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/** @file
Save Non-Volatile Variables to a file system.
Copyright (c) 2009, 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 __NV_VARS_FILE_LIB_INSTANCE__
#define __NV_VARS_FILE_LIB_INSTANCE__
#include <Uefi.h>
#include <Guid/FileInfo.h>
#include <Protocol/SimpleFileSystem.h>
#include <Library/BaseLib.h>
#include <Library/FileHandleLib.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Library/UefiRuntimeServicesTableLib.h>
#include <Library/UefiLib.h>
/**
Loads the non-volatile variables from the NvVars file on the
given file system.
@param[in] FsHandle - Handle for a gEfiSimpleFileSystemProtocolGuid instance
@return EFI_STATUS based on the success or failure of load operation
**/
EFI_STATUS
LoadNvVarsFromFs (
EFI_HANDLE FsHandle
);
/**
Saves the non-volatile variables into the NvVars file on the
given file system.
@param[in] FsHandle - Handle for a gEfiSimpleFileSystemProtocolGuid instance
@return EFI_STATUS based on the success or failure of load operation
**/
EFI_STATUS
SaveNvVarsToFs (
EFI_HANDLE FsHandle
);
/**
Examines the NvVars file contents, and updates variables based on it.
@param[in] VarsBuffer - Buffer with NvVars data
@param[in] VarsBufferSize - Size of VarsBuffer in bytes
@return EFI_STATUS based on the success or failure of the operation
**/
EFI_STATUS
SetVariablesFromBuffer (
IN VOID *VarsBuffer,
IN UINTN VarsBufferSize
);
/**
Writes the variable into the file so it can be restored from
the file on future boots of the system.
@param[in] File - The file to write to
@param[in] Name - Variable name string
@param[in] NameSize - Size of Name in bytes
@param[in] Guid - GUID of variable
@param[in] Attributes - Attributes of variable
@param[in] Data - Buffer containing Data for variable
@param[in] DataSize - Size of Data in bytes
@return EFI_STATUS based on the success or failure of the operation
**/
EFI_STATUS
PackVariableIntoFile (
IN EFI_FILE_HANDLE File,
IN CHAR16 *Name,
IN UINT32 NameSize,
IN EFI_GUID *Guid,
IN UINT32 Attributes,
IN VOID *Data,
IN UINT32 DataSize
);
#endif
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