Subversion Repositories openrisc

/* Support */
 
#include "spr_defs.h"
#include "support.h"
#include "int.h"
 
#if OR1K
void excpt_dummy();
void int_main();
 
unsigned long excpt_buserr = (unsigned long) excpt_dummy;
unsigned long excpt_dpfault = (unsigned long) excpt_dummy;
unsigned long excpt_ipfault = (unsigned long) excpt_dummy;
unsigned long excpt_tick = (unsigned long) excpt_dummy;
unsigned long excpt_align = (unsigned long) excpt_dummy;
unsigned long excpt_illinsn = (unsigned long) excpt_dummy;
unsigned long excpt_int = (unsigned long) int_main;
unsigned long excpt_dtlbmiss = (unsigned long) excpt_dummy;
unsigned long excpt_itlbmiss = (unsigned long) excpt_dummy;
unsigned long excpt_range = (unsigned long) excpt_dummy;
unsigned long excpt_syscall = (unsigned long) excpt_dummy;
unsigned long excpt_break = (unsigned long) excpt_dummy;
unsigned long excpt_trap = (unsigned long) excpt_dummy;
 
 
/* Start function, called by reset exception handler.  */
void reset ()
{
  int i = main();
  exit (i);  
}
 
/* return value by making a syscall */
void exit (int i)
{
  __asm__ __volatile__ ("l.add r3,r0,%0\n\t"
                        "l.nop %1": : "r" (i), "K" (NOP_EXIT));
  while (1);
}
 
/* activate printf support in simulator */
void printf(const char *fmt, ...)
{
  va_list args;
  va_start(args, fmt);
  __asm__ __volatile__ ("l.addi\tr3,%0,0\n\t"
                        "l.addi\tr4,%1,0\n\t"
                        "l.nop  %2"
                        : : "r" (fmt), "r" (args), "K" (NOP_PRINTF)
                        : "r3", "r4");
}
 
/* print long */
void report(unsigned long value)
{
  __asm__ __volatile__ ("l.addi\tr3,%0,0\n\t"
                        "l.nop %1": : "r" (value), "K" (NOP_REPORT));
}
 
/* just to satisfy linker */
void __main()
{
}
 
/* start_TIMER                    */
void start_timer(int x)
{
}
 
/* read_TIMER                    */
/*  Returns a value since started in uS */
unsigned int read_timer(int x)
{
  unsigned long count = 0;
 
  /* Read the Time Stamp Counter */
/*        asm("simrdtsc %0" :"=r" (count)); */
  /*asm("l.sys 201"); */
  return count;
}
 
/* For writing into SPR. */
void mtspr(unsigned long spr, unsigned long value)
{	
  __asm__ __volatile__ ("l.mtspr\t\t%0,%1,0": : "r" (spr), "r" (value));
}
 
/* For reading SPR. */
unsigned long mfspr(unsigned long spr)
{	
  unsigned long value;
  __asm__ __volatile__ ("l.mfspr\t\t%0,%1,0" : "=r" (value) : "r" (spr));
  return value;
}
 
#else
void report(unsigned long value)
{
  printf("report(0x%x);\n", (unsigned) value);
}
 
/* start_TIMER                    */
void start_timer(int tmrnum)
{
}
 
/* read_TIMER                    */
/*  Returns a value since started in uS */
unsigned int read_timer(int tmrnum)
{
  struct timeval tv;
  struct timezone tz;
 
  gettimeofday(&tv, &tz);
 
  return(tv.tv_sec*1000000+tv.tv_usec);
}
 
#endif
 
void *memcpy (void *__restrict dstvoid,
              __const void *__restrict srcvoid, size_t length)
{
  char *dst = dstvoid;
  const char *src = (const char *) srcvoid;
 
  while (length--)
    *dst++ = *src++;
  return dst;
}
 
void excpt_dummy() {}