_DEEP_MEMORY_ST) begin
+ if (chip_cnt_r != CS_NUM)
+ chip_cnt_r <= chip_cnt_r + 1;
+ else
+ chip_cnt_r <= 2'b00;
+ end
+
+ always @(posedge clkdiv0)
+ if (rstdiv0) begin
+ ddr_cs_n_r <= {CS_NUM{1'b1}};
+ end else begin
+ ddr_cs_n_r <= {CS_NUM{1'b1}};
+ if ((init_state_r == INIT_DUMMY_ACTIVE) ||
+ (init_state_r == INIT_PRECHARGE) ||
+ (init_state_r == INIT_LOAD_MODE) ||
+ (init_state_r == INIT_AUTO_REFRESH) ||
+ (init_state_r == INIT_ZQCL ) ||
+ (((init_state_r == INIT_CAL1_READ) ||
+ (init_state_r == INIT_CAL2_READ) ||
+ (init_state_r == INIT_CAL3_READ) ||
+ (init_state_r == INIT_CAL4_READ) ||
+ (init_state_r == INIT_CAL1_WRITE) ||
+ (init_state_r == INIT_CAL2_WRITE) ||
+ (init_state_r == INIT_CAL3_WRITE)) && (burst_cnt_r == 2'b00)))
+ ddr_cs_n_r[chip_cnt_r] <= 1'b0;
+ else
+ ddr_cs_n_r[chip_cnt_r] <= 1'b1;
+ end
+
+ //***************************************************************************
+ // Write/read burst logic
+ //***************************************************************************
+
+ assign cal_write = ((init_state_r == INIT_CAL1_WRITE) ||
+ (init_state_r == INIT_CAL2_WRITE) ||
+ (init_state_r == INIT_CAL3_WRITE));
+ assign cal_read = ((init_state_r == INIT_CAL1_READ) ||
+ (init_state_r == INIT_CAL2_READ) ||
+ (init_state_r == INIT_CAL3_READ) ||
+ (init_state_r == INIT_CAL4_READ));
+ assign cal_write_read = ((init_state_r == INIT_CAL1_READ) ||
+ (init_state_r == INIT_CAL2_READ) ||
+ (init_state_r == INIT_CAL3_READ) ||
+ (init_state_r == INIT_CAL4_READ) ||
+ (init_state_r == INIT_CAL1_WRITE) ||
+ (init_state_r == INIT_CAL2_WRITE) ||
+ (init_state_r == INIT_CAL3_WRITE));
+
+ assign burst_val = (BURST_LEN == 4) ? 2'b00 :
+ (BURST_LEN == 8) ? 2'b01 : 2'b00;
+
+ // keep track of current address - need this if burst length < 8 for
+ // stage 2-4 calibration writes and reads. Make sure value always gets
+ // initialized to 0 before we enter write/read state. This is used to
+ // keep track of when another burst must be issued
+ always @(posedge clkdiv0)
+ if (cal_write_read)
+ burst_addr_r <= burst_addr_r + 2;
+ else
+ burst_addr_r <= 2'b00;
+
+ // write/read burst count
+ always @(posedge clkdiv0)
+ if (cal_write_read)
+ if (burst_cnt_r == 2'b00)
+ burst_cnt_r <= burst_val;
+ else // SHOULD THIS BE -2 CHECK THIS LOGIC
+ burst_cnt_r <= burst_cnt_r - 1;
+ else
+ burst_cnt_r <= 2'b00;
+
+ // indicate when a write is occurring
+ always @(posedge clkdiv0)
+ // MIG 2.1: Remove (burst_addr_r<4) term - not used
+ // phy_init_wren <= cal_write && (burst_addr_r < 3'd4);
+ phy_init_wren <= cal_write;
+
+ // used for read enable calibration, pulse to indicate when read issued
+ always @(posedge clkdiv0)
+ // MIG 2.1: Remove (burst_addr_r<4) term - not used
+ // phy_init_rden <= cal_read && (burst_addr_r < 3'd4);
+ phy_init_rden <= cal_read;
+
+ //***************************************************************************
+ // Initialization state machine
+ //***************************************************************************
+
+ always @(posedge clkdiv0)
+ // every time we need to initialize another rank of memory, need to
+ // reset init count, and repeat the entire initialization (but not
+ // calibration) sequence
+ if (rstdiv0 || (init_state_r == INIT_DEEP_MEMORY_ST))
+ init_cnt_r <= INIT_CNTR_INIT;
+ else if ((DDR_TYPE == DDR1) && (init_state_r == INIT_PRECHARGE) &&
+ (init_cnt_r == INIT_CNTR_PRECH_1))
+ // skip EMR(2) and EMR(3) register loads
+ init_cnt_r <= INIT_CNTR_EMR_EN_DLL;
+ else if ((DDR_TYPE == DDR1) && (init_state_r == INIT_LOAD_MODE) &&
+ (init_cnt_r == INIT_CNTR_MR_ACT_DLL))
+ // skip OCD calibration for DDR1
+ init_cnt_r <= INIT_CNTR_DEEP_MEM;
+ else if ((DDR_TYPE == DDR3) && (init_state_r == INIT_ZQCL))
+ // skip states for DDR3
+ init_cnt_r <= INIT_CNTR_DEEP_MEM;
+ else if ((init_state_r == INIT_LOAD_MODE) ||
+ ((init_state_r == INIT_PRECHARGE)
+ && (init_state_r1 != INIT_CALIB_REF))||
+ ((init_state_r == INIT_AUTO_REFRESH)
+ && (~init_done_r))||
+ (init_state_r == INIT_CNT_200))
+ init_cnt_r <= init_cnt_r + 1;
+
+ always @(posedge clkdiv0) begin
+ if ((init_state_r == INIT_IDLE) && (init_cnt_r == INIT_CNTR_DONE)) begin
+ phy_init_done_r <= 1'b1;
+ end else
+ phy_init_done_r <= 1'b0;
+ end
+
+ // phy_init_done to the controller and the user interface.
+ // It is delayed by four clocks to account for the
+ // multi cycle path constraint to the (phy_init_data_sel)
+ // to the phy layer.
+ always @(posedge clkdiv0)begin
+ if (rstdiv0) begin
+ phy_init_done_r1 <= 1'b0;
+ phy_init_done_r2 <= 1'b0;
+ phy_init_done_r3 <= 1'b0;
+ phy_init_done <= 1'b0;
+ end else begin
+ phy_init_done_r1 <= phy_init_done_r;
+ phy_init_done_r2 <= phy_init_done_r1;
+ phy_init_done_r3 <= phy_init_done_r2;
+ phy_init_done <= phy_init_done_r3;
+ end
+ end
+
+ // Instantiate primitive to allow this flop to be attached to multicycle
+ // path constraint in UCF. This signal goes to PHY_WRITE and PHY_CTL_IO
+ // datapath logic only. Because it is a multi-cycle path, it can be
+ // clocked by either CLKDIV0 or CLK0.
+ FDRSE u_ff_phy_init_data_sel
+ (
+ .Q (phy_init_data_sel),
+ .C (clkdiv0),
+ .CE (1'b1),
+ .D (phy_init_done_r1),
+ .R (1'b0),
+ .S (1'b0)
+ ) /* synthesis syn_preserve=1 */
+ /* synthesis syn_replicate = 0 */;
+
+ //synthesis translate_off
+ always @(posedge calib_done[0])
+ $display ("First Stage Calibration completed at time %t", $time);
+
+ always @(posedge calib_done[1])
+ $display ("Second Stage Calibration completed at time %t", $time);
+
+ always @(posedge calib_done[2]) begin
+ $display ("Third Stage Calibration completed at time %t", $time);
+ end
+
+ always @(posedge calib_done[3]) begin
+ $display ("Fourth Stage Calibration completed at time %t", $time);
+ $display ("Calibration completed at time %t", $time);
+ end
+ //synthesis translate_on
+
+ always @(posedge clkdiv0) begin
+ if ((init_cnt_r >= INIT_CNTR_DEEP_MEM))begin
+ init_done_r <= 1'b1;
+ end else
+ init_done_r <= 1'b0;
+ end
+
+ //*****************************************************************
+
+ always @(posedge clkdiv0)
+ if (rstdiv0) begin
+ init_state_r <= INIT_IDLE;
+ init_state_r1 <= INIT_IDLE;
+ init_state_r2 <= INIT_IDLE;
+ calib_done_r <= 4'b0000;
+ end else begin
+ init_state_r <= init_next_state;
+ init_state_r1 <= init_state_r;
+ init_state_r2 <= init_state_r1;
+ calib_done_r <= calib_done; // register for timing
+ end
+
+ always @(*) begin
+ init_next_state = init_state_r;
+ (* full_case, parallel_case *) case (init_state_r)
+ INIT_IDLE: begin
+ if (done_200us_r) begin
+ (* parallel_case *) case (init_cnt_r)
+ INIT_CNTR_INIT:
+ init_next_state = INIT_CNT_200;
+ INIT_CNTR_PRECH_1:
+ init_next_state = INIT_PRECHARGE;
+ INIT_CNTR_EMR2_INIT:
+ init_next_state = INIT_LOAD_MODE; // EMR(2)
+ INIT_CNTR_EMR3_INIT:
+ init_next_state = INIT_LOAD_MODE; // EMR(3);
+ INIT_CNTR_EMR_EN_DLL:
+ init_next_state = INIT_LOAD_MODE; // EMR, enable DLL
+ INIT_CNTR_MR_RST_DLL:
+ init_next_state = INIT_LOAD_MODE; // MR, reset DLL
+ INIT_CNTR_CNT_200_WAIT:begin
+ if(DDR_TYPE == DDR3)
+ init_next_state = INIT_ZQCL; // DDR3
+ else
+ // Wait 200cc after reset DLL
+ init_next_state = INIT_CNT_200;
+ end
+ INIT_CNTR_PRECH_2:
+ init_next_state = INIT_PRECHARGE;
+ INIT_CNTR_AR_1:
+ init_next_state = INIT_AUTO_REFRESH;
+ INIT_CNTR_AR_2:
+ init_next_state = INIT_AUTO_REFRESH;
+ INIT_CNTR_MR_ACT_DLL:
+ init_next_state = INIT_LOAD_MODE; // MR, unreset DLL
+ INIT_CNTR_EMR_DEF_OCD:
+ init_next_state = INIT_LOAD_MODE; // EMR, OCD default
+ INIT_CNTR_EMR_EXIT_OCD:
+ init_next_state = INIT_LOAD_MODE; // EMR, enable OCD exit
+ INIT_CNTR_DEEP_MEM: begin
+ if ((chip_cnt_r < CS_NUM-1))
+ init_next_state = INIT_DEEP_MEMORY_ST;
+ else if (cnt_200_cycle_done_r)
+ init_next_state = INIT_DUMMY_ACTIVE;
+ else
+ init_next_state = INIT_IDLE;
+ end
+ INIT_CNTR_PRECH_3:
+ init_next_state = INIT_PRECHARGE;
+ INIT_CNTR_DONE:
+ init_next_state = INIT_IDLE;
+ default :
+ init_next_state = INIT_IDLE;
+ endcase
+ end
+ end
+ INIT_CNT_200:
+ init_next_state = INIT_CNT_200_WAIT;
+ INIT_CNT_200_WAIT:
+ if (cnt_200_cycle_done_r)
+ init_next_state = INIT_IDLE;
+ INIT_PRECHARGE:
+ init_next_state = INIT_PRECHARGE_WAIT;
+ INIT_PRECHARGE_WAIT:
+ if (cnt_cmd_ok_r)begin
+ if (init_done_r && (!(&calib_done_r)))
+ init_next_state = INIT_AUTO_REFRESH;
+ else
+ init_next_state = INIT_IDLE;
+ end
+ INIT_ZQCL:
+ init_next_state = INIT_WAIT_DLLK_ZQINIT;
+ INIT_WAIT_DLLK_ZQINIT:
+ if (cnt_200_cycle_done_r)
+ init_next_state = INIT_IDLE;
+ INIT_LOAD_MODE:
+ init_next_state = INIT_MODE_REGISTER_WAIT;
+ INIT_MODE_REGISTER_WAIT:
+ if (cnt_cmd_ok_r)
+ init_next_state = INIT_IDLE;
+ INIT_AUTO_REFRESH:
+ init_next_state = INIT_AUTO_REFRESH_WAIT;
+ INIT_AUTO_REFRESH_WAIT:
+ if (cnt_cmd_ok_r)begin
+ if(init_done_r)
+ init_next_state = INIT_DUMMY_ACTIVE;
+ else
+ init_next_state = INIT_IDLE;
+ end
+ INIT_DEEP_MEMORY_ST:
+ init_next_state = INIT_IDLE;
+ // single row activate. All subsequent calibration writes and
+ // read will take place in this row
+ INIT_DUMMY_ACTIVE:
+ init_next_state = INIT_DUMMY_ACTIVE_WAIT;
+ INIT_DUMMY_ACTIVE_WAIT:
+ if (cnt_cmd_ok_r)begin
+ if (~calib_done_r[0]) begin
+ // if returning to stg1 after refresh, don't need to write
+ if (cal1_started_r)
+ init_next_state = INIT_CAL1_READ;
+ // if first entering stg1, need to write training pattern
+ else
+ init_next_state = INIT_CAL1_WRITE;
+ end else if (~calib_done[1]) begin
+ if (cal2_started_r)
+ init_next_state = INIT_CAL2_READ;
+ else
+ init_next_state = INIT_CAL2_WRITE;
+ end else if (~calib_done_r[2])
+ init_next_state = INIT_CAL3_WRITE;
+ else
+ init_next_state = INIT_CAL4_READ;
+ end
+ // Stage 1 calibration (write and continuous read)
+ INIT_CAL1_WRITE:
+ if (burst_addr_r == 2'b10)
+ init_next_state = INIT_CAL1_WRITE_READ;
+ INIT_CAL1_WRITE_READ:
+ if (cnt_cmd_ok_r)
+ init_next_state = INIT_CAL1_READ;
+ INIT_CAL1_READ:
+ // Stage 1 requires inter-stage auto-refresh
+ if (calib_done_r[0] || refresh_req)
+ init_next_state = INIT_CAL1_READ_WAIT;
+ INIT_CAL1_READ_WAIT:
+ if (cnt_cmd_ok_r)
+ init_next_state = INIT_CALIB_REF;
+ // Stage 2 calibration (write and continuous read)
+ INIT_CAL2_WRITE:
+ if (burst_addr_r == 2'b10)
+ init_next_state = INIT_CAL2_WRITE_READ;
+ INIT_CAL2_WRITE_READ:
+ if (cnt_cmd_ok_r)
+ init_next_state = INIT_CAL2_READ;
+ INIT_CAL2_READ:
+ // Stage 2 requires inter-stage auto-refresh
+ if (calib_done_r[1] || refresh_req)
+ init_next_state = INIT_CAL2_READ_WAIT;
+ INIT_CAL2_READ_WAIT:
+ if(cnt_cmd_ok_r)
+ init_next_state = INIT_CALIB_REF;
+ // Stage 3 calibration (write and continuous read)
+ INIT_CAL3_WRITE:
+ if (burst_addr_r == 2'b10)
+ init_next_state = INIT_CAL3_WRITE_READ;
+ INIT_CAL3_WRITE_READ:
+ if (cnt_cmd_ok_r)
+ init_next_state = INIT_CAL3_READ;
+ INIT_CAL3_READ:
+ if (burst_addr_r == 2'b10)
+ init_next_state = INIT_CAL3_READ_WAIT;
+ INIT_CAL3_READ_WAIT: begin
+ if (cnt_rd_ok_r)
+ if (calib_done_r[2]) begin
+ init_next_state = INIT_CALIB_REF;
+ end else
+ init_next_state = INIT_CAL3_READ;
+ end
+ // Stage 4 calibration (continuous read only, same pattern as stage 3)
+ // only used if DQS_GATE supported
+ INIT_CAL4_READ:
+ if (burst_addr_r == 2'b10)
+ init_next_state = INIT_CAL4_READ_WAIT;
+ INIT_CAL4_READ_WAIT: begin
+ if (cnt_rd_ok_r)
+ // Stage 4 requires inter-stage auto-refresh
+ if (calib_done_r[3] || refresh_req)
+ init_next_state = INIT_PRECHARGE;
+ else
+ init_next_state = INIT_CAL4_READ;
+ end
+ INIT_CALIB_REF:
+ init_next_state = INIT_PRECHARGE;
+ endcase
+ end
+
+ //***************************************************************************
+ // Memory control/address
+ //***************************************************************************
+
+ always @(posedge clkdiv0)
+ if ((init_state_r == INIT_DUMMY_ACTIVE) ||
+ (init_state_r == INIT_PRECHARGE) ||
+ (init_state_r == INIT_LOAD_MODE) ||
+ (init_state_r == INIT_AUTO_REFRESH)) begin
+ ddr_ras_n_r <= 1'b0;
+ end else begin
+ ddr_ras_n_r <= 1'b1;
+ end
+
+ always @(posedge clkdiv0)
+ if ((init_state_r == INIT_LOAD_MODE) ||
+ (init_state_r == INIT_AUTO_REFRESH) ||
+ (cal_write_read && (burst_cnt_r == 2'b00))) begin
+ ddr_cas_n_r <= 1'b0;
+ end else begin
+ ddr_cas_n_r <= 1'b1;
+ end
+
+ always @(posedge clkdiv0)
+ if ((init_state_r == INIT_LOAD_MODE) ||
+ (init_state_r == INIT_PRECHARGE) ||
+ (init_state_r == INIT_ZQCL) ||
+ (cal_write && (burst_cnt_r == 2'b00)))begin
+ ddr_we_n_r <= 1'b0;
+ end else begin
+ ddr_we_n_r <= 1'b1;
+ end
+
+ //*****************************************************************
+ // memory address during init
+ //*****************************************************************
+
+ always @(posedge clkdiv0) begin
+ if ((init_state_r == INIT_PRECHARGE)
+ || (init_state_r == INIT_ZQCL))begin
+ // Precharge all - set A10 = 1
+ ddr_addr_r <= {ROW_WIDTH{1'b0}};
+ ddr_addr_r[10] <= 1'b1;
+ ddr_ba_r <= {BANK_WIDTH{1'b0}};
+ end else if (init_state_r == INIT_LOAD_MODE) begin
+ ddr_ba_r <= {BANK_WIDTH{1'b0}};
+ ddr_addr_r <= {ROW_WIDTH{1'b0}};
+ case (init_cnt_r)
+ // EMR (2)
+ INIT_CNTR_EMR2_INIT: begin
+ ddr_ba_r[1:0] <= 2'b10;
+ ddr_addr_r <= {ROW_WIDTH{1'b0}};
+ end
+ // EMR (3)
+ INIT_CNTR_EMR3_INIT: begin
+ ddr_ba_r[1:0] <= 2'b11;
+ if(DDR_TYPE == DDR3)
+ ddr_addr_r <= load_mode_reg3[ROW_WIDTH-1:0];
+ else
+ ddr_addr_r <= {ROW_WIDTH{1'b0}};
+ end
+ // EMR write - A0 = 0 for DLL enable
+ INIT_CNTR_EMR_EN_DLL: begin
+ ddr_ba_r[1:0] <= 2'b01;
+ if(DDR_TYPE == DDR3)
+ ddr_addr_r <= load_mode_reg1[ROW_WIDTH-1:0];
+ else
+ ddr_addr_r <= ext_mode_reg[ROW_WIDTH-1:0];
+ end
+ // MR write, reset DLL (A8=1)
+ INIT_CNTR_MR_RST_DLL: begin
+ if(DDR_TYPE == DDR3)
+ ddr_addr_r <= load_mode_reg0[ROW_WIDTH-1:0];
+ else
+ ddr_addr_r <= load_mode_reg[ROW_WIDTH-1:0];
+ ddr_ba_r[1:0] <= 2'b00;
+ ddr_addr_r[8] <= 1'b1;
+ end
+ // MR write, unreset DLL (A8=0)
+ INIT_CNTR_MR_ACT_DLL: begin
+ ddr_ba_r[1:0] <= 2'b00;
+ ddr_addr_r <= load_mode_reg[ROW_WIDTH-1:0];
+ end
+ // EMR write, OCD default state
+ INIT_CNTR_EMR_DEF_OCD: begin
+ ddr_ba_r[1:0] <= 2'b01;
+ ddr_addr_r <= ext_mode_reg[ROW_WIDTH-1:0];
+ ddr_addr_r[9:7] <= 3'b111;
+ end
+ // EMR write - OCD exit
+ INIT_CNTR_EMR_EXIT_OCD: begin
+ ddr_ba_r[1:0] <= 2'b01;
+ ddr_addr_r <= ext_mode_reg[ROW_WIDTH-1:0];
+ end
+ default: begin
+ ddr_ba_r <= {BANK_WIDTH{1'bx}};
+ ddr_addr_r <= {ROW_WIDTH{1'bx}};
+ end
+ endcase
+ end else if (cal_write_read) begin
+ // when writing or reading for Stages 2-4, since training pattern is
+ // either 4 (stage 2) or 8 (stage 3-4) long, if BURST LEN < 8, then
+ // need to issue multiple bursts to read entire training pattern
+ ddr_addr_r[ROW_WIDTH-1:3] <= {ROW_WIDTH-4{1'b0}};
+ ddr_addr_r[2:0] <= {burst_addr_r, 1'b0};
+ ddr_ba_r <= {BANK_WIDTH-1{1'b0}};
+ end else if (init_state_r == INIT_DUMMY_ACTIVE) begin
+ // all calibration writing read takes place in row 0x0 only
+ ddr_ba_r <= {BANK_WIDTH{1'b0}};
+ ddr_addr_r <= {ROW_WIDTH{1'b0}};
+ end else begin
+ // otherwise, cry me a river
+ ddr_ba_r <= {BANK_WIDTH{1'bx}};
+ ddr_addr_r <= {ROW_WIDTH{1'bx}};
+ end
+ end
+
+ // Keep CKE asserted after initial power-on delay
+ always @(posedge clkdiv0)
+ ddr_cke_r <= {CKE_WIDTH{done_200us_r}};
+
+ // register commands to memory. Two clock cycle delay from state -> output
+ always @(posedge clk0) begin
+ ddr_addr_r1 <= ddr_addr_r;
+ ddr_ba_r1 <= ddr_ba_r;
+ ddr_cas_n_r1 <= ddr_cas_n_r;
+ ddr_ras_n_r1 <= ddr_ras_n_r;
+ ddr_we_n_r1 <= ddr_we_n_r;
+ ddr_cs_n_r1 <= ddr_cs_n_r;
+ end // always @ (posedge clk0)
+
+ // logic to toggle chip select. The chip_select is
+ // clocked of clkdiv0 and will be asserted for
+ // two clock cycles.
+ always @(posedge clk0) begin
+ if(rst0)
+ ddr_cs_disable_r <= {CS_NUM{1'b0}};
+ else begin
+ if(ddr_cs_disable_r[chip_cnt_r])
+ ddr_cs_disable_r[chip_cnt_r] <= 1'b0;
+ else begin
+ if(TWO_T_TIME_EN)
+ ddr_cs_disable_r[chip_cnt_r] <= ~ddr_cs_n_r1[chip_cnt_r];
+ else
+ ddr_cs_disable_r[chip_cnt_r] <= ~ddr_cs_n_r[chip_cnt_r];
+ end
+ end
+ end
+
+
+ assign phy_init_addr = ddr_addr_r;
+ assign phy_init_ba = ddr_ba_r;
+ assign phy_init_cas_n = ddr_cas_n_r;
+ assign phy_init_cke = ddr_cke_r;
+ assign phy_init_ras_n = ddr_ras_n_r;
+ assign phy_init_we_n = ddr_we_n_r;
+ assign phy_init_cs_n = (TWO_T_TIME_EN) ?
+ ddr_cs_n_r1 | ddr_cs_disable_r
+ : ddr_cs_n_r| ddr_cs_disable_r;
+
+endmodule
--- /dev/null
+//*****************************************************************************
+// DISCLAIMER OF LIABILITY
+//
+// This text/file contains proprietary, confidential
+// information of Xilinx, Inc., is distributed under license
+// from Xilinx, Inc., and may be used, copied and/or
+// disclosed only pursuant to the terms of a valid license
+// agreement with Xilinx, Inc. Xilinx hereby grants you a
+// license to use this text/file solely for design, simulation,
+// implementation and creation of design files limited
+// to Xilinx devices or technologies. Use with non-Xilinx
+// devices or technologies is expressly prohibited and
+// immediately terminates your license unless covered by
+// a separate agreement.
+//
+// Xilinx is providing this design, code, or information
+// "as-is" solely for use in developing programs and
+// solutions for Xilinx devices, with no obligation on the
+// part of Xilinx to provide support. By providing this design,
+// code, or information as one possible implementation of
+// this feature, application or standard, Xilinx is making no
+// representation that this implementation is free from any
+// claims of infringement. You are responsible for
+// obtaining any rights you may require for your implementation.
+// Xilinx expressly disclaims any warranty whatsoever with
+// respect to the adequacy of the implementation, including
+// but not limited to any warranties or representations that this
+// implementation is free from claims of infringement, implied
+// warranties of merchantability or fitness for a particular
+// purpose.
+//
+// Xilinx products are not intended for use in life support
+// appliances, devices, or systems. Use in such applications is
+// expressly prohibited.
+//
+// Any modifications that are made to the Source Code are
+// done at the user\92s sole risk and will be unsupported.
+//
+// Copyright (c) 2006-2007 Xilinx, Inc. All rights reserved.
+//
+// This copyright and support notice must be retained as part
+// of this text at all times.
+//*****************************************************************************
+// ____ ____
+// / /\/ /
+// /___/ \ / Vendor: Xilinx
+// \ \ \/ Version: 2.3
+// \ \ Application: MIG
+// / / Filename: ddr2_phy_io.v
+// /___/ /\ Date Last Modified: $Date: 2008/07/29 15:24:03 $
+// \ \ / \ Date Created: Wed Aug 16 2006
+// \___\/\___\
+//
+//Device: Virtex-5
+//Design Name: DDR2
+//Purpose:
+// This module instantiates calibration logic, data, data strobe and the
+// data mask iobs.
+//Reference:
+//Revision History:
+// Rev 1.1 - DM_IOB instance made based on USE_DM_PORT value . PK. 25/6/08
+//*****************************************************************************
+
+`timescale 1ns/1ps
+
+module ddr2_phy_io #
+ (
+ // Following parameters are for 72-bit RDIMM design (for ML561 Reference
+ // board design). Actual values may be different. Actual parameters values
+ // are passed from design top module ddr2_sdram module. Please refer to
+ // the ddr2_sdram module for actual values.
