include/grub/fat.h

   1 /*
   2  *  GRUB  --  GRand Unified Bootloader
   3  *  Copyright (C) 2000,2001,2002,2003,2004,2005,2007,2008,2009  Free Software Foundation, Inc.
   4  *
   5  *  GRUB is free software: you can redistribute it and/or modify
   6  *  it under the terms of the GNU General Public License as published by
   7  *  the Free Software Foundation, either version 3 of the License, or
   8  *  (at your option) any later version.
   9  *
  10  *  GRUB is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License
  16  *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
  17  */
  18
  19 #ifndef GRUB_FAT_H
  20 #define GRUB_FAT_H      1
  21
  22 #include <grub/types.h>
  23
  24 struct grub_fat_bpb
  25 {
  26   grub_uint8_t jmp_boot[3];
  27   grub_uint8_t oem_name[8];
  28   grub_uint16_t bytes_per_sector;
  29   grub_uint8_t sectors_per_cluster;
  30   grub_uint16_t num_reserved_sectors;
  31   grub_uint8_t num_fats;                /* 0x10 */
  32   grub_uint16_t num_root_entries;
  33   grub_uint16_t num_total_sectors_16;
  34   grub_uint8_t media;                   /* 0x15 */
  35   grub_uint16_t sectors_per_fat_16;
  36   grub_uint16_t sectors_per_track;      /* 0x18 */
  37   grub_uint16_t num_heads;              /* 0x1A */
  38   grub_uint32_t num_hidden_sectors;     /* 0x1C */
  39   grub_uint32_t num_total_sectors_32;   /* 0x20 */
  40   union
  41   {
  42     struct
  43     {
  44       grub_uint8_t num_ph_drive;
  45       grub_uint8_t reserved;
  46       grub_uint8_t boot_sig;
  47       grub_uint32_t num_serial;
  48       grub_uint8_t label[11];
  49       grub_uint8_t fstype[8];
  50     } GRUB_PACKED fat12_or_fat16;
  51     struct
  52     {
  53       grub_uint32_t sectors_per_fat_32;
  54       grub_uint16_t extended_flags;
  55       grub_uint16_t fs_version;
  56       grub_uint32_t root_cluster;
  57       grub_uint16_t fs_info;
  58       grub_uint16_t backup_boot_sector;
  59       grub_uint8_t reserved[12];
  60       grub_uint8_t num_ph_drive;
  61       grub_uint8_t reserved1;
  62       grub_uint8_t boot_sig;
  63       grub_uint32_t num_serial;
  64       grub_uint8_t label[11];
  65       grub_uint8_t fstype[8];
  66     } GRUB_PACKED fat32;
  67   } GRUB_PACKED version_specific;
  68 } GRUB_PACKED;
  69
  70 #ifdef GRUB_UTIL
  71 #include <grub/disk.h>
  72
  73 grub_disk_addr_t
  74 grub_fat_get_cluster_sector (grub_disk_t disk, grub_uint64_t *sec_per_lcn);
  75 #endif
  76
  77 #endif