OpenCores
URL https://opencores.org/ocsvn/minsoc/minsoc/trunk

Subversion Repositories minsoc

[/] [minsoc/] [trunk/] [sw/] [support/] [support.c] - Rev 36

Go to most recent revision | Compare with Previous | Blame | View Log

/* 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
 

Go to most recent revision | Compare with Previous | Blame | View Log

powered by: WebSVN 2.1.0

© copyright 1999-2019 OpenCores.org, equivalent to Oliscience, all rights reserved. OpenCores®, registered trademark.