1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright (c) 1996, 1998, 1999 by Sun Microsystems, Inc. 24 * All rights reserved. 25 */ 26 27 #ifndef _MKFS_PCFS_H 28 #define _MKFS_PCFS_H 29 30 #pragma ident "%Z%%M% %I% %E% SMI" 31 32 #ifdef __cplusplus 33 extern "C" { 34 #endif 35 36 #define BPSEC 512 /* Assumed # of bytes per sector */ 37 38 #define OPCODE1 0xE9 39 #define OPCODE2 0xEB 40 #define BOOTSECSIG 0xAA55 41 42 /* 43 * Offset (in bytes) from address of boot sector to where we put 44 * the backup copy of that sector. (FAT32 only) 45 */ 46 #define BKUP_BOOTSECT_OFFSET 0xC00 47 48 #define uppercase(c) ((c) >= 'a' && (c) <= 'z' ? (c) - 'a' + 'A' : (c)) 49 50 #define FAT12_TYPE_STRING "FAT12 " 51 #define FAT16_TYPE_STRING "FAT16 " 52 #define FAT32_TYPE_STRING "FAT32 " 53 54 #define FAT12_ENTSPERSECT 341 55 #define FAT16_ENTSPERSECT 256 56 #define FAT32_ENTSPERSECT 128 57 58 #ifndef SUNIXOSBOOT 59 #define SUNIXOSBOOT 190 /* Solaris UNIX boot partition */ 60 #endif 61 62 /* 63 * A macro implementing a ceiling function for integer divides. 64 */ 65 #define idivceil(dvend, dvsor) \ 66 ((dvend)/(dvsor) + (((dvend)%(dvsor) == 0) ? 0 : 1)) 67 68 /* 69 * Return values for the seek_XXX functions 70 */ 71 #define PART_NOT_FOUND 0 72 #define PART_FOUND 1 73 74 /* 75 * MS-DOS Disk layout: 76 * 77 * --------------------- 78 * | Boot sector | 79 * |-------------------| 80 * | Reserved area | 81 * |-------------------| 82 * | FAT #1 | 83 * |-------------------| 84 * | FAT #2 | 85 * |-------------------| 86 * | Root directory | 87 * |-------------------| 88 * | | 89 * | File area | 90 * |___________________| 91 */ 92 93 #ifdef i386 94 #pragma pack(1) 95 #endif 96 struct _orig_bios_param_blk { 97 uint16_t bytes_sector; 98 uchar_t sectors_per_cluster; 99 uint16_t resv_sectors; 100 uchar_t num_fats; 101 uint16_t num_root_entries; 102 uint16_t sectors_in_volume; 103 uchar_t media; 104 uint16_t sectors_per_fat; 105 uint16_t sectors_per_track; 106 uint16_t heads; 107 uint32_t hidden_sectors; 108 uint32_t sectors_in_logical_volume; 109 }; 110 #ifdef i386 111 #pragma pack() 112 #endif 113 114 #ifdef i386 115 #pragma pack(1) 116 #endif 117 struct _bpb32_extensions { 118 uint32_t big_sectors_per_fat; 119 uint16_t ext_flags; 120 uchar_t fs_vers_lo; 121 uchar_t fs_vers_hi; 122 uint32_t root_dir_clust; 123 uint16_t fsinfosec; 124 uint16_t backupboot; 125 uint16_t reserved[6]; 126 }; 127 #ifdef i386 128 #pragma pack() 129 #endif 130 131 #ifdef i386 132 #pragma pack(1) 133 #endif 134 struct _bpb_extensions { 135 uchar_t phys_drive_num; 136 uchar_t reserved; 137 uchar_t ext_signature; 138 uint32_t volume_id; 139 uchar_t volume_label[11]; 140 uchar_t type[8]; 141 }; 142 #ifdef i386 143 #pragma pack() 144 #endif 145 146 #ifdef i386 147 #pragma pack(1) 148 #endif 149 struct _sun_bpb_extensions { 150 uint16_t bs_offset_high; 151 uint16_t bs_offset_low; 152 }; 153 #ifdef i386 154 #pragma pack() 155 #endif 156 157 /* 158 * bpb_t is a conglomeration of all the fields a bpb can have. Every 159 * bpb will have the orig_bios struct, but only FAT32's will have bpb32, 160 * and only Solaris boot diskettes will have the sunbpb structure. 161 */ 162 typedef struct _bios_param_blk { 163 struct _orig_bios_param_blk bpb; 164 struct _bpb32_extensions bpb32; 165 struct _bpb_extensions ebpb; 166 struct _sun_bpb_extensions sunbpb; 167 } bpb_t; 168 169 #ifdef i386 170 #pragma pack(1) 171 struct _bpb_head { 172 uchar_t bs_jump_code[3]; 173 uchar_t bs_oem_name[8]; 174 struct _orig_bios_param_blk bs_bpb; 175 }; 176 #pragma pack() 177 178 #pragma pack(1) 179 struct _boot_sector { 180 struct _bpb_head bs_front; 181 struct _bpb_extensions bs_ebpb; 182 struct _sun_bpb_extensions bs_sebpb; 183 uchar_t bs_bootstrap[444]; 184 uchar_t bs_signature[2]; 185 }; 186 #pragma pack() 187 188 #pragma pack(1) 189 struct _boot_sector32 { 190 struct _bpb_head bs_front; 191 struct _bpb32_extensions bs_bpb32; 192 struct _bpb_extensions bs_ebpb; 193 uchar_t bs_bootstrap[420]; 194 uchar_t bs_signature[2]; 195 }; 196 #pragma pack() 197 #else 198 #define ORIG_BPB_START_INDEX 8 /* index into filler field */ 199 #define EXT_BPB_START_INDEX 33 /* index into filler field */ 200 #define BPB_32_START_INDEX 33 /* index into filler field */ 201 #define EXT_BPB_32_START_INDEX 61 /* index into filler field */ 202 struct _boot_sector { 203 uchar_t bs_jump_code[3]; 204 uchar_t bs_filler[59]; 205 uchar_t bs_sun_bpb[4]; 206 uchar_t bs_bootstrap[444]; 207 uchar_t bs_signature[2]; 208 }; 209 210 struct _boot_sector32 { 211 uchar_t bs_jump_code[3]; 212 uchar_t bs_filler[87]; 213 uchar_t bs_bootstrap[420]; 214 uchar_t bs_signature[2]; 215 }; 216 #endif 217 218 typedef union _ubso { 219 struct _boot_sector bs; 220 struct _boot_sector32 bs32; 221 struct mboot mb; 222 uchar_t buf[BPSEC]; 223 } boot_sector_t; 224 225 #ifdef __cplusplus 226 } 227 #endif 228 229 #endif /* _MKFS_PCFS_H */ 230