81 lines
2.7 KiB
C
81 lines
2.7 KiB
C
/* $NetBSD: bootinfo_biosgeom.c,v 1.1 1997/09/17 18:30:51 drochner Exp $ */
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/*
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* Copyright (c) 1997
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* Matthias Drochner. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed for the NetBSD Project
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* by Matthias Drochner.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#include <sys/types.h>
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#include <machine/disklabel.h>
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#include <lib/libkern/libkern.h>
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#include <lib/libsa/stand.h>
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#include "libi386.h"
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#include "biosdisk_ll.h"
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#include "bootinfo.h"
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void bi_getbiosgeom()
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{
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unsigned char nhd;
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struct btinfo_biosgeom *bibg;
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int i;
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pvbcopy(0x400 + 0x75, &nhd, 1); /* from BIOS data area */
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if(nhd == 0 || nhd > 4 /* ??? */ )
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return;
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bibg = alloc(sizeof(struct btinfo_biosgeom)
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+ (nhd - 1) * sizeof(struct bi_biosgeom_entry));
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if(!bibg) return;
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bibg->num = nhd;
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for(i = 0; i < nhd; i++) {
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struct biosdisk_ll d;
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char buf[BIOSDISK_SECSIZE];
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d.dev = 0x80 + i;
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set_geometry(&d);
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bibg->disk[i].spc = d.spc;
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bibg->disk[i].spt = d.spt;
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bzero(bibg->disk[i].dosparts,
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sizeof(bibg->disk[i].dosparts));
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if(readsects(&d, 0, 1, buf, 0))
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continue;
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bcopy(&buf[DOSPARTOFF], bibg->disk[i].dosparts,
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sizeof(bibg->disk[i].dosparts));
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}
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BI_ADD(bibg, BTINFO_BIOSGEOM, sizeof(struct btinfo_biosgeom)
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+ (nhd - 1) * sizeof(struct bi_biosgeom_entry));
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}
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