-/*++ @file NorFlashFvbDxe.c
-
- Copyright (c) 2011-2012, ARM Ltd. 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.
-
- --*/
-
-#include <PiDxe.h>
-
-#include <Library/PcdLib.h>
-#include <Library/BaseLib.h>
-#include <Library/HobLib.h>
-#include <Library/UefiLib.h>
-#include <Library/BaseMemoryLib.h>
-#include <Library/MemoryAllocationLib.h>
-#include <Library/UefiBootServicesTableLib.h>
-
-#include <Guid/VariableFormat.h>
-#include <Guid/SystemNvDataGuid.h>
-
-#include "NorFlashDxe.h"
-
-
-///
-/// The Firmware Volume Block Protocol is the low-level interface
-/// to a firmware volume. File-level access to a firmware volume
-/// should not be done using the Firmware Volume Block Protocol.
-/// Normal access to a firmware volume must use the Firmware
-/// Volume Protocol. Typically, only the file system driver that
-/// produces the Firmware Volume Protocol will bind to the
-/// Firmware Volume Block Protocol.
-///
-
-/**
- Initialises the FV Header and Variable Store Header
- to support variable operations.
-
- @param[in] Ptr - Location to initialise the headers
-
-**/
-EFI_STATUS
-InitializeFvAndVariableStoreHeaders (
- IN NOR_FLASH_INSTANCE *Instance
- )
-{
- EFI_STATUS Status;
- VOID* Headers;
- UINTN HeadersLength;
- EFI_FIRMWARE_VOLUME_HEADER *FirmwareVolumeHeader;
- VARIABLE_STORE_HEADER *VariableStoreHeader;
-
- if (!Instance->Initialized && Instance->Initialize) {
- Instance->Initialize (Instance);
- }
-
- HeadersLength = sizeof(EFI_FIRMWARE_VOLUME_HEADER) + sizeof(EFI_FV_BLOCK_MAP_ENTRY) + sizeof(VARIABLE_STORE_HEADER);
- Headers = AllocateZeroPool(HeadersLength);
-
- // FirmwareVolumeHeader->FvLength is declared to have the Variable area AND the FTW working area AND the FTW Spare contiguous.
- ASSERT(PcdGet32(PcdFlashNvStorageVariableBase) + PcdGet32(PcdFlashNvStorageVariableSize) == PcdGet32(PcdFlashNvStorageFtwWorkingBase));
- ASSERT(PcdGet32(PcdFlashNvStorageFtwWorkingBase) + PcdGet32(PcdFlashNvStorageFtwWorkingSize) == PcdGet32(PcdFlashNvStorageFtwSpareBase));
-
- // Check if the size of the area is at least one block size
- ASSERT((PcdGet32(PcdFlashNvStorageVariableSize) > 0) && (PcdGet32(PcdFlashNvStorageVariableSize) / Instance->Media.BlockSize > 0));
- ASSERT((PcdGet32(PcdFlashNvStorageFtwWorkingSize) > 0) && (PcdGet32(PcdFlashNvStorageFtwWorkingSize) / Instance->Media.BlockSize > 0));
- ASSERT((PcdGet32(PcdFlashNvStorageFtwSpareSize) > 0) && (PcdGet32(PcdFlashNvStorageFtwSpareSize) / Instance->Media.BlockSize > 0));
-
- // Ensure the Variable area Base Addresses are aligned on a block size boundaries
- ASSERT(PcdGet32(PcdFlashNvStorageVariableBase) % Instance->Media.BlockSize == 0);
- ASSERT(PcdGet32(PcdFlashNvStorageFtwWorkingBase) % Instance->Media.BlockSize == 0);
- ASSERT(PcdGet32(PcdFlashNvStorageFtwSpareBase) % Instance->Media.BlockSize == 0);
-
- //
- // EFI_FIRMWARE_VOLUME_HEADER
- //
- FirmwareVolumeHeader = (EFI_FIRMWARE_VOLUME_HEADER*)Headers;
- CopyGuid (&FirmwareVolumeHeader->FileSystemGuid, &gEfiSystemNvDataFvGuid);
- FirmwareVolumeHeader->FvLength =
- PcdGet32(PcdFlashNvStorageVariableSize) +
- PcdGet32(PcdFlashNvStorageFtwWorkingSize) +
- PcdGet32(PcdFlashNvStorageFtwSpareSize);
- FirmwareVolumeHeader->Signature = EFI_FVH_SIGNATURE;
- FirmwareVolumeHeader->Attributes = (EFI_FVB_ATTRIBUTES_2) (
- EFI_FVB2_READ_ENABLED_CAP | // Reads may be enabled
- EFI_FVB2_READ_STATUS | // Reads are currently enabled
- EFI_FVB2_STICKY_WRITE | // A block erase is required to flip bits into EFI_FVB2_ERASE_POLARITY
- EFI_FVB2_MEMORY_MAPPED | // It is memory mapped
- EFI_FVB2_ERASE_POLARITY | // After erasure all bits take this value (i.e. '1')
- EFI_FVB2_WRITE_STATUS | // Writes are currently enabled
- EFI_FVB2_WRITE_ENABLED_CAP // Writes may be enabled
- );
- FirmwareVolumeHeader->HeaderLength = sizeof(EFI_FIRMWARE_VOLUME_HEADER) + sizeof(EFI_FV_BLOCK_MAP_ENTRY);
- FirmwareVolumeHeader->Revision = EFI_FVH_REVISION;
- FirmwareVolumeHeader->BlockMap[0].NumBlocks = Instance->Media.LastBlock + 1;
- FirmwareVolumeHeader->BlockMap[0].Length = Instance->Media.BlockSize;
- FirmwareVolumeHeader->BlockMap[1].NumBlocks = 0;
- FirmwareVolumeHeader->BlockMap[1].Length = 0;
- FirmwareVolumeHeader->Checksum = CalculateCheckSum16 ((UINT16*)FirmwareVolumeHeader,FirmwareVolumeHeader->HeaderLength);
-
- //
- // VARIABLE_STORE_HEADER
- //
- VariableStoreHeader = (VARIABLE_STORE_HEADER*)((UINT32)Headers + FirmwareVolumeHeader->HeaderLength);
- CopyGuid (&VariableStoreHeader->Signature, &gEfiVariableGuid);
- VariableStoreHeader->Size = PcdGet32(PcdFlashNvStorageVariableSize) - FirmwareVolumeHeader->HeaderLength;
- VariableStoreHeader->Format = VARIABLE_STORE_FORMATTED;
- VariableStoreHeader->State = VARIABLE_STORE_HEALTHY;
-
- // Install the combined super-header in the NorFlash
- Status = FvbWrite (&Instance->FvbProtocol, 0, 0, &HeadersLength, Headers);
-
- FreePool (Headers);
- return Status;
-}
-
-/**
- Check the integrity of firmware volume header.
-
- @param[in] FwVolHeader - A pointer to a firmware volume header
-
- @retval EFI_SUCCESS - The firmware volume is consistent
- @retval EFI_NOT_FOUND - The firmware volume has been corrupted.
-
-**/
-EFI_STATUS
-ValidateFvHeader (
- IN NOR_FLASH_INSTANCE *Instance
- )
-{
- UINT16 Checksum;
- EFI_FIRMWARE_VOLUME_HEADER *FwVolHeader;
- VARIABLE_STORE_HEADER *VariableStoreHeader;
- UINTN VariableStoreLength;
- UINTN FvLength;
-
- FwVolHeader = (EFI_FIRMWARE_VOLUME_HEADER*)Instance->RegionBaseAddress;
-
- FvLength = PcdGet32(PcdFlashNvStorageVariableSize) + PcdGet32(PcdFlashNvStorageFtwWorkingSize) +
- PcdGet32(PcdFlashNvStorageFtwSpareSize);
-
- //
- // Verify the header revision, header signature, length
- // Length of FvBlock cannot be 2**64-1
- // HeaderLength cannot be an odd number
- //
- if ( (FwVolHeader->Revision != EFI_FVH_REVISION)
- || (FwVolHeader->Signature != EFI_FVH_SIGNATURE)
- || (FwVolHeader->FvLength != FvLength)
- )
- {
- DEBUG ((EFI_D_ERROR, "ValidateFvHeader: No Firmware Volume header present\n"));
- return EFI_NOT_FOUND;
- }
-
- // Check the Firmware Volume Guid
- if( CompareGuid (&FwVolHeader->FileSystemGuid, &gEfiSystemNvDataFvGuid) == FALSE ) {
- DEBUG ((EFI_D_ERROR, "ValidateFvHeader: Firmware Volume Guid non-compatible\n"));
- return EFI_NOT_FOUND;
- }
-
- // Verify the header checksum
- Checksum = CalculateSum16((UINT16*)FwVolHeader, FwVolHeader->HeaderLength);
- if (Checksum != 0) {
- DEBUG ((EFI_D_ERROR, "ValidateFvHeader: FV checksum is invalid (Checksum:0x%X)\n",Checksum));
- return EFI_NOT_FOUND;
- }
-
- VariableStoreHeader = (VARIABLE_STORE_HEADER*)((UINT32)FwVolHeader + FwVolHeader->HeaderLength);
-
- // Check the Variable Store Guid
- if( CompareGuid (&VariableStoreHeader->Signature, &gEfiVariableGuid) == FALSE ) {
- DEBUG ((EFI_D_ERROR, "ValidateFvHeader: Variable Store Guid non-compatible\n"));
- return EFI_NOT_FOUND;
- }
-
- VariableStoreLength = PcdGet32 (PcdFlashNvStorageVariableSize) - FwVolHeader->HeaderLength;
- if (VariableStoreHeader->Size != VariableStoreLength) {
- DEBUG ((EFI_D_ERROR, "ValidateFvHeader: Variable Store Length does not match\n"));
- return EFI_NOT_FOUND;
- }
-
- return EFI_SUCCESS;
-}
-
-/**
- The GetAttributes() function retrieves the attributes and
- current settings of the block.
