1 /* $NetBSD: devopen.c,v 1.10 2019/12/10 02:02:47 manu Exp $ */
2
3 /*-
4 * Copyright (c) 2005 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Bang Jun-Young.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32 /*
33 * Copyright (c) 1996, 1997
34 * Matthias Drochner. All rights reserved.
35 *
36 * Redistribution and use in source and binary forms, with or without
37 * modification, are permitted provided that the following conditions
38 * are met:
39 * 1. Redistributions of source code must retain the above copyright
40 * notice, this list of conditions and the following disclaimer.
41 * 2. Redistributions in binary form must reproduce the above copyright
42 * notice, this list of conditions and the following disclaimer in the
43 * documentation and/or other materials provided with the distribution.
44 *
45 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
46 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
47 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
48 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
49 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
50 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
51 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
52 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
53 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
54 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
55 */
56
57
58 #include <sys/types.h>
59
60 #include <lib/libsa/stand.h>
61 #include <lib/libkern/libkern.h>
62
63 #include <libi386.h>
64 #include <biosdisk.h>
65 #include "devopen.h"
66 #ifdef _STANDALONE
67 #include <bootinfo.h>
68 #endif
69 #ifdef SUPPORT_PS2
70 #include <biosmca.h>
71 #endif
72
73 static int dev2bios(char *, int, int *);
74
75 static int
dev2bios(char * devname,int unit,int * biosdev)76 dev2bios(char *devname, int unit, int *biosdev)
77 {
78
79 if (strcmp(devname, "hd") == 0)
80 *biosdev = 0x80 + unit;
81 else if (strcmp(devname, "fd") == 0)
82 *biosdev = 0x00 + unit;
83 else if (strcmp(devname, "cd") == 0)
84 *biosdev = boot_biosdev;
85 else
86 return ENXIO;
87
88 return 0;
89 }
90
91 void
bios2dev(int biosdev,daddr_t sector,char ** devname,int * unit,int * partition,const char ** part_name)92 bios2dev(int biosdev, daddr_t sector, char **devname, int *unit,
93 int *partition, const char **part_name)
94 {
95
96 /* set default */
97 *unit = biosdev & 0x7f;
98
99 if (biosdev & 0x80) {
100 /*
101 * There seems to be no standard way of numbering BIOS
102 * CD-ROM drives. The following method is a little tricky
103 * but works nicely.
104 */
105 if (biosdev >= 0x80 + get_harddrives()) {
106 *devname = "cd";
107 *unit = 0; /* override default */
108 } else
109 *devname = "hd";
110 } else
111 *devname = "fd";
112
113 (void)biosdisk_findpartition(biosdev, sector, partition, part_name);
114 }
115
116 #ifdef _STANDALONE
117 struct btinfo_bootpath bibp;
118 extern bool kernel_loaded;
119 #endif
120
121 /*
122 * Open the BIOS disk device
123 */
124 int
devopen(struct open_file * f,const char * fname,char ** file)125 devopen(struct open_file *f, const char *fname, char **file)
126 {
127 char *fsname, *devname;
128 int unit, partition;
129 int biosdev;
130 int error;
131
132 error = parsebootfile(fname, &fsname, &devname,
133 &unit, &partition, (const char **) file);
134 if (error)
135 return error;
136
137 f->f_dev = &devsw[0]; /* must be biosdisk */
138
139 #ifdef _STANDALONE
140 if (!kernel_loaded) {
141 strncpy(bibp.bootpath, *file, sizeof(bibp.bootpath));
142 BI_ADD(&bibp, BTINFO_BOOTPATH, sizeof(bibp));
143 }
144 #endif
145
146 #ifndef NO_GPT
147 /* Search by GPT label name */
148 if (strstr(devname, "NAME=") == devname) {
149 f->f_dev = &devsw[0]; /* must be biosdisk */
150
151 return biosdisk_open_name(f, devname);
152 }
153 #endif
154 #ifndef NO_RAIDFRAME
155 /* Search by raidframe name */
156 if (strstr(devname, "raid") == devname) {
157 f->f_dev = &devsw[0]; /* must be biosdisk */
158
159 return biosdisk_open_name(f, fname);
160 }
161 #endif
162
163 error = dev2bios(devname, unit, &biosdev);
164 if (error)
165 return error;
166
167 return biosdisk_open(f, biosdev, partition);
168 }
169