+ parameter CLK_WIDTH = 1,
+ parameter USE_DM_PORT = 1,
+ parameter DM_WIDTH = 9,
+ parameter DQ_WIDTH = 72,
+ parameter DQ_BITS = 7,
+ parameter DQ_PER_DQS = 8,
+ parameter DQS_BITS = 4,
+ parameter DQS_WIDTH = 9,
+ parameter HIGH_PERFORMANCE_MODE = "TRUE",
+ parameter ODT_WIDTH = 1,
+ parameter ADDITIVE_LAT = 0,
+ parameter CAS_LAT = 5,
+ parameter REG_ENABLE = 1,
+ parameter CLK_PERIOD = 3000,
+ parameter DDR_TYPE = 1,
+ parameter SIM_ONLY = 0,
+ parameter DEBUG_EN = 0,
+ parameter DQS_IO_COL = 0,
+ parameter DQ_IO_MS = 0
+ )
+ (
+ input clk0,
+ input clk90,
+ input clkdiv0,
+ input rst0,
+ input rst90,
+ input rstdiv0,
+ input dm_ce,
+ input [1:0] dq_oe_n,
+ input dqs_oe_n,
+ input dqs_rst_n,
+ input [3:0] calib_start,
+ input ctrl_rden,
+ input phy_init_rden,
+ input calib_ref_done,
+ output [3:0] calib_done,
+ output calib_ref_req,
+ output [DQS_WIDTH-1:0] calib_rden,
+ output [DQS_WIDTH-1:0] calib_rden_sel,
+ input [DQ_WIDTH-1:0] wr_data_rise,
+ input [DQ_WIDTH-1:0] wr_data_fall,
+ input [(DQ_WIDTH/8)-1:0] mask_data_rise,
+ input [(DQ_WIDTH/8)-1:0] mask_data_fall,
+ output [(DQ_WIDTH)-1:0] rd_data_rise,
+ output [(DQ_WIDTH)-1:0] rd_data_fall,
+ output [CLK_WIDTH-1:0] ddr_ck,
+ output [CLK_WIDTH-1:0] ddr_ck_n,
+ output [DM_WIDTH-1:0] ddr_dm,
+ inout [DQS_WIDTH-1:0] ddr_dqs,
+ inout [DQS_WIDTH-1:0] ddr_dqs_n,
+ inout [DQ_WIDTH-1:0] ddr_dq,
+ // Debug signals (optional use)
+ input dbg_idel_up_all,
+ input dbg_idel_down_all,
+ input dbg_idel_up_dq,
+ input dbg_idel_down_dq,
+ input dbg_idel_up_dqs,
+ input dbg_idel_down_dqs,
+ input dbg_idel_up_gate,
+ input dbg_idel_down_gate,
+ input [DQ_BITS-1:0] dbg_sel_idel_dq,
+ input dbg_sel_all_idel_dq,
+ input [DQS_BITS:0] dbg_sel_idel_dqs,
+ input dbg_sel_all_idel_dqs,
+ input [DQS_BITS:0] dbg_sel_idel_gate,
+ input dbg_sel_all_idel_gate,
+ output [3:0] dbg_calib_done,
+ output [3:0] dbg_calib_err,
+ output [(6*DQ_WIDTH)-1:0] dbg_calib_dq_tap_cnt,
+ output [(6*DQS_WIDTH)-1:0] dbg_calib_dqs_tap_cnt,
+ output [(6*DQS_WIDTH)-1:0] dbg_calib_gate_tap_cnt,
+ output [DQS_WIDTH-1:0] dbg_calib_rd_data_sel,
+ output [(5*DQS_WIDTH)-1:0] dbg_calib_rden_dly,
+ output [(5*DQS_WIDTH)-1:0] dbg_calib_gate_dly
+ );
+
+ // ratio of # of physical DM outputs to bytes in data bus
+ // may be different - e.g. if using x4 components
+ localparam DM_TO_BYTE_RATIO = DM_WIDTH / (DQ_WIDTH/8);
+
+ wire [CLK_WIDTH-1:0] ddr_ck_q;
+ wire [DQS_WIDTH-1:0] delayed_dqs;
+ wire [DQ_WIDTH-1:0] dlyce_dq;
+ wire [DQS_WIDTH-1:0] dlyce_dqs;
+ wire [DQS_WIDTH-1:0] dlyce_gate;
+ wire [DQ_WIDTH-1:0] dlyinc_dq;
+ wire [DQS_WIDTH-1:0] dlyinc_dqs;
+ wire [DQS_WIDTH-1:0] dlyinc_gate;
+ wire dlyrst_dq;
+ wire dlyrst_dqs;
+ wire [DQS_WIDTH-1:0] dlyrst_gate;
+ wire [DQS_WIDTH-1:0] dq_ce;
+ (* KEEP = "TRUE" *) wire [DQS_WIDTH-1:0] en_dqs /* synthesis syn_keep = 1 */;
+ wire [DQS_WIDTH-1:0] rd_data_sel;
+
+ //***************************************************************************
+
+ ddr2_phy_calib #
+ (
+ .DQ_WIDTH (DQ_WIDTH),
+ .DQ_BITS (DQ_BITS),
+ .DQ_PER_DQS (DQ_PER_DQS),
+ .DQS_BITS (DQS_BITS),
+ .DQS_WIDTH (DQS_WIDTH),
+ .ADDITIVE_LAT (ADDITIVE_LAT),
+ .CAS_LAT (CAS_LAT),
+ .REG_ENABLE (REG_ENABLE),
+ .CLK_PERIOD (CLK_PERIOD),
+ .SIM_ONLY (SIM_ONLY),
+ .DEBUG_EN (DEBUG_EN)
+ )
+ u_phy_calib
+ (
+ .clk (clk0),
+ .clkdiv (clkdiv0),
+ .rstdiv (rstdiv0),
+ .calib_start (calib_start),
+ .ctrl_rden (ctrl_rden),
+ .phy_init_rden (phy_init_rden),
+ .rd_data_rise (rd_data_rise),
+ .rd_data_fall (rd_data_fall),
+ .calib_ref_done (calib_ref_done),
+ .calib_done (calib_done),
+ .calib_ref_req (calib_ref_req),
+ .calib_rden (calib_rden),
+ .calib_rden_sel (calib_rden_sel),
+ .dlyrst_dq (dlyrst_dq),
+ .dlyce_dq (dlyce_dq),
+ .dlyinc_dq (dlyinc_dq),
+ .dlyrst_dqs (dlyrst_dqs),
+ .dlyce_dqs (dlyce_dqs),
+ .dlyinc_dqs (dlyinc_dqs),
+ .dlyrst_gate (dlyrst_gate),
+ .dlyce_gate (dlyce_gate),
+ .dlyinc_gate (dlyinc_gate),
+ .en_dqs (en_dqs),
+ .rd_data_sel (rd_data_sel),
+ .dbg_idel_up_all (dbg_idel_up_all),
+ .dbg_idel_down_all (dbg_idel_down_all),
+ .dbg_idel_up_dq (dbg_idel_up_dq),
+ .dbg_idel_down_dq (dbg_idel_down_dq),
+ .dbg_idel_up_dqs (dbg_idel_up_dqs),
+ .dbg_idel_down_dqs (dbg_idel_down_dqs),
+ .dbg_idel_up_gate (dbg_idel_up_gate),
+ .dbg_idel_down_gate (dbg_idel_down_gate),
+ .dbg_sel_idel_dq (dbg_sel_idel_dq),
+ .dbg_sel_all_idel_dq (dbg_sel_all_idel_dq),
+ .dbg_sel_idel_dqs (dbg_sel_idel_dqs),
+ .dbg_sel_all_idel_dqs (dbg_sel_all_idel_dqs),
+ .dbg_sel_idel_gate (dbg_sel_idel_gate),
+ .dbg_sel_all_idel_gate (dbg_sel_all_idel_gate),
+ .dbg_calib_done (dbg_calib_done),
+ .dbg_calib_err (dbg_calib_err),
+ .dbg_calib_dq_tap_cnt (dbg_calib_dq_tap_cnt),
+ .dbg_calib_dqs_tap_cnt (dbg_calib_dqs_tap_cnt),
+ .dbg_calib_gate_tap_cnt (dbg_calib_gate_tap_cnt),
+ .dbg_calib_rd_data_sel (dbg_calib_rd_data_sel),
+ .dbg_calib_rden_dly (dbg_calib_rden_dly),
+ .dbg_calib_gate_dly (dbg_calib_gate_dly)
+ );
+
+ //***************************************************************************
+ // Memory clock generation
+ //***************************************************************************
+
+ genvar ck_i;
+ generate
+ for(ck_i = 0; ck_i < CLK_WIDTH; ck_i = ck_i+1) begin: gen_ck
+ ODDR #
+ (
+ .SRTYPE ("SYNC"),
+ .DDR_CLK_EDGE ("OPPOSITE_EDGE")
+ )
+ u_oddr_ck_i
+ (
+ .Q (ddr_ck_q[ck_i]),
+ .C (clk0),
+ .CE (1'b1),
+ .D1 (1'b0),
+ .D2 (1'b1),
+ .R (1'b0),
+ .S (1'b0)
+ );
+ // Can insert ODELAY here if required
+ OBUFDS u_obuf_ck_i
+ (
+ .I (ddr_ck_q[ck_i]),
+ .O (ddr_ck[ck_i]),
+ .OB (ddr_ck_n[ck_i])
+ );
+ end
+ endgenerate
+
+ //***************************************************************************
+ // DQS instances
+ //***************************************************************************
+
+ genvar dqs_i;
+ generate
+ for(dqs_i = 0; dqs_i < DQS_WIDTH; dqs_i = dqs_i+1) begin: gen_dqs
+ ddr2_phy_dqs_iob #
+ (
+ .DDR_TYPE (DDR_TYPE),
+ .HIGH_PERFORMANCE_MODE (HIGH_PERFORMANCE_MODE)
+ )
+ u_iob_dqs
+ (
+ .clk0 (clk0),
+ .clkdiv0 (clkdiv0),
+ .rst0 (rst0),
+ .dlyinc_dqs (dlyinc_dqs[dqs_i]),
+ .dlyce_dqs (dlyce_dqs[dqs_i]),
+ .dlyrst_dqs (dlyrst_dqs),
+ .dlyinc_gate (dlyinc_gate[dqs_i]),
+ .dlyce_gate (dlyce_gate[dqs_i]),
+ .dlyrst_gate (dlyrst_gate[dqs_i]),
+ .dqs_oe_n (dqs_oe_n),
+ .dqs_rst_n (dqs_rst_n),
+ .en_dqs (en_dqs[dqs_i]),
+ .ddr_dqs (ddr_dqs[dqs_i]),
+ .ddr_dqs_n (ddr_dqs_n[dqs_i]),
+ .dq_ce (dq_ce[dqs_i]),
+ .delayed_dqs (delayed_dqs[dqs_i])
+ );
+ end
+ endgenerate
+
+ //***************************************************************************
+ // DM instances
+ //***************************************************************************
+
+ genvar dm_i;
+ generate
+ if (USE_DM_PORT) begin: gen_dm_inst
+ for(dm_i = 0; dm_i < DM_WIDTH; dm_i = dm_i+1) begin: gen_dm
+ ddr2_phy_dm_iob u_iob_dm
+ (
+ .clk90 (clk90),
+ .dm_ce (dm_ce),
+ .mask_data_rise (mask_data_rise[dm_i/DM_TO_BYTE_RATIO]),
+ .mask_data_fall (mask_data_fall[dm_i/DM_TO_BYTE_RATIO]),
+ .ddr_dm (ddr_dm[dm_i])
+ );
+ end
+ end
+ endgenerate
+
+ //***************************************************************************
+ // DQ IOB instances
+ //***************************************************************************
+
+ genvar dq_i;
+ generate
+ for(dq_i = 0; dq_i < DQ_WIDTH; dq_i = dq_i+1) begin: gen_dq
+ ddr2_phy_dq_iob #
+ (
+ .DQ_COL (DQS_IO_COL[2*(dq_i/DQ_PER_DQS)+1:2*(dq_i/DQ_PER_DQS)]),
+ .DQ_MS (DQ_IO_MS[dq_i]),
+ .HIGH_PERFORMANCE_MODE (HIGH_PERFORMANCE_MODE)
+ )
+ u_iob_dq
+ (
+ .clk0 (clk0),
+ .clk90 (clk90),
+ .clkdiv0 (clkdiv0),
+ .rst90 (rst90),
+ .dlyinc (dlyinc_dq[dq_i]),
+ .dlyce (dlyce_dq[dq_i]),
+ .dlyrst (dlyrst_dq),
+ .dq_oe_n (dq_oe_n),
+ .dqs (delayed_dqs[dq_i/DQ_PER_DQS]),
+ .ce (dq_ce[dq_i/DQ_PER_DQS]),
+ .rd_data_sel (rd_data_sel[dq_i/DQ_PER_DQS]),
+ .wr_data_rise (wr_data_rise[dq_i]),
+ .wr_data_fall (wr_data_fall[dq_i]),
+ .rd_data_rise (rd_data_rise[dq_i]),
+ .rd_data_fall (rd_data_fall[dq_i]),
+ .ddr_dq (ddr_dq[dq_i])
+ );
+ end
+ endgenerate
+
+endmodule
--- /dev/null
+//*****************************************************************************
+// DISCLAIMER OF LIABILITY
+//
+// This text/file contains proprietary, confidential
+// information of Xilinx, Inc., is distributed under license
+// from Xilinx, Inc., and may be used, copied and/or
+// disclosed only pursuant to the terms of a valid license
+// agreement with Xilinx, Inc. Xilinx hereby grants you a
+// license to use this text/file solely for design, simulation,
+// implementation and creation of design files limited
+// to Xilinx devices or technologies. Use with non-Xilinx
+// devices or technologies is expressly prohibited and
+// immediately terminates your license unless covered by
+// a separate agreement.
+//
+// Xilinx is providing this design, code, or information
+// "as-is" solely for use in developing programs and
+// solutions for Xilinx devices, with no obligation on the
+// part of Xilinx to provide support. By providing this design,
+// code, or information as one possible implementation of
+// this feature, application or standard, Xilinx is making no
+// representation that this implementation is free from any
+// claims of infringement. You are responsible for
+// obtaining any rights you may require for your implementation.
+// Xilinx expressly disclaims any warranty whatsoever with
+// respect to the adequacy of the implementation, including
+// but not limited to any warranties or representations that this
+// implementation is free from claims of infringement, implied
+// warranties of merchantability or fitness for a particular
+// purpose.
+//
+// Xilinx products are not intended for use in life support
+// appliances, devices, or systems. Use in such applications is
+// expressly prohibited.
+//
+// Any modifications that are made to the Source Code are
+// done at the user\92s sole risk and will be unsupported.
+//
+// Copyright (c) 2006-2007 Xilinx, Inc. All rights reserved.
+//
+// This copyright and support notice must be retained as part
+// of this text at all times.
+//*****************************************************************************
+// ____ ____
+// / /\/ /
+// /___/ \ / Vendor: Xilinx
+// \ \ \/ Version: 2.3
+// \ \ Application: MIG
+// / / Filename: ddr2_phy_top.v
+// /___/ /\ Date Last Modified: $Date: 2008/07/22 15:41:06 $
+// \ \ / \ Date Created: Wed Aug 16 2006
+// \___\/\___\
+//
+//Device: Virtex-5
+//Design Name: DDR2
+//Purpose:
+// Top-level for memory physical layer (PHY) interface
+//Reference:
+//Revision History:
+//*****************************************************************************
+
+`timescale 1ns/1ps
+
+(* X_CORE_INFO = "mig_v2_3_ddr2_v5, Coregen 10.1.02" , CORE_GENERATION_INFO = "ddr2_v5,mig_v2_3,{component_name=ddr2_phy_top, BANK_WIDTH=2, CKE_WIDTH=1, CLK_WIDTH=2, COL_WIDTH=10, CS_NUM=1, CS_WIDTH=1, DM_WIDTH=8, DQ_WIDTH=64, DQ_PER_DQS=8, DQS_WIDTH=8, ODT_WIDTH=1, ROW_WIDTH=13, ADDITIVE_LAT=0, BURST_LEN=4, BURST_TYPE=0, CAS_LAT=4, ECC_ENABLE=0, MULTI_BANK_EN=1, TWO_T_TIME_EN=1, ODT_TYPE=1, REDUCE_DRV=0, REG_ENABLE=0, TREFI_NS=7800, TRAS=40000, TRCD=15000, TRFC=105000, TRP=15000, TRTP=7500, TWR=15000, TWTR=7500, DDR2_CLK_PERIOD=3750, RST_ACT_LOW=1}" *)
+module ddr2_phy_top #
+ (
+ // Following parameters are for 72-bit RDIMM design (for ML561 Reference
+ // board design). Actual values may be different. Actual parameters values
+ // are passed from design top module ddr2_sdram module. Please refer to
+ // the ddr2_sdram module for actual values.
+ parameter BANK_WIDTH = 2,
+ parameter CLK_WIDTH = 1,
+ parameter CKE_WIDTH = 1,
+ parameter COL_WIDTH = 10,
+ parameter CS_NUM = 1,
+ parameter CS_WIDTH = 1,
+ parameter USE_DM_PORT = 1,
+ parameter DM_WIDTH = 9,
+ parameter DQ_WIDTH = 72,
+ parameter DQ_BITS = 7,
+ parameter DQ_PER_DQS = 8,
+ parameter DQS_WIDTH = 9,
+ parameter DQS_BITS = 4,
+ parameter HIGH_PERFORMANCE_MODE = "TRUE",
+ parameter ODT_WIDTH = 1,
+ parameter ROW_WIDTH = 14,
+ parameter ADDITIVE_LAT = 0,
+ parameter TWO_T_TIME_EN = 0,
+ parameter BURST_LEN = 4,
+ parameter BURST_TYPE = 0,
+ parameter CAS_LAT = 5,
+ parameter TWR = 15000,
+ parameter ECC_ENABLE = 0,
+ parameter ODT_TYPE = 1,
+ parameter DDR_TYPE = 1,
+ parameter REDUCE_DRV = 0,
+ parameter REG_ENABLE = 1,
+ parameter CLK_PERIOD = 3000,
+ parameter SIM_ONLY = 0,
+ parameter DEBUG_EN = 0,
+ parameter DQS_IO_COL = 0,
+ parameter DQ_IO_MS = 0
+ )
+ (
+ input clk0,
+ input clk90,
+ input clkdiv0,
+ input rst0,
+ input rst90,
+ input rstdiv0,
+ input ctrl_wren,
+ input [ROW_WIDTH-1:0] ctrl_addr,
+ input [BANK_WIDTH-1:0] ctrl_ba,
+ input ctrl_ras_n,
+ input ctrl_cas_n,
+ input ctrl_we_n,
+ input [CS_NUM-1:0] ctrl_cs_n,
+ input ctrl_rden,
+ input ctrl_ref_flag,
+ input [(2*DQ_WIDTH)-1:0] wdf_data,
+ input [(2*DQ_WIDTH/8)-1:0] wdf_mask_data,
+ output wdf_rden,
+ output phy_init_done,
+ output [DQS_WIDTH-1:0] phy_calib_rden,
+ output [DQS_WIDTH-1:0] phy_calib_rden_sel,
+ output [DQ_WIDTH-1:0] rd_data_rise,
+ output [DQ_WIDTH-1:0] rd_data_fall,
+ output [CLK_WIDTH-1:0] ddr_ck,
+ output [CLK_WIDTH-1:0] ddr_ck_n,
+ output [ROW_WIDTH-1:0] ddr_addr,
+ output [BANK_WIDTH-1:0] ddr_ba,
+ output ddr_ras_n,
+ output ddr_cas_n,
+ output ddr_we_n,
+ output [CS_WIDTH-1:0] ddr_cs_n,
+ output [CKE_WIDTH-1:0] ddr_cke,
+ output [ODT_WIDTH-1:0] ddr_odt,
+ output [DM_WIDTH-1:0] ddr_dm,
+ inout [DQS_WIDTH-1:0] ddr_dqs,
+ inout [DQS_WIDTH-1:0] ddr_dqs_n,
+ inout [DQ_WIDTH-1:0] ddr_dq,
+ // Debug signals (optional use)
+ input dbg_idel_up_all,
+ input dbg_idel_down_all,
+ input dbg_idel_up_dq,
+ input dbg_idel_down_dq,
+ input dbg_idel_up_dqs,
+ input dbg_idel_down_dqs,
+ input dbg_idel_up_gate,
+ input dbg_idel_down_gate,
+ input [DQ_BITS-1:0] dbg_sel_idel_dq,
+ input dbg_sel_all_idel_dq,
+ input [DQS_BITS:0] dbg_sel_idel_dqs,
+ input dbg_sel_all_idel_dqs,
+ input [DQS_BITS:0] dbg_sel_idel_gate,
+ input dbg_sel_all_idel_gate,
+ output [3:0] dbg_calib_done,
+ output [3:0] dbg_calib_err,
+ output [(6*DQ_WIDTH)-1:0] dbg_calib_dq_tap_cnt,
+ output [(6*DQS_WIDTH)-1:0] dbg_calib_dqs_tap_cnt,
+ output [(6*DQS_WIDTH)-1:0] dbg_calib_gate_tap_cnt,
+ output [DQS_WIDTH-1:0] dbg_calib_rd_data_sel,
+ output [(5*DQS_WIDTH)-1:0] dbg_calib_rden_dly,
+ output [(5*DQS_WIDTH)-1:0] dbg_calib_gate_dly
+ );
+
+ wire [3:0] calib_done;
+ wire calib_ref_done;
+ wire calib_ref_req;
+ wire [3:0] calib_start;
+ wire dm_ce;
+ wire [1:0] dq_oe_n;
+ wire dqs_oe_n;
+ wire dqs_rst_n;
+ wire [(DQ_WIDTH/8)-1:0] mask_data_fall;
+ wire [(DQ_WIDTH/8)-1:0] mask_data_rise;
+ wire [CS_NUM-1:0] odt;
+ wire [ROW_WIDTH-1:0] phy_init_addr;
+ wire [BANK_WIDTH-1:0] phy_init_ba;
+ wire phy_init_cas_n;
+ wire [CKE_WIDTH-1:0] phy_init_cke;
+ wire [CS_NUM-1:0] phy_init_cs_n;
+ wire phy_init_data_sel;
+ wire phy_init_ras_n;
+ wire phy_init_rden;
+ wire phy_init_we_n;
+ wire phy_init_wren;
+ wire [DQ_WIDTH-1:0] wr_data_fall;
+ wire [DQ_WIDTH-1:0] wr_data_rise;
+
+ //***************************************************************************
+
+ ddr2_phy_write #
+ (
+ .DQ_WIDTH (DQ_WIDTH),
+ .CS_NUM (CS_NUM),
+ .ADDITIVE_LAT (ADDITIVE_LAT),
+ .CAS_LAT (CAS_LAT),
+ .ECC_ENABLE (ECC_ENABLE),
+ .ODT_TYPE (ODT_TYPE),
+ .REG_ENABLE (REG_ENABLE),
+ .DDR_TYPE (DDR_TYPE)
+ )
+ u_phy_write
+ (
+ .clk0 (clk0),
+ .clk90 (clk90),
+ .rst90 (rst90),
+ .wdf_data (wdf_data),
+ .wdf_mask_data (wdf_mask_data),
+ .ctrl_wren (ctrl_wren),
+ .phy_init_wren (phy_init_wren),
+ .phy_init_data_sel (phy_init_data_sel),
+ .dm_ce (dm_ce),
+ .dq_oe_n (dq_oe_n),
+ .dqs_oe_n (dqs_oe_n),
+ .dqs_rst_n (dqs_rst_n),
+ .wdf_rden (wdf_rden),
+ .odt (odt),
+ .wr_data_rise (wr_data_rise),
+ .wr_data_fall (wr_data_fall),
+ .mask_data_rise (mask_data_rise),
+ .mask_data_fall (mask_data_fall)
+ );
+
+ ddr2_phy_io #
+ (
+ .CLK_WIDTH (CLK_WIDTH),
+ .USE_DM_PORT (USE_DM_PORT),
+ .DM_WIDTH (DM_WIDTH),
+ .DQ_WIDTH (DQ_WIDTH),
+ .DQ_BITS (DQ_BITS),
+ .DQ_PER_DQS (DQ_PER_DQS),
+ .DQS_BITS (DQS_BITS),
+ .DQS_WIDTH (DQS_WIDTH),
+ .HIGH_PERFORMANCE_MODE (HIGH_PERFORMANCE_MODE),
+ .ODT_WIDTH (ODT_WIDTH),
+ .ADDITIVE_LAT (ADDITIVE_LAT),
+ .CAS_LAT (CAS_LAT),
+ .REG_ENABLE (REG_ENABLE),
+ .CLK_PERIOD (CLK_PERIOD),
+ .DDR_TYPE (DDR_TYPE),
+ .SIM_ONLY (SIM_ONLY),
+ .DEBUG_EN (DEBUG_EN),
+ .DQS_IO_COL (DQS_IO_COL),
+ .DQ_IO_MS (DQ_IO_MS)
+ )
+ u_phy_io
+ (
+ .clk0 (clk0),
+ .clk90 (clk90),
+ .clkdiv0 (clkdiv0),
+ .rst0 (rst0),
+ .rst90 (rst90),
+ .rstdiv0 (rstdiv0),
+ .dm_ce (dm_ce),
+ .dq_oe_n (dq_oe_n),
+ .dqs_oe_n (dqs_oe_n),
+ .dqs_rst_n (dqs_rst_n),
+ .calib_start (calib_start),
+ .ctrl_rden (ctrl_rden),
+ .phy_init_rden (phy_init_rden),
+ .calib_ref_done (calib_ref_done),
+ .calib_done (calib_done),
+ .calib_ref_req (calib_ref_req),
+ .calib_rden (phy_calib_rden),
+ .calib_rden_sel (phy_calib_rden_sel),
+ .wr_data_rise (wr_data_rise),
+ .wr_data_fall (wr_data_fall),
+ .mask_data_rise (mask_data_rise),
+ .mask_data_fall (mask_data_fall),
+ .rd_data_rise (rd_data_rise),
+ .rd_data_fall (rd_data_fall),
+ .ddr_ck (ddr_ck),
+ .ddr_ck_n (ddr_ck_n),
+ .ddr_dm (ddr_dm),
+ .ddr_dqs (ddr_dqs),
+ .ddr_dqs_n (ddr_dqs_n),
+ .ddr_dq (ddr_dq),
+ .dbg_idel_up_all (dbg_idel_up_all),
+ .dbg_idel_down_all (dbg_idel_down_all),
+ .dbg_idel_up_dq (dbg_idel_up_dq),
+ .dbg_idel_down_dq (dbg_idel_down_dq),
+ .dbg_idel_up_dqs (dbg_idel_up_dqs),
+ .dbg_idel_down_dqs (dbg_idel_down_dqs),
+ .dbg_idel_up_gate (dbg_idel_up_gate),
+ .dbg_idel_down_gate (dbg_idel_down_gate),
+ .dbg_sel_idel_dq (dbg_sel_idel_dq),
+ .dbg_sel_all_idel_dq (dbg_sel_all_idel_dq),
+ .dbg_sel_idel_dqs (dbg_sel_idel_dqs),
+ .dbg_sel_all_idel_dqs (dbg_sel_all_idel_dqs),
+ .dbg_sel_idel_gate (dbg_sel_idel_gate),
+ .dbg_sel_all_idel_gate (dbg_sel_all_idel_gate),
+ .dbg_calib_done (dbg_calib_done),
+ .dbg_calib_err (dbg_calib_err),
+ .dbg_calib_dq_tap_cnt (dbg_calib_dq_tap_cnt),
+ .dbg_calib_dqs_tap_cnt (dbg_calib_dqs_tap_cnt),
+ .dbg_calib_gate_tap_cnt (dbg_calib_gate_tap_cnt),
+ .dbg_calib_rd_data_sel (dbg_calib_rd_data_sel),
+ .dbg_calib_rden_dly (dbg_calib_rden_dly),
+ .dbg_calib_gate_dly (dbg_calib_gate_dly)
+ );
+
+ ddr2_phy_ctl_io #
+ (
+ .BANK_WIDTH (BANK_WIDTH),
+ .CKE_WIDTH (CKE_WIDTH),
+ .COL_WIDTH (COL_WIDTH),
+ .CS_NUM (CS_NUM),
+ .CS_WIDTH (CS_WIDTH),
+ .TWO_T_TIME_EN (TWO_T_TIME_EN),
+ .ODT_WIDTH (ODT_WIDTH),
+ .ROW_WIDTH (ROW_WIDTH),
+ .DDR_TYPE (DDR_TYPE)
+ )
+ u_phy_ctl_io
+ (
+ .clk0 (clk0),
+ .clk90 (clk90),
+ .rst0 (rst0),
+ .rst90 (rst90),
+ .ctrl_addr (ctrl_addr),
+ .ctrl_ba (ctrl_ba),
+ .ctrl_ras_n (ctrl_ras_n),
+ .ctrl_cas_n (ctrl_cas_n),
+ .ctrl_we_n (ctrl_we_n),
+ .ctrl_cs_n (ctrl_cs_n),
+ .phy_init_addr (phy_init_addr),
+ .phy_init_ba (phy_init_ba),
+ .phy_init_ras_n (phy_init_ras_n),
+ .phy_init_cas_n (phy_init_cas_n),
+ .phy_init_we_n (phy_init_we_n),
+ .phy_init_cs_n (phy_init_cs_n),
+ .phy_init_cke (phy_init_cke),
+ .phy_init_data_sel (phy_init_data_sel),
+ .odt (odt),
+ .ddr_addr (ddr_addr),
+ .ddr_ba (ddr_ba),
+ .ddr_ras_n (ddr_ras_n),
+ .ddr_cas_n (ddr_cas_n),
+ .ddr_we_n (ddr_we_n),
+ .ddr_cke (ddr_cke),
+ .ddr_cs_n (ddr_cs_n),
+ .ddr_odt (ddr_odt)
+ );
+
+ ddr2_phy_init #
+ (
+ .BANK_WIDTH (BANK_WIDTH),
+ .CKE_WIDTH (CKE_WIDTH),
+ .COL_WIDTH (COL_WIDTH),
+ .CS_NUM (CS_NUM),
+ .DQ_WIDTH (DQ_WIDTH),
+ .ODT_WIDTH (ODT_WIDTH),
+ .ROW_WIDTH (ROW_WIDTH),
+ .ADDITIVE_LAT (ADDITIVE_LAT),
+ .BURST_LEN (BURST_LEN),
+ .BURST_TYPE (BURST_TYPE),
+ .TWO_T_TIME_EN(TWO_T_TIME_EN),
+ .CAS_LAT (CAS_LAT),
+ .ODT_TYPE (ODT_TYPE),
+ .REDUCE_DRV (REDUCE_DRV),
+ .REG_ENABLE (REG_ENABLE),
+ .TWR (TWR),
+ .CLK_PERIOD (CLK_PERIOD),
+ .DDR_TYPE (DDR_TYPE),
+ .SIM_ONLY (SIM_ONLY)
+ )
+ u_phy_init
+ (
+ .clk0 (clk0),
+ .clkdiv0 (clkdiv0),
+ .rst0 (rst0),
+ .rstdiv0 (rstdiv0),
+ .calib_done (calib_done),
+ .ctrl_ref_flag (ctrl_ref_flag),
+ .calib_ref_req (calib_ref_req),
+ .calib_start (calib_start),
+ .calib_ref_done (calib_ref_done),
+ .phy_init_wren (phy_init_wren),
+ .phy_init_rden (phy_init_rden),
+ .phy_init_addr (phy_init_addr),
+ .phy_init_ba (phy_init_ba),
+ .phy_init_ras_n (phy_init_ras_n),
+ .phy_init_cas_n (phy_init_cas_n),
+ .phy_init_we_n (phy_init_we_n),
+ .phy_init_cs_n (phy_init_cs_n),
+ .phy_init_cke (phy_init_cke),
+ .phy_init_done (phy_init_done),
+ .phy_init_data_sel (phy_init_data_sel)
+ );
+
+endmodule
--- /dev/null
+//*****************************************************************************
+// DISCLAIMER OF LIABILITY
+//
+// This text/file contains proprietary, confidential
+// information of Xilinx, Inc., is distributed under license
+// from Xilinx, Inc., and may be used, copied and/or
+// disclosed only pursuant to the terms of a valid license
+// agreement with Xilinx, Inc. Xilinx hereby grants you a
+// license to use this text/file solely for design, simulation,
+// implementation and creation of design files limited
+// to Xilinx devices or technologies. Use with non-Xilinx
+// devices or technologies is expressly prohibited and
+// immediately terminates your license unless covered by
+// a separate agreement.
+//
+// Xilinx is providing this design, code, or information
+// "as-is" solely for use in developing programs and
+// solutions for Xilinx devices, with no obligation on the
+// part of Xilinx to provide support. By providing this design,
+// code, or information as one possible implementation of
+// this feature, application or standard, Xilinx is making no
+// representation that this implementation is free from any
+// claims of infringement. You are responsible for
+// obtaining any rights you may require for your implementation.
+// Xilinx expressly disclaims any warranty whatsoever with
+// respect to the adequacy of the implementation, including
+// but not limited to any warranties or representations that this
+// implementation is free from claims of infringement, implied
+// warranties of merchantability or fitness for a particular
+// purpose.
+//
+// Xilinx products are not intended for use in life support
+// appliances, devices, or systems. Use in such applications is
+// expressly prohibited.
+//
+// Any modifications that are made to the Source Code are
+// done at the user\92s sole risk and will be unsupported.
+//
+// Copyright (c) 2006-2007 Xilinx, Inc. All rights reserved.
+//
+// This copyright and support notice must be retained as part
+// of this text at all times.
+//*****************************************************************************
+// ____ ____
+// / /\/ /
+// /___/ \ / Vendor: Xilinx
+// \ \ \/ Version: 2.3
+// \ \ Application: MIG
+// / / Filename: ddr2_phy_write.v
+// /___/ /\ Date Last Modified: $Date: 2008/07/29 15:24:03 $
+// \ \ / \ Date Created: Thu Aug 24 2006
+// \___\/\___\
+//
+//Device: Virtex-5
+//Design Name: DDR2
+//Purpose:
+//Reference:
+// Handles delaying various write control signals appropriately depending
+// on CAS latency, additive latency, etc. Also splits the data and mask in
+// rise and fall buses.
+//Revision History:
+// Rev 1.1 - For Dual Rank parts support ODT logic corrected. PK. 08/05/08
+//*****************************************************************************
+
+`timescale 1ns/1ps
+
+module ddr2_phy_write #
+ (
+ // Following parameters are for 72-bit RDIMM design (for ML561 Reference
+ // board design). Actual values may be different. Actual parameters values
+ // are passed from design top module ddr2_sdram module. Please refer to
+ // the ddr2_sdram module for actual values.
+ parameter DQ_WIDTH = 72,
+ parameter CS_NUM = 1,
+ parameter ADDITIVE_LAT = 0,
+ parameter CAS_LAT = 5,
+ parameter ECC_ENABLE = 0,
+ parameter ODT_TYPE = 1,
+ parameter REG_ENABLE = 1,
+ parameter DDR_TYPE = 1
+ )
+ (
+ input clk0,
+ input clk90,
+ input rst90,
+ input [(2*DQ_WIDTH)-1:0] wdf_data,
+ input [(2*DQ_WIDTH/8)-1:0] wdf_mask_data,
+ input ctrl_wren,
+ input phy_init_wren,
+ input phy_init_data_sel,
+ output reg dm_ce,
+ output reg [1:0] dq_oe_n,
+ output reg dqs_oe_n ,
+ output reg dqs_rst_n ,
+ output wdf_rden,
+ output reg [CS_NUM-1:0] odt ,
+ output [DQ_WIDTH-1:0] wr_data_rise,
+ output [DQ_WIDTH-1:0] wr_data_fall,
+ output [(DQ_WIDTH/8)-1:0] mask_data_rise,
+ output [(DQ_WIDTH/8)-1:0] mask_data_fall
+ );
+
+ localparam MASK_WIDTH = DQ_WIDTH/8;
+ localparam DDR1 = 0;
+ localparam DDR2 = 1;
+ localparam DDR3 = 2;
+
+ // (MIN,MAX) value of WR_LATENCY for DDR1:
+ // REG_ENABLE = (0,1)
+ // ECC_ENABLE = (0,1)
+ // Write latency = 1
+ // Total: (1,3)
+ // (MIN,MAX) value of WR_LATENCY for DDR2:
+ // REG_ENABLE = (0,1)
+ // ECC_ENABLE = (0,1)
+ // Write latency = ADDITIVE_CAS + CAS_LAT - 1 = (0,4) + (3,5) - 1 = (2,8)
+ // ADDITIVE_LAT = (0,4) (JEDEC79-2B)
+ // CAS_LAT = (3,5) (JEDEC79-2B)
+ // Total: (2,10)
+ localparam WR_LATENCY = (DDR_TYPE == DDR3) ?
