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-rw-r--r--sys/i386/boot/disk.c281
1 files changed, 0 insertions, 281 deletions
diff --git a/sys/i386/boot/disk.c b/sys/i386/boot/disk.c
deleted file mode 100644
index a63ca5a..0000000
--- a/sys/i386/boot/disk.c
+++ /dev/null
@@ -1,281 +0,0 @@
-/*
- * Mach Operating System
- * Copyright (c) 1992, 1991 Carnegie Mellon University
- * All Rights Reserved.
- *
- * Permission to use, copy, modify and distribute this software and its
- * documentation is hereby granted, provided that both the copyright
- * notice and this permission notice appear in all copies of the
- * software, derivative works or modified versions, and any portions
- * thereof, and that both notices appear in supporting documentation.
- *
- * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
- * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
- * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
- *
- * Carnegie Mellon requests users of this software to return to
- *
- * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
- * School of Computer Science
- * Carnegie Mellon University
- * Pittsburgh PA 15213-3890
- *
- * any improvements or extensions that they make and grant Carnegie Mellon
- * the rights to redistribute these changes.
- *
- * from: Mach, Revision 2.2 92/04/04 11:35:49 rpd
- * $Id: disk.c,v 1.4 1994/02/22 22:59:40 rgrimes Exp $
- */
-
-/*
- * 93/10/08 bde
- * If there is no 386BSD partition, initialize the label sector with
- * LABELSECTOR instead of with garbage.
- *
- * 93/08/22 bde
- * Fixed reading of bad sector table. It is at the end of the 'c'
- * partition, which is not always at the end of the disk.
- */
-
-#include "boot.h"
-#ifdef DO_BAD144
-#include <sys/dkbad.h>
-#endif DO_BAD144
-#include <sys/disklabel.h>
-
-#define BIOS_DEV_FLOPPY 0x0
-#define BIOS_DEV_WIN 0x80
-
-#define BPS 512
-#define SPT(di) ((di)&0xff)
-#define HEADS(di) ((((di)>>8)&0xff)+1)
-
-char *devs[] = {"wd", "hd", "fd", "wt", "sd", 0};
-
-#ifdef DO_BAD144
-struct dkbad dkb;
-int do_bad144;
-int bsize;
-#endif DO_BAD144
-
-int spt, spc;
-
-char *iodest;
-struct fs *fs;
-struct inode inode;
-int dosdev, unit, part, maj, boff, poff, bnum, cnt;
-
-/*#define EMBEDDED_DISKLABEL 1*/
-extern struct disklabel disklabel;
-/*struct disklabel disklabel;*/
-
-devopen()
-{
- struct dos_partition *dptr;
- struct disklabel *dl;
- int dosdev = inode.i_dev;
- int i, sector, di;
-
- di = get_diskinfo(dosdev);
- spc = (spt = SPT(di)) * HEADS(di);
- if (dosdev == 2)
- {
- boff = 0;
- part = (spt == 15 ? 3 : 1);
- }
- else
- {
-#ifdef EMBEDDED_DISKLABEL
- dl = &disklabel;
-#else EMBEDDED_DISKLABEL
- Bread(dosdev, 0);
- dptr = (struct dos_partition *)(((char *)0)+DOSPARTOFF);
- sector = LABELSECTOR;
- for (i = 0; i < NDOSPART; i++, dptr++)
- if (dptr->dp_typ == DOSPTYP_386BSD) {
- sector = dptr->dp_start + LABELSECTOR;
- break;
- }
- Bread(dosdev, sector++);
- dl=((struct disklabel *)0);
- disklabel = *dl; /* structure copy (maybe useful later)*/
-#endif EMBEDDED_DISKLABEL
- if (dl->d_magic != DISKMAGIC) {
- printf("bad disklabel");
- return 1;
- }
- if( (maj == 4) || (maj == 0) || (maj == 1))
- {
- if (dl->d_type == DTYPE_SCSI)
- {
- maj = 4; /* use scsi as boot dev */
- }
- else
- {
- maj = 0; /* must be ESDI/IDE */
- }
- }
- boff = dl->d_partitions[part].p_offset;
-#ifdef DO_BAD144
- bsize = dl->d_partitions[part].p_size;
- do_bad144 = 0;
- if (dl->d_flags & D_BADSECT) {
- /* this disk uses bad144 */
- int i;
- int dkbbnum;
- struct dkbad *dkbptr;
-
- /* find the first readable bad sector table */
- /* some of this code is copied from ufs/ufs_disksubr.c */
- /* including the bugs :-( */
