add flush support to ships

[fleet.git] / ships / DRAM.ship

diff --git a/ships/DRAM.ship b/ships/DRAM.ship
index b3758dc..d5d5338 100644 (file)
--- a/ships/DRAM.ship
+++ b/ships/DRAM.ship
@@ -15,20 +15,21 @@ data  out:   out
 
 == FPGA ==============================================================
 
-  // FIXME: use the other chip (64-bit data bus)
-
   reg         dram_addr_r;
   reg         dram_isread;
   reg         dram_write_data_push;
   reg         dram_read_data_pop;
-  reg  [`DATAWIDTH-1:0]  out_d;
+  reg  [`DATAWIDTH:0]  out_d;
+  wire [31:0] dram_addr__;
 
   assign dram_addr_r_ = dram_addr_r;
   assign dram_isread_ = dram_isread;
-  assign dram_addr_ = !dram_isread ? inAddrWrite_d[31:0] : inAddrRead_d[31:0];
+  assign dram_addr__ = !dram_isread ? inAddrWrite_d[31:0] : inAddrRead_d[31:0];
+  assign dram_addr_  = { dram_addr__[30:6], 1'b0, dram_addr__[5:0] };
   assign dram_write_data_push_ = dram_write_data_push;
   assign dram_read_data_pop_ = dram_read_data_pop;
-  assign dram_write_data_ = inDataWrite_d[31:0];
+  assign dram_write_data_ = inDataWrite_d;
+//  assign dram_write_data_ = inDataWrite_d[(`DATAWIDTH-1):0];
   assign out_d_ = out_d;
 
   always @(posedge clk) begin
@@ -40,11 +41,12 @@ data  out:   out
       dram_read_data_pop <= 0;
 
     end else begin
+      `flush
 
-      if (!inAddrRead_r  && inAddrRead_a)  inAddrRead_a  <= 0;
-      if (!inDataWrite_r && inDataWrite_a) inDataWrite_a <= 0;
-      if (!inAddrWrite_r && inAddrWrite_a) inAddrWrite_a <= 0;
-      if ( out_r         && out_a)         out_r <= 0;
+      if (!inAddrRead_r_  && inAddrRead_a)  inAddrRead_a  <= 0;
+      if (!inDataWrite_r_ && inDataWrite_a) inDataWrite_a <= 0;
+      if (!inAddrWrite_r_ && inAddrWrite_a) inAddrWrite_a <= 0;
+      if ( out_r          && out_a)         out_r <= 0;
 
       if (dram_addr_r && !dram_addr_a) begin
          // busy
@@ -52,15 +54,17 @@ data  out:   out
           dram_addr_r <= 0;
           inAddrWrite_a <= 1;
           inDataWrite_a <= 1;
+          out_d <= { 1'b1, 37'b0 };
+          out_r <= 1;
       end else if (dram_addr_r &&  dram_addr_a && dram_isread) begin
           dram_addr_r <= 0;
           inAddrRead_a <= 1;
-          out_d <= dram_read_data;
+          out_d <= { 1'b0, dram_read_data[36:0] };
           out_r <= 1;
-      end else if (inAddrWrite_r && !inAddrWrite_a && inDataWrite_r && !inDataWrite_a && !dram_addr_r && !dram_addr_a) begin
+      end else if (!out_r && !out_a && inAddrWrite_r && !inAddrWrite_a && inDataWrite_r && !inDataWrite_a && !dram_addr_r && !dram_addr_a) begin
           dram_addr_r <= 1;
           dram_isread <= 0;
-      end else if (inAddrRead_r && !inAddrRead_a && !out_r && !out_a && !dram_addr_r && !dram_addr_a) begin
+      end else if (!out_r && !out_a && inAddrRead_r && !inAddrRead_a && !dram_addr_r && !dram_addr_a) begin
           dram_addr_r <= 1;
           dram_isread <= 1;
       end