+ (ADDITIVE_LAT + (CAS_LAT) + REG_ENABLE ) :
+ (DDR_TYPE == DDR2) ?
+ (ADDITIVE_LAT + (CAS_LAT-1) + REG_ENABLE ) :
+ (1 + REG_ENABLE );
+
+ // NOTE that ODT timing does not need to be delayed for registered
+ // DIMM case, since like other control/address signals, it gets
+ // delayed by one clock cycle at the DIMM
+ localparam ODT_WR_LATENCY = WR_LATENCY - REG_ENABLE;
+
+ wire dm_ce_0;
+ reg dm_ce_r;
+ wire [1:0] dq_oe_0;
+ reg [1:0] dq_oe_n_90_r1;
+ reg [1:0] dq_oe_270;
+ wire dqs_oe_0;
+ reg dqs_oe_270;
+ reg dqs_oe_n_180_r1;
+ wire dqs_rst_0;
+ reg dqs_rst_n_180_r1;
+ reg dqs_rst_270;
+ reg ecc_dm_error_r;
+ reg ecc_dm_error_r1;
+ reg [(DQ_WIDTH-1):0] init_data_f;
+ reg [(DQ_WIDTH-1):0] init_data_r;
+ reg [3:0] init_wdf_cnt_r;
+ wire odt_0;
+ reg rst90_r /* synthesis syn_maxfan = 10 */;
+ reg [10:0] wr_stages ;
+ reg [(2*DQ_WIDTH)-1:0] wdf_data_r;
+ reg [(2*DQ_WIDTH/8)-1:0] wdf_mask_r;
+ wire [(2*DQ_WIDTH/8)-1:0] wdf_ecc_mask;
+
+ reg [(2*DQ_WIDTH/8)-1:0] wdf_mask_r1;
+ wire wdf_rden_0;
+ reg calib_rden_90_r;
+ reg wdf_rden_90_r;
+ reg wdf_rden_90_r1;
+ reg wdf_rden_270;
+
+ always @(posedge clk90)
+ rst90_r <= rst90;
+
+ //***************************************************************************
+ // Analysis of additional pipeline delays:
+ // 1. dq_oe (DQ 3-state): 1 CLK90 cyc in IOB 3-state FF
+ // 2. dqs_oe (DQS 3-state): 1 CLK180 cyc in IOB 3-state FF
+ // 3. dqs_rst (DQS output value reset): 1 CLK180 cyc in FF + 1 CLK180 cyc
+ // in IOB DDR
+ // 4. odt (ODT control): 1 CLK0 cyc in IOB FF
+ // 5. write data (output two cyc after wdf_rden - output of RAMB_FIFO w/
+ // output register enabled): 2 CLK90 cyc in OSERDES
+ //***************************************************************************
+
+ // DQS 3-state must be asserted one extra clock cycle due b/c of write
+ // pre- and post-amble (extra half clock cycle for each)
+ assign dqs_oe_0 = wr_stages[WR_LATENCY-1] | wr_stages[WR_LATENCY-2];
+
+ // same goes for ODT, need to handle both pre- and post-amble (generate
+ // ODT only for DDR2)
+ // ODT generation for DDR2 based on write latency. The MIN write
+ // latency is 2. Based on the write latency ODT is asserted.
+ generate
+ if ((DDR_TYPE != DDR1) && (ODT_TYPE > 0))begin: gen_odt_ddr2
+ if(ODT_WR_LATENCY > 2)
+ assign odt_0 =
+ wr_stages[ODT_WR_LATENCY-1] |
+ wr_stages[ODT_WR_LATENCY-2] |
+ wr_stages[ODT_WR_LATENCY-3] ;
+ else
+ assign odt_0 =
+ wr_stages[ODT_WR_LATENCY] |
+ wr_stages[ODT_WR_LATENCY-1] |
+ wr_stages[ODT_WR_LATENCY-2] ;
+ end else
+ assign odt_0 = 1'b0;
+ endgenerate
+
+ assign dq_oe_0[0] = wr_stages[WR_LATENCY-1] | wr_stages[WR_LATENCY];
+ assign dq_oe_0[1] = wr_stages[WR_LATENCY-1] | wr_stages[WR_LATENCY-2];
+ assign dqs_rst_0 = ~wr_stages[WR_LATENCY-2];
+ assign dm_ce_0 = wr_stages[WR_LATENCY] | wr_stages[WR_LATENCY-1]
+ | wr_stages[WR_LATENCY-2];
+
+ // write data fifo, read flag assertion
+ generate
+ if (DDR_TYPE != DDR1) begin: gen_wdf_ddr2
+ if (WR_LATENCY > 2)
+ assign wdf_rden_0 = wr_stages[WR_LATENCY-3];
+ else
+ assign wdf_rden_0 = wr_stages[WR_LATENCY-2];
+ end else begin: gen_wdf_ddr1
+ assign wdf_rden_0 = wr_stages[WR_LATENCY-2];
+ end
+ endgenerate
+
+ // first stage isn't registered
+ always @(*)
+ wr_stages[0] = (phy_init_data_sel) ? ctrl_wren : phy_init_wren;
+
+ always @(posedge clk0) begin
+ wr_stages[1] <= wr_stages[0];
+ wr_stages[2] <= wr_stages[1];
+ wr_stages[3] <= wr_stages[2];
+ wr_stages[4] <= wr_stages[3];
+ wr_stages[5] <= wr_stages[4];
+ wr_stages[6] <= wr_stages[5];
+ wr_stages[7] <= wr_stages[6];
+ wr_stages[8] <= wr_stages[7];
+ wr_stages[9] <= wr_stages[8];
+ wr_stages[10] <= wr_stages[9];
+ end
+
+ // intermediate synchronization to CLK270
+ always @(negedge clk90) begin
+ dq_oe_270 <= dq_oe_0;
+ dqs_oe_270 <= dqs_oe_0;
+ dqs_rst_270 <= dqs_rst_0;
+ wdf_rden_270 <= wdf_rden_0;
+ end
+
+ // synchronize DQS signals to CLK180
+ always @(negedge clk0) begin
+ dqs_oe_n_180_r1 <= ~dqs_oe_270;
+ dqs_rst_n_180_r1 <= ~dqs_rst_270;
+ end
+
+ // All write data-related signals synced to CLK90
+ always @(posedge clk90) begin
+ dq_oe_n_90_r1 <= ~dq_oe_270;
+ wdf_rden_90_r <= wdf_rden_270;
+ end
+
+ // generate for wdf_rden and calib rden. These signals
+ // are asserted based on write latency. For write
+ // latency of 2, the extra register stage is taken out.
+ generate
+ if (WR_LATENCY > 2) begin
+ always @(posedge clk90) begin
+ // assert wdf rden only for non calibration opertations
+ wdf_rden_90_r1 <= wdf_rden_90_r &
+ phy_init_data_sel;
+ // rden for calibration
+ calib_rden_90_r <= wdf_rden_90_r;
+ end
+ end else begin
+ always @(*) begin
+ wdf_rden_90_r1 = wdf_rden_90_r
+ & phy_init_data_sel;
+ calib_rden_90_r = wdf_rden_90_r;
+ end
+ end // else: !if(WR_LATENCY > 2)
+ endgenerate
+
+ // dm CE signal to stop dm oscilation
+ always @(negedge clk90)begin
+ dm_ce_r <= dm_ce_0;
+ dm_ce <= dm_ce_r;
+ end
+
+ // When in ECC mode the upper byte [71:64] will have the
+ // ECC parity. Mapping the bytes which have valid data
+ // to the upper byte in ecc mode. Also in ecc mode there
+ // is an extra register stage to account for timing.
+
+ genvar mask_i;
+ generate
+ if(ECC_ENABLE) begin
+ for (mask_i = 0; mask_i < (2*DQ_WIDTH)/72;
+ mask_i = mask_i+1) begin: gen_mask
+ assign wdf_ecc_mask[((mask_i*9)+9)-1:(mask_i*9)] =
+ {&wdf_mask_data[(mask_i*8)+(7+mask_i):mask_i*9],
+ wdf_mask_data[(mask_i*8)+(7+mask_i):mask_i*9]};
+ end
+ end
+ endgenerate
+
+ generate
+ if (ECC_ENABLE) begin:gen_ecc_reg
+ always @(posedge clk90)begin
+ if(phy_init_data_sel)
+ wdf_mask_r <= wdf_ecc_mask;
+ else
+ wdf_mask_r <= {(2*DQ_WIDTH/8){1'b0}};
+ end
+ end else begin
+ always@(posedge clk90) begin
+ if (phy_init_data_sel)
+ wdf_mask_r <= wdf_mask_data;
+ else
+ wdf_mask_r <= {(2*DQ_WIDTH/8){1'b0}};
+ end
+ end
+ endgenerate
+
+ always @(posedge clk90) begin
+ if(phy_init_data_sel)
+ wdf_data_r <= wdf_data;
+ else
+ wdf_data_r <={init_data_f,init_data_r};
+ end
+
+ // Error generation block during simulation.
+ // Error will be displayed when all the DM
+ // bits are not zero. The error will be
+ // displayed only during the start of the sequence
+ // for errors that are continous over many cycles.
+ generate
+ if (ECC_ENABLE) begin: gen_ecc_error
+ always @(posedge clk90) begin
+ //synthesis translate_off
+ wdf_mask_r1 <= wdf_mask_r;
+ if(DQ_WIDTH > 72)
+ ecc_dm_error_r
+ <= (
+ (~wdf_mask_r1[35] && (|wdf_mask_r1[34:27])) ||
+ (~wdf_mask_r1[26] && (|wdf_mask_r1[25:18])) ||
+ (~wdf_mask_r1[17] && (|wdf_mask_r1[16:9])) ||
+ (~wdf_mask_r1[8] && (|wdf_mask_r1[7:0]))) && phy_init_data_sel;
+ else
+ ecc_dm_error_r
+ <= ((~wdf_mask_r1[17] && (|wdf_mask_r1[16:9])) ||
+ (~wdf_mask_r1[8] && (|wdf_mask_r1[7:0]))) && phy_init_data_sel;
+ ecc_dm_error_r1 <= ecc_dm_error_r ;
+ if (ecc_dm_error_r && ~ecc_dm_error_r1) // assert the error only once.
+ $display ("ECC DM ERROR. ");
+ //synthesis translate_on
+ end
+ end
+ endgenerate
+
+ //***************************************************************************
+ // State logic to write calibration training patterns
+ //***************************************************************************
+
+ always @(posedge clk90) begin
+ if (rst90_r) begin
+ init_wdf_cnt_r <= 4'd0;
+ init_data_r <= {64{1'bx}};
+ init_data_f <= {64{1'bx}};
+ end else begin
+ init_wdf_cnt_r <= init_wdf_cnt_r + calib_rden_90_r;
+ casex (init_wdf_cnt_r)
+ // First stage calibration. Pattern (rise/fall) = 1(r)->0(f)
+ // The rise data and fall data are already interleaved in the manner
+ // required for data into the WDF write FIFO
+ 4'b00xx: begin
+ init_data_r <= {DQ_WIDTH{1'b1}};
+ init_data_f <= {DQ_WIDTH{1'b0}};
+ end
+ // Second stage calibration. Pattern = 1(r)->1(f)->0(r)->0(f)
+ 4'b01x0: begin
+ init_data_r <= {DQ_WIDTH{1'b1}};
+ init_data_f <= {DQ_WIDTH{1'b1}};
+ end
+ 4'b01x1: begin
+ init_data_r <= {DQ_WIDTH{1'b0}};
+ init_data_f <= {DQ_WIDTH{1'b0}};
+ end
+ // MIG 2.1: Changed Stage 3/4 training pattern
+ // Third and fourth stage calibration patern =
+ // 11(r)->ee(f)->ee(r)->11(f)-11(r)->ee(f)->ee(r)->11(f)
+ 4'b1000: begin
+ init_data_r <= {DQ_WIDTH/4{4'h1}};
+ init_data_f <= {DQ_WIDTH/4{4'hE}};
+ end
+ 4'b1001: begin
+ init_data_r <= {DQ_WIDTH/4{4'hE}};
+ init_data_f <= {DQ_WIDTH/4{4'h1}};
+ end
+ 4'b1010: begin
+ init_data_r <= {(DQ_WIDTH/4){4'h1}};
+ init_data_f <= {(DQ_WIDTH/4){4'hE}};
+ end
+ 4'b1011: begin
+ init_data_r <= {(DQ_WIDTH/4){4'hE}};
+ init_data_f <= {(DQ_WIDTH/4){4'h1}};
+ end
+ default: begin
+ init_data_f <= {(2*DQ_WIDTH){1'bx}};
+ init_data_r <= {(2*DQ_WIDTH){1'bx}};
+ end
+ endcase
+ end
+ end
+
+ //***************************************************************************
+
+ always @(posedge clk90)
+ dq_oe_n <= dq_oe_n_90_r1;
+
+ always @(negedge clk0)
+ dqs_oe_n <= dqs_oe_n_180_r1;
+
+ always @(negedge clk0)
+ dqs_rst_n <= dqs_rst_n_180_r1;
+
+ // generate for odt. odt is asserted based on
+ // write latency. For write latency of 2
+ // the extra register stage is taken out.
+ generate
+ if (ODT_WR_LATENCY > 2) begin
+ always @(posedge clk0) begin
+ odt <= 'b0;
+ odt[0] <= odt_0;
+ end
+ end else begin
+ always @ (*) begin
+ odt = 'b0;
+ odt[0] = odt_0;
+ end
+ end
+ endgenerate
+
+ assign wdf_rden = wdf_rden_90_r1;
+
+ //***************************************************************************
+ // Format write data/mask: Data is in format: {fall, rise}
+ //***************************************************************************
+
+ assign wr_data_rise = wdf_data_r[DQ_WIDTH-1:0];
+ assign wr_data_fall = wdf_data_r[(2*DQ_WIDTH)-1:DQ_WIDTH];
+ assign mask_data_rise = wdf_mask_r[MASK_WIDTH-1:0];
+ assign mask_data_fall = wdf_mask_r[(2*MASK_WIDTH)-1:MASK_WIDTH];
+
+endmodule
--- /dev/null
+//*****************************************************************************
+// DISCLAIMER OF LIABILITY
+//
+// This text/file contains proprietary, confidential
+// information of Xilinx, Inc., is distributed under license
+// from Xilinx, Inc., and may be used, copied and/or
+// disclosed only pursuant to the terms of a valid license
+// agreement with Xilinx, Inc. Xilinx hereby grants you a
+// license to use this text/file solely for design, simulation,
+// implementation and creation of design files limited
+// to Xilinx devices or technologies. Use with non-Xilinx
+// devices or technologies is expressly prohibited and
+// immediately terminates your license unless covered by
+// a separate agreement.
+//
+// Xilinx is providing this design, code, or information
+// "as-is" solely for use in developing programs and
+// solutions for Xilinx devices, with no obligation on the
+// part of Xilinx to provide support. By providing this design,
+// code, or information as one possible implementation of
+// this feature, application or standard, Xilinx is making no
+// representation that this implementation is free from any
+// claims of infringement. You are responsible for
+// obtaining any rights you may require for your implementation.
+// Xilinx expressly disclaims any warranty whatsoever with
+// respect to the adequacy of the implementation, including
+// but not limited to any warranties or representations that this
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+// warranties of merchantability or fitness for a particular
+// purpose.
+//
+// Xilinx products are not intended for use in life support
+// appliances, devices, or systems. Use in such applications is
+// expressly prohibited.
+//
+// Any modifications that are made to the Source Code are
+// done at the user\92s sole risk and will be unsupported.
+//
+// Copyright (c) 2006-2007 Xilinx, Inc. All rights reserved.
+//
+// This copyright and support notice must be retained as part
+// of this text at all times.
+//*****************************************************************************
+// ____ ____
+// / /\/ /
+// /___/ \ / Vendor: Xilinx
+// \ \ \/ Version: 2.3
+// \ \ Application: MIG
+// / / Filename: ddr2_sdram.v
+// /___/ /\ Date Last Modified: $Date: 2008/07/09 12:33:12 $
+// \ \ / \ Date Created: Wed Aug 16 2006
+// \___\/\___\
+//
+//Device: Virtex-5
+//Design Name: DDR2
+//Purpose:
+// Top-level module. Simple model for what the user might use
+// Typically, the user will only instantiate MEM_INTERFACE_TOP in their
+// code, and generate all backend logic (test bench) and all the other infrastructure logic
+// separately.
+// In addition to the memory controller, the module instantiates:
+// 1. Reset logic based on user clocks
+// 2. IDELAY control block
+//Reference:
+//Revision History:
+//*****************************************************************************
+
+`timescale 1ns/1ps
+
+(* X_CORE_INFO = "mig_v2_3_ddr2_sdram_v5, Coregen 10.1.02" , CORE_GENERATION_INFO = "ddr2_sdram_v5,mig_v2_3,{component_name=ddr2_sdram, BANK_WIDTH=2, CKE_WIDTH=1, CLK_WIDTH=2, COL_WIDTH=10, CS_NUM=1, CS_WIDTH=1, DM_WIDTH=8, DQ_WIDTH=64, DQ_PER_DQS=8, DQS_WIDTH=8, ODT_WIDTH=1, ROW_WIDTH=13, ADDITIVE_LAT=0, BURST_LEN=4, BURST_TYPE=0, CAS_LAT=4, ECC_ENABLE=0, MULTI_BANK_EN=1, TWO_T_TIME_EN=1, ODT_TYPE=1, REDUCE_DRV=0, REG_ENABLE=0, TREFI_NS=7800, TRAS=40000, TRCD=15000, TRFC=105000, TRP=15000, TRTP=7500, TWR=15000, TWTR=7500, DDR2_CLK_PERIOD=3750, RST_ACT_LOW=1}" *)
+module ddr2_sdram #
+ (
+ parameter BANK_WIDTH = 2,
+ // # of memory bank addr bits.
+ parameter CKE_WIDTH = 1,
+ // # of memory clock enable outputs.
+ parameter CLK_WIDTH = 2,
+ // # of clock outputs.
+ parameter COL_WIDTH = 10,
+ // # of memory column bits.
+ parameter CS_NUM = 1,
+ // # of separate memory chip selects.
+ parameter CS_WIDTH = 1,
+ // # of total memory chip selects.
+ parameter CS_BITS = 0,
+ // set to log2(CS_NUM) (rounded up).
+ parameter DM_WIDTH = 8,
+ // # of data mask bits.
+ parameter DQ_WIDTH = 64,
+ // # of data width.
+ parameter DQ_PER_DQS = 8,
+ // # of DQ data bits per strobe.
+ parameter DQS_WIDTH = 8,
+ // # of DQS strobes.
+ parameter DQ_BITS = 6,
+ // set to log2(DQS_WIDTH*DQ_PER_DQS).
+ parameter DQS_BITS = 3,
+ // set to log2(DQS_WIDTH).
+ parameter ODT_WIDTH = 1,
+ // # of memory on-die term enables.
+ parameter ROW_WIDTH = 13,
+ // # of memory row and # of addr bits.
+ parameter ADDITIVE_LAT = 0,
+ // additive write latency.
+ parameter BURST_LEN = 4,
+ // burst length (in double words).
+ parameter BURST_TYPE = 0,
+ // burst type (=0 seq; =1 interleaved).
+ parameter CAS_LAT = 4,
+ // CAS latency.
+ parameter ECC_ENABLE = 0,
+ // enable ECC (=1 enable).
+ parameter APPDATA_WIDTH = 128,
+ // # of usr read/write data bus bits.
+ parameter MULTI_BANK_EN = 1,
+ // Keeps multiple banks open. (= 1 enable).
+ parameter TWO_T_TIME_EN = 1,
+ // 2t timing for unbuffered dimms.
+ parameter ODT_TYPE = 1,
+ // ODT (=0(none),=1(75),=2(150),=3(50)).
+ parameter REDUCE_DRV = 0,
+ // reduced strength mem I/O (=1 yes).
+ parameter REG_ENABLE = 0,
+ // registered addr/ctrl (=1 yes).
+ parameter TREFI_NS = 7800,
+ // auto refresh interval (ns).
+ parameter TRAS = 40000,
+ // active->precharge delay.
+ parameter TRCD = 15000,
+ // active->read/write delay.
+ parameter TRFC = 105000,
+ // refresh->refresh, refresh->active delay.
+ parameter TRP = 15000,
+ // precharge->command delay.
+ parameter TRTP = 7500,
+ // read->precharge delay.
+ parameter TWR = 15000,
+ // used to determine write->precharge.
+ parameter TWTR = 7500,
+ // write->read delay.
+ parameter HIGH_PERFORMANCE_MODE = "TRUE",
+ // # = TRUE, the IODELAY performance mode is set
+ // to high.
+ // # = FALSE, the IODELAY performance mode is set
+ // to low.
+ parameter SIM_ONLY = 0,
+ // = 1 to skip SDRAM power up delay.
+ parameter DEBUG_EN = 0,
+ // Enable debug signals/controls.
+ // When this parameter is changed from 0 to 1,
+ // make sure to uncomment the coregen commands
+ // in ise_flow.bat or create_ise.bat files in
+ // par folder.
+ parameter CLK_PERIOD = 3750,
+ // Core/Memory clock period (in ps).
+ parameter DQS_IO_COL = 16'b0000000000000000,
+ // I/O column location of DQS groups
+ // (=0, left; =1 center, =2 right).
+ parameter DQ_IO_MS = 64'b01110101_00111101_00001111_00011110_00101110_11000011_11000001_10111100,
+ // Master/Slave location of DQ I/O (=0 slave).
+ parameter RST_ACT_LOW = 1,
+ // =1 for active low reset, =0 for active high.
+ parameter EN_SYN = "FALSE"
+ )
+ (
+ inout [DQ_WIDTH-1:0] ddr2_dq,
+ output [ROW_WIDTH-1:0] ddr2_a,
+ output [BANK_WIDTH-1:0] ddr2_ba,
+ output ddr2_ras_n,
+ output ddr2_cas_n,
+ output ddr2_we_n,
+ output [CS_WIDTH-1:0] ddr2_cs_n,
+ output [ODT_WIDTH-1:0] ddr2_odt,
+ output [CKE_WIDTH-1:0] ddr2_cke,
+ output [DM_WIDTH-1:0] ddr2_dm,
+ input sys_rst_n,
+ output phy_init_done,
+ input dcm_lock,
+ output rst0_tb,
+ input clk0,
+ output clk0_tb,
+ input clk90,
+ input clkdiv0,
+ input clk200,
+
+ //added by xtan & gdgib
+ input af_clk, //address fifo clk
+ input rb_clk, //read buffer clk
+ input wb_clk, //write buffer clk
+ input af_rst, //address fifo rst
+ input rb_rst, //read buffer rst
+ input wb_rst, //write buffer rst
+ output rb_full, //read buffer is full
+ //end of add
+
+ output app_wdf_afull,
+ output app_af_afull,
+ output rd_data_valid,
+ input app_wdf_wren,
+ input app_af_wren,
+ input [30:0] app_af_addr,
+ input [2:0] app_af_cmd,
+ output [(APPDATA_WIDTH)-1:0] rd_data_fifo_out,
+ input rd_data_rden,
+ output [1:0] rd_ecc_error,
+ input [(APPDATA_WIDTH)-1:0] app_wdf_data,
+ input [(APPDATA_WIDTH/8)-1:0] app_wdf_mask_data,
+ inout [DQS_WIDTH-1:0] ddr2_dqs,
+ inout [DQS_WIDTH-1:0] ddr2_dqs_n,
+ output [CLK_WIDTH-1:0] ddr2_ck,
+ output [CLK_WIDTH-1:0] ddr2_ck_n
+ );
+
+ /////////////////////////////////////////////////////////////////////////////
+ // The following parameter "IDELAYCTRL_NUM" indicates the number of
+ // IDELAYCTRLs that are LOCed for the design. The IDELAYCTRL LOCs are
+ // provided in the UCF file of par folder. MIG provides the parameter value
+ // and the LOCs in the UCF file based on the selected Data Read banks for
+ // the design. You must not alter this value unless it is needed. If you
+ // modify this value, you should make sure that the value of "IDELAYCTRL_NUM"
+ // and IDELAYCTRL LOCs in UCF file are same and are relavent to the Data Read
+ // banks used.
+ /////////////////////////////////////////////////////////////////////////////
+
+ localparam IDELAYCTRL_NUM = 3;
+
+
+
+
+
+ wire rst0;
+ wire rst90;
+ wire rstdiv0;
+ wire rst200;
+ wire idelay_ctrl_rdy;
+
+
+ //Debug signals
+
+
+ wire [3:0] dbg_calib_done;
+ wire [3:0] dbg_calib_err;
+ wire [(6*DQ_WIDTH)-1:0] dbg_calib_dq_tap_cnt;
+ wire [(6*DQS_WIDTH)-1:0] dbg_calib_dqs_tap_cnt;
+ wire [(6*DQS_WIDTH)-1:0] dbg_calib_gate_tap_cnt;
+ wire [DQS_WIDTH-1:0] dbg_calib_rd_data_sel;
+ wire [(5*DQS_WIDTH)-1:0] dbg_calib_rden_dly;
+ wire [(5*DQS_WIDTH)-1:0] dbg_calib_gate_dly;
+ wire dbg_idel_up_all;
+ wire dbg_idel_down_all;
+ wire dbg_idel_up_dq;
+ wire dbg_idel_down_dq;
+ wire dbg_idel_up_dqs;
+ wire dbg_idel_down_dqs;
+ wire dbg_idel_up_gate;
+ wire dbg_idel_down_gate;
+ wire [DQ_BITS-1:0] dbg_sel_idel_dq;
+ wire dbg_sel_all_idel_dq;
+ wire [DQS_BITS:0] dbg_sel_idel_dqs;
+ wire dbg_sel_all_idel_dqs;
+ wire [DQS_BITS:0] dbg_sel_idel_gate;
+ wire dbg_sel_all_idel_gate;
+
+
+ // Debug signals (optional use)
+
+ //***********************************
+ // PHY Debug Port demo
+ //***********************************
+ wire [35:0] cs_control0;
+ wire [35:0] cs_control1;
+ wire [35:0] cs_control2;
+ wire [35:0] cs_control3;
+ wire [191:0] vio0_in;
+ wire [95:0] vio1_in;
+ wire [99:0] vio2_in;
+ wire [31:0] vio3_out;
+
+
+
+ //***************************************************************************
+
+ assign rst0_tb = rst0;
+ assign clk0_tb = clk0;
+
+
+ ddr2_idelay_ctrl #
+ (
+ .IDELAYCTRL_NUM (IDELAYCTRL_NUM)
+ )
+ u_ddr2_idelay_ctrl
+ (
+ .rst200 (rst200),
+ .clk200 (clk200),
+ .idelay_ctrl_rdy (idelay_ctrl_rdy)
+ );
+
+ ddr2_infrastructure #
+ (
+ .RST_ACT_LOW (RST_ACT_LOW)
+ )
+u_ddr2_infrastructure
+ (
+ .sys_rst_n (sys_rst_n),
+ .dcm_lock (dcm_lock),
+ .rst0 (rst0),
+ .rst90 (rst90),
+ .rstdiv0 (rstdiv0),
+ .rst200 (rst200),
+ .clk0 (clk0),
+ .clk90 (clk90),
+ .clkdiv0 (clkdiv0),
+ .clk200 (clk200),
+ .idelay_ctrl_rdy (idelay_ctrl_rdy)
+ );
+
+ ddr2_top #
+ (
+ .BANK_WIDTH (BANK_WIDTH),
+ .CKE_WIDTH (CKE_WIDTH),
+ .CLK_WIDTH (CLK_WIDTH),
+ .COL_WIDTH (COL_WIDTH),
+ .CS_NUM (CS_NUM),
+ .CS_WIDTH (CS_WIDTH),
+ .CS_BITS (CS_BITS),
+ .DM_WIDTH (DM_WIDTH),
+ .DQ_WIDTH (DQ_WIDTH),
+ .DQ_PER_DQS (DQ_PER_DQS),
+ .DQS_WIDTH (DQS_WIDTH),
+ .DQ_BITS (DQ_BITS),
+ .DQS_BITS (DQS_BITS),
+ .ODT_WIDTH (ODT_WIDTH),
+ .ROW_WIDTH (ROW_WIDTH),
+ .ADDITIVE_LAT (ADDITIVE_LAT),
+ .BURST_LEN (BURST_LEN),
+ .BURST_TYPE (BURST_TYPE),
+ .CAS_LAT (CAS_LAT),
+ .ECC_ENABLE (ECC_ENABLE),
+ .APPDATA_WIDTH (APPDATA_WIDTH),
+ .MULTI_BANK_EN (MULTI_BANK_EN),
+ .TWO_T_TIME_EN (TWO_T_TIME_EN),
+ .ODT_TYPE (ODT_TYPE),
+ .REDUCE_DRV (REDUCE_DRV),
+ .REG_ENABLE (REG_ENABLE),
+ .TREFI_NS (TREFI_NS),
+ .TRAS (TRAS),
+ .TRCD (TRCD),
+ .TRFC (TRFC),
+ .TRP (TRP),
+ .TRTP (TRTP),
+ .TWR (TWR),
+ .TWTR (TWTR),
+ .HIGH_PERFORMANCE_MODE (HIGH_PERFORMANCE_MODE),
+ .SIM_ONLY (SIM_ONLY),
+ .DEBUG_EN (DEBUG_EN),
+ .CLK_PERIOD (CLK_PERIOD),
+ .DQS_IO_COL (DQS_IO_COL),
+ .DQ_IO_MS (DQ_IO_MS),
+ .USE_DM_PORT (1),
+ .EN_SYN (EN_SYN)
+ )
+u_ddr2_top_0
+(
+ .ddr2_dq (ddr2_dq),
+ .ddr2_a (ddr2_a),
+ .ddr2_ba (ddr2_ba),
+ .ddr2_ras_n (ddr2_ras_n),
+ .ddr2_cas_n (ddr2_cas_n),
+ .ddr2_we_n (ddr2_we_n),
+ .ddr2_cs_n (ddr2_cs_n),
+ .ddr2_odt (ddr2_odt),
+ .ddr2_cke (ddr2_cke),
+ .ddr2_dm (ddr2_dm),
+ .phy_init_done (phy_init_done),
+ .rst0 (rst0),
+ .rst90 (rst90),
+ .rstdiv0 (rstdiv0),
+ .clk0 (clk0),
+ .clk90 (clk90),
+ .clkdiv0 (clkdiv0),
+
+ //added by xtan & gdgib
+ .af_clk (af_clk),
+ .rb_clk (rb_clk),
+ .wb_clk (wb_clk),
+ .af_rst (af_rst),
+ .rb_rst (rb_rst),
+ .wb_rst (wb_rst),
+ .rb_full (rb_full),
+ //end of add
+
+ .app_wdf_afull (app_wdf_afull),
+ .app_af_afull (app_af_afull),
+ .rd_data_valid (rd_data_valid),
+ .rd_data_rden(rd_data_rden),
+ .app_wdf_wren (app_wdf_wren),
+ .app_af_wren (app_af_wren),
+ .app_af_addr (app_af_addr),
+ .app_af_cmd (app_af_cmd),
+ .rd_data_fifo_out (rd_data_fifo_out),
+ .app_wdf_data (app_wdf_data),
+ .app_wdf_mask_data (app_wdf_mask_data),
+ .ddr2_dqs (ddr2_dqs),
+ .ddr2_dqs_n (ddr2_dqs_n),
+ .ddr2_ck (ddr2_ck),
+ .rd_ecc_error (rd_ecc_error),
+ .ddr2_ck_n (ddr2_ck_n),
+
+ .dbg_calib_done (dbg_calib_done),
+ .dbg_calib_err (dbg_calib_err),
+ .dbg_calib_dq_tap_cnt (dbg_calib_dq_tap_cnt),
+ .dbg_calib_dqs_tap_cnt (dbg_calib_dqs_tap_cnt),
+ .dbg_calib_gate_tap_cnt (dbg_calib_gate_tap_cnt),
+ .dbg_calib_rd_data_sel (dbg_calib_rd_data_sel),
+ .dbg_calib_rden_dly (dbg_calib_rden_dly),
+ .dbg_calib_gate_dly (dbg_calib_gate_dly),
+ .dbg_idel_up_all (dbg_idel_up_all),
+ .dbg_idel_down_all (dbg_idel_down_all),
+ .dbg_idel_up_dq (dbg_idel_up_dq),
+ .dbg_idel_down_dq (dbg_idel_down_dq),
+ .dbg_idel_up_dqs (dbg_idel_up_dqs),
+ .dbg_idel_down_dqs (dbg_idel_down_dqs),
+ .dbg_idel_up_gate (dbg_idel_up_gate),
+ .dbg_idel_down_gate (dbg_idel_down_gate),
+ .dbg_sel_idel_dq (dbg_sel_idel_dq),
+ .dbg_sel_all_idel_dq (dbg_sel_all_idel_dq),
+ .dbg_sel_idel_dqs (dbg_sel_idel_dqs),
+ .dbg_sel_all_idel_dqs (dbg_sel_all_idel_dqs),
+ .dbg_sel_idel_gate (dbg_sel_idel_gate),
+ .dbg_sel_all_idel_gate (dbg_sel_all_idel_gate)
+ );
+
+
+ //*****************************************************************
+ // Hooks to prevent sim/syn compilation errors (mainly for VHDL - but
+ // keep it also in Verilog version of code) w/ floating inputs if
+ // DEBUG_EN = 0.