-
- @param This Indicates the EFI_FIRMWARE_VOLUME_BLOCK2_PROTOCOL instance.
-
- @param Attributes Pointer to EFI_FVB_ATTRIBUTES_2 in which the attributes and
- current settings are returned.
- Type EFI_FVB_ATTRIBUTES_2 is defined in EFI_FIRMWARE_VOLUME_HEADER.
-
- @retval EFI_SUCCESS The firmware volume attributes were returned.
-
- **/
-EFI_STATUS
-EFIAPI
-FvbGetAttributes(
- IN CONST EFI_FIRMWARE_VOLUME_BLOCK2_PROTOCOL *This,
- OUT EFI_FVB_ATTRIBUTES_2 *Attributes
- )
-{
- EFI_FVB_ATTRIBUTES_2 FlashFvbAttributes;
- NOR_FLASH_INSTANCE *Instance;
-
- Instance = INSTANCE_FROM_FVB_THIS(This);
-
- FlashFvbAttributes = (EFI_FVB_ATTRIBUTES_2) (
-
- EFI_FVB2_READ_ENABLED_CAP | // Reads may be enabled
- EFI_FVB2_READ_STATUS | // Reads are currently enabled
- EFI_FVB2_STICKY_WRITE | // A block erase is required to flip bits into EFI_FVB2_ERASE_POLARITY
- EFI_FVB2_MEMORY_MAPPED | // It is memory mapped
- EFI_FVB2_ERASE_POLARITY // After erasure all bits take this value (i.e. '1')
-
- );
-
- // Check if it is write protected
- if (Instance->Media.ReadOnly != TRUE) {
-
- FlashFvbAttributes = FlashFvbAttributes |
- EFI_FVB2_WRITE_STATUS | // Writes are currently enabled
- EFI_FVB2_WRITE_ENABLED_CAP; // Writes may be enabled
- }
-
- *Attributes = FlashFvbAttributes;
-
- DEBUG ((DEBUG_BLKIO, "FvbGetAttributes(0x%X)\n", *Attributes));
-
- return EFI_SUCCESS;
-}
-
-/**
- The SetAttributes() function sets configurable firmware volume attributes
- and returns the new settings of the firmware volume.
-
-
- @param This Indicates the EFI_FIRMWARE_VOLUME_BLOCK2_PROTOCOL instance.
-
- @param Attributes On input, Attributes is a pointer to EFI_FVB_ATTRIBUTES_2
- that contains the desired firmware volume settings.
- On successful return, it contains the new settings of
- the firmware volume.
- Type EFI_FVB_ATTRIBUTES_2 is defined in EFI_FIRMWARE_VOLUME_HEADER.
-
- @retval EFI_SUCCESS The firmware volume attributes were returned.
-
- @retval EFI_INVALID_PARAMETER The attributes requested are in conflict with the capabilities
- as declared in the firmware volume header.
-
- **/
-EFI_STATUS
-EFIAPI
-FvbSetAttributes(
- IN CONST EFI_FIRMWARE_VOLUME_BLOCK2_PROTOCOL *This,
- IN OUT EFI_FVB_ATTRIBUTES_2 *Attributes
- )
-{
- DEBUG ((DEBUG_BLKIO, "FvbSetAttributes(0x%X) is not supported\n",*Attributes));
- return EFI_UNSUPPORTED;
-}
-
-/**
- The GetPhysicalAddress() function retrieves the base address of
- a memory-mapped firmware volume. This function should be called
- only for memory-mapped firmware volumes.
-
- @param This Indicates the EFI_FIRMWARE_VOLUME_BLOCK2_PROTOCOL instance.
-
- @param Address Pointer to a caller-allocated
- EFI_PHYSICAL_ADDRESS that, on successful
- return from GetPhysicalAddress(), contains the
- base address of the firmware volume.
-
- @retval EFI_SUCCESS The firmware volume base address was returned.
-
- @retval EFI_NOT_SUPPORTED The firmware volume is not memory mapped.
-
- **/
-EFI_STATUS
-EFIAPI
-FvbGetPhysicalAddress (
- IN CONST EFI_FIRMWARE_VOLUME_BLOCK2_PROTOCOL *This,
- OUT EFI_PHYSICAL_ADDRESS *Address
- )
-{
- NOR_FLASH_INSTANCE *Instance;
-
- Instance = INSTANCE_FROM_FVB_THIS(This);
-
- DEBUG ((DEBUG_BLKIO, "FvbGetPhysicalAddress(BaseAddress=0x%08x)\n", Instance->RegionBaseAddress));
-
- ASSERT(Address != NULL);
-
- *Address = PcdGet32 (PcdFlashNvStorageVariableBase);
- return EFI_SUCCESS;
-}
-
-/**
- The GetBlockSize() function retrieves the size of the requested
- block. It also returns the number of additional blocks with
- the identical size. The GetBlockSize() function is used to
- retrieve the block map (see EFI_FIRMWARE_VOLUME_HEADER).
-
-
- @param This Indicates the EFI_FIRMWARE_VOLUME_BLOCK2_PROTOCOL instance.
-
- @param Lba Indicates the block for which to return the size.
-
- @param BlockSize Pointer to a caller-allocated UINTN in which
- the size of the block is returned.
-
- @param NumberOfBlocks Pointer to a caller-allocated UINTN in
- which the number of consecutive blocks,
- starting with Lba, is returned. All
- blocks in this range have a size of
- BlockSize.
-
-
- @retval EFI_SUCCESS The firmware volume base address was returned.
-
- @retval EFI_INVALID_PARAMETER The requested LBA is out of range.
-
- **/
-EFI_STATUS
-EFIAPI
-FvbGetBlockSize (
- IN CONST EFI_FIRMWARE_VOLUME_BLOCK2_PROTOCOL *This,
- IN EFI_LBA Lba,
- OUT UINTN *BlockSize,
- OUT UINTN *NumberOfBlocks
- )
-{
- EFI_STATUS Status;
- NOR_FLASH_INSTANCE *Instance;
-
- Instance = INSTANCE_FROM_FVB_THIS(This);
-
- DEBUG ((DEBUG_BLKIO, "FvbGetBlockSize(Lba=%ld, BlockSize=0x%x, LastBlock=%ld)\n", Lba, Instance->Media.BlockSize, Instance->Media.LastBlock));
-
- if (Lba > Instance->Media.LastBlock) {
- DEBUG ((EFI_D_ERROR, "FvbGetBlockSize: ERROR - Parameter LBA %ld is beyond the last Lba (%ld).\n", Lba, Instance->Media.LastBlock));
- Status = EFI_INVALID_PARAMETER;
- } else {
- // This is easy because in this platform each NorFlash device has equal sized blocks.
- *BlockSize = (UINTN) Instance->Media.BlockSize;
- *NumberOfBlocks = (UINTN) (Instance->Media.LastBlock - Lba + 1);
-
- DEBUG ((DEBUG_BLKIO, "FvbGetBlockSize: *BlockSize=0x%x, *NumberOfBlocks=0x%x.\n", *BlockSize, *NumberOfBlocks));
-
- Status = EFI_SUCCESS;
- }
-
- return Status;
-}
-
-/**
- Reads the specified number of bytes into a buffer from the specified block.
-
- The Read() function reads the requested number of bytes from the
- requested block and stores them in the provided buffer.
- Implementations should be mindful that the firmware volume
- might be in the ReadDisabled state. If it is in this state,
- the Read() function must return the status code
- EFI_ACCESS_DENIED without modifying the contents of the
- buffer. The Read() function must also prevent spanning block
- boundaries. If a read is requested that would span a block
- boundary, the read must read up to the boundary but not
- beyond. The output parameter NumBytes must be set to correctly
- indicate the number of bytes actually read. The caller must be
- aware that a read may be partially completed.
-
- @param This Indicates the EFI_FIRMWARE_VOLUME_BLOCK2_PROTOCOL instance.
-
- @param Lba The starting logical block index from which to read.
-
- @param Offset Offset into the block at which to begin reading.
-
- @param NumBytes Pointer to a UINTN.
- At entry, *NumBytes contains the total size of the buffer.
- At exit, *NumBytes contains the total number of bytes read.
