diff options
Diffstat (limited to 'sys/boot/pc98/boot2/disk.c')
| -rw-r--r-- | sys/boot/pc98/boot2/disk.c | 174 |
1 files changed, 0 insertions, 174 deletions
diff --git a/sys/boot/pc98/boot2/disk.c b/sys/boot/pc98/boot2/disk.c deleted file mode 100644 index 90ea121..0000000 --- a/sys/boot/pc98/boot2/disk.c +++ /dev/null @@ -1,174 +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 - */ -/* - * Ported to PC-9801 by Yoshio Kimura - */ - -/* - * 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 <sys/cdefs.h> -__FBSDID("$FreeBSD$"); - -#include "boot.h" -#include <sys/disklabel.h> -#include <sys/diskpc98.h> -#include <machine/bootinfo.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) - - -static int spt, spc; - -struct fs *fs; -struct inode inode; -int dosdev, unit, slice, part, maj, boff; - -/*#define EMBEDDED_DISKLABEL 1*/ - -/* 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; - -static char *Bread(int dosdev, int sector); - -int -devopen(void) -{ - struct pc98_partition *dptr; - struct disklabel *dl; - char *p; - int i, sector = 0, di, dosdev_copy; - - dosdev_copy = dosdev; - di = get_diskinfo(dosdev_copy); - spc = (spt = SPT(di)) * HEADS(di); - - if ((dosdev_copy & 0xf0) == 0x90) - { - boff = 0; - part = (spt == 15 ? 0 : 1); - } - else - { -#ifdef EMBEDDED_DISKLABEL - dl = &disklabel; -#else /* EMBEDDED_DISKLABEL */ - p = Bread(dosdev_copy, 1); - dptr = (struct pc98_partition *)p; - slice = WHOLE_DISK_SLICE; - for (i = 0; i < NDOSPART; i++, dptr++) - if (dptr->dp_mid == DOSMID_386BSD) { - slice = BASE_SLICE + i; - sector = dptr->dp_scyl * spc; - break; - } - p = Bread(dosdev, sector + LABELSECTOR); - dl=((struct disklabel *)p); - disklabel = *dl; /* structure copy (maybe useful later)*/ -#endif /* EMBEDDED_DISKLABEL */ - if (dl->d_magic != DISKMAGIC) { - printf("bad disklabel\n"); - return 1; - } - /* This little trick is for OnTrack DiskManager disks */ - boff = dl->d_partitions[part].p_offset - - dl->d_partitions[2].p_offset + sector; - } - - return 0; -} - - -/* - * Be aware that cnt is rounded up to N*BPS - */ -void -devread(char *iodest, int sector, int cnt) -{ - int offset; - char *p; - int dosdev_copy; - - for (offset = 0; offset < cnt; offset += BPS) - { - dosdev_copy = dosdev; - p = Bread(dosdev_copy, sector++); - memcpy(p, iodest+offset, BPS); - } -} - - -static char * -Bread(int dosdev, int 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: D:0x%x C:%d H:%d S:%d\n", - dosdev, cyl, head, sec); - twiddle(); - } - } - ra_dev = dosdev; - ra_first = sector; - ra_end = sector + nsec; - } - return (ra_buf + (sector - ra_first) * BPS); -} |
