108 lines
2.1 KiB
C
108 lines
2.1 KiB
C
/*
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* ----------------------------------------------------------------------------
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* "THE BEER-WARE LICENSE" (Revision 42):
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* <phk@FreeBSD.org> wrote this file. As long as you retain this notice you
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* can do whatever you want with this stuff. If we meet some day, and you think
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* this stuff is worth it, you can buy me a beer in return. Poul-Henning Kamp
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* ----------------------------------------------------------------------------
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <string.h>
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#include <sys/types.h>
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#include "libdisk.h"
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void
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Set_Bios_Geom(struct disk *disk, u_long cyl, u_long hd, u_long sect)
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{
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disk->bios_cyl = cyl;
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disk->bios_hd = hd;
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disk->bios_sect = sect;
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}
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void
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Sanitize_Bios_Geom(struct disk *disk)
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{
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int sane;
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sane = 1;
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#ifdef PC98
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if (disk->bios_cyl >= 65536)
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#else
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if (disk->bios_cyl > 1024)
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#endif
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sane = 0;
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if (disk->bios_hd > 16)
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sane = 0;
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#ifdef PC98
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if (disk->bios_sect >= 256)
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#else
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if (disk->bios_sect > 63)
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#endif
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sane = 0;
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if (disk->bios_cyl*disk->bios_hd*disk->bios_sect != disk->chunks->size)
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sane = 0;
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if (sane)
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return;
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/* First try something that IDE can handle */
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disk->bios_sect = 63;
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disk->bios_hd = 16;
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disk->bios_cyl = disk->chunks->size / (disk->bios_sect*disk->bios_hd);
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#ifdef PC98
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if (disk->bios_cyl < 65536)
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#else
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if (disk->bios_cyl < 1024)
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#endif
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return;
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/* Hmm, try harder... */
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#ifdef PC98
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/* Assume standard SCSI parameter */
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disk->bios_sect = 128;
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disk->bios_hd = 8;
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#else
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disk->bios_hd = 255;
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#endif
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disk->bios_cyl = disk->chunks->size / (disk->bios_sect*disk->bios_hd);
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return;
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}
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void
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All_FreeBSD(struct disk *d, int force_all)
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{
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struct chunk *c;
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int type;
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#ifdef PC98
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type = 0x494;
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#else
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type = 0xa5;
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#endif
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again:
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for (c = d->chunks->part; c; c = c->next)
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if (c->type != unused) {
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Delete_Chunk(d, c);
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goto again;
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}
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c = d->chunks;
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if (force_all) {
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Sanitize_Bios_Geom(d);
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Create_Chunk(d, c->offset, c->size, freebsd, type,
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CHUNK_FORCE_ALL, "FreeBSD");
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} else {
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Create_Chunk(d, c->offset, c->size, freebsd, type, 0,
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"FreeBSD");
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}
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}
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