MdePkg/Include/IndustryStandard/Mbr.h

   1 /** @file
   2   Legacy Master Boot Record Format Definition.
   3
   4 Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
   5 SPDX-License-Identifier: BSD-2-Clause-Patent
   6
   7 **/
   8
   9 #ifndef _MBR_H_
  10 #define _MBR_H_
  11
  12 #define MBR_SIGNATURE  0xaa55
  13
  14 #define EXTENDED_DOS_PARTITION      0x05
  15 #define EXTENDED_WINDOWS_PARTITION  0x0F
  16
  17 #define MAX_MBR_PARTITIONS  4
  18
  19 #define PMBR_GPT_PARTITION  0xEE
  20 #define EFI_PARTITION       0xEF
  21
  22 #define MBR_SIZE  512
  23
  24 #pragma pack(1)
  25 ///
  26 /// MBR Partition Entry
  27 ///
  28 typedef struct {
  29   UINT8    BootIndicator;
  30   UINT8    StartHead;
  31   UINT8    StartSector;
  32   UINT8    StartTrack;
  33   UINT8    OSIndicator;
  34   UINT8    EndHead;
  35   UINT8    EndSector;
  36   UINT8    EndTrack;
  37   UINT8    StartingLBA[4];
  38   UINT8    SizeInLBA[4];
  39 } MBR_PARTITION_RECORD;
  40
  41 ///
  42 /// MBR Partition Table
  43 ///
  44 typedef struct {
  45   UINT8                   BootStrapCode[440];
  46   UINT8                   UniqueMbrSignature[4];
  47   UINT8                   Unknown[2];
  48   MBR_PARTITION_RECORD    Partition[MAX_MBR_PARTITIONS];
  49   UINT16                  Signature;
  50 } MASTER_BOOT_RECORD;
  51
  52 #pragma pack()
  53
  54 #endif