+ //*****************************************************************
+
+ generate
+ if (DEBUG_EN == 0) begin: gen_dbg_tie_off
+ assign dbg_idel_up_all = 'b0;
+ assign dbg_idel_down_all = 'b0;
+ assign dbg_idel_up_dq = 'b0;
+ assign dbg_idel_down_dq = 'b0;
+ assign dbg_idel_up_dqs = 'b0;
+ assign dbg_idel_down_dqs = 'b0;
+ assign dbg_idel_up_gate = 'b0;
+ assign dbg_idel_down_gate = 'b0;
+ assign dbg_sel_idel_dq = 'b0;
+ assign dbg_sel_all_idel_dq = 'b0;
+ assign dbg_sel_idel_dqs = 'b0;
+ assign dbg_sel_all_idel_dqs = 'b0;
+ assign dbg_sel_idel_gate = 'b0;
+ assign dbg_sel_all_idel_gate = 'b0;
+ end else begin: gen_dbg_enable
+
+ //*****************************************************************
+ // PHY Debug Port example - see MIG User's Guide, XAPP858 or
+ // Answer Record 29443
+ // This logic supports up to 32 DQ and 8 DQS I/O
+ // NOTES:
+ // 1. PHY Debug Port demo connects to 4 VIO modules:
+ // - 3 VIO modules with only asynchronous inputs
+ // * Monitor IDELAY taps for DQ, DQS, DQS Gate
+ // * Calibration status
+ // - 1 VIO module with synchronous outputs
+ // * Allow dynamic adjustment o f IDELAY taps
+ // 2. User may need to modify this code to incorporate other
+ // chipscope-related modules in their larger design (e.g.
+ // if they have other ILA/VIO modules, they will need to
+ // for example instantiate a larger ICON module). In addition
+ // user may want to instantiate more VIO modules to control
+ // IDELAY for more DQ, DQS than is shown here
+ //*****************************************************************
+
+ icon4 u_icon
+ (
+ .control0 (cs_control0),
+ .control1 (cs_control1),
+ .control2 (cs_control2),
+ .control3 (cs_control3)
+ );
+
+ //*****************************************************************
+ // VIO ASYNC input: Display current IDELAY setting for up to 32
+ // DQ taps (32x6) = 192
+ //*****************************************************************
+
+ vio_async_in192 u_vio0
+ (
+ .control (cs_control0),
+ .async_in (vio0_in)
+ );
+
+ //*****************************************************************
+ // VIO ASYNC input: Display current IDELAY setting for up to 8 DQS
+ // and DQS Gate taps (8x6x2) = 96
+ //*****************************************************************
+
+ vio_async_in96 u_vio1
+ (
+ .control (cs_control1),
+ .async_in (vio1_in)
+ );
+
+ //*****************************************************************
+ // VIO ASYNC input: Display other calibration results
+ //*****************************************************************
+
+ vio_async_in100 u_vio2
+ (
+ .control (cs_control2),
+ .async_in (vio2_in)
+ );
+
+ //*****************************************************************
+ // VIO SYNC output: Dynamically change IDELAY taps
+ //*****************************************************************
+
+ vio_sync_out32 u_vio3
+ (
+ .control (cs_control3),
+ .clk (clkdiv0),
+ .sync_out (vio3_out)
+ );
+
+ //*****************************************************************
+ // Bit assignments:
+ // NOTE: Not all VIO, ILA inputs/outputs may be used - these will
+ // be dependent on the user's particular bit width
+ //*****************************************************************
+
+ if (DQ_WIDTH <= 32) begin: gen_dq_le_32
+ assign vio0_in[(6*DQ_WIDTH)-1:0]
+ = dbg_calib_dq_tap_cnt[(6*DQ_WIDTH)-1:0];
+ end else begin: gen_dq_gt_32
+ assign vio0_in = dbg_calib_dq_tap_cnt[191:0];
+ end
+
+ if (DQS_WIDTH <= 8) begin: gen_dqs_le_8
+ assign vio1_in[(6*DQS_WIDTH)-1:0]
+ = dbg_calib_dqs_tap_cnt[(6*DQS_WIDTH)-1:0];
+ assign vio1_in[(12*DQS_WIDTH)-1:(6*DQS_WIDTH)]
+ = dbg_calib_gate_tap_cnt[(6*DQS_WIDTH)-1:0];
+ end else begin: gen_dqs_gt_32
+ assign vio1_in[47:0] = dbg_calib_dqs_tap_cnt[47:0];
+ assign vio1_in[95:48] = dbg_calib_gate_tap_cnt[47:0];
+ end
+
+//dbg_calib_rd_data_sel
+
+ if (DQS_WIDTH <= 8) begin: gen_rdsel_le_8
+ assign vio2_in[(DQS_WIDTH)+7:8]
+ = dbg_calib_rd_data_sel[(DQS_WIDTH)-1:0];
+ end else begin: gen_rdsel_gt_32
+ assign vio2_in[15:8]
+ = dbg_calib_rd_data_sel[7:0];
+ end
+
+//dbg_calib_rden_dly
+
+ if (DQS_WIDTH <= 8) begin: gen_calrd_le_8
+ assign vio2_in[(5*DQS_WIDTH)+19:20]
+ = dbg_calib_rden_dly[(5*DQS_WIDTH)-1:0];
+ end else begin: gen_calrd_gt_32
+ assign vio2_in[59:20]
+ = dbg_calib_rden_dly[39:0];
+ end
+
+//dbg_calib_gate_dly
+
+ if (DQS_WIDTH <= 8) begin: gen_calgt_le_8
+ assign vio2_in[(5*DQS_WIDTH)+59:60]
+ = dbg_calib_gate_dly[(5*DQS_WIDTH)-1:0];
+ end else begin: gen_calgt_gt_32
+ assign vio2_in[99:60]
+ = dbg_calib_gate_dly[39:0];
+ end
+
+//dbg_sel_idel_dq
+
+ if (DQ_BITS <= 5) begin: gen_selid_le_5
+ assign dbg_sel_idel_dq[DQ_BITS-1:0]
+ = vio3_out[DQ_BITS+7:8];
+ end else begin: gen_selid_gt_32
+ assign dbg_sel_idel_dq[4:0]
+ = vio3_out[12:8];
+ end
+
+//dbg_sel_idel_dqs
+
+ if (DQS_BITS <= 3) begin: gen_seldqs_le_3
+ assign dbg_sel_idel_dqs[DQS_BITS:0]
+ = vio3_out[(DQS_BITS+16):16];
+ end else begin: gen_seldqs_gt_32
+ assign dbg_sel_idel_dqs[3:0]
+ = vio3_out[19:16];
+ end
+
+//dbg_sel_idel_gate
+
+ if (DQS_BITS <= 3) begin: gen_gtdqs_le_3
+ assign dbg_sel_idel_gate[DQS_BITS:0]
+ = vio3_out[(DQS_BITS+21):21];
+ end else begin: gen_gtdqs_gt_32
+ assign dbg_sel_idel_gate[3:0]
+ = vio3_out[24:21];
+ end
+
+
+ assign vio2_in[3:0] = dbg_calib_done;
+ assign vio2_in[7:4] = dbg_calib_err;
+
+ assign dbg_idel_up_all = vio3_out[0];
+ assign dbg_idel_down_all = vio3_out[1];
+ assign dbg_idel_up_dq = vio3_out[2];
+ assign dbg_idel_down_dq = vio3_out[3];
+ assign dbg_idel_up_dqs = vio3_out[4];
+ assign dbg_idel_down_dqs = vio3_out[5];
+ assign dbg_idel_up_gate = vio3_out[6];
+ assign dbg_idel_down_gate = vio3_out[7];
+ assign dbg_sel_all_idel_dq = vio3_out[15];
+ assign dbg_sel_all_idel_dqs = vio3_out[20];
+ assign dbg_sel_all_idel_gate = vio3_out[25];
+ end
+ endgenerate
+
+endmodule
--- /dev/null
+//*****************************************************************************
+// DISCLAIMER OF LIABILITY
+//
+// This text/file contains proprietary, confidential
+// information of Xilinx, Inc., is distributed under license
+// from Xilinx, Inc., and may be used, copied and/or
+// disclosed only pursuant to the terms of a valid license
+// agreement with Xilinx, Inc. Xilinx hereby grants you a
+// license to use this text/file solely for design, simulation,
+// implementation and creation of design files limited
+// to Xilinx devices or technologies. Use with non-Xilinx
+// devices or technologies is expressly prohibited and
+// immediately terminates your license unless covered by
+// a separate agreement.
+//
+// Xilinx is providing this design, code, or information
+// "as-is" solely for use in developing programs and
+// solutions for Xilinx devices, with no obligation on the
+// part of Xilinx to provide support. By providing this design,
+// code, or information as one possible implementation of
+// this feature, application or standard, Xilinx is making no
+// representation that this implementation is free from any
+// claims of infringement. You are responsible for
+// obtaining any rights you may require for your implementation.
+// Xilinx expressly disclaims any warranty whatsoever with
+// respect to the adequacy of the implementation, including
+// but not limited to any warranties or representations that this
+// implementation is free from claims of infringement, implied
+// warranties of merchantability or fitness for a particular
+// purpose.
+//
+// Xilinx products are not intended for use in life support
+// appliances, devices, or systems. Use in such applications is
+// expressly prohibited.
+//
+// Any modifications that are made to the Source Code are
+// done at the user\92s sole risk and will be unsupported.
+//
+// Copyright (c) 2006-2007 Xilinx, Inc. All rights reserved.
+//
+// This copyright and support notice must be retained as part
+// of this text at all times.
+//*****************************************************************************
+// ____ ____
+// / /\/ /
+// /___/ \ / Vendor: Xilinx
+// \ \ \/ Version: 2.3
+// \ \ Application: MIG
+// / / Filename: ddr2_top.v
+// /___/ /\ Date Last Modified: $Date: 2008/07/29 15:24:03 $
+// \ \ / \ Date Created: Wed Aug 16 2006
+// \___\/\___\
+//
+//Device: Virtex-5
+//Design Name: DDR2
+//Purpose:
+// System level module. This level contains just the memory controller.
+// This level will be intiantated when the user wants to remove the
+// synthesizable test bench, IDELAY control block and the clock
+// generation modules.
+//Reference:
+//Revision History:
+//*****************************************************************************
+
+`timescale 1ns/1ps
+
+module ddr2_top #
+ (
+ // Following parameters are for 72-bit RDIMM design (for ML561 Reference
+ // board design). Actual values may be different. Actual parameters values
+ // are passed from design top module ddr2_sdram module. Please refer to
+ // the ddr2_sdram module for actual values.
+ parameter BANK_WIDTH = 2, // # of memory bank addr bits
+ parameter CKE_WIDTH = 1, // # of memory clock enable outputs
+ parameter CLK_WIDTH = 1, // # of clock outputs
+ parameter COL_WIDTH = 10, // # of memory column bits
+ parameter CS_NUM = 1, // # of separate memory chip selects
+ parameter CS_BITS = 0, // set to log2(CS_NUM) (rounded up)
+ parameter CS_WIDTH = 1, // # of total memory chip selects
+ parameter USE_DM_PORT = 1, // enable Data Mask (=1 enable)
+ parameter DM_WIDTH = 9, // # of data mask bits
+ parameter DQ_WIDTH = 72, // # of data width
+ parameter DQ_BITS = 7, // set to log2(DQS_WIDTH*DQ_PER_DQS)
+ parameter DQ_PER_DQS = 8, // # of DQ data bits per strobe
+ parameter DQS_WIDTH = 9, // # of DQS strobes
+ parameter DQS_BITS = 4, // set to log2(DQS_WIDTH)
+ parameter HIGH_PERFORMANCE_MODE = "TRUE", // IODELAY Performance Mode
+ parameter ODT_WIDTH = 1, // # of memory on-die term enables
+ parameter ROW_WIDTH = 14, // # of memory row & # of addr bits
+ parameter APPDATA_WIDTH = 144, // # of usr read/write data bus bits
+ parameter ADDITIVE_LAT = 0, // additive write latency
+ parameter BURST_LEN = 4, // burst length (in double words)
+ parameter BURST_TYPE = 0, // burst type (=0 seq; =1 interlved)
+ parameter CAS_LAT = 5, // CAS latency
+ parameter ECC_ENABLE = 0, // enable ECC (=1 enable)
+ parameter ODT_TYPE = 1, // ODT (=0(none),=1(75),=2(150),=3(50))
+ parameter MULTI_BANK_EN = 1, // enable bank management
+ parameter TWO_T_TIME_EN = 0, // 2t timing for unbuffered dimms
+ parameter REDUCE_DRV = 0, // reduced strength mem I/O (=1 yes)
+ parameter REG_ENABLE = 1, // registered addr/ctrl (=1 yes)
+ parameter TREFI_NS = 7800, // auto refresh interval (ns)
+ parameter TRAS = 40000, // active->precharge delay
+ parameter TRCD = 15000, // active->read/write delay
+ parameter TRFC = 105000, // ref->ref, ref->active delay
+ parameter TRP = 15000, // precharge->command delay
+ parameter TRTP = 7500, // read->precharge delay
+ parameter TWR = 15000, // used to determine wr->prech
+ parameter TWTR = 10000, // write->read delay
+ parameter CLK_PERIOD = 3000, // Core/Mem clk period (in ps)
+ parameter SIM_ONLY = 0, // = 1 to skip power up delay
+ parameter DEBUG_EN = 0, // Enable debug signals/controls
+ parameter DQS_IO_COL = 0, // I/O column location of DQS groups
+ parameter DQ_IO_MS = 0, // Master/Slave location of DQ I/O
+ parameter EN_SYN = "FALSE"
+ )
+ (
+ input clk0,
+ input clk90,
+ input clkdiv0,
+ input rst0,
+ input rst90,
+ input rstdiv0,
+ //added by xtan & gdgib
+ input af_clk, //address fifo clk
+ input rb_clk, //read buffer clk
+ input wb_clk, //write buffer clk
+ input af_rst, //address fifo rst
+ input rb_rst, //read buffer rst
+ input wb_rst, //write buffer rst
+ output rb_full, //read buffer is full
+ //end of add
+ input [2:0] app_af_cmd,
+ input [30:0] app_af_addr,
+ input app_af_wren,
+ input app_wdf_wren,
+ input [APPDATA_WIDTH-1:0] app_wdf_data,
+ input [(APPDATA_WIDTH/8)-1:0] app_wdf_mask_data,
+ output app_af_afull,
+ output app_wdf_afull,
+ output rd_data_valid,
+ input rd_data_rden,
+ output [APPDATA_WIDTH-1:0] rd_data_fifo_out,
+ output [1:0] rd_ecc_error,
+ output phy_init_done,
+ output [CLK_WIDTH-1:0] ddr2_ck,
+ output [CLK_WIDTH-1:0] ddr2_ck_n,
+ output [ROW_WIDTH-1:0] ddr2_a,
+ output [BANK_WIDTH-1:0] ddr2_ba,
+ output ddr2_ras_n,
+ output ddr2_cas_n,
+ output ddr2_we_n,
+ output [CS_WIDTH-1:0] ddr2_cs_n,
+ output [CKE_WIDTH-1:0] ddr2_cke,
+ output [ODT_WIDTH-1:0] ddr2_odt,
+ output [DM_WIDTH-1:0] ddr2_dm,
+ inout [DQS_WIDTH-1:0] ddr2_dqs,
+ inout [DQS_WIDTH-1:0] ddr2_dqs_n,
+ inout [DQ_WIDTH-1:0] ddr2_dq,
+ // Debug signals (optional use)
+ input dbg_idel_up_all,
+ input dbg_idel_down_all,
+ input dbg_idel_up_dq,
+ input dbg_idel_down_dq,
+ input dbg_idel_up_dqs,
+ input dbg_idel_down_dqs,
+ input dbg_idel_up_gate,
+ input dbg_idel_down_gate,
+ input [DQ_BITS-1:0] dbg_sel_idel_dq,
+ input dbg_sel_all_idel_dq,
+ input [DQS_BITS:0] dbg_sel_idel_dqs,
+ input dbg_sel_all_idel_dqs,
+ input [DQS_BITS:0] dbg_sel_idel_gate,
+ input dbg_sel_all_idel_gate,
+ output [3:0] dbg_calib_done,
+ output [3:0] dbg_calib_err,
+ output [(6*DQ_WIDTH)-1:0] dbg_calib_dq_tap_cnt,
+ output [(6*DQS_WIDTH)-1:0] dbg_calib_dqs_tap_cnt,
+ output [(6*DQS_WIDTH)-1:0] dbg_calib_gate_tap_cnt,
+ output [DQS_WIDTH-1:0] dbg_calib_rd_data_sel,
+ output [(5*DQS_WIDTH)-1:0] dbg_calib_rden_dly,
+ output [(5*DQS_WIDTH)-1:0] dbg_calib_gate_dly
+ );
+
+ // memory initialization/control logic
+ ddr2_mem_if_top #
+ (
+ .BANK_WIDTH (BANK_WIDTH),
+ .CKE_WIDTH (CKE_WIDTH),
+ .CLK_WIDTH (CLK_WIDTH),
+ .COL_WIDTH (COL_WIDTH),
+ .CS_BITS (CS_BITS),
+ .CS_NUM (CS_NUM),
+ .CS_WIDTH (CS_WIDTH),
+ .USE_DM_PORT (USE_DM_PORT),
+ .DM_WIDTH (DM_WIDTH),
+ .DQ_WIDTH (DQ_WIDTH),
+ .DQ_BITS (DQ_BITS),
+ .DQ_PER_DQS (DQ_PER_DQS),
+ .DQS_BITS (DQS_BITS),
+ .DQS_WIDTH (DQS_WIDTH),
+ .HIGH_PERFORMANCE_MODE (HIGH_PERFORMANCE_MODE),
+ .ODT_WIDTH (ODT_WIDTH),
+ .ROW_WIDTH (ROW_WIDTH),
+ .APPDATA_WIDTH (APPDATA_WIDTH),
+ .ADDITIVE_LAT (ADDITIVE_LAT),
+ .BURST_LEN (BURST_LEN),
+ .BURST_TYPE (BURST_TYPE),
+ .CAS_LAT (CAS_LAT),
+ .ECC_ENABLE (ECC_ENABLE),
+ .MULTI_BANK_EN (MULTI_BANK_EN),
+ .TWO_T_TIME_EN (TWO_T_TIME_EN),
+ .ODT_TYPE (ODT_TYPE),
+ .DDR_TYPE (1),
+ .REDUCE_DRV (REDUCE_DRV),
+ .REG_ENABLE (REG_ENABLE),
+ .TREFI_NS (TREFI_NS),
+ .TRAS (TRAS),
+ .TRCD (TRCD),
+ .TRFC (TRFC),
+ .TRP (TRP),
+ .TRTP (TRTP),
+ .TWR (TWR),
+ .TWTR (TWTR),
+ .CLK_PERIOD (CLK_PERIOD),
+ .SIM_ONLY (SIM_ONLY),
+ .DEBUG_EN (DEBUG_EN),
+ .DQS_IO_COL (DQS_IO_COL),
+ .DQ_IO_MS (DQ_IO_MS),
+ .EN_SYN (EN_SYN)
+ )
+ u_mem_if_top
+ (
+ .clk0 (clk0),
+ .clk90 (clk90),
+ .clkdiv0 (clkdiv0),
+ .rst0 (rst0),
+ .rst90 (rst90),
+ .rstdiv0 (rstdiv0),
+ .af_clk (af_clk),
+ .rb_clk (rb_clk),
+ .wb_clk (wb_clk),
+ .af_rst (af_rst),
+ .rb_rst (rb_rst),
+ .wb_rst (wb_rst),
+ .rb_full (rb_full),
+ .app_af_cmd (app_af_cmd),
+ .app_af_addr (app_af_addr),
+ .app_af_wren (app_af_wren),
+ .app_wdf_wren (app_wdf_wren),
+ .app_wdf_data (app_wdf_data),
+ .app_wdf_mask_data (app_wdf_mask_data),
+ .app_af_afull (app_af_afull),
+ .app_wdf_afull (app_wdf_afull),
+ .rd_data_valid (rd_data_valid),
+ .rd_data_rden (rd_data_rden),
+ .rd_data_fifo_out (rd_data_fifo_out),
+ .rd_ecc_error (rd_ecc_error),
+ .phy_init_done (phy_init_done),
+ .ddr_ck (ddr2_ck),
+ .ddr_ck_n (ddr2_ck_n),
+ .ddr_addr (ddr2_a),
+ .ddr_ba (ddr2_ba),
+ .ddr_ras_n (ddr2_ras_n),
+ .ddr_cas_n (ddr2_cas_n),
+ .ddr_we_n (ddr2_we_n),
+ .ddr_cs_n (ddr2_cs_n),
+ .ddr_cke (ddr2_cke),
+ .ddr_odt (ddr2_odt),
+ .ddr_dm (ddr2_dm),
+ .ddr_dqs (ddr2_dqs),
+ .ddr_dqs_n (ddr2_dqs_n),
+ .ddr_dq (ddr2_dq),
+ .dbg_idel_up_all (dbg_idel_up_all),
+ .dbg_idel_down_all (dbg_idel_down_all),
+ .dbg_idel_up_dq (dbg_idel_up_dq),
+ .dbg_idel_down_dq (dbg_idel_down_dq),
+ .dbg_idel_up_dqs (dbg_idel_up_dqs),
+ .dbg_idel_down_dqs (dbg_idel_down_dqs),
+ .dbg_idel_up_gate (dbg_idel_up_gate),
+ .dbg_idel_down_gate (dbg_idel_down_gate),
+ .dbg_sel_idel_dq (dbg_sel_idel_dq),
+ .dbg_sel_all_idel_dq (dbg_sel_all_idel_dq),
+ .dbg_sel_idel_dqs (dbg_sel_idel_dqs),
+ .dbg_sel_all_idel_dqs (dbg_sel_all_idel_dqs),
+ .dbg_sel_idel_gate (dbg_sel_idel_gate),
+ .dbg_sel_all_idel_gate (dbg_sel_all_idel_gate),
+ .dbg_calib_done (dbg_calib_done),
+ .dbg_calib_err (dbg_calib_err),
+ .dbg_calib_dq_tap_cnt (dbg_calib_dq_tap_cnt),
+ .dbg_calib_dqs_tap_cnt (dbg_calib_dqs_tap_cnt),
+ .dbg_calib_gate_tap_cnt (dbg_calib_gate_tap_cnt),
+ .dbg_calib_rd_data_sel (dbg_calib_rd_data_sel),
+ .dbg_calib_rden_dly (dbg_calib_rden_dly),
+ .dbg_calib_gate_dly (dbg_calib_gate_dly)
+ );
+
+endmodule
--- /dev/null
+//*****************************************************************************
+// DISCLAIMER OF LIABILITY
+//
+// This text/file contains proprietary, confidential
+// information of Xilinx, Inc., is distributed under license
+// from Xilinx, Inc., and may be used, copied and/or
+// disclosed only pursuant to the terms of a valid license
+// agreement with Xilinx, Inc. Xilinx hereby grants you a
+// license to use this text/file solely for design, simulation,
+// implementation and creation of design files limited
+// to Xilinx devices or technologies. Use with non-Xilinx
+// devices or technologies is expressly prohibited and
+// immediately terminates your license unless covered by
+// a separate agreement.
+//
+// Xilinx is providing this design, code, or information
+// "as-is" solely for use in developing programs and
+// solutions for Xilinx devices, with no obligation on the
+// part of Xilinx to provide support. By providing this design,
+// code, or information as one possible implementation of
+// this feature, application or standard, Xilinx is making no
+// representation that this implementation is free from any
+// claims of infringement. You are responsible for
+// obtaining any rights you may require for your implementation.
+// Xilinx expressly disclaims any warranty whatsoever with
+// respect to the adequacy of the implementation, including
+// but not limited to any warranties or representations that this
+// implementation is free from claims of infringement, implied
+// warranties of merchantability or fitness for a particular
+// purpose.
+//
+// Xilinx products are not intended for use in life support
+// appliances, devices, or systems. Use in such applications is
+// expressly prohibited.
+//
+// Any modifications that are made to the Source Code are
+// done at the user\92s sole risk and will be unsupported.
+//
+// Copyright (c) 2006-2007 Xilinx, Inc. All rights reserved.
+//
+// This copyright and support notice must be retained as part
+// of this text at all times.
+//*****************************************************************************
+// ____ ____
+// / /\/ /
+// /___/ \ / Vendor: Xilinx
+// \ \ \/ Version: 2.3
+// \ \ Application: MIG
+// / / Filename: ddr2_usr_addr_fifo.v
+// /___/ /\ Date Last Modified: $Date: 2008/05/08 15:20:47 $
+// \ \ / \ Date Created: Mon Aug 28 2006
+// \___\/\___\
+//
+//Device: Virtex-5
+//Design Name: DDR2
+//Purpose:
+// This module instantiates the block RAM based FIFO to store the user
+// address and the command information. Also calculates potential bank/row
+// conflicts by comparing the new address with last address issued.
+//Reference:
+//Revision History:
+//*****************************************************************************
+
+`timescale 1ns/1ps
+
+module ddr2_usr_addr_fifo #
+ (
+ // Following parameters are for 72-bit RDIMM design (for ML561 Reference
+ // board design). Actual values may be different. Actual parameters values
+ // are passed from design top module ddr2_sdram module. Please refer to
+ // the ddr2_sdram module for actual values.
+ parameter BANK_WIDTH = 2,
+ parameter COL_WIDTH = 10,
+ parameter CS_BITS = 0,
+ parameter ROW_WIDTH = 14,
+ parameter EN_SYN = "FALSE"
+ )
+ (
+ input clk0, //ddr2 phy clock
+ input rst0,
+ //start new port by xtan & gdgib
+ input af_clk, //user side clock
+ input af_rst, //user side reset
+ //end new port by xtan & gdgib
+ input [2:0] app_af_cmd,
+ input [30:0] app_af_addr,
+ input app_af_wren,
+ input ctrl_af_rden,
+ output [2:0] af_cmd,
+ output [30:0] af_addr,
+ output af_empty,
+ output app_af_afull
+ );
+
+ wire [35:0] fifo_data_out;
+ reg rst_r;
+
+
+ always @(posedge clk0)
+ rst_r <= rst0;
+
+
+ //***************************************************************************
+
+ assign af_cmd = fifo_data_out[33:31];
+ assign af_addr = fifo_data_out[30:0];
+
+ //***************************************************************************
+
+ FIFO36 #
+ (
+ .ALMOST_EMPTY_OFFSET (13'h0007),
+ .ALMOST_FULL_OFFSET (13'h000F),
+ .DATA_WIDTH (36),
+ .DO_REG (1),
+ .EN_SYN (EN_SYN),
+ .FIRST_WORD_FALL_THROUGH ("FALSE")
+ )
+ u_af
+ (
+ .ALMOSTEMPTY (),
+ .ALMOSTFULL (app_af_afull),
+ .DO (fifo_data_out[31:0]),
+ .DOP (fifo_data_out[35:32]),
+ .EMPTY (af_empty),
+ .FULL (),
+ .RDCOUNT (),
+ .RDERR (),
+ .WRCOUNT (),
+ .WRERR (),
+ .DI ({app_af_cmd[0],app_af_addr}),
+ .DIP ({2'b00,app_af_cmd[2:1]}),
+ .RDCLK (clk0),
+ .RDEN (ctrl_af_rden),
+ .RST (rst_r | af_rst),
+ .WRCLK (af_clk), //changed by xtan: clk0 -> af_clk
+ .WREN (app_af_wren)
+ );
+
+endmodule
--- /dev/null
+//*****************************************************************************
+// DISCLAIMER OF LIABILITY
+//
+// This text/file contains proprietary, confidential
+// information of Xilinx, Inc., is distributed under license
+// from Xilinx, Inc., and may be used, copied and/or
+// disclosed only pursuant to the terms of a valid license
+// agreement with Xilinx, Inc. Xilinx hereby grants you a
+// license to use this text/file solely for design, simulation,
+// implementation and creation of design files limited
+// to Xilinx devices or technologies. Use with non-Xilinx
+// devices or technologies is expressly prohibited and
+// immediately terminates your license unless covered by
+// a separate agreement.
