usr/src/boot/sys/boot/efi/include/efifs.h

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