132 lines
3.7 KiB
C
132 lines
3.7 KiB
C
/*++
|
|
|
|
Copyright (c) 1998 Intel Corporation
|
|
|
|
Module Name:
|
|
|
|
fat.h
|
|
|
|
Abstract:
|
|
|
|
On disk fat structures
|
|
|
|
|
|
|
|
Revision History
|
|
|
|
--*/
|
|
|
|
typedef enum {
|
|
FAT12,
|
|
FAT16,
|
|
FAT32,
|
|
FatUndefined
|
|
} FAT_VOLUME_TYPE;
|
|
|
|
#pragma pack(1)
|
|
|
|
/*
|
|
* Used for fat12 & fat16
|
|
*/
|
|
|
|
typedef struct {
|
|
UINT8 Ia32Jump[3];
|
|
CHAR8 OemId[8];
|
|
|
|
UINT16 SectorSize;
|
|
UINT8 SectorsPerCluster;
|
|
UINT16 ReservedSectors;
|
|
UINT8 NoFats;
|
|
UINT16 RootEntries; /* < FAT32, root dir is fixed size */
|
|
UINT16 Sectors;
|
|
UINT8 Media; /* (ignored) */
|
|
UINT16 SectorsPerFat; /* < FAT32 */
|
|
UINT16 SectorsPerTrack; /* (ignored) */
|
|
UINT16 Heads; /* (ignored) */
|
|
UINT32 HiddenSectors; /* (ignored) */
|
|
UINT32 LargeSectors; /* => FAT32 */
|
|
|
|
UINT8 PhysicalDriveNumber; /* (ignored) */
|
|
UINT8 CurrentHead; /* holds boot_sector_dirty bit */
|
|
UINT8 Signature; /* (ignored) */
|
|
|
|
CHAR8 Id[4];
|
|
CHAR8 FatLabel[11];
|
|
CHAR8 SystemId[8];
|
|
|
|
} FAT_BOOT_SECTOR;
|
|
|
|
typedef struct {
|
|
UINT8 Ia32Jump[3];
|
|
CHAR8 OemId[8];
|
|
|
|
UINT16 SectorSize;
|
|
UINT8 SectorsPerCluster;
|
|
UINT16 ReservedSectors;
|
|
UINT8 NoFats;
|
|
UINT16 RootEntries; /* < FAT32, root dir is fixed size */
|
|
UINT16 Sectors;
|
|
UINT8 Media; /* (ignored) */
|
|
UINT16 SectorsPerFat; /* < FAT32 */
|
|
UINT16 SectorsPerTrack; /* (ignored) */
|
|
UINT16 Heads; /* (ignored) */
|
|
UINT32 HiddenSectors; /* (ignored) */
|
|
UINT32 LargeSectors; /* Used if Sectors==0 */
|
|
|
|
UINT32 LargeSectorsPerFat; /* FAT32 */
|
|
UINT16 ExtendedFlags; /* FAT32 (ignored) */
|
|
UINT16 FsVersion; /* FAT32 (ignored) */
|
|
UINT32 RootDirFirstCluster; /* FAT32 */
|
|
UINT16 FsInfoSector; /* FAT32 */
|
|
UINT16 BackupBootSector; /* FAT32 */
|
|
UINT8 Reserved[12]; /* FAT32 (ignored) */
|
|
|
|
UINT8 PhysicalDriveNumber; /* (ignored) */
|
|
UINT8 CurrentHead; /* holds boot_sector_dirty bit */
|
|
UINT8 Signature; /* (ignored) */
|
|
|
|
CHAR8 Id[4];
|
|
CHAR8 FatLabel[11];
|
|
CHAR8 SystemId[8];
|
|
} FAT_BOOT_SECTOR_EX;
|
|
|
|
/*
|
|
* ignored - means not used in the EFI driver
|
|
*
|
|
* For <Fat32 RootEntries indicates the number of entries in the root directory,
|
|
* and SectorsPerFat is used to size the fact table
|
|
*/
|
|
|
|
typedef struct {
|
|
UINT16 Day:5;
|
|
UINT16 Month:4;
|
|
UINT16 Year:7; /* From 1980 */
|
|
} FAT_DATE;
|
|
|
|
typedef struct {
|
|
UINT16 DoubleSecond:5;
|
|
UINT16 Minute:6;
|
|
UINT16 Hour:5;
|
|
} FAT_TIME;
|
|
|
|
typedef struct {
|
|
FAT_TIME Time;
|
|
FAT_DATE Date;
|
|
} FAT_DATE_TIME;
|
|
|
|
|
|
typedef struct {
|
|
CHAR8 FileName[11]; /* 8.3 filename */
|
|
UINT8 Attributes;
|
|
UINT8 CaseFlag;
|
|
UINT8 CreateMillisecond; /* (creation milliseconds - ignored) */
|
|
FAT_DATE_TIME FileCreateTime;
|
|
FAT_DATE FileLastAccess;
|
|
UINT16 FileClusterHigh; /* >= FAT32 */
|
|
FAT_DATE_TIME FileModificationTime;
|
|
UINT16 FileCluster;
|
|
UINT32 FileSize;
|
|
} FAT_DIRECTORY_ENTRY;
|
|
|
|
#pragma pack()
|