-
- @param Buffer Pointer to a caller-allocated buffer that will be used
- to hold the data that is read.
-
- @retval EFI_SUCCESS The firmware volume was read successfully, and contents are
- in Buffer.
-
- @retval EFI_BAD_BUFFER_SIZE Read attempted across an LBA boundary.
- On output, NumBytes contains the total number of bytes
- returned in Buffer.
-
- @retval EFI_ACCESS_DENIED The firmware volume is in the ReadDisabled state.
-
- @retval EFI_DEVICE_ERROR The block device is not functioning correctly and could not be read.
-
- **/
-EFI_STATUS
-EFIAPI
-FvbRead (
- IN CONST EFI_FIRMWARE_VOLUME_BLOCK2_PROTOCOL *This,
- IN EFI_LBA Lba,
- IN UINTN Offset,
- IN OUT UINTN *NumBytes,
- IN OUT UINT8 *Buffer
- )
-{
- EFI_STATUS Status;
- EFI_STATUS TempStatus;
- UINTN BlockSize;
- UINT8 *BlockBuffer;
- NOR_FLASH_INSTANCE *Instance;
-
- Instance = INSTANCE_FROM_FVB_THIS(This);
-
- DEBUG ((DEBUG_BLKIO, "FvbRead(Parameters: Lba=%ld, Offset=0x%x, *NumBytes=0x%x, Buffer @ 0x%08x)\n", Instance->StartLba + Lba, Offset, *NumBytes, Buffer));
-
- if (!Instance->Initialized && Instance->Initialize) {
- Instance->Initialize(Instance);
- }
-
- Status = EFI_SUCCESS;
- TempStatus = Status;
-
- // Cache the block size to avoid de-referencing pointers all the time
- BlockSize = Instance->Media.BlockSize;
-
- DEBUG ((DEBUG_BLKIO, "FvbRead: Check if (Offset=0x%x + NumBytes=0x%x) <= BlockSize=0x%x\n", Offset, *NumBytes, BlockSize ));
-
- // The read must not span block boundaries.
- // We need to check each variable individually because adding two large values together overflows.
- if ((Offset >= BlockSize) ||
- (*NumBytes > BlockSize) ||
- ((Offset + *NumBytes) > BlockSize)) {
- DEBUG ((EFI_D_ERROR, "FvbRead: ERROR - EFI_BAD_BUFFER_SIZE: (Offset=0x%x + NumBytes=0x%x) > BlockSize=0x%x\n", Offset, *NumBytes, BlockSize ));
- return EFI_BAD_BUFFER_SIZE;
- }
-
- // We must have some bytes to read
- if (*NumBytes == 0) {
- return EFI_BAD_BUFFER_SIZE;
- }
-
- // FixMe: Allow an arbitrary number of bytes to be read out, not just a multiple of block size.
-
- // Allocate runtime memory to read in the NOR Flash data. Variable Services are runtime.
- BlockBuffer = AllocateRuntimePool (BlockSize);
-
- // Check if the memory allocation was successful
- if (BlockBuffer == NULL) {
- DEBUG ((EFI_D_ERROR, "FvbRead: ERROR - Could not allocate BlockBuffer @ 0x%08x.\n", BlockBuffer));
- return EFI_DEVICE_ERROR;
- }
-
- // Read NOR Flash data into shadow buffer
- TempStatus = NorFlashReadBlocks (Instance, Instance->StartLba + Lba, BlockSize, BlockBuffer);
- if (EFI_ERROR (TempStatus)) {
- // Return one of the pre-approved error statuses
- Status = EFI_DEVICE_ERROR;
- goto FREE_MEMORY;
- }
-
- // Put the data at the appropriate location inside the buffer area
- DEBUG ((DEBUG_BLKIO, "FvbRead: CopyMem( Dst=0x%08x, Src=0x%08x, Size=0x%x ).\n", Buffer, BlockBuffer + Offset, *NumBytes));
-
- CopyMem(Buffer, BlockBuffer + Offset, *NumBytes);
-
-FREE_MEMORY:
- FreePool(BlockBuffer);
- return Status;
-}
-
-/**
- Writes the specified number of bytes from the input buffer to the block.
-
- The Write() function writes the specified number of bytes from
- the provided buffer to the specified block and offset. If the
- firmware volume is sticky write, the caller must ensure that
- all the bits of the specified range to write are in the
- EFI_FVB_ERASE_POLARITY state before calling the Write()
- function, or else the result will be unpredictable. This
- unpredictability arises because, for a sticky-write firmware
- volume, a write may negate a bit in the EFI_FVB_ERASE_POLARITY
- state but cannot flip it back again. Before calling the
- Write() function, it is recommended for the caller to first call
- the EraseBlocks() function to erase the specified block to
- write. A block erase cycle will transition bits from the
- (NOT)EFI_FVB_ERASE_POLARITY state back to the
- EFI_FVB_ERASE_POLARITY state. Implementations should be
- mindful that the firmware volume might be in the WriteDisabled
- state. If it is in this state, the Write() function must
- return the status code EFI_ACCESS_DENIED without modifying the
- contents of the firmware volume. The Write() function must
- also prevent spanning block boundaries. If a write is
- requested that spans a block boundary, the write must store up
- to the boundary but not beyond. The output parameter NumBytes
- must be set to correctly indicate the number of bytes actually
- written. The caller must be aware that a write may be
- partially completed. All writes, partial or otherwise, must be
- fully flushed to the hardware before the Write() service
- returns.
-
- @param This Indicates the EFI_FIRMWARE_VOLUME_BLOCK2_PROTOCOL instance.
-
- @param Lba The starting logical block index to write to.
-
- @param Offset Offset into the block at which to begin writing.
-
- @param NumBytes The pointer to a UINTN.
- At entry, *NumBytes contains the total size of the buffer.
- At exit, *NumBytes contains the total number of bytes actually written.
-
- @param Buffer The pointer to a caller-allocated buffer that contains the source for the write.
-
- @retval EFI_SUCCESS The firmware volume was written successfully.
-
- @retval EFI_BAD_BUFFER_SIZE The write was attempted across an LBA boundary.
- On output, NumBytes contains the total number of bytes
- actually written.
-
- @retval EFI_ACCESS_DENIED The firmware volume is in the WriteDisabled state.
-
- @retval EFI_DEVICE_ERROR The block device is malfunctioning and could not be written.
-
-
- **/
-EFI_STATUS
-EFIAPI
-FvbWrite (
- IN CONST EFI_FIRMWARE_VOLUME_BLOCK2_PROTOCOL *This,
- IN EFI_LBA Lba,
- IN UINTN Offset,
- IN OUT UINTN *NumBytes,
- IN UINT8 *Buffer
- )
-{
- EFI_STATUS Status;
- EFI_STATUS TempStatus;
- UINTN BlockSize;
- UINT8 *BlockBuffer;
- NOR_FLASH_INSTANCE *Instance;
-
- Instance = INSTANCE_FROM_FVB_THIS(This);
-
- if (!Instance->Initialized && Instance->Initialize) {
- Instance->Initialize(Instance);
- }
-
- DEBUG ((DEBUG_BLKIO, "FvbWrite(Parameters: Lba=%ld, Offset=0x%x, *NumBytes=0x%x, Buffer @ 0x%08x)\n", Instance->StartLba + Lba, Offset, *NumBytes, Buffer));
-
- Status = EFI_SUCCESS;
- TempStatus = Status;
-
- // Detect WriteDisabled state
- if (Instance->Media.ReadOnly == TRUE) {
- DEBUG ((EFI_D_ERROR, "FvbWrite: ERROR - Can not write: Device is in WriteDisabled state.\n"));
- // It is in WriteDisabled state, return an error right away
- return EFI_ACCESS_DENIED;
- }
-
- // Cache the block size to avoid de-referencing pointers all the time
- BlockSize = Instance->Media.BlockSize;
-
- // The write must not span block boundaries.
- // We need to check each variable individually because adding two large values together overflows.
- if ( ( Offset >= BlockSize ) ||
- ( *NumBytes > BlockSize ) ||
- ( (Offset + *NumBytes) > BlockSize ) ) {
- DEBUG ((EFI_D_ERROR, "FvbWrite: ERROR - EFI_BAD_BUFFER_SIZE: (Offset=0x%x + NumBytes=0x%x) > BlockSize=0x%x\n", Offset, *NumBytes, BlockSize ));
- return EFI_BAD_BUFFER_SIZE;
- }
-
- // We must have some bytes to write
- if (*NumBytes == 0) {
- DEBUG ((EFI_D_ERROR, "FvbWrite: ERROR - EFI_BAD_BUFFER_SIZE: (Offset=0x%x + NumBytes=0x%x) > BlockSize=0x%x\n", Offset, *NumBytes, BlockSize ));
- return EFI_BAD_BUFFER_SIZE;
- }
-
- // Allocate runtime memory to read in the NOR Flash data.
- // Since the intention is to use this with Variable Services and since these are runtime,
- // allocate the memory from the runtime pool.
