Subversion Repositories minsoc

/* Support */

#ifndef OR32

#include <sys/time.h>

#endif

#include "or1200.h"

#include "support.h"

#include "int.h"

#ifdef UART_PRINTF

#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));

}

#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