156 lines
4.0 KiB
C
156 lines
4.0 KiB
C
/* $NetBSD: devopen.c,v 1.7 1998/05/15 16:38:53 drochner Exp $ */
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/*
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* Copyright (c) 1996, 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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#include <sys/types.h>
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#ifdef COMPAT_OLDBOOT
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#include <sys/disklabel.h>
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#endif
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#include <lib/libsa/stand.h>
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#include <lib/libkern/libkern.h>
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#include <libi386.h>
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#include <biosdisk.h>
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#ifdef _STANDALONE
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#include <bootinfo.h>
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#endif
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extern int parsebootfile __P((const char *, char**, char**, unsigned int*,
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unsigned int*, const char**));
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static struct {
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char *name;
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int biosdev;
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} biosdevtab[] = {
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{
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"fd", 0
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},
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{
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"hd", 0x80
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},
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#ifdef COMPAT_OLDBOOT
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{
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"wd", 0x80
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},
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{
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"sd", 0x80
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}
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#endif
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};
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#define NUMBIOSDEVS (sizeof(biosdevtab) / sizeof(biosdevtab[0]))
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static int
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dev2bios(devname, unit, biosdev)
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char *devname;
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unsigned int unit;
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int *biosdev;
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{
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int i;
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for (i = 0; i < NUMBIOSDEVS; i++)
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if (!strcmp(devname, biosdevtab[i].name)) {
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*biosdev = biosdevtab[i].biosdev + unit;
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break;
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}
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if (i == NUMBIOSDEVS)
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return (ENXIO);
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if (unit >= 4) /* ??? */
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return (EUNIT);
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return (0);
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}
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int
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bios2dev(biosdev, devname, unit)
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int biosdev;
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char **devname;
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unsigned int *unit;
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{
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if (biosdev & 0x80) {
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#if defined(COMPAT_OLDBOOT) && defined(_STANDALONE)
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extern struct disklabel disklabel;
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if(disklabel.d_magic == DISKMAGIC) {
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if(disklabel.d_type == DTYPE_SCSI)
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*devname = biosdevtab[3].name;
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else
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*devname = biosdevtab[2].name;
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} else
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#endif
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/* call it "hd", we don't know better */
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*devname = biosdevtab[1].name;
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} else
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*devname = biosdevtab[0].name;
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*unit = biosdev & 0x7f;
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return (0);
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}
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#ifdef _STANDALONE
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struct btinfo_bootpath bibp;
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#endif
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/*
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* Open the BIOS disk device
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*/
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int
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devopen(f, fname, file)
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struct open_file *f;
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const char *fname;
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char **file;
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{
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char *fsname, *devname;
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unsigned int unit, partition;
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int biosdev;
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int error;
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struct devsw *dp;
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if ((error = parsebootfile(fname, &fsname, &devname,
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&unit, &partition, (const char **) file))
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|| (error = dev2bios(devname, unit, &biosdev)))
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return (error);
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dp = &devsw[0]; /* must be biosdisk */
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f->f_dev = dp;
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#ifdef _STANDALONE
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strncpy(bibp.bootpath, *file, sizeof(bibp.bootpath));
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BI_ADD(&bibp, BTINFO_BOOTPATH, sizeof(bibp));
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#endif
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return (biosdiskopen(f, biosdev, partition));
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}
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