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/* $OpenBSD: diskprobe.c,v 1.7 1997/10/25 02:07:10 weingart Exp $ */
/*
* Copyright (c) 1997 Tobias Weingartner
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Tobias Weingartner.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*/
#include <sys/param.h>
#include <sys/reboot.h>
#include <sys/disklabel.h>
#include <stand/boot/bootarg.h>
#include <machine/biosvar.h>
#include <lib/libz/zlib.h>
#include "biosdev.h"
#include "libsa.h"
#define MAX_CKSUMLEN 32 /* Max amount of diskblocks used in cksum */
/* Local Prototypes */
static int disksum __P((int));
/* These get passed to kernel */
bios_diskinfo_t bios_diskinfo[16];
u_int32_t bios_cksumlen;
/* Probe for all BIOS disks */
void
diskprobe()
{
u_int drive, i = 0, rv;
struct disklabel label;
u_int unit, type;
printf("Probing disks:");
/* Floppies */
for(drive = 0; drive < 4; drive++) {
rv = bios_getinfo(drive, &bios_diskinfo[i]);
if(rv) {
#ifdef BIOS_DEBUG
printf(" <!fd%u>", drive);
#endif
break;
}
printf(" fd%u", drive);
/* Fill out best we can - (fd?) */
bios_diskinfo[i].bsd_dev = MAKEBOOTDEV(2, 0, 0, drive, 0);
i++;
}
#ifdef BIOS_DEBUG
printf("/");
#endif
/* Hard disks */
for(drive = 0x80; drive < 0x88; drive++) {
rv = bios_getinfo(drive, &bios_diskinfo[i]);
if(rv) {
#ifdef BIOS_DEBUG
printf(" <!hd%u>", drive);
#endif
break;
}
unit = drive - 0x80;
printf(" hd%u%s", unit, (bios_diskinfo[i].bios_edd > 0?"+":""));
/* Try to find the label, to figure out device type */
if((bios_getdisklabel(drive, &label)) ) {
printf("*");
type = 0; /* XXX let it be IDE */
} else {
/* Best guess */
switch (label.d_type) {
case DTYPE_SCSI:
type = 4;
bios_diskinfo[i].flags |= BDI_GOODLABEL;
break;
case DTYPE_ESDI:
case DTYPE_ST506:
type = 0;
bios_diskinfo[i].flags |= BDI_GOODLABEL;
break;
default:
bios_diskinfo[i].flags |= BDI_BADLABEL;
type = 0; /* XXX Suggest IDE */
}
}
/* Fill out best we can */
bios_diskinfo[i].bsd_dev = MAKEBOOTDEV(type, 0, 0, unit, 0);
i++;
}
/* End of list */
bios_diskinfo[i].bios_number = -1;
addbootarg(BOOTARG_DISKINFO,
(i + 1) * sizeof(bios_diskinfo[0]), bios_diskinfo);
/* Checksumming of hard disks */
for (i = 0; disksum(i) && i < MAX_CKSUMLEN; i++)
;
bios_cksumlen = i + 1;
addbootarg(BOOTARG_CKSUMLEN, sizeof(u_int32_t), &bios_cksumlen);
printf("\n");
}
/* Find info on given BIOS disk */
bios_diskinfo_t *
bios_dklookup(dev)
register int dev;
{
register int i;
for(i = 0; bios_diskinfo[i].bios_number != -1; i++)
if(bios_diskinfo[i].bios_number == dev)
return(&bios_diskinfo[i]);
return(NULL);
}
/*
* Checksum one more block on all harddrives
*
* Use the adler32() function from libz,
* as it is quick, small, and available.
*/
static int
disksum(blk)
int blk;
{
bios_diskinfo_t *bdi, *bd;
int st, reprobe = 0;
int hpc, spt, dev;
char *buf;
int cyl, head, sect;
buf = alloca(DEV_BSIZE);
for (bdi = bios_diskinfo; bdi->bios_number != -1; bdi++) {
/* Skip this disk if it is not a HD or has had an I/O error */
if (!(bdi->bios_number & 0x80) || bdi->flags & BDI_INVALID)
continue;
dev = bdi->bios_number;
hpc = bdi->bios_heads;
spt = bdi->bios_sectors;
/* Adler32 checksum */
btochs(blk, cyl, head, sect, hpc, spt);
st = biosd_io(F_READ, dev, cyl, head, sect, 1, buf);
if (st) {
bdi->flags |= BDI_INVALID;
continue;
}
bdi->checksum = adler32(bdi->checksum, buf, DEV_BSIZE);
for (bd = bios_diskinfo; bd != bdi; bd++)
if (bdi->checksum == bd->checksum)
reprobe = 1;
}
return (reprobe);
}
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