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
62