1 /* $NetBSD: devopen.c,v 1.8 2010/12/24 20:40:42 jakllsch 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, int *partition) 93 { 94 95 /* set default */ 96 *unit = biosdev & 0x7f; 97 98 if (biosdev & 0x80) { 99 /* 100 * There seems to be no standard way of numbering BIOS 101 * CD-ROM drives. The following method is a little tricky 102 * but works nicely. 103 */ 104 if (biosdev >= 0x80 + get_harddrives()) { 105 *devname = "cd"; 106 *unit = 0; /* override default */ 107 } else 108 *devname = "hd"; 109 } else 110 *devname = "fd"; 111 112 *partition = biosdisk_findpartition(biosdev, sector); 113 } 114 115 #ifdef _STANDALONE 116 struct btinfo_bootpath bibp; 117 extern bool kernel_loaded; 118 #endif 119 120 /* 121 * Open the BIOS disk device 122 */ 123 int 124 devopen(struct open_file *f, const char *fname, char **file) 125 { 126 char *fsname, *devname; 127 int unit, partition; 128 int biosdev; 129 int error; 130 131 if ((error = parsebootfile(fname, &fsname, &devname, 132 &unit, &partition, (const char **) file)) 133 || (error = dev2bios(devname, unit, &biosdev))) 134 return error; 135 136 f->f_dev = &devsw[0]; /* must be biosdisk */ 137 138 #ifdef _STANDALONE 139 if (!kernel_loaded) { 140 strncpy(bibp.bootpath, *file, sizeof(bibp.bootpath)); 141 BI_ADD(&bibp, BTINFO_BOOTPATH, sizeof(bibp)); 142 } 143 #endif 144 145 return biosdisk_open(f, biosdev, partition); 146 } 147