FatLiteLib.c File Reference

#include "FatLitePeim.h"

Go to the source code of this file.

Macros
#define	CHAR_FAT_VALID   0x01

Functions
CHAR16	ToUpper (IN CHAR16 Letter)
EFI_STATUS	FatReadBlock (IN PEI_FAT_PRIVATE_DATA *PrivateData, IN UINTN BlockDeviceNo, IN EFI_PEI_LBA Lba, IN UINTN BufferSize, OUT VOID *Buffer)
EFI_STATUS	FatGetCacheBlock (IN PEI_FAT_PRIVATE_DATA *PrivateData, IN UINTN BlockDeviceNo, IN UINT64 Lba, OUT CHAR8 **CachePtr)
EFI_STATUS	FatReadDisk (IN PEI_FAT_PRIVATE_DATA *PrivateData, IN UINTN BlockDeviceNo, IN UINT64 StartingAddress, IN UINTN Size, OUT VOID *Buffer)
VOID	EngFatToStr (IN UINTN FatSize, IN CHAR8 *Fat, OUT CHAR16 *Str)
BOOLEAN	EngStriColl (IN PEI_FAT_PRIVATE_DATA *PrivateData, IN CHAR16 *Str1, IN CHAR16 *Str2)

Detailed Description

General purpose supporting routines for FAT recovery PEIM

Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.

SPDX-License-Identifier: BSD-2-Clause-Patent

Definition in file FatLiteLib.c.

Macro Definition Documentation

CHAR_FAT_VALID

#define CHAR_FAT_VALID   0x01

Definition at line 12 of file FatLiteLib.c.

Function Documentation

EngFatToStr()

VOID EngFatToStr	(	IN UINTN	FatSize,
		IN CHAR8 *	Fat,
		OUT CHAR16 *	Str
	)

This version is different from the version in Unicode collation protocol in that this version strips off trailing blanks. Converts an 8.3 FAT file name using an OEM character set to a Null-terminated Unicode string. Here does not expand DBCS FAT chars.

Parameters

FatSize	The size of the string Fat in bytes.
Fat	A pointer to a Null-terminated string that contains an 8.3 file name using an OEM character set.
Str	A pointer to a Null-terminated Unicode string. The string must be allocated in advance to hold FatSize Unicode characters

Definition at line 307 of file FatLiteLib.c.

EngStriColl()

BOOLEAN EngStriColl	(	IN PEI_FAT_PRIVATE_DATA *	PrivateData,
		IN CHAR16 *	Str1,
		IN CHAR16 *	Str2
	)

Performs a case-insensitive comparison of two Null-terminated Unicode strings.

Parameters

PrivateData	Global memory map for accessing global variables
Str1	First string to perform case insensitive comparison.
Str2	Second string to perform case insensitive comparison.

Definition at line 342 of file FatLiteLib.c.

FatGetCacheBlock()

EFI_STATUS FatGetCacheBlock	(	IN PEI_FAT_PRIVATE_DATA *	PrivateData,
		IN UINTN	BlockDeviceNo,
		IN UINT64	Lba,
		OUT CHAR8 **	CachePtr
	)

Find a cache block designated to specific Block device and Lba. If not found, invalidate an oldest one and use it. (LRU cache)

Parameters

PrivateData	the global memory map.
BlockDeviceNo	the Block device.
Lba	the Logical Block Address
CachePtr	Ptr to the starting address of the memory holding the data;

Return values

EFI_SUCCESS	The function completed successfully.
EFI_DEVICE_ERROR	Something error while accessing media.

Definition at line 128 of file FatLiteLib.c.

FatReadBlock()

EFI_STATUS FatReadBlock	(	IN PEI_FAT_PRIVATE_DATA *	PrivateData,
		IN UINTN	BlockDeviceNo,
		IN EFI_PEI_LBA	Lba,
		IN UINTN	BufferSize,
		OUT VOID *	Buffer
	)

Reads a block of data from the block device by calling underlying Block I/O service.

Parameters

PrivateData	Global memory map for accessing global variables
BlockDeviceNo	The index for the block device number.
Lba	The logic block address to read data from.
BufferSize	The size of data in byte to read.
Buffer	The buffer of the

Return values

EFI_DEVICE_ERROR	The specified block device number exceeds the maximum device number.
EFI_DEVICE_ERROR	The maximum address has exceeded the maximum address of the block device.

Definition at line 54 of file FatLiteLib.c.

FatReadDisk()

EFI_STATUS FatReadDisk	(	IN PEI_FAT_PRIVATE_DATA *	PrivateData,
		IN UINTN	BlockDeviceNo,
		IN UINT64	StartingAddress,
		IN UINTN	Size,
		OUT VOID *	Buffer
	)

Disk reading.

Parameters

PrivateData	the global memory map;
BlockDeviceNo	the block device to read;
StartingAddress	the starting address.
Size	the amount of data to read.
Buffer	the buffer holding the data

Return values

EFI_SUCCESS	The function completed successfully.
EFI_DEVICE_ERROR	Something error.

Definition at line 221 of file FatLiteLib.c.

ToUpper()

CHAR16 ToUpper

(

IN CHAR16

Letter

)

Converts a union code character to upper case. This functions converts a unicode character to upper case. If the input Letter is not a lower-cased letter, the original value is returned.

Parameters

Letter

The input unicode character.

Returns

The upper cased letter.

Definition at line 26 of file FatLiteLib.c.