devopen.c revision 1.4
1 /* $NetBSD: devopen.c,v 1.4 2005/06/22 06:06:34 junyoung 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 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /* 40 * Copyright (c) 1996, 1997 41 * Matthias Drochner. All rights reserved. 42 * 43 * Redistribution and use in source and binary forms, with or without 44 * modification, are permitted provided that the following conditions 45 * are met: 46 * 1. Redistributions of source code must retain the above copyright 47 * notice, this list of conditions and the following disclaimer. 48 * 2. Redistributions in binary form must reproduce the above copyright 49 * notice, this list of conditions and the following disclaimer in the 50 * documentation and/or other materials provided with the distribution. 51 * 52 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 53 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 54 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 55 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 56 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 57 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 58 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 59 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 60 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 61 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 62 */ 63 64 65 #include <sys/types.h> 66 67 #include <lib/libsa/stand.h> 68 #include <lib/libkern/libkern.h> 69 70 #include <libi386.h> 71 #include <biosdisk.h> 72 #include "devopen.h" 73 #ifdef _STANDALONE 74 #include <bootinfo.h> 75 #endif 76 #ifdef SUPPORT_PS2 77 #include <biosmca.h> 78 #endif 79 80 static int dev2bios(char *, int, int *); 81 82 static int 83 dev2bios(char *devname, int unit, int *biosdev) 84 { 85 86 if (strcmp(devname, "hd") == 0) 87 *biosdev = 0x80 + unit; 88 else if (strcmp(devname, "fd") == 0) 89 *biosdev = 0x00 + unit; 90 else if (strcmp(devname, "cd") == 0) 91 *biosdev = boot_biosdev; 92 else 93 return ENXIO; 94 95 return 0; 96 } 97 98 void 99 bios2dev(int biosdev, u_int sector, char **devname, int *unit, int *partition) 100 { 101 102 /* set default */ 103 *unit = biosdev & 0x7f; 104 105 if (biosdev & 0x80) { 106 /* 107 * There seems to be no standard way of numbering BIOS 108 * CD-ROM drives. The following method is a little tricky 109 * but works nicely. 110 */ 111 if (biosdev >= 0x80 + get_harddrives()) { 112 *devname = "cd"; 113 *unit = 0; /* override default */ 114 } else 115 *devname = "hd"; 116 } else 117 *devname = "fd"; 118 119 *partition = biosdisk_findpartition(biosdev, sector); 120 } 121 122 #ifdef _STANDALONE 123 struct btinfo_bootpath bibp; 124 #endif 125 126 /* 127 * Open the BIOS disk device 128 */ 129 int 130 devopen(struct open_file *f, const char *fname, char **file) 131 { 132 char *fsname, *devname; 133 int unit, partition; 134 int biosdev; 135 int error; 136 137 if ((error = parsebootfile(fname, &fsname, &devname, 138 &unit, &partition, (const char **) file)) 139 || (error = dev2bios(devname, unit, &biosdev))) 140 return error; 141 142 f->f_dev = &devsw[0]; /* must be biosdisk */ 143 144 #ifdef _STANDALONE 145 strncpy(bibp.bootpath, *file, sizeof(bibp.bootpath)); 146 BI_ADD(&bibp, BTINFO_BOOTPATH, sizeof(bibp)); 147 #endif 148 149 return biosdisk_open(f, biosdev, partition); 150 } 151
Indexes created Tue Sep 30 11:09:46 GMT 2025