1#ifndef _EFI_FS_H
2#define _EFI_FS_H
3
4/*++
5
6Copyright (c)  1999 - 2002 Intel Corporation. All rights reserved
7This software and associated documentation (if any) is furnished
8under a license and may only be used or copied in accordance
9with the terms of the license. Except as permitted by such
10license, no part of this software or documentation may be
11reproduced, stored in a retrieval system, or transmitted in any
12form or by any means without the express written consent of
13Intel Corporation.
14
15Module Name:
16
17    efifs.h
18
19Abstract:
20
21    EFI File System structures
22
23
24
25Revision History
26
27--*/
28
29
30//
31// EFI Partition header (normally starts in LBA 1)
32//
33
34#define EFI_PARTITION_SIGNATURE         0x5053595320494249
35#define EFI_PARTITION_REVISION          0x00010001
36#define MIN_EFI_PARTITION_BLOCK_SIZE    512
37#define EFI_PARTITION_LBA               1
38
39typedef struct _EFI_PARTITION_HEADER {
40    EFI_TABLE_HEADER    Hdr;
41    UINT32              DirectoryAllocationNumber;
42    UINT32              BlockSize;
43    EFI_LBA             FirstUsableLba;
44    EFI_LBA             LastUsableLba;
45    EFI_LBA             UnusableSpace;
46    EFI_LBA             FreeSpace;
47    EFI_LBA             RootFile;
48    EFI_LBA             SecutiryFile;
49} EFI_PARTITION_HEADER;
50
51
52//
53// File header
54//
55
56#define EFI_FILE_HEADER_SIGNATURE   0x454c494620494249
57#define EFI_FILE_HEADER_REVISION    0x00010000
58#define EFI_FILE_STRING_SIZE        260
59
60typedef struct _EFI_FILE_HEADER {
61    EFI_TABLE_HEADER    Hdr;
62    UINT32              Class;
63    UINT32              LBALOffset;
64    EFI_LBA             Parent;
65    UINT64              FileSize;
66    UINT64              FileAttributes;
67    EFI_TIME            FileCreateTime;
68    EFI_TIME            FileModificationTime;
69    EFI_GUID            VendorGuid;
70    CHAR16              FileString[EFI_FILE_STRING_SIZE];
71} EFI_FILE_HEADER;
72
73
74//
75// Return the file's first LBAL which is in the same
76// logical block as the file header
77//
78
79#define EFI_FILE_LBAL(a)    ((EFI_LBAL *) (((CHAR8 *) (a)) + (a)->LBALOffset))
80
81#define EFI_FILE_CLASS_FREE_SPACE   1
82#define EFI_FILE_CLASS_EMPTY        2
83#define EFI_FILE_CLASS_NORMAL       3
84
85
86//
87// Logical Block Address List - the fundemental block
88// description structure
89//
90
91#define EFI_LBAL_SIGNATURE      0x4c41424c20494249
92#define EFI_LBAL_REVISION       0x00010000
93
94typedef struct _EFI_LBAL {
95    EFI_TABLE_HEADER    Hdr;
96    UINT32              Class;
97    EFI_LBA             Parent;
98    EFI_LBA             Next;
99    UINT32              ArraySize;
100    UINT32              ArrayCount;
101} EFI_LBAL;
102
103// Array size
104#define EFI_LBAL_ARRAY_SIZE(lbal,offs,blks)  \
105        (((blks) - (offs) - (lbal)->Hdr.HeaderSize) / sizeof(EFI_RL))
106
107//
108// Logical Block run-length
109//
110
111typedef struct {
112    EFI_LBA     Start;
113    UINT64      Length;
114} EFI_RL;
115
116//
117// Return the run-length structure from an LBAL header
118//
119
120#define EFI_LBAL_RL(a)      ((EFI_RL*) (((CHAR8 *) (a)) + (a)->Hdr.HeaderSize))
121
122#endif
123