+//
+// Xilinx is providing this design, code, or information
+// "as-is" solely for use in developing programs and
+// solutions for Xilinx devices, with no obligation on the
+// part of Xilinx to provide support. By providing this design,
+// code, or information as one possible implementation of
+// this feature, application or standard, Xilinx is making no
+// representation that this implementation is free from any
+// claims of infringement. You are responsible for
+// obtaining any rights you may require for your implementation.
+// Xilinx expressly disclaims any warranty whatsoever with
+// respect to the adequacy of the implementation, including
+// but not limited to any warranties or representations that this
+// implementation is free from claims of infringement, implied
+// warranties of merchantability or fitness for a particular
+// purpose.
+//
+// Xilinx products are not intended for use in life support
+// appliances, devices, or systems. Use in such applications is
+// expressly prohibited.
+//
+// Any modifications that are made to the Source Code are
+// done at the user�s sole risk and will be unsupported.
+//
+// Copyright (c) 2006-2007 Xilinx, Inc. All rights reserved.
+//
+// This copyright and support notice must be retained as part
+// of this text at all times.
+//*****************************************************************************
+// ____ ____
+// / /\/ /
+// /___/ \ / Vendor: Xilinx
+// \ \ \/ Version: 2.3
+// \ \ Application: MIG
+// / / Filename: ddr2_usr_rd.v
+// /___/ /\ Date Last Modified: $Date: 2008/07/02 14:03:08 $
+// \ \ / \ Date Created: Tue Aug 29 2006
+// \___\/\___\
+//
+//Device: Virtex-5
+//Design Name: DDR2
+//Purpose:
+// The delay between the read data with respect to the command issued is
+// calculted in terms of no. of clocks. This data is then stored into the
+// FIFOs and then read back and given as the ouput for comparison.
+//Reference:
+//Revision History:
+//*****************************************************************************
+
+`timescale 1ns/1ps
+
+module ddr2_usr_rd #
+ (
+ // Following parameters are for 72-bit RDIMM design (for ML561 Reference
+ // board design). Actual values may be different. Actual parameters values
+ // are passed from design top module ddr2_sdram module. Please refer to
+ // the ddr2_sdram module for actual values.
+ parameter DQ_PER_DQS = 8,
+ parameter DQS_WIDTH = 9,
+ parameter APPDATA_WIDTH = 144,
+ parameter APPDATA_BURST_LEN = 2,
+ parameter APPDATA_BURST_BITS = 1,
+ parameter ECC_WIDTH = 72,
+ parameter ECC_ENABLE = 0,
+ parameter EN_SYN = "FALSE"
+ )
+ (
+ input clk0, //read buffer write clock
+ input rst0,
+ //new ports by xtan & gdgib
+ input rb_clk, //read buffer read clock
+ input rb_rst, //read buffer read reset
+ output rb_full, //read buffer is full (error)
+ //end new signals by xtan & gdgib
+ input [(DQS_WIDTH*DQ_PER_DQS)-1:0] rd_data_in_rise,
+ input [(DQS_WIDTH*DQ_PER_DQS)-1:0] rd_data_in_fall,
+ input [DQS_WIDTH-1:0] ctrl_rden,
+ input [DQS_WIDTH-1:0] ctrl_rden_sel,
+ output reg [1:0] rd_ecc_error,
+ output reg rd_data_valid,
+ input rd_data_rden,
+ output reg [(APPDATA_WIDTH/2)-1:0] rd_data_out_rise,
+ output reg [(APPDATA_WIDTH/2)-1:0] rd_data_out_fall,
+ output rd_fifo_clear
+ );
+
+ // determine number of FIFO72's to use based on data width
+ localparam RDF_FIFO_NUM = ((APPDATA_WIDTH/2)+63)/64;
+
+ reg [DQS_WIDTH-1:0] ctrl_rden_r;
+ wire [(DQS_WIDTH*DQ_PER_DQS)-1:0] fall_data;
+ reg [(DQS_WIDTH*DQ_PER_DQS)-1:0] rd_data_in_fall_r;
+ reg [(DQS_WIDTH*DQ_PER_DQS)-1:0] rd_data_in_rise_r;
+ wire rden;
+ reg [DQS_WIDTH-1:0] rden_sel_r
+ /* synthesis syn_preserve=1 */;
+ wire [DQS_WIDTH-1:0] rden_sel_mux;
+ wire [(DQS_WIDTH*DQ_PER_DQS)-1:0] rise_data;
+
+ // ECC specific signals
+ wire [((RDF_FIFO_NUM -1) *2)+1:0] db_ecc_error;
+ reg [(DQS_WIDTH*DQ_PER_DQS)-1:0] fall_data_r;
+ reg rden_r;
+ wire [(APPDATA_WIDTH/2)-1:0] rd_data_out_fall_temp;
+ wire [(APPDATA_WIDTH/2)-1:0] rd_data_out_rise_temp;
+ reg rst_r;
+ reg [(DQS_WIDTH*DQ_PER_DQS)-1:0] rise_data_r;
+ wire [((RDF_FIFO_NUM -1) *2)+1:0] sb_ecc_error;
+ wire [RDF_FIFO_NUM-1:0] rdf_empty;
+ wire fifo_read, fifo_preread;
+
+ reg [1:0] rd_data_valid_pre;
+ wire [RDF_FIFO_NUM-1:0] w_rb_full; //added by xtan
+
+ //***************************************************************************
+
+ reg [APPDATA_BURST_BITS-1:0] blfifo_readcount, blfifo_writecount;
+ wire blfifo_readterminal, blfifo_writeterminal;
+ wire blfifo_read, blfifo_write;
+ wire blfifo_empty, blfifo_full;
+
+ asyncfifo_dmem_1b blfifo (
+ .din(1'b0),
+ .rd_clk(rb_clk),
+ .rd_en(blfifo_read),
+ .rst(rst_r | rb_rst),
+ .wr_clk(clk0),
+ .wr_en(blfifo_write),
+ .dout(),
+ .empty(blfifo_empty),
+ .full(blfifo_full));
+ assign rd_fifo_clear = ~blfifo_full;
+
+ always @ (posedge rb_clk) begin
+ if (rb_rst) blfifo_readcount <= 0;
+ else if (fifo_read & ~rdf_empty[0]) begin
+ if (blfifo_readterminal) blfifo_readcount <= 0;
+ else blfifo_readcount <= blfifo_readcount + 1;
+ end
+ end
+
+ always @ (posedge clk0) begin
+ if (rst_r | rst0) blfifo_writecount <= 0;
+ else if (rden_r) begin
+ if (blfifo_writeterminal) blfifo_writecount <= 0;
+ else blfifo_writecount <= blfifo_writecount + 1;
+ end
+ end
+
+ assign blfifo_readterminal = (blfifo_readcount == (APPDATA_BURST_LEN - 1));
+ assign blfifo_writeterminal = (blfifo_writecount == (APPDATA_BURST_LEN - 1));
+ assign blfifo_read = (~|blfifo_readcount) & (fifo_read & rd_data_valid);
+ assign blfifo_write = blfifo_writeterminal & rden_r;
+
+ //***************************************************************************
+
+ always @(posedge clk0) begin
+ rden_sel_r <= ctrl_rden_sel;
+ ctrl_rden_r <= ctrl_rden;
+ rd_data_in_rise_r <= rd_data_in_rise;
+ rd_data_in_fall_r <= rd_data_in_fall;
+ end
+
+ // Instantiate primitive to allow this flop to be attached to multicycle
+ // path constraint in UCF. Multicycle path allowed for data from read FIFO.
+ // This is the same signal as RDEN_SEL_R, but is only used to select data
+ // (does not affect control signals)
+ genvar rd_i;
+ generate
+ for (rd_i = 0; rd_i < DQS_WIDTH; rd_i = rd_i+1) begin: gen_rden_sel_mux
+ FDRSE u_ff_rden_sel_mux
+ (
+ .Q (rden_sel_mux[rd_i]),
+ .C (clk0),
+ .CE (1'b1),
+ .D (ctrl_rden_sel[rd_i]),
+ .R (1'b0),
+ .S (1'b0)
+ ) /* synthesis syn_preserve=1 */;
+ end
+ endgenerate
+
+ // determine correct read data valid signal timing
+ assign rden = (rden_sel_r[0]) ? ctrl_rden[0] : ctrl_rden_r[0];
+
+ // assign data based on the skew
+ genvar data_i;
+ generate
+ for(data_i = 0; data_i < DQS_WIDTH; data_i = data_i+1) begin: gen_data
+ assign rise_data[(data_i*DQ_PER_DQS)+(DQ_PER_DQS-1):
+ (data_i*DQ_PER_DQS)]
+ = (rden_sel_mux[data_i]) ?
+ rd_data_in_rise[(data_i*DQ_PER_DQS)+(DQ_PER_DQS-1) :
+ (data_i*DQ_PER_DQS)] :
+ rd_data_in_rise_r[(data_i*DQ_PER_DQS)+(DQ_PER_DQS-1):
+ (data_i*DQ_PER_DQS)];
+ assign fall_data[(data_i*DQ_PER_DQS)+(DQ_PER_DQS-1):
+ (data_i*DQ_PER_DQS)]
+ = (rden_sel_mux[data_i]) ?
+ rd_data_in_fall[(data_i*DQ_PER_DQS)+(DQ_PER_DQS-1):
+ (data_i*DQ_PER_DQS)] :
+ rd_data_in_fall_r[(data_i*DQ_PER_DQS)+(DQ_PER_DQS-1):
+ (data_i*DQ_PER_DQS)];
+ end
+ endgenerate
+
+ assign rb_full = w_rb_full[0];
+
+ // Generate RST for FIFO reset AND for read/write enable:
+ // ECC FIFO always being read from and written to
+ always @(posedge clk0)
+ rst_r <= rst0;
+
+ always @(posedge clk0) begin
+ rise_data_r <= rise_data;
+ fall_data_r <= fall_data;
+ end
+
+ // delay read valid to take into account max delay difference btw
+ // the read enable coming from the different DQS groups
+ always @(posedge clk0) begin
+ if (rst0) rden_r <= 1'b0;
+ else rden_r <= rden;
+ end
+
+ always @(posedge rb_clk) begin
+ if (fifo_read) begin
+ rd_data_out_rise <= rd_data_out_rise_temp;
+ rd_data_out_fall <= rd_data_out_fall_temp;
+ end
+
+ if (rb_rst) rd_data_valid <= 1'b0;
+ else if (fifo_read) rd_data_valid <= rd_data_valid_pre[1];
+
+ if (rb_rst) begin
+ rd_data_valid_pre <= 2'b00;
+ end else begin
+ rd_data_valid_pre[0] <= fifo_preread & ~rdf_empty[0];
+ rd_data_valid_pre[1] <= rd_data_valid_pre[0] | (fifo_preread ? 1'b0 : rd_data_valid_pre[1]);
+ end
+ end
+
+ assign fifo_preread = (~|rd_data_valid_pre | (fifo_read & ^rd_data_valid_pre)) & ~(rst0 | rst_r | rb_rst);
+ assign fifo_read = (~rd_data_valid | rd_data_rden) & ~(rst0 | rst_r | rb_rst);
+
+ genvar rdf_i;
+ generate
+ if (ECC_ENABLE) begin
+ always @(posedge rb_clk) begin
+ if (fifo_preread) begin
+ rd_ecc_error[0] <= |sb_ecc_error;
+ rd_ecc_error[1] <= |db_ecc_error;
+ end
+ end
+
+ for (rdf_i = 0; rdf_i < RDF_FIFO_NUM; rdf_i = rdf_i + 1) begin: gen_rdf
+
+ FIFO36_72 # // rise fifo
+ (
+ .ALMOST_EMPTY_OFFSET (9'h007),
+ .ALMOST_FULL_OFFSET (9'h00F),
+ .DO_REG (1), // extra CC output delay
+ .EN_ECC_WRITE ("FALSE"),
+ .EN_ECC_READ ("TRUE"),
+ .EN_SYN (EN_SYN),
+ .FIRST_WORD_FALL_THROUGH ("FALSE")
+ )
+ u_rdf
+ (
+ .ALMOSTEMPTY (),
+ .ALMOSTFULL (),
+ .DBITERR (db_ecc_error[rdf_i + rdf_i]),
+ .DO (rd_data_out_rise_temp[(64*(rdf_i+1))-1:
+ (64 *rdf_i)]),
+ .DOP (),
+ .ECCPARITY (),
+ .EMPTY (rdf_empty[rdf_i]),
+ .FULL (w_rb_full[rdf_i]),
+ .RDCOUNT (),
+ .RDERR (),
+ .SBITERR (sb_ecc_error[rdf_i + rdf_i]),
+ .WRCOUNT (),
+ .WRERR (),
+ .DI (rise_data_r[((64*(rdf_i+1)) + (rdf_i*8))-1:
+ (64 *rdf_i)+(rdf_i*8)]),
+ .DIP (rise_data_r[(72*(rdf_i+1))-1:
+ (64*(rdf_i+1))+ (8*rdf_i)]),
+ .RDCLK (rb_clk),
+ .RDEN (fifo_preread),
+ .RST (rst_r | rb_rst),
+ .WRCLK (clk0),
+ .WREN (rden_r)
+ );
+
+ FIFO36_72 # // fall_fifo
+ (
+ .ALMOST_EMPTY_OFFSET (9'h007),
+ .ALMOST_FULL_OFFSET (9'h00F),
+ .DO_REG (1), // extra CC output delay
+ .EN_ECC_WRITE ("FALSE"),
+ .EN_ECC_READ ("TRUE"),
+ .EN_SYN (EN_SYN),
+ .FIRST_WORD_FALL_THROUGH ("FALSE")
+ )
+ u_rdf1
+ (
+ .ALMOSTEMPTY (),
+ .ALMOSTFULL (),
+ .DBITERR (db_ecc_error[(rdf_i+1) + rdf_i]),
+ .DO (rd_data_out_fall_temp[(64*(rdf_i+1))-1:
+ (64 *rdf_i)]),
+ .DOP (),
+ .ECCPARITY (),
+ .EMPTY (),
+ .FULL (),
+ .RDCOUNT (),
+ .RDERR (),
+ .SBITERR (sb_ecc_error[(rdf_i+1) + rdf_i]),
+ .WRCOUNT (),
+ .WRERR (),
+ .DI (fall_data_r[((64*(rdf_i+1)) + (rdf_i*8))-1:
+ (64*rdf_i)+(rdf_i*8)]),
+ .DIP (fall_data_r[(72*(rdf_i+1))-1:
+ (64*(rdf_i+1))+ (8*rdf_i)]),
+ .RDCLK (rb_clk),
+ .RDEN (fifo_preread),
+ .RST (rst_r | rb_rst), // or can use rst0
+ .WRCLK (clk0),
+ .WREN (rden_r)
+ );
+ end
+ end else begin
+ for (rdf_i = 0; rdf_i < RDF_FIFO_NUM; rdf_i = rdf_i + 1) begin: gen_rdf
+
+ FIFO36_72 # // rise fifo
+ (
+ .ALMOST_EMPTY_OFFSET (9'h007),
+ .ALMOST_FULL_OFFSET (9'h00F),
+ .DO_REG (1), // extra CC output delay
+ .EN_ECC_WRITE ("FALSE"),
+ .EN_ECC_READ ("FALSE"),
+ .EN_SYN (EN_SYN),
+ .FIRST_WORD_FALL_THROUGH ("FALSE")
+ )
+ u_rdf
+ (
+ .ALMOSTEMPTY (),
+ .ALMOSTFULL (),
+ .DBITERR (),
+ .DO (rd_data_out_rise_temp[(64*(rdf_i+1))-1:
+ (64 *rdf_i)]),
+ .DOP (),
+ .ECCPARITY (),
+ .EMPTY (rdf_empty[rdf_i]),
+ .FULL (w_rb_full[rdf_i]),
+ .RDCOUNT (),
+ .RDERR (),
+ .SBITERR (),
+ .WRCOUNT (),
+ .WRERR (),
+ .DI (rise_data_r[((64*(rdf_i+1)) + (rdf_i*8))-1:
+ (64 *rdf_i)+(rdf_i*8)]),
+ .DIP (),
+ .RDCLK (rb_clk),
+ .RDEN (fifo_preread),
+ .RST (rst_r | rb_rst),
+ .WRCLK (clk0),
+ .WREN (rden_r)
+ );
+
+ FIFO36_72 # // fall_fifo
+ (
+ .ALMOST_EMPTY_OFFSET (9'h007),
+ .ALMOST_FULL_OFFSET (9'h00F),
+ .DO_REG (1), // extra CC output delay
+ .EN_ECC_WRITE ("FALSE"),
+ .EN_ECC_READ ("FALSE"),
+ .EN_SYN (EN_SYN),
+ .FIRST_WORD_FALL_THROUGH ("FALSE")
+ )
+ u_rdf1
+ (
+ .ALMOSTEMPTY (),
+ .ALMOSTFULL (),
+ .DBITERR (),
+ .DO (rd_data_out_fall_temp[(64*(rdf_i+1))-1:
+ (64 *rdf_i)]),
+ .DOP (),
+ .ECCPARITY (),
+ .EMPTY (),
+ .FULL (),
+ .RDCOUNT (),
+ .RDERR (),
+ .SBITERR (),
+ .WRCOUNT (),
+ .WRERR (),
+ .DI (fall_data_r[((64*(rdf_i+1)) + (rdf_i*8))-1:
+ (64*rdf_i)+(rdf_i*8)]),
+ .DIP (),
+ .RDCLK (rb_clk),
+ .RDEN (fifo_preread),
+ .RST (rst_r | rb_rst), // or can use rst0
+ .WRCLK (clk0),
+ .WREN (rden_r)
+ );
+ end
+ end
+ endgenerate
+
+endmodule
--- /dev/null
+//*****************************************************************************
+// DISCLAIMER OF LIABILITY
+//
+// This text/file contains proprietary, confidential
+// information of Xilinx, Inc., is distributed under license
+// from Xilinx, Inc., and may be used, copied and/or
+// disclosed only pursuant to the terms of a valid license
+// agreement with Xilinx, Inc. Xilinx hereby grants you a
+// license to use this text/file solely for design, simulation,
+// implementation and creation of design files limited
+// to Xilinx devices or technologies. Use with non-Xilinx
+// devices or technologies is expressly prohibited and
+// immediately terminates your license unless covered by
+// a separate agreement.
+//
+// Xilinx is providing this design, code, or information
+// "as-is" solely for use in developing programs and
+// solutions for Xilinx devices, with no obligation on the
+// part of Xilinx to provide support. By providing this design,
+// code, or information as one possible implementation of
+// this feature, application or standard, Xilinx is making no
+// representation that this implementation is free from any
+// claims of infringement. You are responsible for
+// obtaining any rights you may require for your implementation.
+// Xilinx expressly disclaims any warranty whatsoever with
+// respect to the adequacy of the implementation, including
+// but not limited to any warranties or representations that this
+// implementation is free from claims of infringement, implied
+// warranties of merchantability or fitness for a particular
+// purpose.
+//
+// Xilinx products are not intended for use in life support
+// appliances, devices, or systems. Use in such applications is
+// expressly prohibited.
+//
+// Any modifications that are made to the Source Code are
+// done at the user�s sole risk and will be unsupported.
+//
+// Copyright (c) 2006-2007 Xilinx, Inc. All rights reserved.
+//
+// This copyright and support notice must be retained as part
+// of this text at all times.
+//*****************************************************************************
+// ____ ____
+// / /\/ /
+// /___/ \ / Vendor: Xilinx
+// \ \ \/ Version: 2.3
+// \ \ Application: MIG
+// / / Filename: ddr2_usr_top.v
+// /___/ /\ Date Last Modified: $Date: 2008/05/08 15:20:47 $
+// \ \ / \ Date Created: Mon Aug 28 2006
+// \___\/\___\
+//
+//Device: Virtex-5
+//Design Name: DDR2
+//Purpose:
+// This module interfaces with the user. The user should provide the data
+// and various commands.
+//Reference:
+//Revision History:
+//*****************************************************************************
+
+`timescale 1ns/1ps
+
+module ddr2_usr_top #
+ (
+ // Following parameters are for 72-bit RDIMM design (for ML561 Reference
+ // board design). Actual values may be different. Actual parameters values
+ // are passed from design top module ddr2_sdram module. Please refer to
+ // the ddr2_sdram module for actual values.
+ parameter BANK_WIDTH = 2,
+ parameter CS_BITS = 0,
+ parameter COL_WIDTH = 10,
+ parameter DQ_WIDTH = 72,
+ parameter DQ_PER_DQS = 8,
+ parameter APPDATA_WIDTH = 144,
+ parameter APPDATA_BURST_LEN = 2,
+ parameter APPDATA_BURST_BITS = 1,
+ parameter ECC_ENABLE = 0,
+ parameter DQS_WIDTH = 9,
+ parameter ROW_WIDTH = 14,
+ parameter EN_SYN = "FALSE"
+ )
+ (
+ input clk0,
+ input clk90,
+ input rst0,
+ //added by xtan
+ input af_clk, //address fifo clk
+ input rb_clk, //read buffer clk
+ input wb_clk, //write buffer clk
+ input af_rst, //address fifo rst
+ input rb_rst, //read buffer rst
+ input wb_rst, //write buffer rst
+ output rb_full, //read buffer is full
+ //end of add
+ input [DQ_WIDTH-1:0] rd_data_in_rise,
+ input [DQ_WIDTH-1:0] rd_data_in_fall,
+ input [DQS_WIDTH-1:0] phy_calib_rden,
+ input [DQS_WIDTH-1:0] phy_calib_rden_sel,
+ output rd_data_valid,
+ input rd_data_rden,
+ output [APPDATA_WIDTH-1:0] rd_data_fifo_out,
+ input [2:0] app_af_cmd,
+ input [30:0] app_af_addr,
+ input app_af_wren,
+ input ctrl_af_rden,
+ output [2:0] af_cmd,
+ output [30:0] af_addr,
+ output af_empty,
+ output app_af_afull,
+ output [1:0] rd_ecc_error,
+ input app_wdf_wren,
+ input [APPDATA_WIDTH-1:0] app_wdf_data,
+ input [(APPDATA_WIDTH/8)-1:0] app_wdf_mask_data,
+ input wdf_rden,
+ output app_wdf_afull,
+ output [(2*DQ_WIDTH)-1:0] wdf_data,
+ output [((2*DQ_WIDTH)/8)-1:0] wdf_mask_data,
+ output wr_fifo_clear,
+ input wr_fifo_burst,
+ output rd_fifo_clear
+ );
+
+ wire [(APPDATA_WIDTH/2)-1:0] i_rd_data_fifo_out_fall;
+ wire [(APPDATA_WIDTH/2)-1:0] i_rd_data_fifo_out_rise;
+
+ //***************************************************************************
+
+ assign rd_data_fifo_out = {i_rd_data_fifo_out_fall,
+ i_rd_data_fifo_out_rise};
+
+ // read data de-skew and ECC calculation
+ ddr2_usr_rd #
+ (
+ .DQ_PER_DQS (DQ_PER_DQS),
+ .ECC_ENABLE (ECC_ENABLE),
+ .APPDATA_WIDTH (APPDATA_WIDTH),
+ .APPDATA_BURST_LEN( APPDATA_BURST_LEN),
+ .APPDATA_BURST_BITS(APPDATA_BURST_BITS),
+ .DQS_WIDTH (DQS_WIDTH),
+ .EN_SYN (EN_SYN)
+ )
+ u_usr_rd
+ (
+ .clk0 (clk0),
+ .rst0 (rst0),
+ .rb_clk (rb_clk),
+ .rb_rst (rb_rst),
+ .rb_full (rb_full),
+ .rd_data_in_rise (rd_data_in_rise),
+ .rd_data_in_fall (rd_data_in_fall),
+ .rd_ecc_error (rd_ecc_error),
+ .ctrl_rden (phy_calib_rden),
+ .ctrl_rden_sel (phy_calib_rden_sel),
+ .rd_data_valid (rd_data_valid),
+ .rd_data_rden (rd_data_rden),
+ .rd_data_out_rise (i_rd_data_fifo_out_rise),
+ .rd_data_out_fall (i_rd_data_fifo_out_fall),
+ .rd_fifo_clear (rd_fifo_clear)
+ );
+
+ // Command/Addres FIFO
+ ddr2_usr_addr_fifo #
+ (
+ .BANK_WIDTH (BANK_WIDTH),
+ .COL_WIDTH (COL_WIDTH),
+ .CS_BITS (CS_BITS),
+ .ROW_WIDTH (ROW_WIDTH),
+ .EN_SYN (EN_SYN)
+ )
+ u_usr_addr_fifo
+ (
+ .clk0 (clk0),
+ .af_clk (af_clk),
+ .af_rst (af_rst),
+ .rst0 (rst0),
+ .app_af_cmd (app_af_cmd),
+ .app_af_addr (app_af_addr),
+ .app_af_wren (app_af_wren),
+ .ctrl_af_rden (ctrl_af_rden),
+ .af_cmd (af_cmd),
+ .af_addr (af_addr),
+ .af_empty (af_empty),
+ .app_af_afull (app_af_afull)
+ );
+
+ ddr2_usr_wr #
+ (
+ .BANK_WIDTH (BANK_WIDTH),
+ .COL_WIDTH (COL_WIDTH),
+ .CS_BITS (CS_BITS),
+ .DQ_WIDTH (DQ_WIDTH),
+ .APPDATA_WIDTH (APPDATA_WIDTH),
+ .APPDATA_BURST_LEN(APPDATA_BURST_LEN),
+ .APPDATA_BURST_BITS(APPDATA_BURST_BITS),
+ .ECC_ENABLE (ECC_ENABLE),
+ .ROW_WIDTH (ROW_WIDTH)
+ )
+ u_usr_wr
+ (
+ .clk0 (clk0),
+ .wb_clk (wb_clk),
+ .wb_rst (wb_rst),
+ .clk90 (clk90),
+ .rst0 (rst0),
+ .app_wdf_wren (app_wdf_wren),
+ .app_wdf_data (app_wdf_data),
+ .app_wdf_mask_data (app_wdf_mask_data),
+ .wdf_rden (wdf_rden),
+ .app_wdf_afull (app_wdf_afull),
+ .wdf_data (wdf_data),
+ .wdf_mask_data (wdf_mask_data),
+ .wr_fifo_clear (wr_fifo_clear),
+ .wr_fifo_burst (wr_fifo_burst)
+ );
+
+endmodule
\ No newline at end of file
--- /dev/null
+//*****************************************************************************
+// DISCLAIMER OF LIABILITY
+//
+// This text/file contains proprietary, confidential
+// information of Xilinx, Inc., is distributed under license
+// from Xilinx, Inc., and may be used, copied and/or
+// disclosed only pursuant to the terms of a valid license
+// agreement with Xilinx, Inc. Xilinx hereby grants you a
+// license to use this text/file solely for design, simulation,
+// implementation and creation of design files limited
+// to Xilinx devices or technologies. Use with non-Xilinx
+// devices or technologies is expressly prohibited and
+// immediately terminates your license unless covered by
+// a separate agreement.
+//
+// Xilinx is providing this design, code, or information
+// "as-is" solely for use in developing programs and
+// solutions for Xilinx devices, with no obligation on the
+// part of Xilinx to provide support. By providing this design,
+// code, or information as one possible implementation of
+// this feature, application or standard, Xilinx is making no
+// representation that this implementation is free from any
+// claims of infringement. You are responsible for
+// obtaining any rights you may require for your implementation.
+// Xilinx expressly disclaims any warranty whatsoever with
+// respect to the adequacy of the implementation, including
+// but not limited to any warranties or representations that this
+// implementation is free from claims of infringement, implied
+// warranties of merchantability or fitness for a particular
+// purpose.
+//
+// Xilinx products are not intended for use in life support
+// appliances, devices, or systems. Use in such applications is
+// expressly prohibited.
+//
+// Any modifications that are made to the Source Code are
+// done at the user�s sole risk and will be unsupported.
+//
+// Copyright (c) 2006-2007 Xilinx, Inc. All rights reserved.
+//
+// This copyright and support notice must be retained as part
+// of this text at all times.
+//*****************************************************************************
+// ____ ____
+// / /\/ /
+// /___/ \ / Vendor: Xilinx
+// \ \ \/ Version: 2.3
+// \ \ Application: MIG
+// / / Filename: ddr2_usr_wr.v
+// /___/ /\ Date Last Modified: $Date: 2008/05/08 15:20:47 $
+// \ \ / \ Date Created: Mon Aug 28 2006
+// \___\/\___\
+//
+//Device: Virtex-5
+//Design Name: DDR/DDR2
+//Purpose:
+// This module instantiates the modules containing internal FIFOs
+//Reference:
+//Revision History:
+//*****************************************************************************
+
+`timescale 1ns/1ps
+
+module ddr2_usr_wr #
+ (
+ // Following parameters are for 72-bit RDIMM design (for ML561 Reference
+ // board design). Actual values may be different. Actual parameters values
+ // are passed from design top module ddr2_sdram module. Please refer to
+ // the ddr2_sdram module for actual values.
+ parameter BANK_WIDTH = 2,
+ parameter COL_WIDTH = 10,
+ parameter CS_BITS = 0,
+ parameter DQ_WIDTH = 72,
+ parameter APPDATA_WIDTH = 144,
+ parameter APPDATA_BURST_LEN = 2,
+ parameter APPDATA_BURST_BITS = 1,
+ parameter ECC_ENABLE = 0,
+ parameter ROW_WIDTH = 14
+ )
+ (
+ input clk0, //write buffer phy clock
+ input clk90,
+ input rst0,
+ // start of changes xtan & gdgib
+ input wb_clk, //write buffer user clock
+ input wb_rst, //write buffer user reset
+ //end of changes
+ // Write data FIFO interface
+ input app_wdf_wren,
+ input [APPDATA_WIDTH-1:0] app_wdf_data,
+ input [(APPDATA_WIDTH/8)-1:0] app_wdf_mask_data,
+ input wdf_rden,
+ output app_wdf_afull,
+ output [(2*DQ_WIDTH)-1:0] wdf_data,
+ output [((2*DQ_WIDTH)/8)-1:0] wdf_mask_data,
+ output wr_fifo_clear,
+ input wr_fifo_burst
+ );
+
+ // determine number of FIFO72's to use based on data width
+ // round up to next integer value when determining WDF_FIFO_NUM
+ localparam WDF_FIFO_NUM = (ECC_ENABLE) ? (APPDATA_WIDTH+63)/64 :
+ ((2*DQ_WIDTH)+63)/64;
+ // MASK_WIDTH = number of bytes in data bus
+ localparam MASK_WIDTH = DQ_WIDTH/8;
+
+ wire [WDF_FIFO_NUM-1:0] i_wdf_afull;
+ wire [DQ_WIDTH-1:0] i_wdf_data_fall_in;
+ wire [DQ_WIDTH-1:0] i_wdf_data_fall_out;
+ wire [(64*WDF_FIFO_NUM)-1:0] i_wdf_data_in;
+ wire [(64*WDF_FIFO_NUM)-1:0] i_wdf_data_out;
+ wire [DQ_WIDTH-1:0] i_wdf_data_rise_in;
+ wire [DQ_WIDTH-1:0] i_wdf_data_rise_out;
+ wire [MASK_WIDTH-1:0] i_wdf_mask_data_fall_in;
+ wire [MASK_WIDTH-1:0] i_wdf_mask_data_fall_out;
+ wire [(8*WDF_FIFO_NUM)-1:0] i_wdf_mask_data_in;
+ wire [(8*WDF_FIFO_NUM)-1:0] i_wdf_mask_data_out;
+ wire [MASK_WIDTH-1:0] i_wdf_mask_data_rise_in;
+ wire [MASK_WIDTH-1:0] i_wdf_mask_data_rise_out;
+ reg rst_r;
+
+ // ECC signals
+ wire [(2*DQ_WIDTH)-1:0] i_wdf_data_out_ecc;
+ wire [((2*DQ_WIDTH)/8)-1:0] i_wdf_mask_data_out_ecc;
+ wire [63:0] i_wdf_mask_data_out_ecc_wire;
+ wire [((2*DQ_WIDTH)/8)-1:0] mask_data_in_ecc;
+ wire [63:0] mask_data_in_ecc_wire;
+
+ //***************************************************************************
+
+ reg [APPDATA_BURST_BITS-1:0] blfifo_writecount;
+ wire blfifo_writeterminal;
+ wire blfifo_write;
+ wire blfifo_empty, blfifo_full;
+
+ // Doesn't NEED to be async for now, but will need to be if we add async data writes....
