1 /* $NetBSD: devopen.c,v 1.1 2003/04/16 22:36:14 dsl Exp $ */ 2 3 /* 4 * Copyright (c) 1996, 1997 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 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed for the NetBSD Project 18 * by Matthias Drochner. 19 * 4. The name of the author may not be used to endorse or promote products 20 * derived from this software without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 25 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 27 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 31 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34 35 #include <sys/types.h> 36 37 #include <lib/libsa/stand.h> 38 #include <lib/libkern/libkern.h> 39 40 #include <libi386.h> 41 #include <biosdisk.h> 42 #include "devopen.h" 43 #ifdef _STANDALONE 44 #include <bootinfo.h> 45 #endif 46 #ifdef SUPPORT_PS2 47 #include <biosmca.h> 48 #endif 49 50 static __inline int dev2bios __P((char *, unsigned int, int *)); 51 52 static __inline int 53 dev2bios(devname, unit, biosdev) 54 char *devname; 55 unsigned int unit; 56 int *biosdev; 57 { 58 if (strcmp(devname, "hd") == 0) 59 *biosdev = 0x80 + unit; 60 else if (strcmp(devname, "fd") == 0) 61 *biosdev = 0x00 + unit; 62 else 63 return (ENXIO); 64 65 return (0); 66 } 67 68 int 69 bios2dev(int biosdev, char **devname, u_int *unit, u_int sector, u_int *ptnp) 70 { 71 if (biosdev & 0x80) 72 *devname = "hd"; 73 else 74 *devname = "fd"; 75 76 *unit = biosdev & 0x7f; 77 *ptnp = biosdiskfindptn(biosdev, sector); 78 79 return 0; 80 } 81 82 #ifdef _STANDALONE 83 struct btinfo_bootpath bibp; 84 #endif 85 86 /* 87 * Open the BIOS disk device 88 */ 89 int 90 devopen(f, fname, file) 91 struct open_file *f; 92 const char *fname; 93 char **file; 94 { 95 char *fsname, *devname; 96 unsigned int unit, partition; 97 int biosdev; 98 int error; 99 struct devsw *dp; 100 101 if ((error = parsebootfile(fname, &fsname, &devname, 102 &unit, &partition, (const char **) file)) 103 || (error = dev2bios(devname, unit, &biosdev))) 104 return (error); 105 106 dp = &devsw[0]; /* must be biosdisk */ 107 f->f_dev = dp; 108 109 #ifdef _STANDALONE 110 strncpy(bibp.bootpath, *file, sizeof(bibp.bootpath)); 111 BI_ADD(&bibp, BTINFO_BOOTPATH, sizeof(bibp)); 112 #endif 113 114 return (biosdiskopen(f, biosdev, partition)); 115 } 116