Subversion Repositories openrisc_2011-10-31

/* Support */

#include "spr-defs.h"

#include "support.h"

#include "common.h"

#include "int.h"

#include <ctype.h>

volatile unsigned long timestamp = 0;

void int_main(void);

/* return value by making a syscall */

void exit(int i)

{

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

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

        while (1) ;

}

/* activate printf support in simulator */

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

{

#if 0

        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):"r3", "r4");

#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(void)

{

}

/* 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;

}

/* Parses hex or decimal number */

unsigned long strtoul(const char *str, char **endptr, int base)

{

        {

                unsigned long number = 0;

                char *pos = (char *)str;

                char *fail_char = (char *)str;

                while (isspace(*pos))

                        pos++;  /* skip leading whitespace */

                if ((base == 16) && (*pos == '0')) {    /* handle option prefix */

                        ++pos;

                        fail_char = pos;

                        if ((*pos == 'x') || (*pos == 'X'))

                                ++pos;

                }

                if (base == 0) { /* dynamic base */

                        base = 10;      /* default is 10 */

                        if (*pos == '0') {

                                ++pos;

                                base -= 2;      /* now base is 8 (or 16) */

                                fail_char = pos;

                                if ((*pos == 'x') || (*pos == 'X')) {

                                        base += 8;      /* base is 16 */

                                        ++pos;

                                }

                        }

                }

                /* check for illegal base */

                if (!((base < 2) || (base > 36)))

                        while (1) {

                                int digit = 40;

                                if ((*pos >= '0') && (*pos <= '9')) {

                                        digit = (*pos - '0');

                                } else if (*pos >= 'a') {

                                        digit = (*pos - 'a' + 10);

                                } else if (*pos >= 'A') {

                                        digit = (*pos - 'A' + 10);

                                } else

                                        break;

                                if (digit >= base)

                                        break;

                                fail_char = ++pos;

                                number = number * base + digit;

                        }

                if (endptr)

                        *endptr = fail_char; {

                        return number;

                        }

        }

}

unsigned long get_timer(unsigned long base)

{

        /*

           __printf("%s - %s: %d\n", __FILE__, __FUNCTION__, __LINE__);

           __printf("   timestamp = %.8lx base = %.8lx\n", timestamp, base);

         */

        return (timestamp - base);

}

void set_timer(unsigned long t)

{

        timestamp = t;

}