- BlockBuffer = AllocateRuntimePool (BlockSize);
-
- // Check we did get some memory
- if( BlockBuffer == NULL ) {
- DEBUG ((EFI_D_ERROR, "FvbWrite: ERROR - Can not allocate BlockBuffer @ 0x%08x.\n", BlockBuffer));
- return EFI_DEVICE_ERROR;
- }
-
- // Read NOR Flash data into shadow buffer
- TempStatus = NorFlashReadBlocks (Instance, Instance->StartLba + Lba, BlockSize, BlockBuffer);
- if (EFI_ERROR (TempStatus)) {
- // Return one of the pre-approved error statuses
- Status = EFI_DEVICE_ERROR;
- goto FREE_MEMORY;
- }
-
- // Put the data at the appropriate location inside the buffer area
- CopyMem((BlockBuffer + Offset), Buffer, *NumBytes);
-
- // Write the modified buffer back to the NorFlash
- Status = NorFlashWriteBlocks (Instance, Instance->StartLba + Lba, BlockSize, BlockBuffer);
- if (EFI_ERROR (TempStatus)) {
- // Return one of the pre-approved error statuses
- Status = EFI_DEVICE_ERROR;
- goto FREE_MEMORY;
- }
-
-FREE_MEMORY:
- FreePool(BlockBuffer);
- return Status;
-}
-
-/**
- Erases and initialises a firmware volume block.
-
- The EraseBlocks() function erases one or more blocks as denoted
- by the variable argument list. The entire parameter list of
- blocks must be verified before erasing any blocks. If a block is
- requested that does not exist within the associated firmware
- volume (it has a larger index than the last block of the
- firmware volume), the EraseBlocks() function must return the
- status code EFI_INVALID_PARAMETER without modifying the contents
- of the firmware volume. Implementations should be mindful that
- the firmware volume might be in the WriteDisabled state. If it
- is in this state, the EraseBlocks() function must return the
- status code EFI_ACCESS_DENIED without modifying the contents of
- the firmware volume. All calls to EraseBlocks() must be fully
- flushed to the hardware before the EraseBlocks() service
- returns.
-
- @param This Indicates the EFI_FIRMWARE_VOLUME_BLOCK2_PROTOCOL
- instance.
-
- @param ... The variable argument list is a list of tuples.
- Each tuple describes a range of LBAs to erase
- and consists of the following:
- - An EFI_LBA that indicates the starting LBA
- - A UINTN that indicates the number of blocks to erase.
-
- The list is terminated with an EFI_LBA_LIST_TERMINATOR.
- For example, the following indicates that two ranges of blocks
- (5-7 and 10-11) are to be erased:
- EraseBlocks (This, 5, 3, 10, 2, EFI_LBA_LIST_TERMINATOR);
-
- @retval EFI_SUCCESS The erase request successfully completed.
-
- @retval EFI_ACCESS_DENIED The firmware volume is in the WriteDisabled state.
-
- @retval EFI_DEVICE_ERROR The block device is not functioning correctly and could not be written.
- The firmware device may have been partially erased.
-
- @retval EFI_INVALID_PARAMETER One or more of the LBAs listed in the variable argument list do
- not exist in the firmware volume.
-
- **/
-EFI_STATUS
-EFIAPI
-FvbEraseBlocks (
- IN CONST EFI_FIRMWARE_VOLUME_BLOCK2_PROTOCOL *This,
- ...
- )
-{
- EFI_STATUS Status;
- VA_LIST Args;
- UINTN BlockAddress; // Physical address of Lba to erase
- EFI_LBA StartingLba; // Lba from which we start erasing
- UINTN NumOfLba; // Number of Lba blocks to erase
- NOR_FLASH_INSTANCE *Instance;
-
- Instance = INSTANCE_FROM_FVB_THIS(This);
-
- DEBUG ((DEBUG_BLKIO, "FvbEraseBlocks()\n"));
-
- Status = EFI_SUCCESS;
-
- // Detect WriteDisabled state
- if (Instance->Media.ReadOnly == TRUE) {
- // Firmware volume is in WriteDisabled state
- DEBUG ((EFI_D_ERROR, "FvbEraseBlocks: ERROR - Device is in WriteDisabled state.\n"));
- return EFI_ACCESS_DENIED;
- }
-
- // Before erasing, check the entire list of parameters to ensure all specified blocks are valid
-
- VA_START (Args, This);
- do {
- // Get the Lba from which we start erasing
- StartingLba = VA_ARG (Args, EFI_LBA);
-
- // Have we reached the end of the list?
- if (StartingLba == EFI_LBA_LIST_TERMINATOR) {
- //Exit the while loop
- break;
- }
-
- // How many Lba blocks are we requested to erase?
- NumOfLba = VA_ARG (Args, UINT32);
-
- // All blocks must be within range
- DEBUG ((DEBUG_BLKIO, "FvbEraseBlocks: Check if: ( StartingLba=%ld + NumOfLba=%d - 1 ) > LastBlock=%ld.\n", Instance->StartLba + StartingLba, NumOfLba, Instance->Media.LastBlock));
- if ((NumOfLba == 0) || ((Instance->StartLba + StartingLba + NumOfLba - 1) > Instance->Media.LastBlock)) {
- VA_END (Args);
- DEBUG ((EFI_D_ERROR, "FvbEraseBlocks: ERROR - Lba range goes past the last Lba.\n"));
- Status = EFI_INVALID_PARAMETER;
- goto EXIT;
- }
- } while (TRUE);
- VA_END (Args);
-
- //
- // To get here, all must be ok, so start erasing
- //
- VA_START (Args, This);
- do {
- // Get the Lba from which we start erasing
- StartingLba = VA_ARG (Args, EFI_LBA);
-
- // Have we reached the end of the list?
- if (StartingLba == EFI_LBA_LIST_TERMINATOR) {
- // Exit the while loop
- break;
- }
-
- // How many Lba blocks are we requested to erase?
- NumOfLba = VA_ARG (Args, UINT32);
-
- // Go through each one and erase it
- while (NumOfLba > 0) {
-
- // Get the physical address of Lba to erase
- BlockAddress = GET_NOR_BLOCK_ADDRESS (
- Instance->RegionBaseAddress,
- Instance->StartLba + StartingLba,
- Instance->Media.BlockSize
- );
-
- // Erase it
- DEBUG ((DEBUG_BLKIO, "FvbEraseBlocks: Erasing Lba=%ld @ 0x%08x.\n", Instance->StartLba + StartingLba, BlockAddress));
- Status = NorFlashUnlockAndEraseSingleBlock (Instance, BlockAddress);
- if (EFI_ERROR(Status)) {
- VA_END (Args);
- Status = EFI_DEVICE_ERROR;
- goto EXIT;
- }
-
- // Move to the next Lba
- StartingLba++;
- NumOfLba--;
- }
- } while (TRUE);
- VA_END (Args);
-
-EXIT:
- return Status;
-}
-
-EFI_STATUS
-EFIAPI
-NorFlashFvbInitialize (
- IN NOR_FLASH_INSTANCE* Instance
- )
-{
- EFI_STATUS Status;
- UINT32 FvbNumLba;
- EFI_BOOT_MODE BootMode;
-
- DEBUG((DEBUG_BLKIO,"NorFlashFvbInitialize\n"));
-
- Instance->Initialized = TRUE;
-
- // Set the index of the first LBA for the FVB
- Instance->StartLba = (PcdGet32 (PcdFlashNvStorageVariableBase) - Instance->RegionBaseAddress) / Instance->Media.BlockSize;
-
- BootMode = GetBootModeHob ();
- if (BootMode == BOOT_WITH_DEFAULT_SETTINGS) {
- Status = EFI_INVALID_PARAMETER;
- } else {
- // Determine if there is a valid header at the beginning of the NorFlash
- Status = ValidateFvHeader (Instance);
- }
-
- // Install the Default FVB header if required
- if (EFI_ERROR(Status)) {
- // There is no valid header, so time to install one.
