MdePkg/Include/IndustryStandard/Mbr.h

   1 /** @file
   2   Legacy Master Boot Record Format Definition.
   3
   4 Copyright (c) 2006, Intel Corporation
   5 All rights reserved. This program and the accompanying materials
   6 are licensed and made available under the terms and conditions of the BSD License
   7 which accompanies this distribution.  The full text of the license may be found at
   8 http://opensource.org/licenses/bsd-license.php
   9
  10 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  11 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  12
  13 --*/
  14
  15 #ifndef _MBR_H_
  16 #define _MBR_H_
  17
  18 #define MBR_SIGNATURE               0xaa55
  19 #define MIN_MBR_DEVICE_SIZE         0x80000
  20 #define MBR_ERRATA_PAD              0x40000 // 128 MB
  21
  22 #define EXTENDED_DOS_PARTITION      0x05
  23 #define EXTENDED_WINDOWS_PARTITION  0x0F
  24
  25 #define MAX_MBR_PARTITIONS          4
  26
  27 #define PMBR_GPT_PARTITION          0xEE
  28 #define EFI_PARTITION               0xEF
  29
  30 #define MBR_SIZE                    512
  31
  32 #pragma pack(1)
  33 //
  34 // MBR Partition Entry
  35 //
  36 typedef struct {
  37   UINT8 BootIndicator;
  38   UINT8 StartHead;
  39   UINT8 StartSector;
  40   UINT8 StartTrack;
  41   UINT8 OSIndicator;
  42   UINT8 EndHead;
  43   UINT8 EndSector;
  44   UINT8 EndTrack;
  45   UINT8 StartingLBA[4];
  46   UINT8 SizeInLBA[4];
  47 } MBR_PARTITION_RECORD;
  48
  49 //
  50 // MBR Partition table
  51 //
  52 typedef struct {
  53   UINT8                 BootStrapCode[440];
  54   UINT8                 UniqueMbrSignature[4];
  55   UINT8                 Unknown[2];
  56   MBR_PARTITION_RECORD  Partition[MAX_MBR_PARTITIONS];
  57   UINT16                Signature;
  58 } MASTER_BOOT_RECORD;
  59
  60 #pragma pack()
  61
  62 #endif