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https://github.com/acidanthera/audk.git
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40d841f6a8
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@10502 6f19259b-4bc3-4df7-8a09-765794883524
153 lines
4.1 KiB
C
153 lines
4.1 KiB
C
/** @file
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Fat file system structure and definition.
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Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>
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This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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--*/
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#ifndef _FAT_BPB_H_
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#define _FAT_BPB_H_
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#include "CommonLib.h"
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#pragma pack(1)
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typedef struct {
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//
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// Fat common field
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//
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UINT8 BS_jmpBoot[3];
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CHAR8 BS_OEMName[8];
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UINT16 BPB_BytsPerSec;
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UINT8 BPB_SecPerClus;
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UINT16 BPB_RsvdSecCnt;
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UINT8 BPB_NumFATs;
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UINT16 BPB_RootEntCnt;
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UINT16 BPB_TotSec16;
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UINT8 BPB_Media;
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UINT16 BPB_FATSz16;
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UINT16 BPB_SecPerTrk;
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UINT16 BPB_NumHeads;
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UINT32 BPB_HiddSec;
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UINT32 BPB_TotSec32;
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//
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// Fat12/16 specific field
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//
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UINT8 BS_DrvNum;
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UINT8 BS_Reserved1;
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UINT8 BS_BootSig;
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UINT32 BS_VolID;
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CHAR8 BS_VolLab[11];
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CHAR8 BS_FilSysType[8];
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//
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// Boot Code and Data
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//
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UINT8 Reserved[448];
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//
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// Fat common signature - 0xAA55
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//
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UINT16 Signature;
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} FAT12_16_BPB_STRUCT;
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typedef struct {
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//
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// Fat common field
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//
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UINT8 BS_jmpBoot[3];
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CHAR8 BS_OEMName[8];
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UINT16 BPB_BytsPerSec;
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UINT8 BPB_SecPerClus;
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UINT16 BPB_RsvdSecCnt;
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UINT8 BPB_NumFATs;
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UINT16 BPB_RootEntCnt;
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UINT16 BPB_TotSec16;
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UINT8 BPB_Media;
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UINT16 BPB_FATSz16;
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UINT16 BPB_SecPerTrk;
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UINT16 BPB_NumHeads;
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UINT32 BPB_HiddSec;
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UINT32 BPB_TotSec32;
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//
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// Fat32 specific field
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//
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UINT32 BPB_FATSz32;
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UINT16 BPB_ExtFlags;
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UINT16 BPB_FSVer;
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UINT32 BPB_RootClus;
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UINT16 BPB_FSInfo;
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UINT16 BPB_BkBootSec;
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UINT8 BPB_Reserved[12];
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UINT8 BS_DrvNum;
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UINT8 BS_Reserved1;
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UINT8 BS_BootSig;
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UINT32 BS_VolID;
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CHAR8 BS_VolLab[11];
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CHAR8 BS_FilSysType[8];
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//
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// Boot Code and Data
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//
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UINT8 Reserved[420];
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//
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// Fat common signature - 0xAA55
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//
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UINT16 Signature;
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} FAT32_BPB_STRUCT;
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typedef union {
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FAT12_16_BPB_STRUCT Fat12_16;
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FAT32_BPB_STRUCT Fat32;
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} FAT_BPB_STRUCT;
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typedef enum {
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FatTypeUnknown,
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FatTypeFat12,
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FatTypeFat16,
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FatTypeFat32,
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FatTypeMax
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} FAT_TYPE;
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typedef struct {
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CHAR8 DIR_Name[11];
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UINT8 DIR_Attr;
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UINT8 DIR_NTRes;
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UINT8 DIR_CrtTimeTenth;
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UINT16 DIR_CrtTime;
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UINT16 DIR_CrtDate;
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UINT16 DIR_LstAccDate;
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UINT16 DIR_FstClusHI;
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UINT16 DIR_WrtTime;
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UINT16 DIR_WrtDate;
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UINT16 DIR_FstClusLO;
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UINT32 DIR_FileSize;
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} FAT_DIRECTORY_ENTRY;
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#pragma pack()
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#define FAT_MAX_FAT12_CLUSTER 0xFF5
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#define FAT_MAX_FAT16_CLUSTER 0xFFF5
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#define FAT_BS_SIGNATURE 0xAA55
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#define FAT_BS_BOOTSIG 0x29
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#define FAT_BS_JMP1 0xEB
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#define FAT_BS_JMP2 0xE9
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#define FAT_FILSYSTYPE "FAT "
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#define FAT12_FILSYSTYPE "FAT12 "
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#define FAT16_FILSYSTYPE "FAT16 "
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#define FAT32_FILSYSTYPE "FAT32 "
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#endif
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