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