- DEBUG((EFI_D_ERROR,"NorFlashFvbInitialize: ERROR - The FVB Header is not valid. Installing a correct one for this volume.\n"));
-
- // Erase all the NorFlash that is reserved for variable storage
- FvbNumLba = (PcdGet32(PcdFlashNvStorageVariableSize) + PcdGet32(PcdFlashNvStorageFtwWorkingSize) + PcdGet32(PcdFlashNvStorageFtwSpareSize)) / Instance->Media.BlockSize;
-
- Status = FvbEraseBlocks (&Instance->FvbProtocol, (EFI_LBA)0, FvbNumLba, EFI_LBA_LIST_TERMINATOR);
- if (EFI_ERROR(Status)) {
- return Status;
- }
-
- // Install all appropriate headers
- Status = InitializeFvAndVariableStoreHeaders (Instance);
- if (EFI_ERROR(Status)) {
- return Status;
- }
- }
- return Status;
-}
+/*++ @file NorFlashFvbDxe.c\r
+\r
+ Copyright (c) 2011 - 2014, ARM Ltd. All rights reserved.<BR>\r
+\r
+ This program and the accompanying materials\r
+ are licensed and made available under the terms and conditions of the BSD License\r
+ which accompanies this distribution. The full text of the license may be found at\r
+ http://opensource.org/licenses/bsd-license.php\r
+\r
+ THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
+ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
+\r
+ --*/\r
+\r
+#include <PiDxe.h>\r
+\r
+#include <Library/PcdLib.h>\r
+#include <Library/BaseLib.h>\r
+#include <Library/HobLib.h>\r
+#include <Library/UefiLib.h>\r
+#include <Library/BaseMemoryLib.h>\r
+#include <Library/MemoryAllocationLib.h>\r
+#include <Library/DxeServicesTableLib.h>\r
+#include <Library/UefiBootServicesTableLib.h>\r
+\r
+#include <Guid/VariableFormat.h>\r
+#include <Guid/SystemNvDataGuid.h>\r
+\r
+#include "NorFlashDxe.h"\r
+\r
+STATIC EFI_EVENT mFvbVirtualAddrChangeEvent;\r
+STATIC UINTN mFlashNvStorageVariableBase;\r
+\r
+///\r
+/// The Firmware Volume Block Protocol is the low-level interface\r
+/// to a firmware volume. File-level access to a firmware volume\r
+/// should not be done using the Firmware Volume Block Protocol.\r
+/// Normal access to a firmware volume must use the Firmware\r
+/// Volume Protocol. Typically, only the file system driver that\r
+/// produces the Firmware Volume Protocol will bind to the\r
+/// Firmware Volume Block Protocol.\r
+///\r
+\r
+/**\r
+ Initialises the FV Header and Variable Store Header\r
+ to support variable operations.\r
+\r
+ @param[in] Ptr - Location to initialise the headers\r
+\r
+**/\r
+EFI_STATUS\r
+InitializeFvAndVariableStoreHeaders (\r
+ IN NOR_FLASH_INSTANCE *Instance\r
+ )\r
+{\r
+ EFI_STATUS Status;\r
+ VOID* Headers;\r
+ UINTN HeadersLength;\r
+ EFI_FIRMWARE_VOLUME_HEADER *FirmwareVolumeHeader;\r
+ VARIABLE_STORE_HEADER *VariableStoreHeader;\r
+\r
+ HeadersLength = sizeof(EFI_FIRMWARE_VOLUME_HEADER) + sizeof(EFI_FV_BLOCK_MAP_ENTRY) + sizeof(VARIABLE_STORE_HEADER);\r
+ Headers = AllocateZeroPool(HeadersLength);\r
+\r
+ // FirmwareVolumeHeader->FvLength is declared to have the Variable area AND the FTW working area AND the FTW Spare contiguous.\r
+ ASSERT(PcdGet32(PcdFlashNvStorageVariableBase) + PcdGet32(PcdFlashNvStorageVariableSize) == PcdGet32(PcdFlashNvStorageFtwWorkingBase));\r
+ ASSERT(PcdGet32(PcdFlashNvStorageFtwWorkingBase) + PcdGet32(PcdFlashNvStorageFtwWorkingSize) == PcdGet32(PcdFlashNvStorageFtwSpareBase));\r
+\r
+ // Check if the size of the area is at least one block size\r
+ ASSERT((PcdGet32(PcdFlashNvStorageVariableSize) > 0) && (PcdGet32(PcdFlashNvStorageVariableSize) / Instance->Media.BlockSize > 0));\r
+ ASSERT((PcdGet32(PcdFlashNvStorageFtwWorkingSize) > 0) && (PcdGet32(PcdFlashNvStorageFtwWorkingSize) / Instance->Media.BlockSize > 0));\r
+ ASSERT((PcdGet32(PcdFlashNvStorageFtwSpareSize) > 0) && (PcdGet32(PcdFlashNvStorageFtwSpareSize) / Instance->Media.BlockSize > 0));\r
+\r
+ // Ensure the Variable area Base Addresses are aligned on a block size boundaries\r
+ ASSERT(PcdGet32(PcdFlashNvStorageVariableBase) % Instance->Media.BlockSize == 0);\r
+ ASSERT(PcdGet32(PcdFlashNvStorageFtwWorkingBase) % Instance->Media.BlockSize == 0);\r
+ ASSERT(PcdGet32(PcdFlashNvStorageFtwSpareBase) % Instance->Media.BlockSize == 0);\r
+\r
+ //\r
+ // EFI_FIRMWARE_VOLUME_HEADER\r
+ //\r
+ FirmwareVolumeHeader = (EFI_FIRMWARE_VOLUME_HEADER*)Headers;\r
+ CopyGuid (&FirmwareVolumeHeader->FileSystemGuid, &gEfiSystemNvDataFvGuid);\r
+ FirmwareVolumeHeader->FvLength =\r
+ PcdGet32(PcdFlashNvStorageVariableSize) +\r
+ PcdGet32(PcdFlashNvStorageFtwWorkingSize) +\r
+ PcdGet32(PcdFlashNvStorageFtwSpareSize);\r
+ FirmwareVolumeHeader->Signature = EFI_FVH_SIGNATURE;\r
+ FirmwareVolumeHeader->Attributes = (EFI_FVB_ATTRIBUTES_2) (\r
+ EFI_FVB2_READ_ENABLED_CAP | // Reads may be enabled\r
+ EFI_FVB2_READ_STATUS | // Reads are currently enabled\r
+ EFI_FVB2_STICKY_WRITE | // A block erase is required to flip bits into EFI_FVB2_ERASE_POLARITY\r
+ EFI_FVB2_MEMORY_MAPPED | // It is memory mapped\r
+ EFI_FVB2_ERASE_POLARITY | // After erasure all bits take this value (i.e. '1')\r
+ EFI_FVB2_WRITE_STATUS | // Writes are currently enabled\r
+ EFI_FVB2_WRITE_ENABLED_CAP // Writes may be enabled\r
+ );\r
+ FirmwareVolumeHeader->HeaderLength = sizeof(EFI_FIRMWARE_VOLUME_HEADER) + sizeof(EFI_FV_BLOCK_MAP_ENTRY);\r
+ FirmwareVolumeHeader->Revision = EFI_FVH_REVISION;\r
+ FirmwareVolumeHeader->BlockMap[0].NumBlocks = Instance->Media.LastBlock + 1;\r
+ FirmwareVolumeHeader->BlockMap[0].Length = Instance->Media.BlockSize;\r
+ FirmwareVolumeHeader->BlockMap[1].NumBlocks = 0;\r
+ FirmwareVolumeHeader->BlockMap[1].Length = 0;\r
+ FirmwareVolumeHeader->Checksum = CalculateCheckSum16 ((UINT16*)FirmwareVolumeHeader,FirmwareVolumeHeader->HeaderLength);\r
+\r
+ //\r
+ // VARIABLE_STORE_HEADER\r
+ //\r
+ VariableStoreHeader = (VARIABLE_STORE_HEADER*)((UINTN)Headers + FirmwareVolumeHeader->HeaderLength);\r
+ CopyGuid (&VariableStoreHeader->Signature, &gEfiAuthenticatedVariableGuid);\r
+ VariableStoreHeader->Size = PcdGet32(PcdFlashNvStorageVariableSize) - FirmwareVolumeHeader->HeaderLength;\r
+ VariableStoreHeader->Format = VARIABLE_STORE_FORMATTED;\r
+ VariableStoreHeader->State = VARIABLE_STORE_HEALTHY;\r
+\r
+ // Install the combined super-header in the NorFlash\r
+ Status = FvbWrite (&Instance->FvbProtocol, 0, 0, &HeadersLength, Headers);\r
+\r
+ FreePool (Headers);\r
+ return Status;\r
+}\r
+\r
+/**\r
+ Check the integrity of firmware volume header.\r
+\r
+ @param[in] FwVolHeader - A pointer to a firmware volume header\r
+\r
+ @retval EFI_SUCCESS - The firmware volume is consistent\r
+ @retval EFI_NOT_FOUND - The firmware volume has been corrupted.\r
+\r
+**/\r
+EFI_STATUS\r
+ValidateFvHeader (\r
+ IN NOR_FLASH_INSTANCE *Instance\r
+ )\r
+{\r
+ UINT16 Checksum;\r
+ EFI_FIRMWARE_VOLUME_HEADER *FwVolHeader;\r
+ VARIABLE_STORE_HEADER *VariableStoreHeader;\r
+ UINTN VariableStoreLength;\r
+ UINTN FvLength;\r
+\r
+ FwVolHeader = (EFI_FIRMWARE_VOLUME_HEADER*)Instance->RegionBaseAddress;\r
+\r
