sys/boot/efi/include/efifs.h

   1 /*
   2  * $FreeBSD: src/sys/boot/efi/include/efifs.h,v 1.2 2002/05/19 03:17:20 marcel Exp $
   3  * $DragonFly: src/sys/boot/efi/include/efifs.h,v 1.1 2003/11/10 06:08:32 dillon Exp $
   4  */
   5 #ifndef _EFI_FS_H
   6 #define _EFI_FS_H
   7
   8 /*++
   9
  10 Copyright (c) 1998  Intel Corporation
  11
  12 Module Name:
  13
  14     efifs.h
  15
  16 Abstract:
  17
  18     EFI File System structures
  19
  20
  21
  22 Revision History
  23
  24 --*/
  25
  26
  27 /*
  28  * EFI Partition header (normaly starts in LBA 1)
  29  */
  30
  31 #define EFI_PARTITION_SIGNATURE         0x5053595320494249
  32 #define EFI_PARTITION_REVISION          0x00010001
  33 #define MIN_EFI_PARTITION_BLOCK_SIZE    512
  34 #define EFI_PARTITION_LBA               1
  35
  36 typedef struct _EFI_PARTITION_HEADER {
  37     EFI_TABLE_HEADER    Hdr;
  38     UINT32              DirectoryAllocationNumber;
  39     UINT32              BlockSize;
  40     EFI_LBA             FirstUsableLba;
  41     EFI_LBA             LastUsableLba;
  42     EFI_LBA             UnusableSpace;
  43     EFI_LBA             FreeSpace;
  44     EFI_LBA             RootFile;
  45     EFI_LBA             SecutiryFile;
  46 } EFI_PARTITION_HEADER;
  47
  48
  49 /*
  50  * File header
  51  */
  52
  53 #define EFI_FILE_HEADER_SIGNATURE   0x454c494620494249
  54 #define EFI_FILE_HEADER_REVISION    0x00010000
  55 #define EFI_FILE_STRING_SIZE        260
  56
  57 typedef struct _EFI_FILE_HEADER {
  58     EFI_TABLE_HEADER    Hdr;
  59     UINT32              Class;
  60     UINT32              LBALOffset;
  61     EFI_LBA             Parent;
  62     UINT64              FileSize;
  63     UINT64              FileAttributes;
  64     EFI_TIME            FileCreateTime;
  65     EFI_TIME            FileModificationTime;
  66     EFI_GUID            VendorGuid;
  67     CHAR16              FileString[EFI_FILE_STRING_SIZE];
  68 } EFI_FILE_HEADER;
  69
  70
  71 /*
  72  * Return the file's first LBAL which is in the same
  73  * logical block as the file header
  74  */
  75
  76 #define EFI_FILE_LBAL(a)    ((EFI_LBAL *) (((CHAR8 *) (a)) + (a)->LBALOffset))
  77
  78 #define EFI_FILE_CLASS_FREE_SPACE   1
  79 #define EFI_FILE_CLASS_EMPTY        2
  80 #define EFI_FILE_CLASS_NORMAL       3
  81
  82
  83 /*
  84  * Logical Block Address List - the fundemental block
  85  * description structure
  86  */
  87
  88 #define EFI_LBAL_SIGNATURE      0x4c41424c20494249
  89 #define EFI_LBAL_REVISION       0x00010000
  90
  91 typedef struct _EFI_LBAL {
  92     EFI_TABLE_HEADER    Hdr;
  93     UINT32              Class;
  94     EFI_LBA             Parent;
  95     EFI_LBA             Next;
  96     UINT32              ArraySize;
  97     UINT32              ArrayCount;
  98 } EFI_LBAL;
  99
 100 /* Array size */
 101 #define EFI_LBAL_ARRAY_SIZE(lbal,offs,blks)  \
 102         (((blks) - (offs) - (lbal)->Hdr.HeaderSize) / sizeof(EFI_RL))
 103
 104 /*
 105  * Logical Block run-length
 106  */
 107
 108 typedef struct {
 109     EFI_LBA     Start;
 110     UINT64      Length;
 111 } EFI_RL;
 112
 113 /*
 114  * Return the run-length structure from an LBAL header
 115  */
 116
 117 #define EFI_LBAL_RL(a)      ((EFI_RL*) (((CHAR8 *) (a)) + (a)->Hdr.HeaderSize))
 118
 119 #endif