EdkCompatibilityPkg/Sample/Tools/Source/GenBootsector/fat.h

   1 /*++
   2
   3 Copyright 2006, Intel Corporation
   4 All rights reserved. This program and the accompanying materials
   5 are licensed and made available under the terms and conditions of the BSD License
   6 which accompanies this distribution.  The full text of the license may be found at
   7 http://opensource.org/licenses/bsd-license.php
   8
   9 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  10 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  11
  12 Module Name:
  13
  14     fat.h
  15
  16 Abstract:
  17
  18 Revision History
  19
  20 --*/
  21
  22 #ifndef _FAT_BPB_H_
  23 #define _FAT_BPB_H_
  24
  25 #include "Tiano.h"
  26
  27 #pragma pack(1)
  28
  29 typedef struct {
  30   //
  31   // Fat common field
  32   //
  33   UINT8              BS_jmpBoot[3];
  34   CHAR8              BS_OEMName[8];
  35   UINT16             BPB_BytsPerSec;
  36   UINT8              BPB_SecPerClus;
  37   UINT16             BPB_RsvdSecCnt;
  38   UINT8              BPB_NumFATs;
  39   UINT16             BPB_RootEntCnt;
  40   UINT16             BPB_TotSec16;
  41   UINT8              BPB_Media;
  42   UINT16             BPB_FATSz16;
  43   UINT16             BPB_SecPerTrk;
  44   UINT16             BPB_NumHeads;
  45   UINT32             BPB_HiddSec;
  46   UINT32             BPB_TotSec32;
  47
  48   //
  49   // Fat12/16 specific field
  50   //
  51   UINT8              BS_DrvNum;
  52   UINT8              BS_Reserved1;
  53   UINT8              BS_BootSig;
  54   UINT32             BS_VolID;
  55   CHAR8              BS_VolLab[11];
  56   CHAR8              BS_FilSysType[8];
  57
  58   //
  59   // Boot Code and Data
  60   //
  61   UINT8              Reserved[448];
  62
  63   //
  64   // Fat common signature - 0xAA55
  65   //
  66   UINT16             Signature;
  67 } FAT12_16_BPB_STRUCT;
  68
  69 typedef struct {
  70   //
  71   // Fat common field
  72   //
  73   UINT8              BS_jmpBoot[3];
  74   CHAR8              BS_OEMName[8];
  75   UINT16             BPB_BytsPerSec;
  76   UINT8              BPB_SecPerClus;
  77   UINT16             BPB_RsvdSecCnt;
  78   UINT8              BPB_NumFATs;
  79   UINT16             BPB_RootEntCnt;
  80   UINT16             BPB_TotSec16;
  81   UINT8              BPB_Media;
  82   UINT16             BPB_FATSz16;
  83   UINT16             BPB_SecPerTrk;
  84   UINT16             BPB_NumHeads;
  85   UINT32             BPB_HiddSec;
  86   UINT32             BPB_TotSec32;
  87
  88   //
  89   // Fat32 specific field
  90   //
  91   UINT32             BPB_FATSz32;
  92   UINT16             BPB_ExtFlags;
  93   UINT16             BPB_FSVer;
  94   UINT32             BPB_RootClus;
  95   UINT16             BPB_FSInfo;
  96   UINT16             BPB_BkBootSec;
  97   UINT8              BPB_Reserved[12];
  98   UINT8              BS_DrvNum;
  99   UINT8              BS_Reserved1;
 100   UINT8              BS_BootSig;
 101   UINT32             BS_VolID;
 102   CHAR8              BS_VolLab[11];
 103   CHAR8              BS_FilSysType[8];
 104
 105   //
 106   // Boot Code and Data
 107   //
 108   UINT8              Reserved[420];
 109
 110   //
 111   // Fat common signature - 0xAA55
 112   //
 113   UINT16             Signature;
 114 } FAT32_BPB_STRUCT;
 115
 116 typedef union {
 117   FAT12_16_BPB_STRUCT   Fat12_16;
 118   FAT32_BPB_STRUCT      Fat32;
 119 } FAT_BPB_STRUCT;
 120
 121 typedef enum {
 122   FatTypeUnknown,
 123   FatTypeFat12,
 124   FatTypeFat16,
 125   FatTypeFat32,
 126   FatTypeMax
 127 } FAT_TYPE;
 128
 129 typedef struct {
 130   CHAR8              DIR_Name[11];
 131   UINT8              DIR_Attr;
 132   UINT8              DIR_NTRes;
 133   UINT8              DIR_CrtTimeTenth;
 134   UINT16             DIR_CrtTime;
 135   UINT16             DIR_CrtDate;
 136   UINT16             DIR_LstAccDate;
 137   UINT16             DIR_FstClusHI;
 138   UINT16             DIR_WrtTime;
 139   UINT16             DIR_WrtDate;
 140   UINT16             DIR_FstClusLO;
 141   UINT32             DIR_FileSize;
 142 } FAT_DIRECTORY_ENTRY;
 143
 144 #pragma pack()
 145
 146 #define FAT_MAX_FAT12_CLUSTER         0xFF5
 147 #define FAT_MAX_FAT16_CLUSTER         0xFFF5
 148
 149 #define FAT_BS_SIGNATURE      0xAA55
 150 #define FAT_BS_BOOTSIG        0x29
 151 #define FAT_BS_JMP1           0xEB
 152 #define FAT_BS_JMP2           0xE9
 153 #define FAT_FILSYSTYPE        "FAT     "
 154 #define FAT12_FILSYSTYPE      "FAT12   "
 155 #define FAT16_FILSYSTYPE      "FAT16   "
 156 #define FAT32_FILSYSTYPE      "FAT32   "
 157
 158 #endif