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Function to collect geometry and partitioning information about the

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BIOS-known disks in a "bootinfo" structure (still experimental).
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drochner 1997-09-17 18:30:51 +00:00
parent c65435feb3
commit 0c825594ef
1 changed files with 80 additions and 0 deletions
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sys/arch/i386/stand/lib/bootinfo_biosgeom.c Normal file
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/* $NetBSD: bootinfo_biosgeom.c,v 1.1 1997/09/17 18:30:51 drochner Exp $ */
/*
* Copyright (c) 1997
* Matthias Drochner. 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 for the NetBSD Project
* by Matthias Drochner.
* 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 AUTHOR 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/types.h>
#include <machine/disklabel.h>
#include <lib/libkern/libkern.h>
#include <lib/libsa/stand.h>
#include "libi386.h"
#include "biosdisk_ll.h"
#include "bootinfo.h"
void bi_getbiosgeom()
{
unsigned char nhd;
struct btinfo_biosgeom *bibg;
int i;
pvbcopy(0x400 + 0x75, &nhd, 1); /* from BIOS data area */
if(nhd == 0 || nhd > 4 /* ??? */ )
return;
bibg = alloc(sizeof(struct btinfo_biosgeom)
+ (nhd - 1) * sizeof(struct bi_biosgeom_entry));
if(!bibg) return;
bibg->num = nhd;
for(i = 0; i < nhd; i++) {
struct biosdisk_ll d;
char buf[BIOSDISK_SECSIZE];
d.dev = 0x80 + i;
set_geometry(&d);
bibg->disk[i].spc = d.spc;
bibg->disk[i].spt = d.spt;
bzero(bibg->disk[i].dosparts,
sizeof(bibg->disk[i].dosparts));
if(readsects(&d, 0, 1, buf, 0))
continue;
bcopy(&buf[DOSPARTOFF], bibg->disk[i].dosparts,
sizeof(bibg->disk[i].dosparts));
}
BI_ADD(bibg, BTINFO_BIOSGEOM, sizeof(struct btinfo_biosgeom)
+ (nhd - 1) * sizeof(struct bi_biosgeom_entry));
}