SecurityPkg/VariableAuthenticated/EsalVariableDxeSal/Reclaim.c File Reference


Functions

EFI_STATUS GetFvbHandleByAddress (IN EFI_PHYSICAL_ADDRESS Address, OUT EFI_HANDLE *FvbHandle)
EFI_STATUS GetLbaAndOffsetByAddress (IN EFI_PHYSICAL_ADDRESS Address, OUT EFI_LBA *Lba, OUT UINTN *Offset)
EFI_STATUS FtwVariableSpace (IN EFI_PHYSICAL_ADDRESS VariableBase, IN UINT8 *Buffer, IN UINTN BufferSize)

Detailed Description

Handles non-volatile variable store garbage collection, using FTW (Fault Tolerant Write) protocol.

Copyright (c) 2006 - 2011, Intel Corporation. All rights reserved.
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.


Function Documentation

EFI_STATUS FtwVariableSpace ( IN EFI_PHYSICAL_ADDRESS  VariableBase,
IN UINT8 *  Buffer,
IN UINTN  BufferSize 
)

Writes a buffer to variable storage space.

This function writes a buffer to variable storage space into firmware volume block device. The destination is specified by parameter VariableBase. Fault Tolerant Write protocol is used for writing.

Parameters:
[in] VariableBase The base address of the variable to write.
[in] Buffer Points to the data buffer.
[in] BufferSize The number of bytes of the data Buffer.
Return values:
EFI_SUCCESS The function completed successfully.
EFI_NOT_FOUND Fail to locate Fault Tolerant Write protocol.
Other The function could not complete successfully.

References EFI_STATUS(), GetFvbHandleByAddress(), GetLbaAndOffsetByAddress(), and UINTN().

Referenced by Reclaim().

EFI_STATUS GetFvbHandleByAddress ( IN EFI_PHYSICAL_ADDRESS  Address,
OUT EFI_HANDLE *  FvbHandle 
)

Gets firmware volume block handle by given address.

This function gets firmware volume block handle whose address range contains the parameter Address.

Parameters:
[in] Address Address which should be contained by returned FVB handle.
[out] FvbHandle Pointer to FVB handle for output.
Return values:
EFI_SUCCESS FVB handle successfully returned.
EFI_NOT_FOUND Failed to find FVB handle by address.

References EFI_STATUS(), and UINTN().

Referenced by FtwVariableSpace(), and GetLbaAndOffsetByAddress().

EFI_STATUS GetLbaAndOffsetByAddress ( IN EFI_PHYSICAL_ADDRESS  Address,
OUT EFI_LBA *  Lba,
OUT UINTN *  Offset 
)

Gets LBA of block and offset by given address.

This function gets the Logical Block Address (LBA) of firmware volume block containing the given address, and the offset of address on the block.

Parameters:
[in] Address Address which should be contained by returned FVB handle.
[out] Lba The pointer to LBA for output.
[out] Offset The pointer to offset for output.
Return values:
EFI_SUCCESS LBA and offset successfully returned.
EFI_NOT_FOUND Failed to find FVB handle by address.
EFI_ABORTED Failed to find valid LBA and offset.

References EFI_STATUS(), GetFvbHandleByAddress(), and UINTN().

Referenced by FtwVariableSpace().


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