diff options
Diffstat (limited to 'MdeModulePkg/Universal/Variable/RuntimeDxe/reclaim.c')
| -rw-r--r-- | MdeModulePkg/Universal/Variable/RuntimeDxe/reclaim.c | 242 |
1 files changed, 242 insertions, 0 deletions
diff --git a/MdeModulePkg/Universal/Variable/RuntimeDxe/reclaim.c b/MdeModulePkg/Universal/Variable/RuntimeDxe/reclaim.c new file mode 100644 index 0000000000..0adaa8787c --- /dev/null +++ b/MdeModulePkg/Universal/Variable/RuntimeDxe/reclaim.c @@ -0,0 +1,242 @@ +/*++
+
+Copyright (c) 2006 - 2007, 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.
+
+Module Name:
+
+ reclaim.c
+
+Abstract:
+
+ Handles non-volatile variable store garbage collection, using FTW
+ (Fault Tolerant Write) protocol.
+
+Revision History
+
+--*/
+
+
+#include <Variable.h>
+#include "Common/Variable.h"
+
+EFI_STATUS
+GetFvbHandleByAddress (
+ IN EFI_PHYSICAL_ADDRESS Address,
+ OUT EFI_HANDLE *FvbHandle
+ )
+{
+ EFI_STATUS Status;
+ EFI_HANDLE *HandleBuffer;
+ UINTN HandleCount;
+ UINTN Index;
+ EFI_PHYSICAL_ADDRESS FvbBaseAddress;
+ EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL *Fvb;
+ EFI_FIRMWARE_VOLUME_HEADER *FwVolHeader;
+
+ *FvbHandle = NULL;
+ //
+ // Locate all handles of Fvb protocol
+ //
+ Status = gBS->LocateHandleBuffer (
+ ByProtocol,
+ &gEfiFirmwareVolumeBlockProtocolGuid,
+ NULL,
+ &HandleCount,
+ &HandleBuffer
+ );
+ if (EFI_ERROR (Status)) {
+ return EFI_NOT_FOUND;
+ }
+ //
+ // Get the FVB to access variable store
+ //
+ for (Index = 0; Index < HandleCount; Index += 1) {
+ Status = gBS->HandleProtocol (
+ HandleBuffer[Index],
+ &gEfiFirmwareVolumeBlockProtocolGuid,
+ (VOID **) &Fvb
+ );
+ if (EFI_ERROR (Status)) {
+ Status = EFI_NOT_FOUND;
+ break;
+ }
+ //
+ // Compare the address and select the right one
+ //
+ Status = Fvb->GetPhysicalAddress (Fvb, &FvbBaseAddress);
+ if (EFI_ERROR (Status)) {
+ continue;
+ }
+
+ FwVolHeader = (EFI_FIRMWARE_VOLUME_HEADER *) ((UINTN) FvbBaseAddress);
+ if ((Address >= FvbBaseAddress) && (Address <= (FvbBaseAddress + FwVolHeader->FvLength))) {
+ *FvbHandle = HandleBuffer[Index];
+ Status = EFI_SUCCESS;
+ break;
+ }
+ }
+
+ FreePool (HandleBuffer);
+ return Status;
+}
+
+STATIC
+EFI_STATUS
+GetLbaAndOffsetByAddress (
+ IN EFI_PHYSICAL_ADDRESS Address,
+ OUT EFI_LBA *Lba,
+ OUT UINTN *Offset
+ )
+{
+ EFI_STATUS Status;
+ EFI_HANDLE FvbHandle;
+ EFI_PHYSICAL_ADDRESS FvbBaseAddress;
+ EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL *Fvb;
+ EFI_FIRMWARE_VOLUME_HEADER *FwVolHeader;
+ EFI_FV_BLOCK_MAP_ENTRY *FvbMapEntry;
+ UINT32 LbaIndex;
+
+ *Lba = (EFI_LBA) (-1);
+ *Offset = 0;
+
+ //
+ // Get the proper FVB
+ //
+ Status = GetFvbHandleByAddress (Address, &FvbHandle);
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ Status = gBS->HandleProtocol (
+ FvbHandle,
+ &gEfiFirmwareVolumeBlockProtocolGuid,
+ (VOID **) &Fvb
+ );