+ asyncfifo_dmem_1b blfifo (
+ .din(1'b0),
+ .rd_clk(clk0),
+ .rd_en(wr_fifo_burst),
+ .rst(rst_r | wb_rst),
+ .wr_clk(wb_clk),
+ .wr_en(blfifo_write),
+ .dout(),
+ .empty(blfifo_empty),
+ .full(blfifo_full));
+ assign wr_fifo_clear = ~blfifo_empty;
+
+ always @ (posedge wb_clk) begin
+ if (wb_rst) blfifo_writecount <= 0;
+ else if (app_wdf_wren & ~blfifo_full) begin
+ if (blfifo_writeterminal) blfifo_writecount <= 0;
+ else blfifo_writecount <= blfifo_writecount + 1;
+ end
+ end
+
+ assign blfifo_writeterminal = (blfifo_writecount == (APPDATA_BURST_LEN - 1));
+ assign blfifo_write = blfifo_writeterminal & app_wdf_wren & ~blfifo_full;
+
+ //***************************************************************************
+
+ assign app_wdf_afull = i_wdf_afull[0] | blfifo_full;
+
+ always @(posedge clk0 )
+ rst_r <= rst0;
+
+ genvar wdf_di_i;
+ genvar wdf_do_i;
+ genvar mask_i;
+ genvar wdf_i;
+ generate
+ if(ECC_ENABLE) begin // ECC code
+
+ assign wdf_data = i_wdf_data_out_ecc;
+
+ // the byte 9 dm is always held to 0
+ assign wdf_mask_data = i_wdf_mask_data_out_ecc;
+
+
+
+ // generate for write data fifo .
+ for (wdf_i = 0; wdf_i < WDF_FIFO_NUM; wdf_i = wdf_i + 1) begin: gen_wdf
+
+ FIFO36_72 #
+ (
+ .ALMOST_EMPTY_OFFSET (9'h007),
+ .ALMOST_FULL_OFFSET (9'h00F),
+ .DO_REG (1), // extra CC output delay
+ .EN_ECC_WRITE ("TRUE"),
+ .EN_ECC_READ ("FALSE"),
+ .EN_SYN ("FALSE"),
+ .FIRST_WORD_FALL_THROUGH ("FALSE")
+ )
+ u_wdf_ecc
+ (
+ .ALMOSTEMPTY (),
+ .ALMOSTFULL (i_wdf_afull[wdf_i]),
+ .DBITERR (),
+ .DO (i_wdf_data_out_ecc[((64*(wdf_i+1))+(wdf_i *8))-1:
+ (64*wdf_i)+(wdf_i *8)]),
+ .DOP (i_wdf_data_out_ecc[(72*(wdf_i+1))-1:
+ (64*(wdf_i+1))+ (8*wdf_i) ]),
+ .ECCPARITY (),
+ .EMPTY (),
+ .FULL (),
+ .RDCOUNT (),
+ .RDERR (),
+ .SBITERR (),
+ .WRCOUNT (),
+ .WRERR (),
+ .DI (app_wdf_data[(64*(wdf_i+1))-1:
+ (64*wdf_i)]),
+ .DIP (),
+ .RDCLK (clk90),
+ .RDEN (wdf_rden),
+ .RST (rst_r | wb_rst), // or can use rst0
+ .WRCLK (wb_clk), // xtan: clk0 -> wb_clk
+ .WREN (app_wdf_wren & ~blfifo_full)
+ );
+ end
+
+ // remapping the mask data. The mask data from user i/f does not have
+ // the mask for the ECC byte. Assigning 0 to the ECC mask byte.
+ for (mask_i = 0; mask_i < (DQ_WIDTH)/36;
+ mask_i = mask_i +1) begin: gen_mask
+ assign mask_data_in_ecc[((8*(mask_i+1))+ mask_i)-1:((8*mask_i)+mask_i)]
+ = app_wdf_mask_data[(8*(mask_i+1))-1:8*(mask_i)] ;
+ assign mask_data_in_ecc[((8*(mask_i+1))+mask_i)] = 1'd0;
+ end
+
+ // assign ecc bits to temp variables to avoid
+ // sim warnings. Not all the 64 bits of the fifo
+ // are used in ECC mode.
+ assign mask_data_in_ecc_wire[((2*DQ_WIDTH)/8)-1:0] = mask_data_in_ecc;
+ assign mask_data_in_ecc_wire[63:((2*DQ_WIDTH)/8)] =
+ {(64-((2*DQ_WIDTH)/8)){1'b0}};
+ assign i_wdf_mask_data_out_ecc =
+ i_wdf_mask_data_out_ecc_wire[((2*DQ_WIDTH)/8)-1:0];
+
+
+ FIFO36_72 #
+ (
+ .ALMOST_EMPTY_OFFSET (9'h007),
+ .ALMOST_FULL_OFFSET (9'h00F),
+ .DO_REG (1), // extra CC output delay
+ .EN_ECC_WRITE ("TRUE"),
+ .EN_ECC_READ ("FALSE"),
+ .EN_SYN ("FALSE"),
+ .FIRST_WORD_FALL_THROUGH ("FALSE")
+ )
+ u_wdf_ecc_mask
+ (
+ .ALMOSTEMPTY (),
+ .ALMOSTFULL (),
+ .DBITERR (),
+ .DO (i_wdf_mask_data_out_ecc_wire),
+ .DOP (),
+ .ECCPARITY (),
+ .EMPTY (),
+ .FULL (),
+ .RDCOUNT (),
+ .RDERR (),
+ .SBITERR (),
+ .WRCOUNT (),
+ .WRERR (),
+ .DI (mask_data_in_ecc_wire),
+ .DIP (),
+ .RDCLK (clk90),
+ .RDEN (wdf_rden),
+ .RST (rst_r | wb_rst), // or can use rst0
+ .WRCLK (wb_clk), // xtan: clk0->wb_clk
+ .WREN (app_wdf_wren & ~blfifo_full)
+ );
+ end else begin
+
+ //***********************************************************************
+
+ // Define intermediate buses:
+ assign i_wdf_data_rise_in
+ = app_wdf_data[DQ_WIDTH-1:0];
+ assign i_wdf_data_fall_in
+ = app_wdf_data[(2*DQ_WIDTH)-1:DQ_WIDTH];
+ assign i_wdf_mask_data_rise_in
+ = app_wdf_mask_data[MASK_WIDTH-1:0];
+ assign i_wdf_mask_data_fall_in
+ = app_wdf_mask_data[(2*MASK_WIDTH)-1:MASK_WIDTH];
+
+ //***********************************************************************
+ // Write data FIFO Input:
+ // Arrange DQ's so that the rise data and fall data are interleaved.
+ // the data arrives at the input of the wdf fifo as {fall,rise}.
+ // It is remapped as:
+ // {...fall[15:8],rise[15:8],fall[7:0],rise[7:0]}
+ // This is done to avoid having separate fifo's for rise and fall data
+ // and to keep rise/fall data for the same DQ's on same FIFO
+ // Data masks are interleaved in a similar manner
+ // NOTE: Initialization data from PHY_INIT module does not need to be
+ // interleaved - it's already in the correct format - and the same
+ // initialization pattern from PHY_INIT is sent to all write FIFOs
+ //***********************************************************************
+
+ for (wdf_di_i = 0; wdf_di_i < MASK_WIDTH;
+ wdf_di_i = wdf_di_i + 1) begin: gen_wdf_data_in
+ assign i_wdf_data_in[(16*wdf_di_i)+15:(16*wdf_di_i)]
+ = {i_wdf_data_fall_in[(8*wdf_di_i)+7:(8*wdf_di_i)],
+ i_wdf_data_rise_in[(8*wdf_di_i)+7:(8*wdf_di_i)]};
+ assign i_wdf_mask_data_in[(2*wdf_di_i)+1:(2*wdf_di_i)]
+ = {i_wdf_mask_data_fall_in[wdf_di_i],
+ i_wdf_mask_data_rise_in[wdf_di_i]};
+ end
+
+ //***********************************************************************
+ // Write data FIFO Output:
+ // FIFO DQ and mask outputs must be untangled and put in the standard
+ // format of {fall,rise}. Same goes for mask output
+ //***********************************************************************
+
+ for (wdf_do_i = 0; wdf_do_i < MASK_WIDTH;
+ wdf_do_i = wdf_do_i + 1) begin: gen_wdf_data_out
+ assign i_wdf_data_rise_out[(8*wdf_do_i)+7:(8*wdf_do_i)]
+ = i_wdf_data_out[(16*wdf_do_i)+7:(16*wdf_do_i)];
+ assign i_wdf_data_fall_out[(8*wdf_do_i)+7:(8*wdf_do_i)]
+ = i_wdf_data_out[(16*wdf_do_i)+15:(16*wdf_do_i)+8];
+ assign i_wdf_mask_data_rise_out[wdf_do_i]
+ = i_wdf_mask_data_out[2*wdf_do_i];
+ assign i_wdf_mask_data_fall_out[wdf_do_i]
+ = i_wdf_mask_data_out[(2*wdf_do_i)+1];
+ end
+
+ assign wdf_data = {i_wdf_data_fall_out,
+ i_wdf_data_rise_out};
+
+ assign wdf_mask_data = {i_wdf_mask_data_fall_out,
+ i_wdf_mask_data_rise_out};
+
+ //***********************************************************************
+
+ for (wdf_i = 0; wdf_i < WDF_FIFO_NUM; wdf_i = wdf_i + 1) begin: gen_wdf
+
+ FIFO36_72 #
+ (
+ .ALMOST_EMPTY_OFFSET (9'h007),
+ .ALMOST_FULL_OFFSET (9'h00F),
+ .DO_REG (1), // extra CC output delay
+ .EN_ECC_WRITE ("FALSE"),
+ .EN_ECC_READ ("FALSE"),
+ .EN_SYN ("FALSE"),
+ .FIRST_WORD_FALL_THROUGH ("FALSE")
+ )
+ u_wdf
+ (
+ .ALMOSTEMPTY (),
+ .ALMOSTFULL (i_wdf_afull[wdf_i]),
+ .DBITERR (),
+ .DO (i_wdf_data_out[(64*(wdf_i+1))-1:64*wdf_i]),
+ .DOP (i_wdf_mask_data_out[(8*(wdf_i+1))-1:8*wdf_i]),
+ .ECCPARITY (),
+ .EMPTY (),
+ .FULL (),
+ .RDCOUNT (),
+ .RDERR (),
+ .SBITERR (),
+ .WRCOUNT (),
+ .WRERR (),
+ .DI (i_wdf_data_in[(64*(wdf_i+1))-1:64*wdf_i]),
+ .DIP (i_wdf_mask_data_in[(8*(wdf_i+1))-1:8*wdf_i]),
+ .RDCLK (clk90),
+ .RDEN (wdf_rden),
+ .RST (rst_r | wb_rst), // or can use rst0
+ .WRCLK (wb_clk), // xtan: clk0 -> wb_clk
+ .WREN (app_wdf_wren & ~blfifo_full)
+ );
+ end
+ end
+ endgenerate
+
+endmodule
--- /dev/null
+## Clock, Reset ##############################################################################
+
+Net clk_pin LOC=J16;
+Net clk_pin IOSTANDARD = LVCMOS25;
+
+Net rst_pin LOC=H7;
+Net rst_pin PULLUP;
+Net rst_pin IOSTANDARD = LVCMOS33;
+
+Net clk_pin TNM_NET = clk_pin;
+TIMESPEC TS_clk_pin = PERIOD clk_pin 10 ns HIGH 50%;
+
+Net clk_unbuffered TNM_NET = clk_unbuffered;
+TIMESPEC TS_clk_unbuffered = PERIOD clk_unbuffered 20 ns;
+
+Net rst_pin TIG;
+
+## UART ##############################################################################
+
+#Net uart_cts LOC=G6;
+#Net uart_cts IOSTANDARD = LVCMOS33;
+#Net uart_cts TIG;
+
+#Net uart_rts LOC=F6;
+#Net uart_rts IOSTANDARD = LVCMOS33;
+#Net uart_rts TIG;
+
+Net uart_in LOC=E6;
+Net uart_in IOSTANDARD = LVCMOS33;
+Net uart_in TIG;
+Net uart_in PULLUP;
+
+Net uart_out LOC=D6;
+Net uart_out IOSTANDARD = LVCMOS33;
+Net uart_out TIG;
+Net uart_out PULLUP;
+
+## VGA ##############################################################################
+
+net "vga_hsync" loc = f9;
+net "vga_hsync" slew = slow;
+net "vga_hsync" drive = 2;
+
+net "vga_vsync" loc = h10;
+net "vga_vsync" slew = slow;
+net "vga_vsync" drive = 2;
+
+net "vga_clkout" loc ="c12";
+net "vga_clkout" slew = fast;
+net "vga_clkout" drive = 8;
+
+net "vga_r<7>" loc ="h8";
+net "vga_r<6>" loc ="c5";
+net "vga_r<5>" loc ="h9";
+net "vga_r<4>" loc ="g12";
+net "vga_r<3>" loc ="g11";
+net "vga_r<2>" loc ="g10";
+net "vga_r<1>" loc ="f11";
+net "vga_r<0>" loc ="f10";
+net "vga_r<*>" slew = slow;
+net "vga_r<*>" drive = 2;
+
+net "vga_g<7>" loc ="d5";
+net "vga_g<6>" loc ="d4";
+net "vga_g<5>" loc ="f8";
+net "vga_g<4>" loc ="e13";
+net "vga_g<3>" loc ="e12";
+net "vga_g<2>" loc ="e11";
+net "vga_g<1>" loc ="e9";
+net "vga_g<0>" loc ="e8";
+net "vga_g<*>" slew = slow;
+net "vga_g<*>" drive = 2;
+
+net "vga_b<7>" loc ="c4";
+net "vga_b<6>" loc ="c3";
+net "vga_b<5>" loc ="d12";
+net "vga_b<4>" loc ="d11";
+net "vga_b<3>" loc ="d10";
+net "vga_b<2>" loc ="d9";
+net "vga_b<1>" loc ="c13";
+net "vga_b<0>" loc ="g8";
+net "vga_b<*>" slew = slow;
+net "vga_b<*>" drive = 2;
+
+net "vga_*" iostandard = lvcmos33;
+
+## DRAM ##############################################################################
+
+NET "clk_pin" TNM="SYS_CLK";
+#NET "*/*/clkgen/write_clk_u" TNM="WRITE_CLK";
+#NET "*/*/clkgen/write_clk90_u" TNM="WRITE_CLK";
+#NET "*/*/clkgen/read_clk_u" TNM="READ_CLK";
+#TIMESPEC "TS_SYS_DDRREAD"=FROM "SYS_CLK" TO "WRITE_CLK" TIG;
+#TIMESPEC "TS_DDRREAD_SYS"=FROM "WRITE_CLK" TO "SYS_CLK" TIG;
+#TIMESPEC "TS_SYS_DDRWRITE"=FROM "SYS_CLK" TO "READ_CLK" TIG;
+#TIMESPEC "TS_DDRWRITE_SYS"=FROM "READ_CLK" TO "SYS_CLK" TIG;
+#TIMESPEC "TS_DDRREAD_DDRWRITE"=FROM "READ_CLK" TO "WRITE_CLK" TIG;
+#TIMESPEC "TS_DDRWRITE_DDRREAD"=FROM "WRITE_CLK" TO "READ_CLK" TIG;
+
+Net ddr1_Addr_pin<12> LOC=J24;
+Net ddr1_Addr_pin<12> IOSTANDARD = SSTL2_I;
+Net ddr1_Addr_pin<11> LOC=K26;
+Net ddr1_Addr_pin<11> IOSTANDARD = SSTL2_I;
+Net ddr1_Addr_pin<10> LOC=K24;
+Net ddr1_Addr_pin<10> IOSTANDARD = SSTL2_I;
+Net ddr1_Addr_pin<9> LOC=K23;
+Net ddr1_Addr_pin<9> IOSTANDARD = SSTL2_I;
+Net ddr1_Addr_pin<8> LOC=L26;
+Net ddr1_Addr_pin<8> IOSTANDARD = SSTL2_I;
+Net ddr1_Addr_pin<7> LOC=L25;
+Net ddr1_Addr_pin<7> IOSTANDARD = SSTL2_I;
+Net ddr1_Addr_pin<6> LOC=L24;
+Net ddr1_Addr_pin<6> IOSTANDARD = SSTL2_I;
+Net ddr1_Addr_pin<5> LOC=M23;
+Net ddr1_Addr_pin<5> IOSTANDARD = SSTL2_I;
+Net ddr1_Addr_pin<4> LOC=N24;
+Net ddr1_Addr_pin<4> IOSTANDARD = SSTL2_I;
+Net ddr1_Addr_pin<3> LOC=N23;
+Net ddr1_Addr_pin<3> IOSTANDARD = SSTL2_I;
+Net ddr1_Addr_pin<2> LOC=N22;
+Net ddr1_Addr_pin<2> IOSTANDARD = SSTL2_I;
+Net ddr1_Addr_pin<1> LOC=P22;
+Net ddr1_Addr_pin<1> IOSTANDARD = SSTL2_I;
+Net ddr1_Addr_pin<0> LOC=P24;
+Net ddr1_Addr_pin<0> IOSTANDARD = SSTL2_I;
+Net ddr1_BankAddr_pin<1> LOC=J26;
+Net ddr1_BankAddr_pin<1> IOSTANDARD = SSTL2_I;
+Net ddr1_BankAddr_pin<0> LOC=J25;
+Net ddr1_BankAddr_pin<0> IOSTANDARD = SSTL2_I;
+Net ddr1_CAS_n_pin LOC=D26;
+Net ddr1_CAS_n_pin IOSTANDARD = SSTL2_I;
+Net ddr1_CE_pin LOC=H14;
+Net ddr1_CE_pin IOSTANDARD = SSTL2_I;
+Net ddr1_CS_n_pin LOC=C27;
+Net ddr1_CS_n_pin IOSTANDARD = SSTL2_I;
+Net ddr1_RAS_n_pin LOC=D27;
+Net ddr1_RAS_n_pin IOSTANDARD = SSTL2_I;
+Net ddr1_WE_n_pin LOC=E27;
+Net ddr1_WE_n_pin IOSTANDARD = SSTL2_I;
+Net ddr1_DM_pin<0> LOC=F21;
+Net ddr1_DM_pin<0> IOSTANDARD = SSTL2_II;
+Net ddr1_DM_pin<1> LOC=G22;
+Net ddr1_DM_pin<1> IOSTANDARD = SSTL2_II;
+Net ddr1_DM_pin<2> LOC=E23;
+Net ddr1_DM_pin<2> IOSTANDARD = SSTL2_II;
+Net ddr1_DM_pin<3> LOC=G23;
+Net ddr1_DM_pin<3> IOSTANDARD = SSTL2_II;
+Net ddr1_DQS<0> LOC=F20;
+Net ddr1_DQS<0> IOSTANDARD = SSTL2_II;
+Net ddr1_DQS<1> LOC=G20;
+Net ddr1_DQS<1> IOSTANDARD = SSTL2_II;
+Net ddr1_DQS<2> LOC=G25;
+Net ddr1_DQS<2> IOSTANDARD = SSTL2_II;
+Net ddr1_DQS<3> LOC=F25;
+Net ddr1_DQS<3> IOSTANDARD = SSTL2_II;
+Net ddr1_DQ<0> LOC=E17;
+Net ddr1_DQ<0> IOSTANDARD = SSTL2_II;
+Net ddr1_DQ<1> LOC=E18;
+Net ddr1_DQ<1> IOSTANDARD = SSTL2_II;
+Net ddr1_DQ<2> LOC=F18;
+Net ddr1_DQ<2> IOSTANDARD = SSTL2_II;
+Net ddr1_DQ<3> LOC=G18;
+Net ddr1_DQ<3> IOSTANDARD = SSTL2_II;
+Net ddr1_DQ<4> LOC=F19;
+Net ddr1_DQ<4> IOSTANDARD = SSTL2_II;
+Net ddr1_DQ<5> LOC=E19;
+Net ddr1_DQ<5> IOSTANDARD = SSTL2_II;
+Net ddr1_DQ<6> LOC=D21;
+Net ddr1_DQ<6> IOSTANDARD = SSTL2_II;
+Net ddr1_DQ<7> LOC=E21;
+Net ddr1_DQ<7> IOSTANDARD = SSTL2_II;
+Net ddr1_DQ<8> LOC=G21;
+Net ddr1_DQ<8> IOSTANDARD = SSTL2_II;
+Net ddr1_DQ<9> LOC=H20;
+Net ddr1_DQ<9> IOSTANDARD = SSTL2_II;
+Net ddr1_DQ<10> LOC=J20;
+Net ddr1_DQ<10> IOSTANDARD = SSTL2_II;
+Net ddr1_DQ<11> LOC=J21;
+Net ddr1_DQ<11> IOSTANDARD = SSTL2_II;
+Net ddr1_DQ<12> LOC=K21;
+Net ddr1_DQ<12> IOSTANDARD = SSTL2_II;
+Net ddr1_DQ<13> LOC=L21;
+Net ddr1_DQ<13> IOSTANDARD = SSTL2_II;
+Net ddr1_DQ<14> LOC=J22;
+Net ddr1_DQ<14> IOSTANDARD = SSTL2_II;
+Net ddr1_DQ<15> LOC=H22;
+Net ddr1_DQ<15> IOSTANDARD = SSTL2_II;
+Net ddr1_DQ<16> LOC=C22;
+Net ddr1_DQ<16> IOSTANDARD = SSTL2_II;
+Net ddr1_DQ<17> LOC=C23;
+Net ddr1_DQ<17> IOSTANDARD = SSTL2_II;
+Net ddr1_DQ<18> LOC=C24;
+Net ddr1_DQ<18> IOSTANDARD = SSTL2_II;
+Net ddr1_DQ<19> LOC=C25;
+Net ddr1_DQ<19> IOSTANDARD = SSTL2_II;
+Net ddr1_DQ<20> LOC=D22;
+Net ddr1_DQ<20> IOSTANDARD = SSTL2_II;
+Net ddr1_DQ<21> LOC=D24;
+Net ddr1_DQ<21> IOSTANDARD = SSTL2_II;
+Net ddr1_DQ<22> LOC=D25;
+Net ddr1_DQ<22> IOSTANDARD = SSTL2_II;
+Net ddr1_DQ<23> LOC=C28;
+Net ddr1_DQ<23> IOSTANDARD = SSTL2_II;
+Net ddr1_DQ<24> LOC=F23;
+Net ddr1_DQ<24> IOSTANDARD = SSTL2_II;
+Net ddr1_DQ<25> LOC=F24;
+Net ddr1_DQ<25> IOSTANDARD = SSTL2_II;
+Net ddr1_DQ<26> LOC=F26;
+Net ddr1_DQ<26> IOSTANDARD = SSTL2_II;
+Net ddr1_DQ<27> LOC=G26;
+Net ddr1_DQ<27> IOSTANDARD = SSTL2_II;
+Net ddr1_DQ<28> LOC=H25;
+Net ddr1_DQ<28> IOSTANDARD = SSTL2_II;
+Net ddr1_DQ<29> LOC=H24;
+Net ddr1_DQ<29> IOSTANDARD = SSTL2_II;
+Net ddr1_DQ<30> LOC=E24;
+Net ddr1_DQ<30> IOSTANDARD = SSTL2_II;
+Net ddr1_DQ<31> LOC=E22;
+Net ddr1_DQ<31> IOSTANDARD = SSTL2_II;
+Net ddr1_Clk_pin LOC=F28;
+Net ddr1_Clk_pin IOSTANDARD = SSTL2_II;
+Net ddr1_Clk_n_pin LOC=E28;
+Net ddr1_Clk_n_pin IOSTANDARD = SSTL2_II;
--- /dev/null
+## Clock, Reset ##############################################################################
+
+Net clk_pin LOC=AH15;
+#Net clk_pin IOSTANDARD = LVCMOS25;
+
+#Net rst_pin LOC=H7;
+#Net rst_pin PULLUP;
+#Net rst_pin IOSTANDARD = LVCMOS33;
+
+Net clk_pin TNM_NET = clk_pin;
+TIMESPEC TS_clk_pin = PERIOD clk_pin 10 ns HIGH 50%;
+
+Net clk_unbuffered TNM_NET = clk_unbuffered;
+TIMESPEC TS_clk_unbuffered = PERIOD clk_unbuffered 20 ns;
+
+Net rst_pin TIG;
+
+## UART ##############################################################################
+
+#Net uart_cts LOC=G6;
+#Net uart_cts IOSTANDARD = LVCMOS33;
+#Net uart_cts TIG;
+
+#Net uart_rts LOC=F6;
+#Net uart_rts IOSTANDARD = LVCMOS33;
+#Net uart_rts TIG;
+
+Net uart_in LOC=AG15;
+#Net uart_in IOSTANDARD = LVCMOS33;
+Net uart_in TIG;
+Net uart_in PULLUP;
+
+Net uart_out LOC=AG20;
+#Net uart_out IOSTANDARD = LVCMOS33;
+Net uart_out TIG;
+Net uart_out PULLUP;
+
+## VGA ##############################################################################
+
+#net "vga_hsync" loc = f9;
+#net "vga_hsync" slew = slow;
+#net "vga_hsync" drive = 2;
+#
+#net "vga_vsync" loc = h10;
+#net "vga_vsync" slew = slow;
+#net "vga_vsync" drive = 2;
+#
+#net "vga_clkout" loc ="c12";
+#net "vga_clkout" slew = fast;
+#net "vga_clkout" drive = 8;
+#
+#net "vga_r<7>" loc ="h8";
+#net "vga_r<6>" loc ="c5";
+#net "vga_r<5>" loc ="h9";
+#net "vga_r<4>" loc ="g12";
+#net "vga_r<3>" loc ="g11";
+#net "vga_r<2>" loc ="g10";
+#net "vga_r<1>" loc ="f11";
+#net "vga_r<0>" loc ="f10";
+#net "vga_r<*>" slew = slow;
+#net "vga_r<*>" drive = 2;
+#
+#net "vga_g<7>" loc ="d5";
+#net "vga_g<6>" loc ="d4";
+#net "vga_g<5>" loc ="f8";
+#net "vga_g<4>" loc ="e13";
+#net "vga_g<3>" loc ="e12";
+#net "vga_g<2>" loc ="e11";
+#net "vga_g<1>" loc ="e9";
+#net "vga_g<0>" loc ="e8";
+#net "vga_g<*>" slew = slow;
+#net "vga_g<*>" drive = 2;
+#
+#net "vga_b<7>" loc ="c4";
+#net "vga_b<6>" loc ="c3";
+#net "vga_b<5>" loc ="d12";
+#net "vga_b<4>" loc ="d11";
+#net "vga_b<3>" loc ="d10";
+#net "vga_b<2>" loc ="d9";
+#net "vga_b<1>" loc ="c13";
+#net "vga_b<0>" loc ="g8";
+#net "vga_b<*>" slew = slow;
+#net "vga_b<*>" drive = 2;
+#
+#net "vga_*" iostandard = lvcmos33;
+#
+### DRAM ##############################################################################
+
+NET "clk_pin" TNM="SYS_CLK";
+#NET "*/*/clkgen/write_clk_u" TNM="WRITE_CLK";
+#NET "*/*/clkgen/write_clk90_u" TNM="WRITE_CLK";
+#NET "*/*/clkgen/read_clk_u" TNM="READ_CLK";
+#TIMESPEC "TS_SYS_DDRREAD"=FROM "SYS_CLK" TO "WRITE_CLK" TIG;
+#TIMESPEC "TS_DDRREAD_SYS"=FROM "WRITE_CLK" TO "SYS_CLK" TIG;
+#TIMESPEC "TS_SYS_DDRWRITE"=FROM "SYS_CLK" TO "READ_CLK" TIG;
+#TIMESPEC "TS_DDRWRITE_SYS"=FROM "READ_CLK" TO "SYS_CLK" TIG;
+#TIMESPEC "TS_DDRREAD_DDRWRITE"=FROM "READ_CLK" TO "WRITE_CLK" TIG;
+#TIMESPEC "TS_DDRWRITE_DDRREAD"=FROM "WRITE_CLK" TO "READ_CLK" TIG;
+
+#Net ddr1_Addr_pin<12> LOC=J24;
+#Net ddr1_Addr_pin<12> IOSTANDARD = SSTL2_I;
+#Net ddr1_Addr_pin<11> LOC=K26;
+#Net ddr1_Addr_pin<11> IOSTANDARD = SSTL2_I;
+#Net ddr1_Addr_pin<10> LOC=K24;
+#Net ddr1_Addr_pin<10> IOSTANDARD = SSTL2_I;
+#Net ddr1_Addr_pin<9> LOC=K23;
+#Net ddr1_Addr_pin<9> IOSTANDARD = SSTL2_I;
+#Net ddr1_Addr_pin<8> LOC=L26;
+#Net ddr1_Addr_pin<8> IOSTANDARD = SSTL2_I;
+#Net ddr1_Addr_pin<7> LOC=L25;
+#Net ddr1_Addr_pin<7> IOSTANDARD = SSTL2_I;
+#Net ddr1_Addr_pin<6> LOC=L24;
+#Net ddr1_Addr_pin<6> IOSTANDARD = SSTL2_I;
+#Net ddr1_Addr_pin<5> LOC=M23;
+#Net ddr1_Addr_pin<5> IOSTANDARD = SSTL2_I;
+#Net ddr1_Addr_pin<4> LOC=N24;
+#Net ddr1_Addr_pin<4> IOSTANDARD = SSTL2_I;
+#Net ddr1_Addr_pin<3> LOC=N23;
+#Net ddr1_Addr_pin<3> IOSTANDARD = SSTL2_I;
+#Net ddr1_Addr_pin<2> LOC=N22;
+#Net ddr1_Addr_pin<2> IOSTANDARD = SSTL2_I;
+#Net ddr1_Addr_pin<1> LOC=P22;
+#Net ddr1_Addr_pin<1> IOSTANDARD = SSTL2_I;
+#Net ddr1_Addr_pin<0> LOC=P24;
+#Net ddr1_Addr_pin<0> IOSTANDARD = SSTL2_I;
+#Net ddr1_BankAddr_pin<1> LOC=J26;
+#Net ddr1_BankAddr_pin<1> IOSTANDARD = SSTL2_I;
+#Net ddr1_BankAddr_pin<0> LOC=J25;
+#Net ddr1_BankAddr_pin<0> IOSTANDARD = SSTL2_I;
+#Net ddr1_CAS_n_pin LOC=D26;
+#Net ddr1_CAS_n_pin IOSTANDARD = SSTL2_I;
+#Net ddr1_CE_pin LOC=H14;
+#Net ddr1_CE_pin IOSTANDARD = SSTL2_I;
+#Net ddr1_CS_n_pin LOC=C27;
+#Net ddr1_CS_n_pin IOSTANDARD = SSTL2_I;
+#Net ddr1_RAS_n_pin LOC=D27;
+#Net ddr1_RAS_n_pin IOSTANDARD = SSTL2_I;
+#Net ddr1_WE_n_pin LOC=E27;
+#Net ddr1_WE_n_pin IOSTANDARD = SSTL2_I;
+#Net ddr1_DM_pin<0> LOC=F21;
+#Net ddr1_DM_pin<0> IOSTANDARD = SSTL2_II;
+#Net ddr1_DM_pin<1> LOC=G22;
+#Net ddr1_DM_pin<1> IOSTANDARD = SSTL2_II;
+#Net ddr1_DM_pin<2> LOC=E23;
+#Net ddr1_DM_pin<2> IOSTANDARD = SSTL2_II;
+#Net ddr1_DM_pin<3> LOC=G23;
+#Net ddr1_DM_pin<3> IOSTANDARD = SSTL2_II;
+#Net ddr1_DQS<0> LOC=F20;
+#Net ddr1_DQS<0> IOSTANDARD = SSTL2_II;
+#Net ddr1_DQS<1> LOC=G20;
+#Net ddr1_DQS<1> IOSTANDARD = SSTL2_II;
+#Net ddr1_DQS<2> LOC=G25;
+#Net ddr1_DQS<2> IOSTANDARD = SSTL2_II;
+#Net ddr1_DQS<3> LOC=F25;
+#Net ddr1_DQS<3> IOSTANDARD = SSTL2_II;
+#Net ddr1_DQ<0> LOC=E17;
+#Net ddr1_DQ<0> IOSTANDARD = SSTL2_II;
+#Net ddr1_DQ<1> LOC=E18;
+#Net ddr1_DQ<1> IOSTANDARD = SSTL2_II;
+#Net ddr1_DQ<2> LOC=F18;
+#Net ddr1_DQ<2> IOSTANDARD = SSTL2_II;
+#Net ddr1_DQ<3> LOC=G18;
+#Net ddr1_DQ<3> IOSTANDARD = SSTL2_II;
