gnu-efi/inc/efipart.h

   1 #ifndef _EFI_PART_H
   2 #define _EFI_PART_H
   3
   4 /*++
   5
   6 Copyright (c) 1998  Intel Corporation
   7
   8 Module Name:
   9
  10     efipart.h
  11
  12 Abstract:
  13     Info about disk partitions and Master Boot Records
  14
  15
  16
  17
  18 Revision History
  19
  20 --*/
  21
  22 //
  23 //
  24 //
  25
  26 #define EFI_PARTITION   0xef
  27 #define MBR_SIZE        512
  28
  29 #pragma pack(1)
  30
  31 typedef struct {
  32     UINT8       BootIndicator;
  33     UINT8       StartHead;
  34     UINT8       StartSector;
  35     UINT8       StartTrack;
  36     UINT8       OSIndicator;
  37     UINT8       EndHead;
  38     UINT8       EndSector;
  39     UINT8       EndTrack;
  40     UINT8       StartingLBA[4];
  41     UINT8       SizeInLBA[4];
  42 } MBR_PARTITION_RECORD;
  43
  44 #define EXTRACT_UINT32(D) (UINT32)(D[0] | (D[1] << 8) | (D[2] << 16) | (D[3] << 24))
  45
  46 #define MBR_SIGNATURE           0xaa55
  47 #define MIN_MBR_DEVICE_SIZE     0x80000
  48 #define MBR_ERRATA_PAD          0x40000 // 128 MB
  49
  50 #define MAX_MBR_PARTITIONS  4
  51 typedef struct {
  52     UINT8                   BootStrapCode[440];
  53     UINT8                   UniqueMbrSignature[4];
  54     UINT8                   Unknown[2];
  55     MBR_PARTITION_RECORD    Partition[MAX_MBR_PARTITIONS];
  56     UINT16                  Signature;
  57 } MASTER_BOOT_RECORD;
  58 #pragma pack()
  59
  60
  61 #endif