+ FvLength = PcdGet32(PcdFlashNvStorageVariableSize) + PcdGet32(PcdFlashNvStorageFtwWorkingSize) +\r
+ PcdGet32(PcdFlashNvStorageFtwSpareSize);\r
+\r
+ //\r
+ // Verify the header revision, header signature, length\r
+ // Length of FvBlock cannot be 2**64-1\r
+ // HeaderLength cannot be an odd number\r
+ //\r
+ if ( (FwVolHeader->Revision != EFI_FVH_REVISION)\r
+ || (FwVolHeader->Signature != EFI_FVH_SIGNATURE)\r
+ || (FwVolHeader->FvLength != FvLength)\r
+ )\r
+ {\r
+ DEBUG ((EFI_D_INFO, "%a: No Firmware Volume header present\n",\r
+ __FUNCTION__));\r
+ return EFI_NOT_FOUND;\r
+ }\r
+\r
+ // Check the Firmware Volume Guid\r
+ if( CompareGuid (&FwVolHeader->FileSystemGuid, &gEfiSystemNvDataFvGuid) == FALSE ) {\r
+ DEBUG ((EFI_D_INFO, "%a: Firmware Volume Guid non-compatible\n",\r
+ __FUNCTION__));\r
+ return EFI_NOT_FOUND;\r
+ }\r
+\r
+ // Verify the header checksum\r
+ Checksum = CalculateSum16((UINT16*)FwVolHeader, FwVolHeader->HeaderLength);\r
+ if (Checksum != 0) {\r
+ DEBUG ((EFI_D_INFO, "%a: FV checksum is invalid (Checksum:0x%X)\n",\r
+ __FUNCTION__, Checksum));\r
+ return EFI_NOT_FOUND;\r
+ }\r
+\r
+ VariableStoreHeader = (VARIABLE_STORE_HEADER*)((UINTN)FwVolHeader + FwVolHeader->HeaderLength);\r
+\r
+ // Check the Variable Store Guid\r
+ if (!CompareGuid (&VariableStoreHeader->Signature, &gEfiVariableGuid) &&\r
+ !CompareGuid (&VariableStoreHeader->Signature, &gEfiAuthenticatedVariableGuid)) {\r
+ DEBUG ((EFI_D_INFO, "%a: Variable Store Guid non-compatible\n",\r
+ __FUNCTION__));\r
+ return EFI_NOT_FOUND;\r
+ }\r
+\r
+ VariableStoreLength = PcdGet32 (PcdFlashNvStorageVariableSize) - FwVolHeader->HeaderLength;\r
+ if (VariableStoreHeader->Size != VariableStoreLength) {\r
+ DEBUG ((EFI_D_INFO, "%a: Variable Store Length does not match\n",\r
+ __FUNCTION__));\r
+ return EFI_NOT_FOUND;\r
+ }\r
+\r
+ return EFI_SUCCESS;\r
+}\r
+\r
+/**\r
+ The GetAttributes() function retrieves the attributes and\r
+ current settings of the block.\r
+\r
+ @param This Indicates the EFI_FIRMWARE_VOLUME_BLOCK2_PROTOCOL instance.\r
+\r
+ @param Attributes Pointer to EFI_FVB_ATTRIBUTES_2 in which the attributes and\r
+ current settings are returned.\r
+ Type EFI_FVB_ATTRIBUTES_2 is defined in EFI_FIRMWARE_VOLUME_HEADER.\r
+\r
+ @retval EFI_SUCCESS The firmware volume attributes were returned.\r
+\r
+ **/\r
+EFI_STATUS\r
+EFIAPI\r
+FvbGetAttributes(\r
+ IN CONST EFI_FIRMWARE_VOLUME_BLOCK2_PROTOCOL *This,\r
+ OUT EFI_FVB_ATTRIBUTES_2 *Attributes\r
+ )\r
+{\r
+ EFI_FVB_ATTRIBUTES_2 FlashFvbAttributes;\r
+ NOR_FLASH_INSTANCE *Instance;\r
+\r
+ Instance = INSTANCE_FROM_FVB_THIS(This);\r
+\r
+ FlashFvbAttributes = (EFI_FVB_ATTRIBUTES_2) (\r
+\r
+ EFI_FVB2_READ_ENABLED_CAP | // Reads may be enabled\r
+ EFI_FVB2_READ_STATUS | // Reads are currently enabled\r
+ EFI_FVB2_STICKY_WRITE | // A block erase is required to flip bits into EFI_FVB2_ERASE_POLARITY\r
+ EFI_FVB2_MEMORY_MAPPED | // It is memory mapped\r
+ EFI_FVB2_ERASE_POLARITY // After erasure all bits take this value (i.e. '1')\r
+\r
+ );\r
+\r
+ // Check if it is write protected\r
+ if (Instance->Media.ReadOnly != TRUE) {\r
+\r
+ FlashFvbAttributes = FlashFvbAttributes |\r
+ EFI_FVB2_WRITE_STATUS | // Writes are currently enabled\r
+ EFI_FVB2_WRITE_ENABLED_CAP; // Writes may be enabled\r
+ }\r
+\r
+ *Attributes = FlashFvbAttributes;\r
+\r
+ DEBUG ((DEBUG_BLKIO, "FvbGetAttributes(0x%X)\n", *Attributes));\r
+\r
+ return EFI_SUCCESS;\r
+}\r
+\r
+/**\r
+ The SetAttributes() function sets configurable firmware volume attributes\r
+ and returns the new settings of the firmware volume.\r
+\r
+\r
+ @param This Indicates the EFI_FIRMWARE_VOLUME_BLOCK2_PROTOCOL instance.\r
+\r
+ @param Attributes On input, Attributes is a pointer to EFI_FVB_ATTRIBUTES_2\r
+ that contains the desired firmware volume settings.\r
+ On successful return, it contains the new settings of\r
+ the firmware volume.\r
+ Type EFI_FVB_ATTRIBUTES_2 is defined in EFI_FIRMWARE_VOLUME_HEADER.\r
+\r
+ @retval EFI_SUCCESS The firmware volume attributes were returned.\r
+\r
+ @retval EFI_INVALID_PARAMETER The attributes requested are in conflict with the capabilities\r
+ as declared in the firmware volume header.\r
+\r
+ **/\r
+EFI_STATUS\r
+EFIAPI\r
+FvbSetAttributes(\r
+ IN CONST EFI_FIRMWARE_VOLUME_BLOCK2_PROTOCOL *This,\r
+ IN OUT EFI_FVB_ATTRIBUTES_2 *Attributes\r
+ )\r
+{\r
+ DEBUG ((DEBUG_BLKIO, "FvbSetAttributes(0x%X) is not supported\n",*Attributes));\r
+ return EFI_UNSUPPORTED;\r
+}\r
+\r
+/**\r
+ The GetPhysicalAddress() function retrieves the base address of\r
+ a memory-mapped firmware volume. This function should be called\r
+ only for memory-mapped firmware volumes.\r
+\r
+ @param This Indicates the EFI_FIRMWARE_VOLUME_BLOCK2_PROTOCOL instance.\r
+\r
+ @param Address Pointer to a caller-allocated\r
+ EFI_PHYSICAL_ADDRESS that, on successful\r
+ return from GetPhysicalAddress(), contains the\r
+ base address of the firmware volume.\r
+\r
+ @retval EFI_SUCCESS The firmware volume base address was returned.\r
+\r
+ @retval EFI_NOT_SUPPORTED The firmware volume is not memory mapped.\r
+\r
+ **/\r
+EFI_STATUS\r
+EFIAPI\r
+FvbGetPhysicalAddress (\r
+ IN CONST EFI_FIRMWARE_VOLUME_BLOCK2_PROTOCOL *This,\r
+ OUT EFI_PHYSICAL_ADDRESS *Address\r
+ )\r
+{\r
+ NOR_FLASH_INSTANCE *Instance;\r
+\r
+ Instance = INSTANCE_FROM_FVB_THIS(This);\r
+\r
+ DEBUG ((DEBUG_BLKIO, "FvbGetPhysicalAddress(BaseAddress=0x%08x)\n", Instance->RegionBaseAddress));\r
+\r
+ ASSERT(Address != NULL);\r
+\r
+ *Address = mFlashNvStorageVariableBase;\r
+ return EFI_SUCCESS;\r
+}\r
+\r
+/**\r
+ The GetBlockSize() function retrieves the size of the requested\r
+ block. It also returns the number of additional blocks with\r
+ the identical size. The GetBlockSize() function is used to\r
+ retrieve the block map (see EFI_FIRMWARE_VOLUME_HEADER).\r
+\r
+\r
+ @param This Indicates the EFI_FIRMWARE_VOLUME_BLOCK2_PROTOCOL instance.\r
+\r
+ @param Lba Indicates the block for which to return the size.\r
+\r
+ @param BlockSize Pointer to a caller-allocated UINTN in which\r
+ the size of the block is returned.\r
+\r
+ @param NumberOfBlocks Pointer to a caller-allocated UINTN in\r
+ which the number of consecutive blocks,\r
+ starting with Lba, is returned. All\r
+ blocks in this range have a size of\r
+ BlockSize.\r
+\r
+\r
+ @retval EFI_SUCCESS The firmware volume base address was returned.\r
+\r
+ @retval EFI_INVALID_PARAMETER The requested LBA is out of range.\r
+\r
+ **/\r
+EFI_STATUS\r
+EFIAPI\r
+FvbGetBlockSize (\r
+ IN CONST EFI_FIRMWARE_VOLUME_BLOCK2_PROTOCOL *This,\r
+ IN EFI_LBA Lba,\r
+ OUT UINTN *BlockSize,\r
+ OUT UINTN *NumberOfBlocks\r
+ )\r
+{\r
+ EFI_STATUS Status;\r
+ NOR_FLASH_INSTANCE *Instance;\r
+\r
+ Instance = INSTANCE_FROM_FVB_THIS(This);\r
+\r
+ DEBUG ((DEBUG_BLKIO, "FvbGetBlockSize(Lba=%ld, BlockSize=0x%x, LastBlock=%ld)\n", Lba, Instance->Media.BlockSize, Instance->Media.LastBlock));\r
