141 lines
4.0 KiB
C
141 lines
4.0 KiB
C
/* $NetBSD: devopen.c,v 1.3 1997/09/17 18:40:33 drochner Exp $ */
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/*
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* Copyright (c) 1996
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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 <lib/libsa/stand.h>
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#include <lib/libkern/libkern.h>
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#include <lib/libsa/ufs.h>
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#include <libi386.h>
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#include <biosdisk.h>
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#include <dosfile.h>
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#include <bootinfo.h>
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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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struct devsw devsw[] = {
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{"disk", biosdiskstrategy, biosdiskopen, biosdiskclose, biosdiskioctl},
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};
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int ndevs = sizeof(devsw) / sizeof(struct devsw);
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static struct fs_ops dosfs = {
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dos_open, dos_close, dos_read, dos_write, dos_seek, dos_stat
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};
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static struct fs_ops ufsfs = {
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ufs_open, ufs_close, ufs_read, ufs_write, ufs_seek, ufs_stat
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};
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struct fs_ops file_system[] = {
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{0},
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};
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int nfsys = 1;
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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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"wd", 0x80
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},
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{
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"sd", 0x80
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},
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{
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"hd", 0x80
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}
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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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if (unit >= 4) /* ??? */
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return (EUNIT);
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return (0);
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}
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return (ENXIO);
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}
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struct btinfo_bootpath bibp;
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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 *devname;
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char *fsmode;
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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, &fsmode, &devname, &unit,
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&partition, (const char **) file)))
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return (error);
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if (!strcmp(fsmode, "dos")) {
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file_system[0] = dosfs; /* structure assignment! */
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f->f_flags |= F_NODEV; /* handled by DOS */
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return (0);
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} else if (!strcmp(fsmode, "ufs")) {
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if ((error = dev2bios(devname, unit, &biosdev)))
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return (error);
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file_system[0] = ufsfs; /* structure assignment! */
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dp = &devsw[0]; /* must be biosdisk */
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f->f_dev = dp;
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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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return (biosdiskopen(f, biosdev, partition));
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} else {
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printf("no file system\n");
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return (ENXIO);
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}
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/* NOTREACHED */
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}
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