Subversion Repositories minsoc

/* Support */

#ifndef OR32

#include <sys/time.h>

#endif

#include "spr_defs.h"

#include "support.h"

#include "int.h"

#ifdef UART_PRINTF

//#include "snprintf.h"

#include "vfnprintf.h"

#include "uart.h"

#endif

#if OR32

void int_main();

void ext_except()

{

        int_main();

}

/* Start function, called by reset exception handler.  */

void reset ()

{

  int i = main();

  or32_exit (i);

}

/* return value by making a syscall */

void or32_exit (int i)

{

  asm("l.add r3,r0,%0": : "r" (i));

  asm("l.nop %0": :"K" (NOP_EXIT));

  while (1);

}

#ifdef UART_PRINTF

static int uart_init_done = 0;

#define PRINTFBUFFER_SIZE 512

char PRINTFBUFFER[PRINTFBUFFER_SIZE]; // Declare a global printf buffer

void minsoc_printf(const char *fmt, ...)

{

  // init uart if not done already

  if (!uart_init_done)

    {

      uart_init();

      uart_init_done = 1;

    }

  va_list args;

  va_start(args, fmt);

  //int str_l = vsnprintf(PRINTFBUFFER, PRINTFBUFFER_SIZE, fmt, args);

  int str_l = vfnprintf(PRINTFBUFFER, PRINTFBUFFER_SIZE, fmt, args);

  if (!str_l) return; // no length string - just return

  int c=0;

  // now print each char via the UART

  while (c < str_l)

    uart_putc(PRINTFBUFFER[c++]);

  va_end(args);

}

#else

/* activate printf support in simulator */

void minsoc_printf(const char *fmt, ...)

{

  va_list args;

  va_start(args, fmt);

  __asm__ __volatile__ ("  l.addi\tr3,%1,0\n \

                           l.addi\tr4,%2,0\n \

                           l.nop %0": :"K" (NOP_PRINTF), "r" (fmt), "r"  (args));

}

/*

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;

}

*/

#endif

/* print long */

void report(unsigned long value)

{

  asm("l.addi\tr3,%0,0": :"r" (value));

  asm("l.nop %0": :"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("l.mtspr\t\t%0,%1,0": : "r" (spr), "r" (value));

}

/* For reading SPR. */

unsigned long mfspr(unsigned long spr)

{

  unsigned long value;

  asm("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