EdkModulePkg/Universal/Disk/Partition/Dxe/Mbr.h

   1 /*++
   2
   3 Copyright (c) 2006, Intel Corporation
   4 All rights reserved. This program and the accompanying materials
   5 are licensed and made available under the terms and conditions of the BSD License
   6 which accompanies this distribution.  The full text of the license may be found at
   7 http://opensource.org/licenses/bsd-license.php
   8
   9 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  10 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  11
  12 Module Name:
  13
  14   Mbr.h
  15
  16 Abstract:
  17
  18   Data Structures required for detecting MBR Partitions
  19
  20 Revision History
  21
  22 --*/
  23
  24 #ifndef _MBR_H_
  25 #define _MBR_H_
  26
  27 #pragma pack(1)
  28
  29 #define MBR_SIGNATURE               0xaa55
  30 #define MIN_MBR_DEVICE_SIZE         0x80000
  31 #define MBR_ERRATA_PAD              0x40000 // 128 MB
  32 #define EXTENDED_DOS_PARTITION      0x05
  33 #define EXTENDED_WINDOWS_PARTITION  0x0F
  34 #define MAX_MBR_PARTITIONS          4
  35
  36 #define PMBR_GPT_PARTITION          0xEE
  37 #define EFI_PARTITION               0xEF
  38 #define MBR_SIZE                    512
  39
  40 //
  41 // MBR Partition Entry
  42 //
  43 typedef struct {
  44   UINT8 BootIndicator;
  45   UINT8 StartHead;
  46   UINT8 StartSector;
  47   UINT8 StartTrack;
  48   UINT8 OSIndicator;
  49   UINT8 EndHead;
  50   UINT8 EndSector;
  51   UINT8 EndTrack;
  52   UINT8 StartingLBA[4];
  53   UINT8 SizeInLBA[4];
  54 } MBR_PARTITION_RECORD;
  55
  56 //
  57 // MBR Partition table
  58 //
  59 typedef struct {
  60   UINT8                 BootStrapCode[440];
  61   UINT8                 UniqueMbrSignature[4];
  62   UINT8                 Unknown[2];
  63   MBR_PARTITION_RECORD  Partition[MAX_MBR_PARTITIONS];
  64   UINT16                Signature;
  65 } MASTER_BOOT_RECORD;
  66
  67 #pragma pack()
  68
  69 #endif