+\r
+ if (Lba > Instance->Media.LastBlock) {\r
+ DEBUG ((EFI_D_ERROR, "FvbGetBlockSize: ERROR - Parameter LBA %ld is beyond the last Lba (%ld).\n", Lba, Instance->Media.LastBlock));\r
+ Status = EFI_INVALID_PARAMETER;\r
+ } else {\r
+ // This is easy because in this platform each NorFlash device has equal sized blocks.\r
+ *BlockSize = (UINTN) Instance->Media.BlockSize;\r
+ *NumberOfBlocks = (UINTN) (Instance->Media.LastBlock - Lba + 1);\r
+\r
+ DEBUG ((DEBUG_BLKIO, "FvbGetBlockSize: *BlockSize=0x%x, *NumberOfBlocks=0x%x.\n", *BlockSize, *NumberOfBlocks));\r
+\r
+ Status = EFI_SUCCESS;\r
+ }\r
+\r
+ return Status;\r
+}\r
+\r
+/**\r
+ Reads the specified number of bytes into a buffer from the specified block.\r
+\r
+ The Read() function reads the requested number of bytes from the\r
+ requested block and stores them in the provided buffer.\r
+ Implementations should be mindful that the firmware volume\r
+ might be in the ReadDisabled state. If it is in this state,\r
+ the Read() function must return the status code\r
+ EFI_ACCESS_DENIED without modifying the contents of the\r
+ buffer. The Read() function must also prevent spanning block\r
+ boundaries. If a read is requested that would span a block\r
+ boundary, the read must read up to the boundary but not\r
+ beyond. The output parameter NumBytes must be set to correctly\r
+ indicate the number of bytes actually read. The caller must be\r
+ aware that a read may be partially completed.\r
+\r
+ @param This Indicates the EFI_FIRMWARE_VOLUME_BLOCK2_PROTOCOL instance.\r
+\r
+ @param Lba The starting logical block index from which to read.\r
+\r
+ @param Offset Offset into the block at which to begin reading.\r
+\r
+ @param NumBytes Pointer to a UINTN.\r
+ At entry, *NumBytes contains the total size of the buffer.\r
+ At exit, *NumBytes contains the total number of bytes read.\r
+\r
+ @param Buffer Pointer to a caller-allocated buffer that will be used\r
+ to hold the data that is read.\r
+\r
+ @retval EFI_SUCCESS The firmware volume was read successfully, and contents are\r
+ in Buffer.\r
+\r
+ @retval EFI_BAD_BUFFER_SIZE Read attempted across an LBA boundary.\r
+ On output, NumBytes contains the total number of bytes\r
+ returned in Buffer.\r
+\r
+ @retval EFI_ACCESS_DENIED The firmware volume is in the ReadDisabled state.\r
+\r
+ @retval EFI_DEVICE_ERROR The block device is not functioning correctly and could not be read.\r
+\r
+ **/\r
+EFI_STATUS\r
+EFIAPI\r
+FvbRead (\r
+ IN CONST EFI_FIRMWARE_VOLUME_BLOCK2_PROTOCOL *This,\r
+ IN EFI_LBA Lba,\r
+ IN UINTN Offset,\r
+ IN OUT UINTN *NumBytes,\r
+ IN OUT UINT8 *Buffer\r
+ )\r
+{\r
+ EFI_STATUS TempStatus;\r
+ UINTN BlockSize;\r
+ NOR_FLASH_INSTANCE *Instance;\r
+\r
+ Instance = INSTANCE_FROM_FVB_THIS(This);\r
+\r
+ DEBUG ((DEBUG_BLKIO, "FvbRead(Parameters: Lba=%ld, Offset=0x%x, *NumBytes=0x%x, Buffer @ 0x%08x)\n", Instance->StartLba + Lba, Offset, *NumBytes, Buffer));\r
+\r
+ TempStatus = EFI_SUCCESS;\r
+\r
+ // Cache the block size to avoid de-referencing pointers all the time\r
+ BlockSize = Instance->Media.BlockSize;\r
+\r
+ DEBUG ((DEBUG_BLKIO, "FvbRead: Check if (Offset=0x%x + NumBytes=0x%x) <= BlockSize=0x%x\n", Offset, *NumBytes, BlockSize ));\r
+\r
+ // The read must not span block boundaries.\r
+ // We need to check each variable individually because adding two large values together overflows.\r
+ if ((Offset >= BlockSize) ||\r
+ (*NumBytes > BlockSize) ||\r
+ ((Offset + *NumBytes) > BlockSize)) {\r
+ DEBUG ((EFI_D_ERROR, "FvbRead: ERROR - EFI_BAD_BUFFER_SIZE: (Offset=0x%x + NumBytes=0x%x) > BlockSize=0x%x\n", Offset, *NumBytes, BlockSize ));\r
+ return EFI_BAD_BUFFER_SIZE;\r
+ }\r
+\r
+ // We must have some bytes to read\r
+ if (*NumBytes == 0) {\r
+ return EFI_BAD_BUFFER_SIZE;\r
+ }\r
+\r
+ // Decide if we are doing full block reads or not.\r
+ if (*NumBytes % BlockSize != 0) {\r
+ TempStatus = NorFlashRead (Instance, Instance->StartLba + Lba, Offset, *NumBytes, Buffer);\r
+ if (EFI_ERROR (TempStatus)) {\r
+ return EFI_DEVICE_ERROR;\r
+ }\r
+ } else {\r
+ // Read NOR Flash data into shadow buffer\r
+ TempStatus = NorFlashReadBlocks (Instance, Instance->StartLba + Lba, BlockSize, Buffer);\r
+ if (EFI_ERROR (TempStatus)) {\r
+ // Return one of the pre-approved error statuses\r
+ return EFI_DEVICE_ERROR;\r
+ }\r
+ }\r
+ return EFI_SUCCESS;\r
+}\r
+\r
+/**\r
+ Writes the specified number of bytes from the input buffer to the block.\r
+\r
+ The Write() function writes the specified number of bytes from\r
+ the provided buffer to the specified block and offset. If the\r
+ firmware volume is sticky write, the caller must ensure that\r
+ all the bits of the specified range to write are in the\r
+ EFI_FVB_ERASE_POLARITY state before calling the Write()\r
+ function, or else the result will be unpredictable. This\r
+ unpredictability arises because, for a sticky-write firmware\r
+ volume, a write may negate a bit in the EFI_FVB_ERASE_POLARITY\r
+ state but cannot flip it back again. Before calling the\r
+ Write() function, it is recommended for the caller to first call\r
+ the EraseBlocks() function to erase the specified block to\r
+ write. A block erase cycle will transition bits from the\r
+ (NOT)EFI_FVB_ERASE_POLARITY state back to the\r
+ EFI_FVB_ERASE_POLARITY state. Implementations should be\r
+ mindful that the firmware volume might be in the WriteDisabled\r
+ state. If it is in this state, the Write() function must\r
+ return the status code EFI_ACCESS_DENIED without modifying the\r
+ contents of the firmware volume. The Write() function must\r
+ also prevent spanning block boundaries. If a write is\r
+ requested that spans a block boundary, the write must store up\r
+ to the boundary but not beyond. The output parameter NumBytes\r
+ must be set to correctly indicate the number of bytes actually\r
+ written. The caller must be aware that a write may be\r
+ partially completed. All writes, partial or otherwise, must be\r
+ fully flushed to the hardware before the Write() service\r
+ returns.\r
+\r
+ @param This Indicates the EFI_FIRMWARE_VOLUME_BLOCK2_PROTOCOL instance.\r
+\r
+ @param Lba The starting logical block index to write to.\r
+\r
+ @param Offset Offset into the block at which to begin writing.\r
+\r
+ @param NumBytes The pointer to a UINTN.\r
+ At entry, *NumBytes contains the total size of the buffer.\r
+ At exit, *NumBytes contains the total number of bytes actually written.\r
+\r
+ @param Buffer The pointer to a caller-allocated buffer that contains the source for the write.\r
+\r
+ @retval EFI_SUCCESS The firmware volume was written successfully.\r
+\r
+ @retval EFI_BAD_BUFFER_SIZE The write was attempted across an LBA boundary.\r
+ On output, NumBytes contains the total number of bytes\r
+ actually written.\r
+\r
+ @retval EFI_ACCESS_DENIED The firmware volume is in the WriteDisabled state.\r
