arch/all-pc/boot/grub2-aros/include/grub/msdos_partition.h

   1 /*
   2  *  GRUB  --  GRand Unified Bootloader
   3  *  Copyright (C) 1999,2000,2001,2002,2004,2007  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_PC_PARTITION_HEADER
  20 #define GRUB_PC_PARTITION_HEADER        1
  21
  22 #include <grub/symbol.h>
  23 #include <grub/types.h>
  24 #include <grub/err.h>
  25 #include <grub/disk.h>
  26 #include <grub/partition.h>
  27
  28 /* The signature.  */
  29 #define GRUB_PC_PARTITION_SIGNATURE             0xaa55
  30
  31 /* This is not a flag actually, but used as if it were a flag.  */
  32 #define GRUB_PC_PARTITION_TYPE_HIDDEN_FLAG      0x10
  33
  34 /* DOS partition types.  */
  35 #define GRUB_PC_PARTITION_TYPE_NONE             0
  36 #define GRUB_PC_PARTITION_TYPE_FAT12            1
  37 #define GRUB_PC_PARTITION_TYPE_FAT16_LT32M      4
  38 #define GRUB_PC_PARTITION_TYPE_EXTENDED         5
  39 #define GRUB_PC_PARTITION_TYPE_FAT16_GT32M      6
  40 #define GRUB_PC_PARTITION_TYPE_NTFS             7
  41 #define GRUB_PC_PARTITION_TYPE_FAT32            0xb
  42 #define GRUB_PC_PARTITION_TYPE_FAT32_LBA        0xc
  43 #define GRUB_PC_PARTITION_TYPE_FAT16_LBA        0xe
  44 #define GRUB_PC_PARTITION_TYPE_WIN95_EXTENDED   0xf
  45 #define GRUB_PC_PARTITION_TYPE_PLAN9            0x39
  46 #define GRUB_PC_PARTITION_TYPE_EZD              0x55
  47 #define GRUB_PC_PARTITION_TYPE_MINIX            0x80
  48 #define GRUB_PC_PARTITION_TYPE_LINUX_MINIX      0x81
  49 #define GRUB_PC_PARTITION_TYPE_LINUX_SWAP       0x82
  50 #define GRUB_PC_PARTITION_TYPE_EXT2FS           0x83
  51 #define GRUB_PC_PARTITION_TYPE_LINUX_EXTENDED   0x85
  52 #define GRUB_PC_PARTITION_TYPE_VSTAFS           0x9e
  53 #define GRUB_PC_PARTITION_TYPE_FREEBSD          0xa5
  54 #define GRUB_PC_PARTITION_TYPE_OPENBSD          0xa6
  55 #define GRUB_PC_PARTITION_TYPE_NETBSD           0xa9
  56 #define GRUB_PC_PARTITION_TYPE_HFS              0xaf
  57 #define GRUB_PC_PARTITION_TYPE_GPT_DISK         0xee
  58 #define GRUB_PC_PARTITION_TYPE_LINUX_RAID       0xfd
  59
  60 /* The partition entry.  */
  61 struct grub_msdos_partition_entry
  62 {
  63   /* If active, 0x80, otherwise, 0x00.  */
  64   grub_uint8_t flag;
  65
  66   /* The head of the start.  */
  67   grub_uint8_t start_head;
  68
  69   /* (S | ((C >> 2) & 0xC0)) where S is the sector of the start and C
  70      is the cylinder of the start. Note that S is counted from one.  */
  71   grub_uint8_t start_sector;
  72
  73   /* (C & 0xFF) where C is the cylinder of the start.  */
  74   grub_uint8_t start_cylinder;
  75
  76   /* The partition type.  */
  77   grub_uint8_t type;
  78
  79   /* The end versions of start_head, start_sector and start_cylinder,
  80      respectively.  */
  81   grub_uint8_t end_head;
  82   grub_uint8_t end_sector;
  83   grub_uint8_t end_cylinder;
  84
  85   /* The start sector. Note that this is counted from zero.  */
  86   grub_uint32_t start;
  87
  88   /* The length in sector units.  */
  89   grub_uint32_t length;
  90 } __attribute__ ((packed));
  91
  92 /* The structure of MBR.  */
  93 struct grub_msdos_partition_mbr
  94 {
  95   /* The code area (actually, including BPB).  */
  96   grub_uint8_t code[446];
  97
  98   /* Four partition entries.  */
  99   struct grub_msdos_partition_entry entries[4];
 100
 101   /* The signature 0xaa55.  */
 102   grub_uint16_t signature;
 103 } __attribute__ ((packed));
 104
 105 \f
 106
 107 static inline int
 108 grub_msdos_partition_is_empty (int type)
 109 {
 110   return (type == GRUB_PC_PARTITION_TYPE_NONE);
 111 }
 112
 113 static inline int
 114 grub_msdos_partition_is_extended (int type)
 115 {
 116   return (type == GRUB_PC_PARTITION_TYPE_EXTENDED
 117           || type == GRUB_PC_PARTITION_TYPE_WIN95_EXTENDED
 118           || type == GRUB_PC_PARTITION_TYPE_LINUX_EXTENDED);
 119 }
 120
 121 grub_err_t
 122 grub_partition_msdos_iterate (grub_disk_t disk,
 123                               int (*hook) (grub_disk_t disk,
 124                                            const grub_partition_t partition));
 125
 126 #endif /* ! GRUB_PC_PARTITION_HEADER */