+#Net ddr1_DQ<4> LOC=F19;
+#Net ddr1_DQ<4> IOSTANDARD = SSTL2_II;
+#Net ddr1_DQ<5> LOC=E19;
+#Net ddr1_DQ<5> IOSTANDARD = SSTL2_II;
+#Net ddr1_DQ<6> LOC=D21;
+#Net ddr1_DQ<6> IOSTANDARD = SSTL2_II;
+#Net ddr1_DQ<7> LOC=E21;
+#Net ddr1_DQ<7> IOSTANDARD = SSTL2_II;
+#Net ddr1_DQ<8> LOC=G21;
+#Net ddr1_DQ<8> IOSTANDARD = SSTL2_II;
+#Net ddr1_DQ<9> LOC=H20;
+#Net ddr1_DQ<9> IOSTANDARD = SSTL2_II;
+#Net ddr1_DQ<10> LOC=J20;
+#Net ddr1_DQ<10> IOSTANDARD = SSTL2_II;
+#Net ddr1_DQ<11> LOC=J21;
+#Net ddr1_DQ<11> IOSTANDARD = SSTL2_II;
+#Net ddr1_DQ<12> LOC=K21;
+#Net ddr1_DQ<12> IOSTANDARD = SSTL2_II;
+#Net ddr1_DQ<13> LOC=L21;
+#Net ddr1_DQ<13> IOSTANDARD = SSTL2_II;
+#Net ddr1_DQ<14> LOC=J22;
+#Net ddr1_DQ<14> IOSTANDARD = SSTL2_II;
+#Net ddr1_DQ<15> LOC=H22;
+#Net ddr1_DQ<15> IOSTANDARD = SSTL2_II;
+#Net ddr1_DQ<16> LOC=C22;
+#Net ddr1_DQ<16> IOSTANDARD = SSTL2_II;
+#Net ddr1_DQ<17> LOC=C23;
+#Net ddr1_DQ<17> IOSTANDARD = SSTL2_II;
+#Net ddr1_DQ<18> LOC=C24;
+#Net ddr1_DQ<18> IOSTANDARD = SSTL2_II;
+#Net ddr1_DQ<19> LOC=C25;
+#Net ddr1_DQ<19> IOSTANDARD = SSTL2_II;
+#Net ddr1_DQ<20> LOC=D22;
+#Net ddr1_DQ<20> IOSTANDARD = SSTL2_II;
+#Net ddr1_DQ<21> LOC=D24;
+#Net ddr1_DQ<21> IOSTANDARD = SSTL2_II;
+#Net ddr1_DQ<22> LOC=D25;
+#Net ddr1_DQ<22> IOSTANDARD = SSTL2_II;
+#Net ddr1_DQ<23> LOC=C28;
+#Net ddr1_DQ<23> IOSTANDARD = SSTL2_II;
+#Net ddr1_DQ<24> LOC=F23;
+#Net ddr1_DQ<24> IOSTANDARD = SSTL2_II;
+#Net ddr1_DQ<25> LOC=F24;
+#Net ddr1_DQ<25> IOSTANDARD = SSTL2_II;
+#Net ddr1_DQ<26> LOC=F26;
+#Net ddr1_DQ<26> IOSTANDARD = SSTL2_II;
+#Net ddr1_DQ<27> LOC=G26;
+#Net ddr1_DQ<27> IOSTANDARD = SSTL2_II;
+#Net ddr1_DQ<28> LOC=H25;
+#Net ddr1_DQ<28> IOSTANDARD = SSTL2_II;
+#Net ddr1_DQ<29> LOC=H24;
+#Net ddr1_DQ<29> IOSTANDARD = SSTL2_II;
+#Net ddr1_DQ<30> LOC=E24;
+#Net ddr1_DQ<30> IOSTANDARD = SSTL2_II;
+#Net ddr1_DQ<31> LOC=E22;
+#Net ddr1_DQ<31> IOSTANDARD = SSTL2_II;
+#Net ddr1_Clk_pin LOC=F28;
+#Net ddr1_Clk_pin IOSTANDARD = SSTL2_II;
+#Net ddr1_Clk_n_pin LOC=E28;
+#Net ddr1_Clk_n_pin IOSTANDARD = SSTL2_II;
+Net DDR2_CAS_B LOC=E31; Net DDR2_CAS_B IOSTANDARD="SSTL18_II";
+
+Net DDR2_CKE<1> LOC=U30; Net DDR2_CKE<1> IOSTANDARD="SSTL18_II";
+Net DDR2_CKE<0> LOC=T28; Net DDR2_CKE<0> IOSTANDARD="SSTL18_II";
+
+Net DDR2_RAS_B LOC=H30; Net DDR2_RAS_B IOSTANDARD="SSTL18_II";
+
+Net DDR2_WE_B LOC=K29; Net DDR2_WE_B IOSTANDARD="SSTL18_II";
+
+Net DDR2_ODT<1> LOC=F30; Net DDR2_ODT<1> IOSTANDARD="SSTL18_II";
+Net DDR2_ODT<0> LOC=F31; Net DDR2_ODT<0> IOSTANDARD="SSTL18_II";
+
+Net DDR2_CS0_B<1> LOC=J29; Net DDR2_CS0_B<1> IOSTANDARD="SSTL18_II";
+Net DDR2_CS0_B<0> LOC=L29; Net DDR2_CS0_B<0> IOSTANDARD="SSTL18_II";
+
+Net DDR2_CLK_N<1> LOC=F28; Net DDR2_CLK_N<1> IOSTANDARD="DIFF_SSTL18_II";
+Net DDR2_CLK_N<0> LOC=AJ29; Net DDR2_CLK_N<0> IOSTANDARD="DIFF_SSTL18_II";
+
+Net DDR2_CLK_P<1> LOC=E28; Net DDR2_CLK_P<1> IOSTANDARD="DIFF_SSTL18_II";
+Net DDR2_CLK_P<0> LOC=AK29; Net DDR2_CLK_P<0> IOSTANDARD="DIFF_SSTL18_II";
+
+Net DDR2_A<13> LOC=H29; Net DDR2_A<13> IOSTANDARD="SSTL18_II";
+Net DDR2_A<12> LOC=T31; Net DDR2_A<12> IOSTANDARD="SSTL18_II";
+Net DDR2_A<11> LOC=R29; Net DDR2_A<11> IOSTANDARD="SSTL18_II";
+Net DDR2_A<10> LOC=J31; Net DDR2_A<10> IOSTANDARD="SSTL18_II";
+Net DDR2_A<9> LOC=R28; Net DDR2_A<9> IOSTANDARD="SSTL18_II";
+Net DDR2_A<8> LOC=M31; Net DDR2_A<8> IOSTANDARD="SSTL18_II";
+Net DDR2_A<7> LOC=P30; Net DDR2_A<7> IOSTANDARD="SSTL18_II";
+Net DDR2_A<6> LOC=P31; Net DDR2_A<6> IOSTANDARD="SSTL18_II";
+Net DDR2_A<5> LOC=L31; Net DDR2_A<5> IOSTANDARD="SSTL18_II";
+Net DDR2_A<4> LOC=K31; Net DDR2_A<4> IOSTANDARD="SSTL18_II";
+Net DDR2_A<3> LOC=P29; Net DDR2_A<3> IOSTANDARD="SSTL18_II";
+Net DDR2_A<2> LOC=N29; Net DDR2_A<2> IOSTANDARD="SSTL18_II";
+Net DDR2_A<1> LOC=M30; Net DDR2_A<1> IOSTANDARD="SSTL18_II";
+Net DDR2_A<0> LOC=L30; Net DDR2_A<0> IOSTANDARD="SSTL18_II";
+
+Net DDR2_BA<2> LOC=R31; Net DDR2_BA<2> IOSTANDARD="SSTL18_II";
+Net DDR2_BA<1> LOC=J30; Net DDR2_BA<1> IOSTANDARD="SSTL18_II";
+Net DDR2_BA<0> LOC=G31; Net DDR2_BA<0> IOSTANDARD="SSTL18_II";
+
+Net DDR2_DQ<63> LOC=L24; Net DDR2_DQ<63> IOSTANDARD="SSTL18_II_DCI";
+Net DDR2_DQ<62> LOC=L25; Net DDR2_DQ<62> IOSTANDARD="SSTL18_II_DCI";
+Net DDR2_DQ<61> LOC=M25; Net DDR2_DQ<61> IOSTANDARD="SSTL18_II_DCI";
+Net DDR2_DQ<60> LOC=J27; Net DDR2_DQ<60> IOSTANDARD="SSTL18_II_DCI";
+Net DDR2_DQ<59> LOC=L26; Net DDR2_DQ<59> IOSTANDARD="SSTL18_II_DCI";
+Net DDR2_DQ<58> LOC=J24; Net DDR2_DQ<58> IOSTANDARD="SSTL18_II_DCI";
+Net DDR2_DQ<57> LOC=M26; Net DDR2_DQ<57> IOSTANDARD="SSTL18_II_DCI";
+Net DDR2_DQ<56> LOC=G25; Net DDR2_DQ<56> IOSTANDARD="SSTL18_II_DCI";
+Net DDR2_DQ<55> LOC=G26; Net DDR2_DQ<55> IOSTANDARD="SSTL18_II_DCI";
+Net DDR2_DQ<54> LOC=H24; Net DDR2_DQ<54> IOSTANDARD="SSTL18_II_DCI";
+Net DDR2_DQ<53> LOC=K28; Net DDR2_DQ<53> IOSTANDARD="SSTL18_II_DCI";
+Net DDR2_DQ<52> LOC=K27; Net DDR2_DQ<52> IOSTANDARD="SSTL18_II_DCI";
+Net DDR2_DQ<51> LOC=H25; Net DDR2_DQ<51> IOSTANDARD="SSTL18_II_DCI";
+Net DDR2_DQ<50> LOC=F25; Net DDR2_DQ<50> IOSTANDARD="SSTL18_II_DCI";
+Net DDR2_DQ<49> LOC=L28; Net DDR2_DQ<49> IOSTANDARD="SSTL18_II_DCI";
+Net DDR2_DQ<48> LOC=M28; Net DDR2_DQ<48> IOSTANDARD="SSTL18_II_DCI";
+Net DDR2_DQ<47> LOC=N28; Net DDR2_DQ<47> IOSTANDARD="SSTL18_II_DCI";
+Net DDR2_DQ<46> LOC=P27; Net DDR2_DQ<46> IOSTANDARD="SSTL18_II_DCI";
+Net DDR2_DQ<45> LOC=N25; Net DDR2_DQ<45> IOSTANDARD="SSTL18_II_DCI";
+Net DDR2_DQ<44> LOC=T24; Net DDR2_DQ<44> IOSTANDARD="SSTL18_II_DCI";
+Net DDR2_DQ<43> LOC=P26; Net DDR2_DQ<43> IOSTANDARD="SSTL18_II_DCI";
+Net DDR2_DQ<42> LOC=N24; Net DDR2_DQ<42> IOSTANDARD="SSTL18_II_DCI";
+Net DDR2_DQ<41> LOC=P25; Net DDR2_DQ<41> IOSTANDARD="SSTL18_II_DCI";
+Net DDR2_DQ<40> LOC=R24; Net DDR2_DQ<40> IOSTANDARD="SSTL18_II_DCI";
+Net DDR2_DQ<39> LOC=V24; Net DDR2_DQ<39> IOSTANDARD="SSTL18_II_DCI";
+Net DDR2_DQ<38> LOC=W26; Net DDR2_DQ<38> IOSTANDARD="SSTL18_II_DCI";
+Net DDR2_DQ<37> LOC=W25; Net DDR2_DQ<37> IOSTANDARD="SSTL18_II_DCI";
+Net DDR2_DQ<36> LOC=V28; Net DDR2_DQ<36> IOSTANDARD="SSTL18_II_DCI";
+Net DDR2_DQ<35> LOC=W24; Net DDR2_DQ<35> IOSTANDARD="SSTL18_II_DCI";
+Net DDR2_DQ<34> LOC=Y26; Net DDR2_DQ<34> IOSTANDARD="SSTL18_II_DCI";
+Net DDR2_DQ<33> LOC=Y27; Net DDR2_DQ<33> IOSTANDARD="SSTL18_II_DCI";
+Net DDR2_DQ<32> LOC=V29; Net DDR2_DQ<32> IOSTANDARD="SSTL18_II_DCI";
+Net DDR2_DQ<31> LOC=W27; Net DDR2_DQ<31> IOSTANDARD="SSTL18_II_DCI";
+Net DDR2_DQ<30> LOC=V27; Net DDR2_DQ<30> IOSTANDARD="SSTL18_II_DCI";
+Net DDR2_DQ<29> LOC=W29; Net DDR2_DQ<29> IOSTANDARD="SSTL18_II_DCI";
+Net DDR2_DQ<28> LOC=AC30; Net DDR2_DQ<28> IOSTANDARD="SSTL18_II_DCI";
+Net DDR2_DQ<27> LOC=V30; Net DDR2_DQ<27> IOSTANDARD="SSTL18_II_DCI";
+Net DDR2_DQ<26> LOC=W31; Net DDR2_DQ<26> IOSTANDARD="SSTL18_II_DCI";
+Net DDR2_DQ<25> LOC=AB30; Net DDR2_DQ<25> IOSTANDARD="SSTL18_II_DCI";
+Net DDR2_DQ<24> LOC=AC29; Net DDR2_DQ<24> IOSTANDARD="SSTL18_II_DCI";
+Net DDR2_DQ<23> LOC=AA25; Net DDR2_DQ<23> IOSTANDARD="SSTL18_II_DCI";
+Net DDR2_DQ<22> LOC=AB27; Net DDR2_DQ<22> IOSTANDARD="SSTL18_II_DCI";
+Net DDR2_DQ<21> LOC=AA24; Net DDR2_DQ<21> IOSTANDARD="SSTL18_II_DCI";
+Net DDR2_DQ<20> LOC=AB26; Net DDR2_DQ<20> IOSTANDARD="SSTL18_II_DCI";
+Net DDR2_DQ<19> LOC=AA26; Net DDR2_DQ<19> IOSTANDARD="SSTL18_II_DCI";
+Net DDR2_DQ<18> LOC=AC27; Net DDR2_DQ<18> IOSTANDARD="SSTL18_II_DCI";
+Net DDR2_DQ<17> LOC=AB25; Net DDR2_DQ<17> IOSTANDARD="SSTL18_II_DCI";
+Net DDR2_DQ<16> LOC=AC28; Net DDR2_DQ<16> IOSTANDARD="SSTL18_II_DCI";
+Net DDR2_DQ<15> LOC=AB28; Net DDR2_DQ<15> IOSTANDARD="SSTL18_II_DCI";
+Net DDR2_DQ<14> LOC=AG28; Net DDR2_DQ<14> IOSTANDARD="SSTL18_II_DCI";
+Net DDR2_DQ<13> LOC=AJ26; Net DDR2_DQ<13> IOSTANDARD="SSTL18_II_DCI";
+Net DDR2_DQ<12> LOC=AG25; Net DDR2_DQ<12> IOSTANDARD="SSTL18_II_DCI";
+Net DDR2_DQ<11> LOC=AA28; Net DDR2_DQ<11> IOSTANDARD="SSTL18_II_DCI";
+Net DDR2_DQ<10> LOC=AH28; Net DDR2_DQ<10> IOSTANDARD="SSTL18_II_DCI";
+Net DDR2_DQ<9> LOC=AF28; Net DDR2_DQ<9> IOSTANDARD="SSTL18_II_DCI";
+Net DDR2_DQ<8> LOC=AH27; Net DDR2_DQ<8> IOSTANDARD="SSTL18_II_DCI";
+Net DDR2_DQ<7> LOC=AE29; Net DDR2_DQ<7> IOSTANDARD="SSTL18_II_DCI";
+Net DDR2_DQ<6> LOC=AD29; Net DDR2_DQ<6> IOSTANDARD="SSTL18_II_DCI";
+Net DDR2_DQ<5> LOC=AF29; Net DDR2_DQ<5> IOSTANDARD="SSTL18_II_DCI";
+Net DDR2_DQ<4> LOC=AJ30; Net DDR2_DQ<4> IOSTANDARD="SSTL18_II_DCI";
+Net DDR2_DQ<3> LOC=AD30; Net DDR2_DQ<3> IOSTANDARD="SSTL18_II_DCI";
+Net DDR2_DQ<2> LOC=AF31; Net DDR2_DQ<2> IOSTANDARD="SSTL18_II_DCI";
+Net DDR2_DQ<1> LOC=AK31; Net DDR2_DQ<1> IOSTANDARD="SSTL18_II_DCI";
+Net DDR2_DQ<0> LOC=AF30; Net DDR2_DQ<0> IOSTANDARD="SSTL18_II_DCI";
+
+Net DDR2_DM<7> LOC=J25; Net DDR2_DM<7> IOSTANDARD="SSTL18_II";
+Net DDR2_DM<6> LOC=F26; Net DDR2_DM<6> IOSTANDARD="SSTL18_II";
+Net DDR2_DM<5> LOC=P24; Net DDR2_DM<5> IOSTANDARD="SSTL18_II";
+Net DDR2_DM<4> LOC=V25; Net DDR2_DM<4> IOSTANDARD="SSTL18_II";
+Net DDR2_DM<3> LOC=Y31; Net DDR2_DM<3> IOSTANDARD="SSTL18_II";
+Net DDR2_DM<2> LOC=Y24; Net DDR2_DM<2> IOSTANDARD="SSTL18_II";
+Net DDR2_DM<1> LOC=AE28; Net DDR2_DM<1> IOSTANDARD="SSTL18_II";
+Net DDR2_DM<0> LOC=AJ31; Net DDR2_DM<0> IOSTANDARD="SSTL18_II";
+
+Net DDR2_DQS_N<7> LOC=H27; Net DDR2_DQS_N<7> IOSTANDARD="DIFF_SSTL18_II_DCI";
+Net DDR2_DQS_N<6> LOC=G28; Net DDR2_DQS_N<6> IOSTANDARD="DIFF_SSTL18_II_DCI";
+Net DDR2_DQS_N<5> LOC=E27; Net DDR2_DQS_N<5> IOSTANDARD="DIFF_SSTL18_II_DCI";
+Net DDR2_DQS_N<4> LOC=Y29; Net DDR2_DQS_N<4> IOSTANDARD="DIFF_SSTL18_II_DCI";
+Net DDR2_DQS_N<3> LOC=AA31; Net DDR2_DQS_N<3> IOSTANDARD="DIFF_SSTL18_II_DCI";
+Net DDR2_DQS_N<2> LOC=AJ27; Net DDR2_DQS_N<2> IOSTANDARD="DIFF_SSTL18_II_DCI";
+Net DDR2_DQS_N<1> LOC=AK27; Net DDR2_DQS_N<1> IOSTANDARD="DIFF_SSTL18_II_DCI";
+Net DDR2_DQS_N<0> LOC=AA30; Net DDR2_DQS_N<0> IOSTANDARD="DIFF_SSTL18_II_DCI";
+
+Net DDR2_DQS_P<7> LOC=G27; Net DDR2_DQS_P<7> IOSTANDARD="DIFF_SSTL18_II_DCI";
+Net DDR2_DQS_P<6> LOC=H28; Net DDR2_DQS_P<6> IOSTANDARD="DIFF_SSTL18_II_DCI";
+Net DDR2_DQS_P<5> LOC=E26; Net DDR2_DQS_P<5> IOSTANDARD="DIFF_SSTL18_II_DCI";
+Net DDR2_DQS_P<4> LOC=Y28; Net DDR2_DQS_P<4> IOSTANDARD="DIFF_SSTL18_II_DCI";
+Net DDR2_DQS_P<3> LOC=AB31; Net DDR2_DQS_P<3> IOSTANDARD="DIFF_SSTL18_II_DCI";
+Net DDR2_DQS_P<2> LOC=AK26; Net DDR2_DQS_P<2> IOSTANDARD="DIFF_SSTL18_II_DCI";
+Net DDR2_DQS_P<1> LOC=AK28; Net DDR2_DQS_P<1> IOSTANDARD="DIFF_SSTL18_II_DCI";
+Net DDR2_DQS_P<0> LOC=AA29; Net DDR2_DQS_P<0> IOSTANDARD="DIFF_SSTL18_II_DCI";
+
+Net I2C_DDR2_SCL LOC=E29;
+
+Net I2C_DDR2_SDA LOC=F29;
+
+Net CLKBUF_Q1_N LOC=J19;
+#Net CLKBUF_Q1_N PERIOD="200 Mhz";
+Net CLKBUF_Q1_P LOC=K18;
+#Net CLKBUF_Q1_P PERIOD="200 Mhz";
+
+
## Clock, Reset ##############################################################################
-Net clk_pin LOC=J16;
-Net clk_pin IOSTANDARD = LVCMOS25;
+Net clk_pin LOC=AH17;
-Net rst_pin LOC=H7;
+Net rst_pin LOC=E9;
Net rst_pin PULLUP;
-Net rst_pin IOSTANDARD = LVCMOS33;
Net clk_pin TNM_NET = clk_pin;
-TIMESPEC TS_clk_pin = PERIOD clk_pin 10 ns HIGH 50%;
+TIMESPEC TS_clk_pin = PERIOD clk_pin 30 ns HIGH 50%; # 33Mhz
-Net clk_unbuffered TNM_NET = clk_unbuffered;
-TIMESPEC TS_clk_unbuffered = PERIOD clk_unbuffered 20 ns;
+#Net clk_unbuffered TNM_NET = clk_unbuffered;
+#TIMESPEC TS_clk_unbuffered = PERIOD clk_unbuffered 20 ns;
Net rst_pin TIG;
#Net uart_rts IOSTANDARD = LVCMOS33;
#Net uart_rts TIG;
-Net uart_in LOC=E6;
-Net uart_in IOSTANDARD = LVCMOS33;
+Net uart_in LOC=AG15;
+#Net uart_in IOSTANDARD = LVCMOS33;
Net uart_in TIG;
Net uart_in PULLUP;
-Net uart_out LOC=D6;
-Net uart_out IOSTANDARD = LVCMOS33;
+Net uart_out LOC=AG20;
+#Net uart_out IOSTANDARD = LVCMOS33;
Net uart_out TIG;
Net uart_out PULLUP;
## VGA ##############################################################################
-net "vga_hsync" loc = f9;
-net "vga_hsync" slew = slow;
-net "vga_hsync" drive = 2;
-
-net "vga_vsync" loc = h10;
-net "vga_vsync" slew = slow;
-net "vga_vsync" drive = 2;
-
-net "vga_clkout" loc ="c12";
-net "vga_clkout" slew = fast;
-net "vga_clkout" drive = 8;
-
-net "vga_r<7>" loc ="h8";
-net "vga_r<6>" loc ="c5";
-net "vga_r<5>" loc ="h9";
-net "vga_r<4>" loc ="g12";
-net "vga_r<3>" loc ="g11";
-net "vga_r<2>" loc ="g10";
-net "vga_r<1>" loc ="f11";
-net "vga_r<0>" loc ="f10";
-net "vga_r<*>" slew = slow;
-net "vga_r<*>" drive = 2;
-
-net "vga_g<7>" loc ="d5";
-net "vga_g<6>" loc ="d4";
-net "vga_g<5>" loc ="f8";
-net "vga_g<4>" loc ="e13";
-net "vga_g<3>" loc ="e12";
-net "vga_g<2>" loc ="e11";
-net "vga_g<1>" loc ="e9";
-net "vga_g<0>" loc ="e8";
-net "vga_g<*>" slew = slow;
-net "vga_g<*>" drive = 2;
-
-net "vga_b<7>" loc ="c4";
-net "vga_b<6>" loc ="c3";
-net "vga_b<5>" loc ="d12";
-net "vga_b<4>" loc ="d11";
-net "vga_b<3>" loc ="d10";
-net "vga_b<2>" loc ="d9";
-net "vga_b<1>" loc ="c13";
-net "vga_b<0>" loc ="g8";
-net "vga_b<*>" slew = slow;
-net "vga_b<*>" drive = 2;
-
-net "vga_*" iostandard = lvcmos33;
-
-## DRAM ##############################################################################
+#net "vga_hsync" loc = f9;
+#net "vga_hsync" slew = slow;
+#net "vga_hsync" drive = 2;
+#
+#net "vga_vsync" loc = h10;
+#net "vga_vsync" slew = slow;
+#net "vga_vsync" drive = 2;
+#
+#net "vga_clkout" loc ="c12";
+#net "vga_clkout" slew = fast;
+#net "vga_clkout" drive = 8;
+#
+#net "vga_r<7>" loc ="h8";
+#net "vga_r<6>" loc ="c5";
+#net "vga_r<5>" loc ="h9";
+#net "vga_r<4>" loc ="g12";
+#net "vga_r<3>" loc ="g11";
+#net "vga_r<2>" loc ="g10";
+#net "vga_r<1>" loc ="f11";
+#net "vga_r<0>" loc ="f10";
+#net "vga_r<*>" slew = slow;
+#net "vga_r<*>" drive = 2;
+#
+#net "vga_g<7>" loc ="d5";
+#net "vga_g<6>" loc ="d4";
+#net "vga_g<5>" loc ="f8";
+#net "vga_g<4>" loc ="e13";
+#net "vga_g<3>" loc ="e12";
+#net "vga_g<2>" loc ="e11";
+#net "vga_g<1>" loc ="e9";
+#net "vga_g<0>" loc ="e8";
+#net "vga_g<*>" slew = slow;
+#net "vga_g<*>" drive = 2;
+#
+#net "vga_b<7>" loc ="c4";
+#net "vga_b<6>" loc ="c3";
+#net "vga_b<5>" loc ="d12";
+#net "vga_b<4>" loc ="d11";
+#net "vga_b<3>" loc ="d10";
+#net "vga_b<2>" loc ="d9";
+#net "vga_b<1>" loc ="c13";
+#net "vga_b<0>" loc ="g8";
+#net "vga_b<*>" slew = slow;
+#net "vga_b<*>" drive = 2;
+#
+#net "vga_*" iostandard = lvcmos33;
+#
+
+### DRAM ##############################################################################
NET "clk_pin" TNM="SYS_CLK";
#NET "*/*/clkgen/write_clk_u" TNM="WRITE_CLK";
#TIMESPEC "TS_DDRREAD_DDRWRITE"=FROM "READ_CLK" TO "WRITE_CLK" TIG;
#TIMESPEC "TS_DDRWRITE_DDRREAD"=FROM "WRITE_CLK" TO "READ_CLK" TIG;
-Net ddr1_Addr_pin<12> LOC=J24;
-Net ddr1_Addr_pin<12> IOSTANDARD = SSTL2_I;
-Net ddr1_Addr_pin<11> LOC=K26;
-Net ddr1_Addr_pin<11> IOSTANDARD = SSTL2_I;
-Net ddr1_Addr_pin<10> LOC=K24;
-Net ddr1_Addr_pin<10> IOSTANDARD = SSTL2_I;
-Net ddr1_Addr_pin<9> LOC=K23;
-Net ddr1_Addr_pin<9> IOSTANDARD = SSTL2_I;
-Net ddr1_Addr_pin<8> LOC=L26;
-Net ddr1_Addr_pin<8> IOSTANDARD = SSTL2_I;
-Net ddr1_Addr_pin<7> LOC=L25;
-Net ddr1_Addr_pin<7> IOSTANDARD = SSTL2_I;
-Net ddr1_Addr_pin<6> LOC=L24;
-Net ddr1_Addr_pin<6> IOSTANDARD = SSTL2_I;
-Net ddr1_Addr_pin<5> LOC=M23;
-Net ddr1_Addr_pin<5> IOSTANDARD = SSTL2_I;
-Net ddr1_Addr_pin<4> LOC=N24;
-Net ddr1_Addr_pin<4> IOSTANDARD = SSTL2_I;
-Net ddr1_Addr_pin<3> LOC=N23;
-Net ddr1_Addr_pin<3> IOSTANDARD = SSTL2_I;
-Net ddr1_Addr_pin<2> LOC=N22;
-Net ddr1_Addr_pin<2> IOSTANDARD = SSTL2_I;
-Net ddr1_Addr_pin<1> LOC=P22;
-Net ddr1_Addr_pin<1> IOSTANDARD = SSTL2_I;
-Net ddr1_Addr_pin<0> LOC=P24;
-Net ddr1_Addr_pin<0> IOSTANDARD = SSTL2_I;
-Net ddr1_BankAddr_pin<1> LOC=J26;
-Net ddr1_BankAddr_pin<1> IOSTANDARD = SSTL2_I;
-Net ddr1_BankAddr_pin<0> LOC=J25;
-Net ddr1_BankAddr_pin<0> IOSTANDARD = SSTL2_I;
-Net ddr1_CAS_n_pin LOC=D26;
-Net ddr1_CAS_n_pin IOSTANDARD = SSTL2_I;
-Net ddr1_CE_pin LOC=H14;
-Net ddr1_CE_pin IOSTANDARD = SSTL2_I;
-Net ddr1_CS_n_pin LOC=C27;
-Net ddr1_CS_n_pin IOSTANDARD = SSTL2_I;
-Net ddr1_RAS_n_pin LOC=D27;
-Net ddr1_RAS_n_pin IOSTANDARD = SSTL2_I;
-Net ddr1_WE_n_pin LOC=E27;
-Net ddr1_WE_n_pin IOSTANDARD = SSTL2_I;
-Net ddr1_DM_pin<0> LOC=F21;
-Net ddr1_DM_pin<0> IOSTANDARD = SSTL2_II;
-Net ddr1_DM_pin<1> LOC=G22;
-Net ddr1_DM_pin<1> IOSTANDARD = SSTL2_II;
-Net ddr1_DM_pin<2> LOC=E23;
-Net ddr1_DM_pin<2> IOSTANDARD = SSTL2_II;
-Net ddr1_DM_pin<3> LOC=G23;
-Net ddr1_DM_pin<3> IOSTANDARD = SSTL2_II;
-Net ddr1_DQS<0> LOC=F20;
-Net ddr1_DQS<0> IOSTANDARD = SSTL2_II;
-Net ddr1_DQS<1> LOC=G20;
-Net ddr1_DQS<1> IOSTANDARD = SSTL2_II;
-Net ddr1_DQS<2> LOC=G25;
-Net ddr1_DQS<2> IOSTANDARD = SSTL2_II;
-Net ddr1_DQS<3> LOC=F25;
-Net ddr1_DQS<3> IOSTANDARD = SSTL2_II;
-Net ddr1_DQ<0> LOC=E17;
-Net ddr1_DQ<0> IOSTANDARD = SSTL2_II;
-Net ddr1_DQ<1> LOC=E18;
-Net ddr1_DQ<1> IOSTANDARD = SSTL2_II;
-Net ddr1_DQ<2> LOC=F18;
-Net ddr1_DQ<2> IOSTANDARD = SSTL2_II;
-Net ddr1_DQ<3> LOC=G18;
-Net ddr1_DQ<3> IOSTANDARD = SSTL2_II;
-Net ddr1_DQ<4> LOC=F19;
-Net ddr1_DQ<4> IOSTANDARD = SSTL2_II;
-Net ddr1_DQ<5> LOC=E19;
-Net ddr1_DQ<5> IOSTANDARD = SSTL2_II;
-Net ddr1_DQ<6> LOC=D21;
-Net ddr1_DQ<6> IOSTANDARD = SSTL2_II;
-Net ddr1_DQ<7> LOC=E21;
-Net ddr1_DQ<7> IOSTANDARD = SSTL2_II;
-Net ddr1_DQ<8> LOC=G21;
-Net ddr1_DQ<8> IOSTANDARD = SSTL2_II;
-Net ddr1_DQ<9> LOC=H20;
-Net ddr1_DQ<9> IOSTANDARD = SSTL2_II;
-Net ddr1_DQ<10> LOC=J20;
-Net ddr1_DQ<10> IOSTANDARD = SSTL2_II;
-Net ddr1_DQ<11> LOC=J21;
-Net ddr1_DQ<11> IOSTANDARD = SSTL2_II;
-Net ddr1_DQ<12> LOC=K21;
-Net ddr1_DQ<12> IOSTANDARD = SSTL2_II;
-Net ddr1_DQ<13> LOC=L21;
-Net ddr1_DQ<13> IOSTANDARD = SSTL2_II;
-Net ddr1_DQ<14> LOC=J22;
-Net ddr1_DQ<14> IOSTANDARD = SSTL2_II;
-Net ddr1_DQ<15> LOC=H22;
-Net ddr1_DQ<15> IOSTANDARD = SSTL2_II;
-Net ddr1_DQ<16> LOC=C22;
-Net ddr1_DQ<16> IOSTANDARD = SSTL2_II;
-Net ddr1_DQ<17> LOC=C23;
-Net ddr1_DQ<17> IOSTANDARD = SSTL2_II;
-Net ddr1_DQ<18> LOC=C24;
-Net ddr1_DQ<18> IOSTANDARD = SSTL2_II;
-Net ddr1_DQ<19> LOC=C25;
-Net ddr1_DQ<19> IOSTANDARD = SSTL2_II;
-Net ddr1_DQ<20> LOC=D22;
-Net ddr1_DQ<20> IOSTANDARD = SSTL2_II;
-Net ddr1_DQ<21> LOC=D24;
-Net ddr1_DQ<21> IOSTANDARD = SSTL2_II;
-Net ddr1_DQ<22> LOC=D25;
-Net ddr1_DQ<22> IOSTANDARD = SSTL2_II;
-Net ddr1_DQ<23> LOC=C28;
-Net ddr1_DQ<23> IOSTANDARD = SSTL2_II;
-Net ddr1_DQ<24> LOC=F23;
-Net ddr1_DQ<24> IOSTANDARD = SSTL2_II;
-Net ddr1_DQ<25> LOC=F24;
-Net ddr1_DQ<25> IOSTANDARD = SSTL2_II;
-Net ddr1_DQ<26> LOC=F26;
-Net ddr1_DQ<26> IOSTANDARD = SSTL2_II;
-Net ddr1_DQ<27> LOC=G26;
-Net ddr1_DQ<27> IOSTANDARD = SSTL2_II;
-Net ddr1_DQ<28> LOC=H25;
-Net ddr1_DQ<28> IOSTANDARD = SSTL2_II;
-Net ddr1_DQ<29> LOC=H24;
-Net ddr1_DQ<29> IOSTANDARD = SSTL2_II;
-Net ddr1_DQ<30> LOC=E24;
-Net ddr1_DQ<30> IOSTANDARD = SSTL2_II;
-Net ddr1_DQ<31> LOC=E22;
-Net ddr1_DQ<31> IOSTANDARD = SSTL2_II;
-Net ddr1_Clk_pin LOC=F28;
-Net ddr1_Clk_pin IOSTANDARD = SSTL2_II;
-Net ddr1_Clk_n_pin LOC=E28;
-Net ddr1_Clk_n_pin IOSTANDARD = SSTL2_II;
+
+##==============================================================================
+## File: $URL: svn+ssh://repositorypub@repository.eecs.berkeley.edu/public/Projects/GateLib/branches/dev/Firmware/DRAM/Hardware/DDR2SDRAM/Constraints/DDR2SDRAM_ML505_110.ucf $
+## Version: $Revision: 16601 $
+## Author: Greg Gibeling (http://www.eecs.berkeley.edu/~gdgib/)
+## Copyright: Copyright 2005-2008 UC Berkeley
+##==============================================================================
+
+##==============================================================================
+## Section: License
+##==============================================================================
+## Copyright (c) 2005-2008, Regents of the University of California
+## All rights reserved.
