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Merged from sys/boot/i386/libi386/biosdisk.c revision 1.31.

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This commit is contained in:
nyan 2000-07-14 04:23:45 +00:00
parent 1293199940
commit 9563771e2e
1 changed files with 95 additions and 30 deletions
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107
sys/boot/pc98/libpc98/biosdisk.c
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@ -48,6 +48,7 @@
#include <btxv86.h>
#include "libi386.h"
#define BIOS_NUMDRIVES 0x475
#define BIOSDISK_SECSIZE 512
#define BUFSIZE (1 * BIOSDISK_SECSIZE)
#define MAXBDDEV MAXDEV
@ -161,24 +162,20 @@ bd_unit2bios(int unit)
/*
* Quiz the BIOS for disk devices, save a little info about them.
*
* XXX should we be consulting the BIOS equipment list, specifically
* the value at 0x475?
*/
static int
bd_init(void)
{
int base, unit;
#ifdef PC98
int base, unit;
int da_drive=0, n=-0x10;
/* sequence 0x90, 0x80, 0xa0 */
for (base = 0x90; base <= 0xa0; base += n, n += 0x30) {
for (unit = base; (nbdinfo < MAXBDDEV) || ((unit & 0x0f) < 4); unit++) {
bdinfo[nbdinfo].bd_unit = unit;
bdinfo[nbdinfo].bd_flags = (unit & 0xf0) == 0x90 ? BD_FLOPPY : 0;
/* XXX add EDD probes */
if (!bd_int13probe(&bdinfo[nbdinfo])){
if (((unit & 0xf0) == 0x90 && (unit & 0x0f) < 4) ||
((unit & 0xf0) == 0xa0 && (unit & 0x0f) < 6))
@ -206,13 +203,19 @@ bd_init(void)
}
}
#else
int base, unit, nfd = 0;
/* sequence 0, 0x80 */
for (base = 0; base <= 0x80; base += 0x80) {
for (unit = base; (nbdinfo < MAXBDDEV); unit++) {
/* check the BIOS equipment list for number of fixed disks */
if((base == 0x80) &&
(nfd >= *(unsigned short *)PTOV(BIOS_NUMDRIVES)))
break;
bdinfo[nbdinfo].bd_unit = unit;
bdinfo[nbdinfo].bd_flags = (unit < 0x80) ? BD_FLOPPY : 0;
/* XXX add EDD probes */
if (!bd_int13probe(&bdinfo[nbdinfo]))
break;
@ -220,6 +223,8 @@ bd_init(void)
printf("BIOS drive %c: is disk%d\n",
(unit < 0x80) ? ('A' + unit) : ('C' + unit - 0x80), nbdinfo);
nbdinfo++;
if (base == 0x80)
nfd++;
}
}
#endif
@ -229,13 +234,12 @@ bd_init(void)
/*
* Try to detect a device supported by the legacy int13 BIOS
*/
static int
bd_int13probe(struct bdinfo *bd)
{
#ifdef PC98
int addr;
if (bd->bd_flags & BD_FLOPPY) {
addr = 0xa155c;
} else {
@ -260,10 +264,23 @@ bd_int13probe(struct bdinfo *bd)
((v86.edx & 0xff) > (bd->bd_unit & 0x7f))) { /* unit # OK */
bd->bd_flags |= BD_MODEINT13;
bd->bd_type = v86.ebx & 0xff;
/* Determine if we can use EDD with this device. */
v86.eax = 0x4100;
v86.edx = bd->bd_unit;
v86.ebx = 0x55aa;
v86int();
if (!(v86.efl & 0x1) && /* carry clear */
((v86.ebx & 0xffff) == 0xaa55) && /* signature */
(v86.ecx & 0x1)) { /* packets mode ok */
bd->bd_flags |= BD_MODEEDD1;
if(v86.eax & 0xff00 > 0x300)
bd->bd_flags |= BD_MODEEDD3;
}
return(1);
}
#endif
return(0);
#endif
}
/*
@ -362,19 +379,28 @@ bd_printslice(struct open_disk *od, struct dos_partition *dp, char *prefix)
case DOSPTYP_EXT:
return;
case 0x01:
sprintf(line, "%s: FAT-12\n", prefix);
sprintf(line, "%s: FAT-12 %.6dMB (%d - %d)\n", prefix,
dp->dp_size / 2048, /* 512-byte sector assumption */
dp->dp_start, dp->dp_start + dp->dp_size);
break;
case 0x04:
case 0x06:
case 0x0e:
sprintf(line, "%s: FAT-16\n", prefix);
sprintf(line, "%s: FAT-16 %.6dMB (%d - %d)\n", prefix,
dp->dp_size / 2048, /* 512-byte sector assumption */
dp->dp_start, dp->dp_start + dp->dp_size);
break;
case 0x0b:
case 0x0c:
sprintf(line, "%s: FAT-32\n", prefix);
