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Subversion Repositories minsoc

[/] [minsoc/] [trunk/] [sw/] [support/] [support.c] - Rev 53

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/* Support */
 
#ifndef OR32
#include <sys/time.h>
#endif
 
#include "or1200.h"
#include "support.h"
#include "int.h"
 
#ifdef UART_PRINTF
#include "../drivers/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));
}
 
#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)
{
}
 
/* 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);
}
 
#endif
 

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