/*
* Set the PROM vector handler (for g0, g4, etc.)
* and set boothowto from the PROM arg strings.
*
* Note, args are always:
* argv[0] = boot_device (i.e. "sd(0,0,0)")
* argv[1] = options (i.e. "-ds" or NULL)
* argv[2] = NULL
*/
void
sunmon_init(void)
{
struct sunromvec *rvec;
struct bootparam *bp;
char **argp;
char *p;
rvec = romVectorPtr;
bp = *rvec->bootParam;
/* Save the PROM monitor Vector Base Register (VBR). */
sunmon_vbr = getvbr();
/* Arrange for "trap #14" to cause a PROM abort. */
sunmon_vbr[32+14] = romVectorPtr->abortEntry;
/* Save and replace the "v command" handler. */
sunmon_vcmd = *rvec->vector_cmd;
if (rvec->romvecVersion >= 2)
*rvec->vector_cmd = v_handler;
/* Set boothowto flags from PROM args. */
argp = bp->argPtr;
/* Skip argp[0] (the device string) */
argp++;
/* Have options? */
if (*argp == NULL)
return;
p = *argp;
if (*p == '-') {
/* yes, parse options */
#ifdef DEBUG
mon_printf("boot option: %s\n", p);
#endif
for (++p; *p; p++)
BOOT_FLAG(*p, boothowto);
argp++;
}
#ifdef DEBUG
/* Have init name? */
if (*argp == NULL)
return;
p = *argp;
mon_printf("boot initpath: %s\n", p);
#endif
}
/*
* This is called by SRT0.S
* to do final prep for main
*/
void
_start(void)
{
void **vbr;
int x;
/*
* Determine sun2 vs sun3 vs sun3x by looking where the
* vector base register points. The PROM always
* points that somewhere into [MONSTART..MONEND]
* which is a different range on each.
*/
vbr = getvbr();
x = (int)vbr & 0xFFF00000;
if (x == SUN3X_MONSTART)
_is3x = 1;
else if (x == 0)
_is2 = 1;
/* Find the PROM vector. */
if (_is3x)
x = SUN3X_PROM_BASE;
else if (_is2)
x = SUN2_PROM_BASE;
else
x = SUN3_PROM_BASE;
_romvec = ((struct sunromvec *) x);
/* Setup trap 14 for use as a breakpoint. */
vbr[32+14] = _romvec->abortEntry;
/* Initialize sun3 vs sun3x function pointers. */
if (_is3x)
sun3x_init();
else if (_is2)
sun2_init();
else
sun3_init();
main(0);
exit(0);
}
