1/*	$NetBSD: devopen.c,v 1.10 2005/12/11 12:17:48 christos Exp $	 */
2
3/*
4 * Copyright (c) 1996
5 *	Matthias Drochner.  All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28
29#include <lib/libsa/stand.h>
30#include <lib/libkern/libkern.h>
31#include <lib/libsa/ufs.h>
32
33#include <libi386.h>
34#include <biosdisk.h>
35#include <dosfile.h>
36#include <bootinfo.h>
37
38struct devsw devsw[] = {
39	{"disk", biosdisk_strategy, biosdisk_open, biosdisk_close, biosdisk_ioctl},
40};
41int ndevs = sizeof(devsw) / sizeof(struct devsw);
42
43static struct fs_ops dosfs = {
44	dos_open, dos_close, dos_read, dos_write, dos_seek, dos_stat
45};
46static struct fs_ops ufsfs = {
47	ufs_open, ufs_close, ufs_read, ufs_write, ufs_seek, ufs_stat
48};
49
50struct fs_ops   file_system[] = {
51	{0},
52};
53int  nfsys = 1;
54
55static struct {
56	char           *name;
57	int             biosdev;
58}               biosdevtab[] = {
59	{
60		"fd", 0
61	},
62	{
63		"wd", 0x80
64	},
65	{
66		"sd", 0x80
67	},
68	{
69		"hd", 0x80
70	}
71};
72#define NUMBIOSDEVS (sizeof(biosdevtab) / sizeof(biosdevtab[0]))
73
74static int dev2bios(char *, unsigned int, int *);
75
76static int
77dev2bios(char *devname, unsigned int unit, int *biosdev)
78{
79	unsigned             i;
80
81	for (i = 0; i < NUMBIOSDEVS; i++)
82		if (!strcmp(devname, biosdevtab[i].name)) {
83			*biosdev = biosdevtab[i].biosdev + unit;
84			if (unit >= 4)	/* ??? */
85				return (EUNIT);
86			return (0);
87		}
88	return (ENXIO);
89}
90
91struct btinfo_bootpath bibp;
92
93int
94devopen(struct open_file *f, const char *fname, char **file)
95{
96	char           *devname;
97	char           *fsmode;
98	int             unit, partition;
99	int             biosdev;
100	int             error;
101	struct devsw   *dp;
102
103	if ((error = parsebootfile(fname, &fsmode, &devname, &unit,
104	    &partition, (const char **) file)))
105		return (error);
106
107	if (!strcmp(fsmode, "dos")) {
108		file_system[0] = dosfs;	/* structure assignment! */
109		f->f_flags |= F_NODEV;	/* handled by DOS */
110		return (0);
111	} else if (!strcmp(fsmode, "ufs")) {
112		if ((error = dev2bios(devname, unit, &biosdev)))
113			return (error);
114		file_system[0] = ufsfs;	/* structure assignment! */
115		dp = &devsw[0];	/* must be biosdisk */
116		f->f_dev = dp;
117
118		strncpy(bibp.bootpath, *file, sizeof(bibp.bootpath));
119		BI_ADD(&bibp, BTINFO_BOOTPATH, sizeof(bibp));
120
121		return (biosdisk_open(f, biosdev, partition));
122	} else {
123		printf("no file system\n");
124		return (ENXIO);
125	}
126	/* NOTREACHED */
127}
128