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+ //
+ // Get the Base Address of FV
+ //
+ Status = Fvb->GetPhysicalAddress (Fvb, &FvbBaseAddress);
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ FwVolHeader = (EFI_FIRMWARE_VOLUME_HEADER *) ((UINTN) FvbBaseAddress);
+
+ //
+ // Get the (LBA, Offset) of Address
+ //
+ if ((Address >= FvbBaseAddress) && (Address <= (FvbBaseAddress + FwVolHeader->FvLength))) {
+ if ((FwVolHeader->FvLength) > (FwVolHeader->HeaderLength)) {
+ //
+ // BUGBUG: Assume one FV has one type of BlockLength
+ //
+ FvbMapEntry = &FwVolHeader->BlockMap[0];
+ for (LbaIndex = 1; LbaIndex <= FvbMapEntry->NumBlocks; LbaIndex += 1) {
+ if (Address < (FvbBaseAddress + FvbMapEntry->Length * LbaIndex)) {
+ //
+ // Found the (Lba, Offset)
+ //
+ *Lba = LbaIndex - 1;
+ *Offset = (UINTN) (Address - (FvbBaseAddress + FvbMapEntry->Length * (LbaIndex - 1)));
+ return EFI_SUCCESS;
+ }
+ }
+ }
+ }
+
+ return EFI_ABORTED;
+}
+
+EFI_STATUS
+FtwVariableSpace (
+ IN EFI_PHYSICAL_ADDRESS VariableBase,
+ IN UINT8 *Buffer,
+ IN UINTN BufferSize
+ )
+/*++
+
+Routine Description:
+ Write a buffer to Variable space, in the working block.
+
+Arguments:
+ FvbHandle - Indicates a handle to FVB to access variable store
+ Buffer - Point to the input buffer
+ BufferSize - The number of bytes of the input Buffer
+
+Returns:
+ EFI_SUCCESS - The function completed successfully
+ EFI_ABORTED - The function could not complete successfully
+ EFI_NOT_FOUND - Locate FVB protocol by handle fails
+
+--*/
+{
+ EFI_STATUS Status;
+ EFI_HANDLE FvbHandle;
+ EFI_FTW_LITE_PROTOCOL *FtwLiteProtocol;
+ EFI_LBA VarLba;
+ UINTN VarOffset;
+ UINT8 *FtwBuffer;
+ UINTN FtwBufferSize;
+
+ //
+ // Locate fault tolerant write protocol
+ //
+ Status = gBS->LocateProtocol (
+ &gEfiFaultTolerantWriteLiteProtocolGuid,
+ NULL,
+ (VOID **) &FtwLiteProtocol
+ );
+ if (EFI_ERROR (Status)) {
+ return EFI_NOT_FOUND;
+ }
+ //
+ // Locate Fvb handle by address
+ //
+ Status = GetFvbHandleByAddress (VariableBase, &FvbHandle);
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+ //
+ // Get LBA and Offset by address
+ //
+ Status = GetLbaAndOffsetByAddress (VariableBase, &VarLba, &VarOffset);
+ if (EFI_ERROR (Status)) {
+ return EFI_ABORTED;
+ }
+ //
+ // Prepare for the variable data
+ //
+ FtwBufferSize = ((VARIABLE_STORE_HEADER *) ((UINTN) VariableBase))->Size;
+ FtwBuffer = AllocateRuntimePool (FtwBufferSize);
+ if (FtwBuffer == NULL) {
+ return EFI_OUT_OF_RESOURCES;
+ }
+
+ SetMem (FtwBuffer, FtwBufferSize, (UINT8) 0xff);
+ CopyMem (FtwBuffer, Buffer, BufferSize);
+
+ //
+ // FTW write record
+ //
+ Status = FtwLiteProtocol->Write (
+ FtwLiteProtocol,
+ FvbHandle,
+ VarLba, // LBA
+ VarOffset, // Offset
+ &FtwBufferSize, // NumBytes,
+ FtwBuffer
+ );
+
+ FreePool (FtwBuffer);
+ return Status;
+}
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