arch/cris/arch-v32/kernel/vcs_hook.c

   1 // $Id: vcs_hook.c,v 1.2 2003/08/12 12:01:06 starvik Exp $
   2 //
   3 // Call simulator hook. This is the part running in the
   4 // simulated program.
   5 //
   6
   7 #include "vcs_hook.h"
   8 #include <stdarg.h>
   9 #include <asm/arch-v32/hwregs/reg_map.h>
  10 #include <asm/arch-v32/hwregs/intr_vect_defs.h>
  11
  12 #define HOOK_TRIG_ADDR     0xb7000000   /* hook cvlog model reg address */
  13 #define HOOK_MEM_BASE_ADDR 0xa0000000   /* csp4 (shared mem) base addr */
  14
  15 #define HOOK_DATA(offset) ((unsigned*) HOOK_MEM_BASE_ADDR)[offset]
  16 #define VHOOK_DATA(offset) ((volatile unsigned*) HOOK_MEM_BASE_ADDR)[offset]
  17 #define HOOK_TRIG(funcid) do { *((unsigned *) HOOK_TRIG_ADDR) = funcid; } while(0)
  18 #define HOOK_DATA_BYTE(offset) ((unsigned char*) HOOK_MEM_BASE_ADDR)[offset]
  19
  20
  21 // ------------------------------------------------------------------ hook_call
  22 int hook_call( unsigned id, unsigned pcnt, ...) {
  23   va_list ap;
  24   unsigned i;
  25   unsigned ret;
  26 #ifdef USING_SOS
  27   PREEMPT_OFF_SAVE();
  28 #endif
  29
  30   // pass parameters
  31   HOOK_DATA(0) = id;
  32
  33   /* Have to make hook_print_str a special case since we call with a
  34      parameter of byte type. Should perhaps be a separate
  35      hook_call. */
  36
  37   if (id == hook_print_str) {
  38     int i;
  39     char *str;
  40
  41     HOOK_DATA(1) = pcnt;
  42
  43     va_start(ap, pcnt);
  44     str = (char*)va_arg(ap,unsigned);
  45
  46     for (i=0; i!=pcnt; i++) {
  47       HOOK_DATA_BYTE(8+i) = str[i];
  48     }
  49     HOOK_DATA_BYTE(8+i) = 0;    /* null byte */
  50   }
  51   else {
  52     va_start(ap, pcnt);
  53     for( i = 1; i <= pcnt; i++ ) HOOK_DATA(i) = va_arg(ap,unsigned);
  54     va_end(ap);
  55   }
  56
  57   // read from mem to make sure data has propagated to memory before trigging
  58   *((volatile unsigned*) HOOK_MEM_BASE_ADDR);
  59
  60   // trigger hook
  61   HOOK_TRIG(id);
  62
  63   // wait for call to finish
  64   while( VHOOK_DATA(0) > 0 ) {}
  65
  66   // extract return value
  67
  68   ret = VHOOK_DATA(1);
  69
  70 #ifdef USING_SOS
  71   PREEMPT_RESTORE();
  72 #endif
  73   return ret;
  74 }
  75
  76 unsigned
  77 hook_buf(unsigned i)
  78 {
  79   return (HOOK_DATA(i));
  80 }
  81
  82 void print_str( const char *str ) {
  83   int i;
  84   for (i=1; str[i]; i++);         /* find null at end of string */
  85   hook_call(hook_print_str, i, str);
  86 }
  87
  88 // --------------------------------------------------------------- CPU_KICK_DOG
  89 void CPU_KICK_DOG(void) {
  90   (void) hook_call( hook_kick_dog, 0 );
  91 }
  92
  93 // ------------------------------------------------------- CPU_WATCHDOG_TIMEOUT
  94 void CPU_WATCHDOG_TIMEOUT( unsigned t ) {
  95   (void) hook_call( hook_dog_timeout, 1, t );
  96 }