sprintf(line, "%s: FAT-32 %.6dMB (%d - %d)\n", prefix,
dp->dp_size / 2048, /* 512-byte sector assumption */
dp->dp_start, dp->dp_start + dp->dp_size);
break;
default:
sprintf(line, "%s: Unknown fs: 0x%x\n", prefix, dp->dp_typ);
sprintf(line, "%s: Unknown fs: 0x%x %.6dMB (%d - %d)\n",
prefix, dp->dp_typ,
dp->dp_size / 2048, /* 512-byte sector assumption */
dp->dp_start, dp->dp_start + dp->dp_size);
}
pager_output(line);
}
@ -393,18 +419,21 @@ bd_printbsdslice(struct open_disk *od, int offset, char *prefix)
return;
lp =(struct disklabel *)(&buf[0]);
if (lp->d_magic != DISKMAGIC) {
sprintf(line, "bad disklabel\n");
sprintf(line, "%s: FFS bad disklabel\n", prefix);
pager_output(line);
return;
}
/* Print partitions */
for (i = 0; i < lp->d_npartitions; i++) {
if ((lp->d_partitions[i].p_fstype == FS_BSDFFS) || (lp->d_partitions[i].p_fstype == FS_SWAP) ||
if ((lp->d_partitions[i].p_fstype == FS_BSDFFS) ||
(lp->d_partitions[i].p_fstype == FS_SWAP) ||
(lp->d_partitions[i].p_fstype == FS_VINUM) ||
((lp->d_partitions[i].p_fstype == FS_UNUSED) &&
(od->od_flags & BD_FLOPPY) && (i == 0))) { /* Floppies often have bogus fstype, print 'a' */
sprintf(line, " %s%c: %s %.6dMB (%d - %d)\n", prefix, 'a' + i,
(lp->d_partitions[i].p_fstype == FS_SWAP) ? "swap" : "FFS",
(lp->d_partitions[i].p_fstype == FS_SWAP) ? "swap" :
(lp->d_partitions[i].p_fstype == FS_VINUM) ? "vinum" : "FFS",
lp->d_partitions[i].p_size / 2048, /* 512-byte sector assumption */
lp->d_partitions[i].p_offset, lp->d_partitions[i].p_offset + lp->d_partitions[i].p_size);
pager_output(line);
@ -531,8 +560,10 @@ bd_opendisk(struct open_disk **odp, struct i386_devdesc *dev)
*/
bcopy(buf + DOSPARTOFF, &od->od_slicetab,
sizeof(struct dos_partition) * NDOSPART);
#ifdef PC98
od->od_nslices = NDOSPART; /* extended slices start here */
#ifndef PC98
#else
od->od_nslices = 4; /* extended slices start here */
for (i = 0; i < NDOSPART; i++)
bd_checkextended(od, i);
#endif
@ -960,9 +991,8 @@ bd_read(struct open_disk *od, daddr_t dblk, int blks, caddr_t dest)
v86int();
}
/* build request XXX support EDD requests too */
v86.ctl = V86_FLAGS;
#ifdef PC98
v86.ctl = V86_FLAGS;
v86.addr = 0x1b;
if (od->od_flags & BD_FLOPPY) {
v86.eax = 0xd600 | od->od_unit;
@ -976,19 +1006,54 @@ bd_read(struct open_disk *od, daddr_t dblk, int blks, caddr_t dest)
v86.ebx = x * BIOSDISK_SECSIZE;
v86.es = VTOPSEG(xp);
v86.ebp = VTOPOFF(xp);
v86int();
result = (v86.efl & 0x1);
if (result == 0)
break;
#else
if(cyl > 1023) {
/* use EDD if the disk supports it, otherwise, return error */
if(od->od_flags & BD_MODEEDD1) {
static unsigned short packet[8];
packet[0] = 0x10;
packet[1] = x;
packet[2] = VTOPOFF(xp);
packet[3] = VTOPSEG(xp);
packet[4] = dblk & 0xffff;
packet[5] = dblk >> 16;
packet[6] = 0;
packet[7] = 0;
v86.ctl = V86_FLAGS;
v86.addr = 0x13;
v86.eax = 0x4200;
v86.edx = od->od_unit;
v86.ds = VTOPSEG(packet);
v86.esi = VTOPOFF(packet);
v86int();
result = (v86.efl & 0x1);
if(result == 0)
break;
} else {
result = 1;
break;
}
} else {
/* Use normal CHS addressing */
v86.ctl = V86_FLAGS;
v86.addr = 0x13;
v86.eax = 0x200 | x;
v86.ecx = ((cyl & 0xff) << 8) | ((cyl & 0x300) >> 2) | sec;
v86.edx = (hd << 8) | od->od_unit;
v86.es = VTOPSEG(xp);
v86.ebx = VTOPOFF(xp);
#endif
v86int();
result = (v86.efl & 0x1);
if (result == 0)
break;
}
#endif
}
#ifdef PC98
DEBUG("%d sectors from %d/%d/%d to %p (0x%x) %s", x, cyl, hd, od->od_flags & BD_FLOPPY ? sec - 1 : sec, p, VTOP(p), result ? "failed" : "ok");