1/* $NetBSD$ */ 2 3/*- 4 * Copyright (c) 1993 John Brezak 5 * 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. The name of the author may not be used to endorse or promote products 16 * derived from this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR `AS IS'' AND ANY EXPRESS OR 19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 20 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 21 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, 22 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 23 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 26 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN 27 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28 * POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31#include <lib/libsa/stand.h> 32#include <lib/libkern/libkern.h> 33 34#include "biosdisk.h" 35 36#include "boot.h" 37#include "bootinfo.h" 38 39static int dev2bios(char *devname, unsigned int unit, int *biosdev); 40static int devlookup(char *d); 41 42static int 43dev2bios(char *devname, unsigned int unit, int *biosdev) 44{ 45 46 if (strcmp(devname, "hd") == 0) { 47 if (unit == 0 || unit == 1) { 48 *biosdev = 0x40 + (unit << 4); 49 return (0); 50 } 51 } 52 return (ENXIO); 53} 54 55int 56bios2dev(int biosdev, char **devname, u_int *unit, u_int sector, u_int *ptnp) 57{ 58 59 *devname = "hd"; 60 *unit = (biosdev >> 4) & 1; 61 *ptnp = biosdisk_findptn(biosdev, sector); 62 return (0); 63} 64 65static int 66devlookup(char *d) 67{ 68 struct devsw *dp = devsw; 69 int i; 70 71 for (i = 0; i < ndevs; i++, dp++) { 72 if ((dp->dv_name != NULL) && (strcmp(dp->dv_name, d) == 0)) { 73 return (i); 74 } 75 } 76 77 printf("No such device - Configured devices are:\n"); 78 for (dp = devsw, i = 0; i < ndevs; i++, dp++) { 79 if (dp->dv_name != NULL) { 80 printf(" %s", dp->dv_name); 81 } 82 } 83 printf("\n"); 84 return (-1); 85} 86 87int 88devopen(struct open_file *f, const char *fname, char **file) 89{ 90 static struct btinfo_bootpath bibp; 91 struct devsw *dp; 92 char *devname; 93 unsigned int dev, ctlr, unit, partition; 94 int biosdev; 95 int error; 96 97#if defined(DEBUG) 98 printf("devopen: fname = %s\n", fname); 99#endif 100 101 ctlr = 0; 102 if ((error = parsebootfile(fname, &devname, &unit, &partition, 103 (const char **)file)) != 0) { 104 return (error); 105 } 106 107#if defined(DEBUG) 108 printf("devopen: devname = %s\n", devname); 109#endif 110 dev = devlookup(devname); 111 if (dev == -1) { 112#if defined(DEBUG) 113 printf("devopen: devlookup failed\n"); 114#endif 115 return (ENXIO); 116 } 117 118 dp = &devsw[dev]; 119 if (dp->dv_open == NULL) { 120#if defined(DEBUG) 121 printf("devopen: dev->dv_open() == NULL\n"); 122#endif 123 return (ENODEV); 124 } 125 f->f_dev = dp; 126 127 strncpy(bibp.bootpath, *file, sizeof(bibp.bootpath)); 128 BI_ADD(&bibp, BTINFO_BOOTPATH, sizeof(bibp)); 129 130 if (dev2bios(devname, unit, &biosdev) == 0) { 131#if defined(DEBUG) 132 printf("devopen: bios disk\n"); 133#endif 134 return (biosdisk_open(f, biosdev, partition)); 135 } 136 137#if defined(DEBUG) 138 printf("devopen: dev->dv_open()\n"); 139#endif 140 if ((error = (*dp->dv_open)(f, ctlr, unit, partition)) == 0) { 141#if defined(DEBUG) 142 printf("devopen: dev->dv_open() opened\n"); 143#endif 144 return (0); 145 } 146 147 printf("%s%d%c:%s : %s\n", dp->dv_name, unit, partition + 'a', *file, 148 strerror(error)); 149 return (error); 150} 151