116 lines
3.2 KiB
C
116 lines
3.2 KiB
C
/* $NetBSD: devopen.c,v 1.1.1.1 1997/03/14 02:40:31 perry 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/param.h>
|
|
|
|
#include <lib/libsa/stand.h>
|
|
|
|
#include <libi386.h>
|
|
#include <biosdisk.h>
|
|
|
|
static struct {
|
|
char *name;
|
|
int biosdev;
|
|
} biosdevtab[] = {
|
|
{"fd", 0},
|
|
{"wd", 0x80},
|
|
{"sd", 0x80},
|
|
{"hd", 0x80}
|
|
};
|
|
#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);
|
|
|
|
if(unit >= 4) /* ??? */
|
|
return(EUNIT);
|
|
|
|
return(0);
|
|
}
|
|
|
|
int
|
|
bios2dev(biosdev, devname, unit)
|
|
int biosdev;
|
|
char **devname;
|
|
unsigned int *unit;
|
|
{
|
|
if(biosdev & 0x80) /* call it "hd", we don't know better */
|
|
*devname = biosdevtab[3].name;
|
|
else
|
|
*devname = biosdevtab[0].name;
|
|
|
|
*unit = biosdev & 0x7f;
|
|
|
|
return(0);
|
|
}
|
|
|
|
/*
|
|
* 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;
|
|
return(biosdiskopen(f, biosdev, partition));
|
|
}
|