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 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 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 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