[project @ 2004-09-12 12:12:18 by panne]

[ghc-hetmet.git] / ghc / rts / RtsStartup.c

diff --git a/ghc/rts/RtsStartup.c b/ghc/rts/RtsStartup.c
index edbf88a..d605328 100644 (file)
--- a/ghc/rts/RtsStartup.c
+++ b/ghc/rts/RtsStartup.c
@@ -1,5 +1,4 @@
 /* -----------------------------------------------------------------------------
- * $Id: RtsStartup.c,v 1.78 2003/09/26 12:12:35 panne Exp $
  *
  * (c) The GHC Team, 1998-2002
  *
@@ -13,7 +12,6 @@
 #include "RtsUtils.h"
 #include "RtsFlags.h"  
 #include "Storage.h"    /* initStorage, exitStorage */
-#include "StablePriv.h" /* initStablePtrTable */
 #include "Schedule.h"   /* initScheduler */
 #include "Stats.h"      /* initStats */
 #include "Signals.h"
@@ -21,11 +19,11 @@
 #include "Weak.h"
 #include "Ticky.h"
 #include "StgRun.h"
-#include "StgStartup.h"
 #include "Prelude.h"           /* fixupRTStoPreludeRefs */
 #include "HsFFI.h"
 #include "Linker.h"
 #include "ThreadLabels.h"
+#include "BlockAlloc.h"
 
 #if defined(RTS_GTK_FRONTPANEL)
 #include "FrontPanel.h"
@@ -67,9 +65,6 @@
 #include <signal.h>
 #endif
 
-// Flag Structure
-struct RTS_FLAGS RtsFlags;
-
 // Count of how many outstanding hs_init()s there have been.
 static int hs_init_count = 0;
 
@@ -94,6 +89,33 @@ __hscore_set_saved_termios(int fd, void* ts)
 }
 
 /* -----------------------------------------------------------------------------
+   Initialise floating point unit on x86 (currently disabled. why?)
+   -------------------------------------------------------------------------- */
+
+#define X86_INIT_FPU 0
+
+#if X86_INIT_FPU
+static void
+x86_init_fpu ( void )
+{
+  __volatile unsigned short int fpu_cw;
+
+  // Grab the control word
+  __asm __volatile ("fnstcw %0" : "=m" (fpu_cw));
+
+#if 0
+  printf("fpu_cw: %x\n", fpu_cw);
+#endif
+
+  // Set bits 8-9 to 10 (64-bit precision).
+  fpu_cw = (fpu_cw & 0xfcff) | 0x0200;
+
+  // Store the new control word back
+  __asm __volatile ("fldcw %0" : : "m" (fpu_cw));
+}
+#endif
+
+/* -----------------------------------------------------------------------------
    Starting up the RTS
    -------------------------------------------------------------------------- */
 
@@ -143,10 +165,13 @@ hs_init(int *argc, char **argv[])
 #if defined(PAR)
     /* NB: this really must be done after processing the RTS flags */
     IF_PAR_DEBUG(verbose,
-                 fprintf(stderr, "==== Synchronising system (%d PEs)\n", nPEs));
+                 debugBelch("==== Synchronising system (%d PEs)\n", nPEs));
     synchroniseSystem();             // calls initParallelSystem etc
 #endif /* PAR */
 
+    /* Perform initialisation of adjustor thunk layer. */
+    initAdjustor();
+
     /* initialise scheduler data structures (needs to be done before
      * initStorage()).
      */
@@ -199,7 +224,11 @@ hs_init(int *argc, char **argv[])
 #endif
 
 #ifdef HAVE_LOCALE_H
-    setlocale(LC_ALL,"");
+    setlocale(LC_CTYPE,"");
+#endif
+
+#if X86_INIT_FPU
+    x86_init_fpu();
 #endif
 
     /* Record initialization times */
@@ -285,12 +314,14 @@ hs_add_root(void (*init_root)(void))
        barf("hs_add_root() must be called after hs_init()");
     }
 
-    init_sp = 0;
+    /* The initialisation stack grows downward, with sp pointing 
+       to the last occupied word */
+    init_sp = INIT_STACK_BLOCKS*BLOCK_SIZE_W;
     bd = allocGroup(INIT_STACK_BLOCKS);
     init_stack = (F_ *)bd->start;
-    init_stack[init_sp++] = (F_)stg_init_ret;
+    init_stack[--init_sp] = (F_)stg_init_finish;
     if (init_root != NULL) {
-       init_stack[init_sp++] = (F_)init_root;
+       init_stack[--init_sp] = (F_)init_root;
     }
     
     cap.r.rSp = (P_)(init_stack + init_sp);
@@ -324,14 +355,14 @@ hs_exit(void)
     /* start timing the shutdown */
     stat_startExit();
     
-    /* stop all running tasks */
-    exitScheduler();
-    
 #if !defined(GRAN)
     /* Finalize any remaining weak pointers */
     finalizeWeakPointersNow();
 #endif
     
+    /* stop all running tasks */
+    exitScheduler();
+    
 #if defined(GRAN)
     /* end_gr_simulation prints global stats if requested -- HWL */
     if (!RtsFlags.GranFlags.GranSimStats.Suppressed)
@@ -452,9 +483,8 @@ stg_exit(int n)
     return;
   exit_started=rtsTrue;
 
-  IF_PAR_DEBUG(verbose, fprintf(stderr,"==-- stg_exit %d on [%x]...", n, mytid));
+  IF_PAR_DEBUG(verbose, debugBelch("==-- stg_exit %d on [%x]...", n, mytid));
   shutdownParallelSystem(n);
 #endif
   exit(n);
 }
-