/* Find BIOS portion on given BIOS disk
* XXX - Use dklookup() instead.
*/
bios_diskinfo_t *
bios_dklookup(int dev)
{
struct diskinfo *dip;
dip = dklookup(dev);
if(dip)
return(&dip->bios_info);
return(NULL);
}
/* Find BIOS portion on given BIOS disk
* XXX - Use dklookup() instead.
*/
bios_diskinfo_t *
bios_dklookup(int dev)
{
struct diskinfo *dip;
dip = dklookup(dev);
if (dip)
return &dip->bios_info;
return NULL;
}
int
Xboot(void)
{
#ifdef EFIBOOT
printf("Not supported yet\n");
#else
int dev, part, st;
struct diskinfo *dip;
char buf[DEV_BSIZE], *dest = (void *)BOOTBIOS_ADDR;
if (cmd.argc != 2) {
printf("machine boot {fd,hd}<0123>[abcd]\n");
printf("Where [0123] is the disk number,"
" and [abcd] is the partition.\n");
return 0;
}
/* Check arg */
if (cmd.argv[1][0] != 'f' && cmd.argv[1][0] != 'h')
goto bad;
if (cmd.argv[1][1] != 'd')
goto bad;
if (cmd.argv[1][2] < '0' || cmd.argv[1][2] > '3')
goto bad;
if ((cmd.argv[1][3] < 'a' || cmd.argv[1][3] > 'd') &&
cmd.argv[1][3] != '\0')
goto bad;
printf("Booting from %s ", cmd.argv[1]);
dev = (cmd.argv[1][0] == 'h')?0x80:0;
dev += (cmd.argv[1][2] - '0');
part = (cmd.argv[1][3] - 'a');
if (part > 0)
printf("[%x,%d]\n", dev, part);
else
printf("[%x]\n", dev);
/* Read boot sector from device */
dip = dklookup(dev);
st = dip->diskio(F_READ, dip, 0, 1, buf);
if (st)
goto bad;
/* Frob boot flag in buffer from HD */
if ((dev & 0x80) && (part > 0)){
int i, j;
for (i = 0, j = DOSPARTOFF; i < 4; i++, j += 16)
if (part == i)
buf[j] |= 0x80;
else
buf[j] &= ~0x80;
}
/* Load %dl, ljmp */
bcopy(buf, dest, DEV_BSIZE);
bootbuf(dest, dev);
bad:
printf("Invalid device!\n");
#endif
return 0;
}
