NetBSD/sys/arch/i386/stand/biosboot/devopen.c

156 lines
4.0 KiB
C

/* $NetBSD: devopen.c,v 1.9 1999/10/28 05:20:05 mycroft Exp $ */
/*
* Copyright (c) 1996, 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>
#ifdef COMPAT_OLDBOOT
#include <sys/disklabel.h>
#endif
#include <lib/libsa/stand.h>
#include <lib/libkern/libkern.h>
#include <libi386.h>
#include <biosdisk.h>
#include "devopen.h"
#ifdef _STANDALONE
#include <bootinfo.h>
#endif
extern int parsebootfile __P((const char *, char**, char**, unsigned int*,
unsigned int*, const char**));
static int dev2bios __P((char *, unsigned int, int *));
static struct {
char *name;
int biosdev;
} biosdevtab[] = {
{
"fd", 0
},
{
"hd", 0x80
},
#ifdef COMPAT_OLDBOOT
{
"wd", 0x80
},
{
"sd", 0x80
}
#endif
};
#define NUMBIOSDEVS (sizeof(biosdevtab) / sizeof(biosdevtab[0]))
static int
dev2bios(devname, unit, biosdev)
char *devname;
unsigned int unit;
int *biosdev;
{
int i;
for (i = 0; i < NUMBIOSDEVS; i++)
if (!strcmp(devname, biosdevtab[i].name)) {
*biosdev = biosdevtab[i].biosdev + unit;
break;
}
if (i == NUMBIOSDEVS)
return (ENXIO);
return (0);
}
int
bios2dev(biosdev, devname, unit)
int biosdev;
char **devname;
unsigned int *unit;
{
if (biosdev & 0x80) {
#if defined(COMPAT_OLDBOOT) && defined(_STANDALONE)
extern struct disklabel disklabel;
if(disklabel.d_magic == DISKMAGIC) {
if(disklabel.d_type == DTYPE_SCSI)
*devname = biosdevtab[3].name;
else
*devname = biosdevtab[2].name;
} else
#endif
/* call it "hd", we don't know better */
*devname = biosdevtab[1].name;
} else
*devname = biosdevtab[0].name;
*unit = biosdev & 0x7f;
return (0);
}
#ifdef _STANDALONE
struct btinfo_bootpath bibp;
#endif
/*
* Open the BIOS disk device
*/
int
devopen(f, fname, file)
struct open_file *f;
const char *fname;
char **file;
{
char *fsname, *devname;
unsigned int unit, partition;
int biosdev;
int error;
struct devsw *dp;
if ((error = parsebootfile(fname, &fsname, &devname,
&unit, &partition, (const char **) file))
|| (error = dev2bios(devname, unit, &biosdev)))
return (error);
dp = &devsw[0]; /* must be biosdisk */
f->f_dev = dp;
#ifdef _STANDALONE
strncpy(bibp.bootpath, *file, sizeof(bibp.bootpath));
BI_ADD(&bibp, BTINFO_BOOTPATH, sizeof(bibp));
#endif
return (biosdiskopen(f, biosdev, partition));
}