1 /* $NetBSD: devopen.c,v 1.1 2017/01/24 11:09:14 nonaka 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 #include "efiboot.h" 58 59 #include <biosdisk.h> 60 #include "devopen.h" 61 #include <bootinfo.h> 62 63 static int 64 dev2bios(char *devname, int unit, int *biosdev) 65 { 66 67 if (strcmp(devname, "hd") == 0) 68 *biosdev = 0x80 + unit; 69 else 70 return ENXIO; 71 return 0; 72 } 73 74 void 75 bios2dev(int biosdev, daddr_t sector, char **devname, int *unit, int *partition) 76 { 77 78 *unit = biosdev & 0x7f; 79 *devname = "hd"; 80 *partition = biosdisk_findpartition(biosdev, sector); 81 } 82 83 struct btinfo_bootpath bibp; 84 extern bool kernel_loaded; 85 86 /* 87 * Open the EFI disk device 88 */ 89 int 90 devopen(struct open_file *f, const char *fname, char **file) 91 { 92 char *fsname, *devname; 93 int unit, partition; 94 int biosdev; 95 int error; 96 97 if ((error = parsebootfile(fname, &fsname, &devname, 98 &unit, &partition, (const char **) file)) 99 || (error = dev2bios(devname, unit, &biosdev))) 100 return error; 101 102 f->f_dev = &devsw[0]; /* must be biosdisk */ 103 104 if (!kernel_loaded) { 105 strncpy(bibp.bootpath, *file, sizeof(bibp.bootpath)); 106 BI_ADD(&bibp, BTINFO_BOOTPATH, sizeof(bibp)); 107 } 108 109 return biosdisk_open(f, biosdev, partition); 110 } 111