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git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@10439 6f19259b-4bc3-4df7-8a09-765794883524
104 lines
2.6 KiB
C
104 lines
2.6 KiB
C
/** @file
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Save Non-Volatile Variables to a file system.
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Copyright (c) 2009, 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 __NV_VARS_FILE_LIB_INSTANCE__
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#define __NV_VARS_FILE_LIB_INSTANCE__
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#include <Uefi.h>
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#include <Guid/FileInfo.h>
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#include <Protocol/SimpleFileSystem.h>
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#include <Library/BaseLib.h>
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#include <Library/FileHandleLib.h>
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#include <Library/UefiBootServicesTableLib.h>
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#include <Library/UefiRuntimeServicesTableLib.h>
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#include <Library/UefiLib.h>
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/**
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Loads the non-volatile variables from the NvVars file on the
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given file system.
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@param[in] FsHandle - Handle for a gEfiSimpleFileSystemProtocolGuid instance
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@return EFI_STATUS based on the success or failure of load operation
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**/
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EFI_STATUS
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LoadNvVarsFromFs (
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EFI_HANDLE FsHandle
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);
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/**
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Saves the non-volatile variables into the NvVars file on the
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given file system.
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@param[in] FsHandle - Handle for a gEfiSimpleFileSystemProtocolGuid instance
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@return EFI_STATUS based on the success or failure of load operation
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**/
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EFI_STATUS
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SaveNvVarsToFs (
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EFI_HANDLE FsHandle
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);
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/**
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Examines the NvVars file contents, and updates variables based on it.
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@param[in] VarsBuffer - Buffer with NvVars data
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@param[in] VarsBufferSize - Size of VarsBuffer in bytes
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@return EFI_STATUS based on the success or failure of the operation
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**/
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EFI_STATUS
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SetVariablesFromBuffer (
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IN VOID *VarsBuffer,
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IN UINTN VarsBufferSize
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);
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/**
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Writes the variable into the file so it can be restored from
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the file on future boots of the system.
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@param[in] File - The file to write to
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@param[in] Name - Variable name string
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@param[in] NameSize - Size of Name in bytes
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@param[in] Guid - GUID of variable
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@param[in] Attributes - Attributes of variable
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@param[in] Data - Buffer containing Data for variable
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@param[in] DataSize - Size of Data in bytes
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@return EFI_STATUS based on the success or failure of the operation
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**/
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EFI_STATUS
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PackVariableIntoFile (
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IN EFI_FILE_HANDLE File,
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IN CHAR16 *Name,
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IN UINT32 NameSize,
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IN EFI_GUID *Guid,
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IN UINT32 Attributes,
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IN VOID *Data,
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IN UINT32 DataSize
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);
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#endif
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