- /* read a bad sector table */
-
-#define BAD144_PART 2 /* XXX scattered magic numbers */
-#define BSD_PART 0 /* XXX should be 2 but bad144.c uses 0 */
- if (dl->d_partitions[BSD_PART].p_offset != 0)
- dkbbnum = dl->d_partitions[BAD144_PART].p_offset
- + dl->d_partitions[BAD144_PART].p_size;
- else
- dkbbnum = dl->d_secperunit;
- dkbbnum -= dl->d_nsectors;
-
- if (dl->d_secsize > DEV_BSIZE)
- dkbbnum *= dl->d_secsize / DEV_BSIZE;
- else
- dkbbnum /= DEV_BSIZE / dl->d_secsize;
- i = 0;
- do_bad144 = 0;
- do {
- /* XXX: what if the "DOS sector" < 512 bytes ??? */
- Bread(dosdev, dkbbnum + i);
- dkbptr = (struct dkbad *) 0;
-/* XXX why is this not in <sys/dkbad.h> ??? */
-#define DKBAD_MAGIC 0x4321
- if (dkbptr->bt_mbz == 0 &&
- dkbptr->bt_flag == DKBAD_MAGIC) {
- dkb = *dkbptr; /* structure copy */
- do_bad144 = 1;
- break;
- }
- i += 2;
- } while (i < 10 && i < dl->d_nsectors);
- if (!do_bad144)
- printf("Bad bad sector table\n");
- else
- printf("Using bad sector table at %d\n", dkbbnum+i);
- }
-#endif DO_BAD144
- }
- return 0;
-}
-
-devread()
-{
- int offset, sector = bnum;
- int dosdev = inode.i_dev;
- for (offset = 0; offset < cnt; offset += BPS)
- {
- Bread(dosdev, badsect(dosdev, sector++));
- bcopy(0, iodest+offset, BPS);
- }
-}
-
-#define I_ADDR ((void *) 0) /* XXX where all reads go */
-
-/* Read ahead buffer large enough for one track on a 1440K floppy. For
- * reading from floppies, the bootstrap has to be loaded on a 64K boundary
- * to ensure that this buffer doesn't cross a 64K DMA boundary.
- */
-#define RA_SECTORS 18
-static char ra_buf[RA_SECTORS * BPS];
-static int ra_dev;
-static int ra_end;
-static int ra_first;
-
-Bread(dosdev,sector)
- int dosdev,sector;
-{
- if (dosdev != ra_dev || sector < ra_first || sector >= ra_end)
- {
- int cyl, head, sec, nsec;
-
- cyl = sector/spc;
- head = (sector % spc) / spt;
- sec = sector % spt;
- nsec = spt - sec;
- if (nsec > RA_SECTORS)
- nsec = RA_SECTORS;
- twiddle();
- if (biosread(dosdev, cyl, head, sec, nsec, ra_buf) != 0)
- {
- nsec = 1;
- twiddle();
- while (biosread(dosdev, cyl, head, sec, nsec, ra_buf) != 0) {
- printf("Error: C:%d H:%d S:%d\n", cyl, head, sec);
- twiddle();
- }
- }
- ra_dev = dosdev;
- ra_first = sector;
- ra_end = sector + nsec;
- }
- bcopy(ra_buf + (sector - ra_first) * BPS, I_ADDR, BPS);
-}
-
-badsect(dosdev, sector)
- int dosdev, sector;
-{
- int i;
-#ifdef DO_BAD144
- if (do_bad144) {
- u_short cyl;
- u_short head;
- u_short sec;
- int newsec;
- struct disklabel *dl = &disklabel;
-
- /* XXX */
- /* from wd.c */
- /* bt_cyl = cylinder number in sorted order */
- /* bt_trksec is actually (head << 8) + sec */
-
- /* only remap sectors in the partition */
- if (sector < boff || sector >= boff + bsize) {
- goto no_remap;
- }
-
- cyl = sector / dl->d_secpercyl;
- head = (sector % dl->d_secpercyl) / dl->d_nsectors;
- sec = sector % dl->d_nsectors;
- sec = (head<<8) + sec;
-
- /* now, look in the table for a possible bad sector */
- for (i=0; i<126; i++) {
- if (dkb.bt_bad[i].bt_cyl == cyl) {
- /* found same cylinder */
- if (dkb.bt_bad[i].bt_trksec == sec) {
- /* FOUND! */
- break;
- }
- } else if (dkb.bt_bad[i].bt_cyl > cyl) {
- i = 126;
- break;
- }
- }
- if (i == 126) {
- /* didn't find bad sector */
- goto no_remap;
- }
- /* otherwise find replacement sector */
- if (dl->d_partitions[BSD_PART].p_offset != 0)
- newsec = dl->d_partitions[BAD144_PART].p_offset
- + dl->d_partitions[BAD144_PART].p_size;
- else
- newsec = dl->d_secperunit;
- newsec -= dl->d_nsectors + i + 1;
- return newsec;
- }
-#endif DO_BAD144
- no_remap:
- return sector;
-}
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