usr/src/cmd/fs.d/pcfs/mkfs/mkfs_pcfs.h

   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 */