+##
+## Redistribution and use in source and binary forms, with or without modification,
+## are permitted provided that the following conditions are met:
+##
+## - Redistributions of source code must retain the above copyright notice,
+## this list of conditions and the following disclaimer.
+## - Redistributions in binary form must reproduce the above copyright
+## notice, this list of conditions and the following disclaimer
+## in the documentation and/or other materials provided with the
+## distribution.
+## - Neither the name of the University of California, Berkeley nor the
+## names of its contributors may be used to endorse or promote
+## products derived from this software without specific prior
+## written permission.
+##
+## THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+## ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+## WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+## DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
+## ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+## (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+## LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+## ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+## (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+## SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+##==============================================================================
+
+##==============================================================================
+## Xilinx, Inc. 2006 www.xilinx.com
+## Mon Jul 7 12:05:40 2008
+## Generated by MIG Version 2.2
+##==============================================================================
+## File name: ddr2_sdram.ucf
+## Details: Constraints file
+## FPGA family: virtex5
+## FPGA: xc5vlx110t-ff1136
+## Speedgrade: -1
+## Design Entry: VERILOG
+## Frequency: 266.66 MHz
+## Design: without Test bench
+## DCM Used: Disable
+## Two Bytes per Bank: Disable
+## Compatible FPGA's: xc5vlx85t-ff1136,xc5vlx50t-ff1136,xc5vlx155t-ff1136,xc5vfx70t-ff1136,xc5vfx100t-ff1136,xc5vsx50t-ff1136,xc5vsx95t-ff1136
+## No.Of Controllers: 1
+##==============================================================================
+
+##------------------------------------------------------------------------------
+## Section: Pin Constraints (use FPGA_TOP instead)
+##------------------------------------------------------------------------------
+#NET "ddr2_dq[*]" IOSTANDARD = SSTL18_II_DCI;
+#NET "ddr2_a[*]" IOSTANDARD = SSTL18_II;
+#NET "ddr2_ba[*]" IOSTANDARD = SSTL18_II;
+#NET "ddr2_ras_n" IOSTANDARD = SSTL18_II;
+#NET "ddr2_cas_n" IOSTANDARD = SSTL18_II;
+#NET "ddr2_we_n" IOSTANDARD = SSTL18_II;
+#NET "ddr2_cs_n[*]" IOSTANDARD = SSTL18_II;
+#NET "ddr2_odt[*]" IOSTANDARD = SSTL18_II;
+#NET "ddr2_cke[*]" IOSTANDARD = SSTL18_II;
+#NET "ddr2_dm[*]" IOSTANDARD = SSTL18_II;
+#NET "ddr2_dqs[*]" IOSTANDARD = DIFF_SSTL18_II_DCI;
+#NET "ddr2_dqs_n[*]" IOSTANDARD = DIFF_SSTL18_II_DCI;
+#NET "ddr2_ck[*]" IOSTANDARD = DIFF_SSTL18_II;
+#NET "ddr2_ck_n[*]" IOSTANDARD = DIFF_SSTL18_II;
+##------------------------------------------------------------------------------
+
+##------------------------------------------------------------------------------
+## Section: Clock Constraints
+##------------------------------------------------------------------------------
+NET "**/Clock" TNM_NET = "SYS_Clock";
+TIMESPEC "TS_SYS_Clock" = PERIOD "SYS_Clock" 5 ns HIGH 50 %;
+
+NET "**/ClockP90" TNM_NET = "SYS_ClockP90";
+TIMESPEC "TS_SYS_ClockP90" = PERIOD "SYS_ClockP90" 5 ns HIGH 50 %;
+
+NET "**/ClockD2" TNM_NET = "SYS_ClockD2";
+TIMESPEC "TS_SYS_ClockD2" = PERIOD "SYS_ClockD2" 7.5 ns HIGH 50 %;
+
+#NET "*/ClockF200" TNM_NET = "SYS_ClockF200";
+#TIMESPEC "TS_SYS_ClockF200" = PERIOD "SYS_ClockF200" 5 ns HIGH 50 %;
+##------------------------------------------------------------------------------
+
+##==============================================================================
+## Section: Controller 0
+## Desc: Memory Device: DDR2_SDRAM->SODIMMs->MT4HTF3264HY-53E
+## Data Width: 64
+## Data Mask: 1
+##==============================================================================
+
+##------------------------------------------------------------------------------
+## Section: IDELAYCTRL Location Constraints
+##------------------------------------------------------------------------------
+INST "**/*IDELAYCTRL_INST[0].u_idelayctrl" LOC=IDELAYCTRL_X0Y2;
+INST "**/*IDELAYCTRL_INST[1].u_idelayctrl" LOC=IDELAYCTRL_X0Y1;
+INST "**/*IDELAYCTRL_INST[2].u_idelayctrl" LOC=IDELAYCTRL_X0Y6;
+##------------------------------------------------------------------------------
+
+##------------------------------------------------------------------------------
+## Section: Multicycle Paths
+## Desc: Define multicycle paths - these paths may take longer because
+## additional time allowed for logic to settle in
+## calibration/initialization FSM
+##------------------------------------------------------------------------------
+# MIG 2.1: Eliminate Timegroup definitions for CLK0, and CLK90. Instead trace
+# multicycle paths from originating flip-flop to ANY destination
+# flip-flop (or in some cases, it can also be a BRAM)
+# MUX Select for either rising/falling CLK0 for 2nd stage read capture
+INST "**/u_phy_calib/*gen_rd_data_sel*.u_ff_rd_data_sel" TNM = "TNM_RD_DATA_SEL";
+TIMESPEC "TS_MC_RD_DATA_SEL" = FROM "TNM_RD_DATA_SEL" TO FFS "TS_SYS_Clock" * 4;
+
+# MUX select for read data - optional delay on data to account for byte skews
+#INST "*/u_usr_rd/*gen_rden_sel_mux*.u_ff_rden_sel_mux" TNM = "TNM_RDEN_SEL_MUX";
+#TIMESPEC "TS_MC_RDEN_SEL_MUX" = FROM "TNM_RDEN_SEL_MUX" TO FFS "TS_SYS_Clock" * 4;
+
+# Calibration/Initialization complete status flag (for PHY logic only) - can
+# be used to drive both flip-flops and BRAMs
+INST "*/u_phy_init/u_ff_phy_init_data_sel" TNM = "TNM_PHY_INIT_DATA_SEL";
+TIMESPEC "TS_MC_PHY_INIT_DATA_SEL_0" = FROM "TNM_PHY_INIT_DATA_SEL" TO FFS "TS_SYS_Clock" * 4;
+TIMESPEC "TS_MC_PHY_INIT_DATA_SEL_90" = FROM "TNM_PHY_INIT_DATA_SEL" TO RAMS "TS_SYS_Clock" * 4;
+
+# Select (address) bits for SRL32 shift registers used in stage3/stage4
+# calibration
+INST "**/u_phy_calib/*gen_gate_dly*.u_ff_gate_dly" TNM = "TNM_GATE_DLY";
+TIMESPEC "TS_MC_GATE_DLY" = FROM "TNM_GATE_DLY" TO FFS "TS_SYS_Clock" * 4;
+INST "**/u_phy_calib/*gen_rden_dly*.u_ff_rden_dly" TNM = "TNM_RDEN_DLY";
+TIMESPEC "TS_MC_RDEN_DLY" = FROM "TNM_RDEN_DLY" TO FFS "TS_SYS_Clock" * 4;
+INST "**/u_phy_calib/*gen_cal_rden_dly*.u_ff_cal_rden_dly" TNM = "TNM_CAL_RDEN_DLY";
+TIMESPEC "TS_MC_CAL_RDEN_DLY" = FROM "TNM_CAL_RDEN_DLY" TO FFS "TS_SYS_Clock" * 4;
+##------------------------------------------------------------------------------
+
+##------------------------------------------------------------------------------
+## Section: DQS Squelch Constraints
+## Desc: DQS Read Post amble Glitch Squelch circuit related constraints
+## LOC placement of DQS-squelch related IDDR and IDELAY elements
+## Each circuit can be located at any of the following locations:
+## 1. Unused "N"-side of DQS differential pair I/O
+## 2. DM data mask (output only, input side is free for use)
+## 3. Any output-only site
+##------------------------------------------------------------------------------
+INST "**/*gen_dqs[0].u_iob_dqs/u_iddr_dq_ce" LOC = "ILOGIC_X0Y96";
+INST "**/*gen_dqs[0].u_iob_dqs/u_iodelay_dq_ce" LOC = "IODELAY_X0Y96";
+INST "**/*gen_dqs[1].u_iob_dqs/u_iddr_dq_ce" LOC = "ILOGIC_X0Y58";
+INST "**/*gen_dqs[1].u_iob_dqs/u_iodelay_dq_ce" LOC = "IODELAY_X0Y58";
+INST "**/*gen_dqs[2].u_iob_dqs/u_iddr_dq_ce" LOC = "ILOGIC_X0Y62";
+INST "**/*gen_dqs[2].u_iob_dqs/u_iodelay_dq_ce" LOC = "IODELAY_X0Y62";
+INST "**/*gen_dqs[3].u_iob_dqs/u_iddr_dq_ce" LOC = "ILOGIC_X0Y100";
+INST "**/*gen_dqs[3].u_iob_dqs/u_iodelay_dq_ce" LOC = "IODELAY_X0Y100";
+INST "**/*gen_dqs[4].u_iob_dqs/u_iddr_dq_ce" LOC = "ILOGIC_X0Y102";
+INST "**/*gen_dqs[4].u_iob_dqs/u_iodelay_dq_ce" LOC = "IODELAY_X0Y102";
+INST "**/*gen_dqs[5].u_iob_dqs/u_iddr_dq_ce" LOC = "ILOGIC_X0Y256";
+INST "**/*gen_dqs[5].u_iob_dqs/u_iodelay_dq_ce" LOC = "IODELAY_X0Y256";
+INST "**/*gen_dqs[6].u_iob_dqs/u_iddr_dq_ce" LOC = "ILOGIC_X0Y260";
+INST "**/*gen_dqs[6].u_iob_dqs/u_iodelay_dq_ce" LOC = "IODELAY_X0Y260";
+INST "**/*gen_dqs[7].u_iob_dqs/u_iddr_dq_ce" LOC = "ILOGIC_X0Y262";
+INST "**/*gen_dqs[7].u_iob_dqs/u_iodelay_dq_ce" LOC = "IODELAY_X0Y262";
+##------------------------------------------------------------------------------
+
+##------------------------------------------------------------------------------
+## Section: DQS CE LOCs
+## Desc: LOC and timing constraints for flop driving DQS CE enable signal
+## from fabric logic. Even though the absolute delay on this path
+## is calibrated out (when synchronizing this output to DQS), the
+## delay should still be kept as low as possible to reduce
+## post-calibration voltage/temp variations - these are roughly
+## proportional to the absolute delay of the path
+##------------------------------------------------------------------------------
+INST "**/u_phy_calib/*gen_gate[0].u_en_dqs_ff" LOC = SLICE_X0Y48;
+INST "**/u_phy_calib/*gen_gate[1].u_en_dqs_ff" LOC = SLICE_X0Y29;
+INST "**/u_phy_calib/*gen_gate[2].u_en_dqs_ff" LOC = SLICE_X0Y31;
+INST "**/u_phy_calib/*gen_gate[3].u_en_dqs_ff" LOC = SLICE_X0Y50;
+INST "**/u_phy_calib/*gen_gate[4].u_en_dqs_ff" LOC = SLICE_X0Y51;
+INST "**/u_phy_calib/*gen_gate[5].u_en_dqs_ff" LOC = SLICE_X0Y128;
+INST "**/u_phy_calib/*gen_gate[6].u_en_dqs_ff" LOC = SLICE_X0Y130;
+INST "**/u_phy_calib/*gen_gate[7].u_en_dqs_ff" LOC = SLICE_X0Y131;
+##------------------------------------------------------------------------------
+
+##------------------------------------------------------------------------------
+## Section: DQS Gate Control
+## Desc: Control for DQS gate - from fabric flop. Prevent "runaway"
+## delay - two parts to this path: (1) from fabric flop to IDELAY,
+## (2) from IDELAY to asynchronous reset of IDDR that drives the DQ
+## CE's. This can be relaxed by the user for lower frequencies:
+## 300MHz = 850ps, 267MHz = 900ps. At 200MHz = 950ps.
+## In general PAR should be able to route this within 900ps over
+## all speed grades.
+##------------------------------------------------------------------------------
+NET "**/u_phy_io/en_dqs*" MAXDELAY = 600 ps;
+NET "**/u_phy_io/*gen_dqs*.u_iob_dqs/en_dqs_sync" MAXDELAY = 850 ps;
+##------------------------------------------------------------------------------
+
+##------------------------------------------------------------------------------
+## Section: IDDR Half Cycles
+## Desc: "Half-cycle" path constraint from IDDR to CE pin for all DQ
+## IDDR's for DQS Read Post amble Glitch Squelch circuit.
+##------------------------------------------------------------------------------
+# Max delay from output of IDDR to CE input of DQ IDDRs = tRPST + some slack
+# where slack account for rise-time of DQS on board. For now assume slack =
+# 0.400ns (based on initial SPICE simulations, assumes use of ODT), so
+# time = 0.4*Tcyc + 0.40ns = 1.6ns @333MHz
+INST "**/*gen_dqs[*].u_iob_dqs/u_iddr_dq_ce" TNM = "TNM_DQ_CE_IDDR";
+INST "**/*gen_dq[*].u_iob_dq/*gen_stg2_*.u_iddr_dq" TNM = "TNM_DQS_FLOPS";
+TIMESPEC "TS_DQ_CE" = FROM "TNM_DQ_CE_IDDR" TO "TNM_DQS_FLOPS" 1.9 ns;
+##------------------------------------------------------------------------------
+
+##------------------------------------------------------------------------------
+## Section: Area Group
+## Desc: MIG 2.2: Prevent unrelated logic from being packed into any
+## slices used by read data capture RPM's - if unrelated logic gets
+## packed into these slices, it could cause the DIRT strings that
+## define the IDDR -> fabric flop routing to become unroutable
+## during PAR stage (unrelated logic may require routing resources
+## required by the DIRT strings - MAP does not currently take into
+## account DIRT strings when placing logic
+##------------------------------------------------------------------------------
+AREA_GROUP "DDR_CAPTURE_FFS" GROUP = CLOSED;
+##------------------------------------------------------------------------------
+
+##------------------------------------------------------------------------------
+## Section: DQ LOC Constraints
+## Desc: Location constraints for DQ read-data capture flops in fabric
+## (for 2nd stage capture)
+##------------------------------------------------------------------------------
+INST "**/*gen_dq[0].u_iob_dq/*gen_stg2_*.u_ff_stg2a_rise" RLOC_ORIGIN = X0Y42;
+INST "**/*gen_dq[1].u_iob_dq/*gen_stg2_*.u_ff_stg2a_rise" RLOC_ORIGIN = X0Y43;
+INST "**/*gen_dq[2].u_iob_dq/*gen_stg2_*.u_ff_stg2a_rise" RLOC_ORIGIN = X0Y45;
+INST "**/*gen_dq[3].u_iob_dq/*gen_stg2_*.u_ff_stg2a_rise" RLOC_ORIGIN = X0Y46;
+INST "**/*gen_dq[4].u_iob_dq/*gen_stg2_*.u_ff_stg2a_rise" RLOC_ORIGIN = X0Y41;
+INST "**/*gen_dq[5].u_iob_dq/*gen_stg2_*.u_ff_stg2a_rise" RLOC_ORIGIN = X0Y42;
+INST "**/*gen_dq[6].u_iob_dq/*gen_stg2_*.u_ff_stg2a_rise" RLOC_ORIGIN = X0Y44;
+INST "**/*gen_dq[7].u_iob_dq/*gen_stg2_*.u_ff_stg2a_rise" RLOC_ORIGIN = X0Y44;
+INST "**/*gen_dq[8].u_iob_dq/*gen_stg2_*.u_ff_stg2a_rise" RLOC_ORIGIN = X0Y28;
+INST "**/*gen_dq[9].u_iob_dq/*gen_stg2_*.u_ff_stg2a_rise" RLOC_ORIGIN = X0Y32;
+INST "**/*gen_dq[10].u_iob_dq/*gen_stg2_*.u_ff_stg2a_rise" RLOC_ORIGIN = X0Y33;
+INST "**/*gen_dq[11].u_iob_dq/*gen_stg2_*.u_ff_stg2a_rise" RLOC_ORIGIN = X0Y34;
+INST "**/*gen_dq[12].u_iob_dq/*gen_stg2_*.u_ff_stg2a_rise" RLOC_ORIGIN = X0Y26;
+INST "**/*gen_dq[13].u_iob_dq/*gen_stg2_*.u_ff_stg2a_rise" RLOC_ORIGIN = X0Y28;
+INST "**/*gen_dq[14].u_iob_dq/*gen_stg2_*.u_ff_stg2a_rise" RLOC_ORIGIN = X0Y33;
+INST "**/*gen_dq[15].u_iob_dq/*gen_stg2_*.u_ff_stg2a_rise" RLOC_ORIGIN = X0Y34;
+INST "**/*gen_dq[16].u_iob_dq/*gen_stg2_*.u_ff_stg2a_rise" RLOC_ORIGIN = X0Y35;
+INST "**/*gen_dq[17].u_iob_dq/*gen_stg2_*.u_ff_stg2a_rise" RLOC_ORIGIN = X0Y36;
+INST "**/*gen_dq[18].u_iob_dq/*gen_stg2_*.u_ff_stg2a_rise" RLOC_ORIGIN = X0Y38;
+INST "**/*gen_dq[19].u_iob_dq/*gen_stg2_*.u_ff_stg2a_rise" RLOC_ORIGIN = X0Y39;
+INST "**/*gen_dq[20].u_iob_dq/*gen_stg2_*.u_ff_stg2a_rise" RLOC_ORIGIN = X0Y36;
+INST "**/*gen_dq[21].u_iob_dq/*gen_stg2_*.u_ff_stg2a_rise" RLOC_ORIGIN = X0Y37;
+INST "**/*gen_dq[22].u_iob_dq/*gen_stg2_*.u_ff_stg2a_rise" RLOC_ORIGIN = X0Y38;
+INST "**/*gen_dq[23].u_iob_dq/*gen_stg2_*.u_ff_stg2a_rise" RLOC_ORIGIN = X0Y39;
+INST "**/*gen_dq[24].u_iob_dq/*gen_stg2_*.u_ff_stg2a_rise" RLOC_ORIGIN = X0Y46;
+INST "**/*gen_dq[25].u_iob_dq/*gen_stg2_*.u_ff_stg2a_rise" RLOC_ORIGIN = X0Y49;
+INST "**/*gen_dq[26].u_iob_dq/*gen_stg2_*.u_ff_stg2a_rise" RLOC_ORIGIN = X0Y53;
+INST "**/*gen_dq[27].u_iob_dq/*gen_stg2_*.u_ff_stg2a_rise" RLOC_ORIGIN = X0Y55;
+INST "**/*gen_dq[28].u_iob_dq/*gen_stg2_*.u_ff_stg2a_rise" RLOC_ORIGIN = X0Y49;
+INST "**/*gen_dq[29].u_iob_dq/*gen_stg2_*.u_ff_stg2a_rise" RLOC_ORIGIN = X0Y52;
+INST "**/*gen_dq[30].u_iob_dq/*gen_stg2_*.u_ff_stg2a_rise" RLOC_ORIGIN = X0Y54;
+INST "**/*gen_dq[31].u_iob_dq/*gen_stg2_*.u_ff_stg2a_rise" RLOC_ORIGIN = X0Y56;
+INST "**/*gen_dq[32].u_iob_dq/*gen_stg2_*.u_ff_stg2a_rise" RLOC_ORIGIN = X0Y52;
+INST "**/*gen_dq[33].u_iob_dq/*gen_stg2_*.u_ff_stg2a_rise" RLOC_ORIGIN = X0Y56;
+INST "**/*gen_dq[34].u_iob_dq/*gen_stg2_*.u_ff_stg2a_rise" RLOC_ORIGIN = X0Y58;
+INST "**/*gen_dq[35].u_iob_dq/*gen_stg2_*.u_ff_stg2a_rise" RLOC_ORIGIN = X0Y59;
+INST "**/*gen_dq[36].u_iob_dq/*gen_stg2_*.u_ff_stg2a_rise" RLOC_ORIGIN = X0Y54;
+INST "**/*gen_dq[37].u_iob_dq/*gen_stg2_*.u_ff_stg2a_rise" RLOC_ORIGIN = X0Y57;
+INST "**/*gen_dq[38].u_iob_dq/*gen_stg2_*.u_ff_stg2a_rise" RLOC_ORIGIN = X0Y58;
+INST "**/*gen_dq[39].u_iob_dq/*gen_stg2_*.u_ff_stg2a_rise" RLOC_ORIGIN = X0Y59;
+INST "**/*gen_dq[40].u_iob_dq/*gen_stg2_*.u_ff_stg2a_rise" RLOC_ORIGIN = X0Y120;
+INST "**/*gen_dq[41].u_iob_dq/*gen_stg2_*.u_ff_stg2a_rise" RLOC_ORIGIN = X0Y121;
+INST "**/*gen_dq[42].u_iob_dq/*gen_stg2_*.u_ff_stg2a_rise" RLOC_ORIGIN = X0Y122;
+INST "**/*gen_dq[43].u_iob_dq/*gen_stg2_*.u_ff_stg2a_rise" RLOC_ORIGIN = X0Y123;
+INST "**/*gen_dq[44].u_iob_dq/*gen_stg2_*.u_ff_stg2a_rise" RLOC_ORIGIN = X0Y120;
+INST "**/*gen_dq[45].u_iob_dq/*gen_stg2_*.u_ff_stg2a_rise" RLOC_ORIGIN = X0Y121;
+INST "**/*gen_dq[46].u_iob_dq/*gen_stg2_*.u_ff_stg2a_rise" RLOC_ORIGIN = X0Y123;
+INST "**/*gen_dq[47].u_iob_dq/*gen_stg2_*.u_ff_stg2a_rise" RLOC_ORIGIN = X0Y124;
+INST "**/*gen_dq[48].u_iob_dq/*gen_stg2_*.u_ff_stg2a_rise" RLOC_ORIGIN = X0Y124;
+INST "**/*gen_dq[49].u_iob_dq/*gen_stg2_*.u_ff_stg2a_rise" RLOC_ORIGIN = X0Y126;
+INST "**/*gen_dq[50].u_iob_dq/*gen_stg2_*.u_ff_stg2a_rise" RLOC_ORIGIN = X0Y132;
+INST "**/*gen_dq[51].u_iob_dq/*gen_stg2_*.u_ff_stg2a_rise" RLOC_ORIGIN = X0Y133;
+INST "**/*gen_dq[52].u_iob_dq/*gen_stg2_*.u_ff_stg2a_rise" RLOC_ORIGIN = X0Y125;
+INST "**/*gen_dq[53].u_iob_dq/*gen_stg2_*.u_ff_stg2a_rise" RLOC_ORIGIN = X0Y126;
+INST "**/*gen_dq[54].u_iob_dq/*gen_stg2_*.u_ff_stg2a_rise" RLOC_ORIGIN = X0Y133;
+INST "**/*gen_dq[55].u_iob_dq/*gen_stg2_*.u_ff_stg2a_rise" RLOC_ORIGIN = X0Y134;
+INST "**/*gen_dq[56].u_iob_dq/*gen_stg2_*.u_ff_stg2a_rise" RLOC_ORIGIN = X0Y134;
+INST "**/*gen_dq[57].u_iob_dq/*gen_stg2_*.u_ff_stg2a_rise" RLOC_ORIGIN = X0Y136;
+INST "**/*gen_dq[58].u_iob_dq/*gen_stg2_*.u_ff_stg2a_rise" RLOC_ORIGIN = X0Y137;
+INST "**/*gen_dq[59].u_iob_dq/*gen_stg2_*.u_ff_stg2a_rise" RLOC_ORIGIN = X0Y138;
+INST "**/*gen_dq[60].u_iob_dq/*gen_stg2_*.u_ff_stg2a_rise" RLOC_ORIGIN = X0Y135;
+INST "**/*gen_dq[61].u_iob_dq/*gen_stg2_*.u_ff_stg2a_rise" RLOC_ORIGIN = X0Y136;
+INST "**/*gen_dq[62].u_iob_dq/*gen_stg2_*.u_ff_stg2a_rise" RLOC_ORIGIN = X0Y138;
+INST "**/*gen_dq[63].u_iob_dq/*gen_stg2_*.u_ff_stg2a_rise" RLOC_ORIGIN = X0Y139;
+##------------------------------------------------------------------------------
projects / fleet.git / commitdiff