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/*
* ----------------------------------------------------------------------------
* "THE BEER-WARE LICENSE" (Revision 42):
* <phk@FreeBSD.org> wrote this file. As long as you retain this notice you
* can do whatever you want with this stuff. If we meet some day, and you think
* this stuff is worth it, you can buy me a beer in return. Poul-Henning Kamp
* ----------------------------------------------------------------------------
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <string.h>
#include <sys/types.h>
#include "libdisk.h"
void
Set_Bios_Geom(struct disk *disk, u_long cyl, u_long hd, u_long sect)
{
disk->bios_cyl = cyl;
disk->bios_hd = hd;
disk->bios_sect = sect;
}
void
Sanitize_Bios_Geom(struct disk *disk)
{
int sane;
sane = 1;
if (disk->bios_cyl >= 65536)
sane = 0;
#ifdef PC98
if (disk->bios_hd >= 256)
sane = 0;
if (disk->bios_sect >= 256)
sane = 0;
#else
if (disk->bios_hd > 256)
sane = 0;
if (disk->bios_sect > 63)
sane = 0;
#endif
#if 0 /* Disable a check on a disk size. It's too strict. */
if (disk->bios_cyl * disk->bios_hd * disk->bios_sect !=
disk->chunks->size)
sane = 0;
#endif
if (sane)
return;
/* First try something that IDE can handle */
disk->bios_sect = 63;
disk->bios_hd = 16;
disk->bios_cyl = disk->chunks->size /
(disk->bios_sect * disk->bios_hd);
#ifdef PC98
if (disk->bios_cyl < 65536)
#else
if (disk->bios_cyl < 1024)
#endif
return;
/* Hmm, try harder... */
/* Assume standard SCSI parameter */
#ifdef PC98
disk->bios_sect = 128;
disk->bios_hd = 8;
#else
disk->bios_hd = 255;
#endif
disk->bios_cyl = disk->chunks->size /
(disk->bios_sect * disk->bios_hd);
#ifdef PC98
if (disk->bios_cyl < 65536)
return;
/* Assume UIDE-133/98-A Challenger BIOS 0.9821C parameter */
disk->bios_sect = 255;
disk->bios_hd = 16;
disk->bios_cyl = disk->chunks->size /
(disk->bios_sect * disk->bios_hd);
if (disk->bios_cyl < 65536)
return;
/* BIG-na-Drive? */
disk->bios_hd = 255;
disk->bios_cyl = disk->chunks->size /
(disk->bios_sect * disk->bios_hd);
#endif
}
void
All_FreeBSD(struct disk *d, int force_all)
{
struct chunk *c;
int type;
#ifdef PC98
type = 0xc494;
#else
type = 0xa5;
#endif
again:
for (c = d->chunks->part; c; c = c->next)
if (c->type != unused) {
Delete_Chunk(d, c);
goto again;
}
c = d->chunks;
if (force_all) {
Sanitize_Bios_Geom(d);
Create_Chunk(d, c->offset, c->size, freebsd, type,
CHUNK_FORCE_ALL, "FreeBSD");
} else {
Create_Chunk(d, c->offset, c->size, freebsd, type, 0,
"FreeBSD");
}
}
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