+\r
+ @retval EFI_DEVICE_ERROR The block device is malfunctioning and could not be written.\r
+\r
+\r
+ **/\r
+EFI_STATUS\r
+EFIAPI\r
+FvbWrite (\r
+ IN CONST EFI_FIRMWARE_VOLUME_BLOCK2_PROTOCOL *This,\r
+ IN EFI_LBA Lba,\r
+ IN UINTN Offset,\r
+ IN OUT UINTN *NumBytes,\r
+ IN UINT8 *Buffer\r
+ )\r
+{\r
+ NOR_FLASH_INSTANCE *Instance;\r
+\r
+ Instance = INSTANCE_FROM_FVB_THIS (This);\r
+\r
+ return NorFlashWriteSingleBlock (Instance, Instance->StartLba + Lba, Offset, NumBytes, Buffer);\r
+}\r
+\r
+/**\r
+ Erases and initialises a firmware volume block.\r
+\r
+ The EraseBlocks() function erases one or more blocks as denoted\r
+ by the variable argument list. The entire parameter list of\r
+ blocks must be verified before erasing any blocks. If a block is\r
+ requested that does not exist within the associated firmware\r
+ volume (it has a larger index than the last block of the\r
+ firmware volume), the EraseBlocks() function must return the\r
+ status code EFI_INVALID_PARAMETER without modifying the contents\r
+ of the firmware volume. Implementations should be mindful that\r
+ the firmware volume might be in the WriteDisabled state. If it\r
+ is in this state, the EraseBlocks() function must return the\r
+ status code EFI_ACCESS_DENIED without modifying the contents of\r
+ the firmware volume. All calls to EraseBlocks() must be fully\r
+ flushed to the hardware before the EraseBlocks() service\r
+ returns.\r
+\r
+ @param This Indicates the EFI_FIRMWARE_VOLUME_BLOCK2_PROTOCOL\r
+ instance.\r
+\r
+ @param ... The variable argument list is a list of tuples.\r
+ Each tuple describes a range of LBAs to erase\r
+ and consists of the following:\r
+ - An EFI_LBA that indicates the starting LBA\r
+ - A UINTN that indicates the number of blocks to erase.\r
+\r
+ The list is terminated with an EFI_LBA_LIST_TERMINATOR.\r
+ For example, the following indicates that two ranges of blocks\r
+ (5-7 and 10-11) are to be erased:\r
+ EraseBlocks (This, 5, 3, 10, 2, EFI_LBA_LIST_TERMINATOR);\r
+\r
+ @retval EFI_SUCCESS The erase request successfully completed.\r
+\r
+ @retval EFI_ACCESS_DENIED The firmware volume is in the WriteDisabled state.\r
+\r
+ @retval EFI_DEVICE_ERROR The block device is not functioning correctly and could not be written.\r
+ The firmware device may have been partially erased.\r
+\r
+ @retval EFI_INVALID_PARAMETER One or more of the LBAs listed in the variable argument list do\r
+ not exist in the firmware volume.\r
+\r
+ **/\r
+EFI_STATUS\r
+EFIAPI\r
+FvbEraseBlocks (\r
+ IN CONST EFI_FIRMWARE_VOLUME_BLOCK2_PROTOCOL *This,\r
+ ...\r
+ )\r
+{\r
+ EFI_STATUS Status;\r
+ VA_LIST Args;\r
+ UINTN BlockAddress; // Physical address of Lba to erase\r
+ EFI_LBA StartingLba; // Lba from which we start erasing\r
+ UINTN NumOfLba; // Number of Lba blocks to erase\r
+ NOR_FLASH_INSTANCE *Instance;\r
+\r
+ Instance = INSTANCE_FROM_FVB_THIS(This);\r
+\r
+ DEBUG ((DEBUG_BLKIO, "FvbEraseBlocks()\n"));\r
+\r
+ Status = EFI_SUCCESS;\r
+\r
+ // Detect WriteDisabled state\r
+ if (Instance->Media.ReadOnly == TRUE) {\r
+ // Firmware volume is in WriteDisabled state\r
+ DEBUG ((EFI_D_ERROR, "FvbEraseBlocks: ERROR - Device is in WriteDisabled state.\n"));\r
+ return EFI_ACCESS_DENIED;\r
+ }\r
+\r
+ // Before erasing, check the entire list of parameters to ensure all specified blocks are valid\r
+\r
+ VA_START (Args, This);\r
+ do {\r
+ // Get the Lba from which we start erasing\r
+ StartingLba = VA_ARG (Args, EFI_LBA);\r
+\r
+ // Have we reached the end of the list?\r
+ if (StartingLba == EFI_LBA_LIST_TERMINATOR) {\r
+ //Exit the while loop\r
+ break;\r
+ }\r
+\r
+ // How many Lba blocks are we requested to erase?\r
+ NumOfLba = VA_ARG (Args, UINTN);\r
+\r
+ // All blocks must be within range\r
+ DEBUG ((\r
+ DEBUG_BLKIO,\r
+ "FvbEraseBlocks: Check if: ( StartingLba=%ld + NumOfLba=%Lu - 1 ) > LastBlock=%ld.\n",\r
+ Instance->StartLba + StartingLba,\r
+ (UINT64)NumOfLba,\r
+ Instance->Media.LastBlock\r
+ ));\r
+ if ((NumOfLba == 0) || ((Instance->StartLba + StartingLba + NumOfLba - 1) > Instance->Media.LastBlock)) {\r
+ VA_END (Args);\r
+ DEBUG ((EFI_D_ERROR, "FvbEraseBlocks: ERROR - Lba range goes past the last Lba.\n"));\r
+ Status = EFI_INVALID_PARAMETER;\r
+ goto EXIT;\r
+ }\r
+ } while (TRUE);\r
+ VA_END (Args);\r
+\r
+ //\r
+ // To get here, all must be ok, so start erasing\r
+ //\r
+ VA_START (Args, This);\r
+ do {\r
+ // Get the Lba from which we start erasing\r
+ StartingLba = VA_ARG (Args, EFI_LBA);\r
+\r
+ // Have we reached the end of the list?\r
+ if (StartingLba == EFI_LBA_LIST_TERMINATOR) {\r
+ // Exit the while loop\r
+ break;\r
+ }\r
+\r
+ // How many Lba blocks are we requested to erase?\r
+ NumOfLba = VA_ARG (Args, UINTN);\r
+\r
+ // Go through each one and erase it\r
+ while (NumOfLba > 0) {\r
+\r
+ // Get the physical address of Lba to erase\r
+ BlockAddress = GET_NOR_BLOCK_ADDRESS (\r
+ Instance->RegionBaseAddress,\r
+ Instance->StartLba + StartingLba,\r
+ Instance->Media.BlockSize\r
+ );\r
+\r
+ // Erase it\r
+ DEBUG ((DEBUG_BLKIO, "FvbEraseBlocks: Erasing Lba=%ld @ 0x%08x.\n", Instance->StartLba + StartingLba, BlockAddress));\r
+ Status = NorFlashUnlockAndEraseSingleBlock (Instance, BlockAddress);\r
+ if (EFI_ERROR(Status)) {\r
+ VA_END (Args);\r
+ Status = EFI_DEVICE_ERROR;\r
+ goto EXIT;\r
+ }\r
+\r
+ // Move to the next Lba\r
+ StartingLba++;\r
+ NumOfLba--;\r
+ }\r
+ } while (TRUE);\r
+ VA_END (Args);\r
+\r
+EXIT:\r
+ return Status;\r
+}\r
+\r
+/**\r
+ Fixup internal data so that EFI can be call in virtual mode.\r
+ Call the passed in Child Notify event and convert any pointers in\r
+ lib to virtual mode.\r
+\r
+ @param[in] Event The Event that is being processed\r
+ @param[in] Context Event Context\r
+**/\r
+VOID\r
+EFIAPI\r
+FvbVirtualNotifyEvent (\r
+ IN EFI_EVENT Event,\r
+ IN VOID *Context\r
+ )\r
+{\r
+ EfiConvertPointer (0x0, (VOID**)&mFlashNvStorageVariableBase);\r
+ return;\r
+}\r
+\r
+EFI_STATUS\r
+EFIAPI\r
+NorFlashFvbInitialize (\r
+ IN NOR_FLASH_INSTANCE* Instance\r
+ )\r
+{\r
+ EFI_STATUS Status;\r
+ UINT32 FvbNumLba;\r
+ EFI_BOOT_MODE BootMode;\r
+ UINTN RuntimeMmioRegionSize;\r
+\r
+ DEBUG((DEBUG_BLKIO,"NorFlashFvbInitialize\n"));\r
+ ASSERT((Instance != NULL));\r
+\r
+ //\r
+ // Declare the Non-Volatile storage as EFI_MEMORY_RUNTIME\r
+ //\r
+\r
+ // Note: all the NOR Flash region needs to be reserved into the UEFI Runtime memory;\r
+ // even if we only use the small block region at the top of the NOR Flash.\r
+ // The reason is when the NOR Flash memory is set into program mode, the command\r
+ // is written as the base of the flash region (ie: Instance->DeviceBaseAddress)\r
+ RuntimeMmioRegionSize = (Instance->RegionBaseAddress - Instance->DeviceBaseAddress) + Instance->Size;\r
+\r
+ Status = gDS->AddMemorySpace (\r
+ EfiGcdMemoryTypeMemoryMappedIo,\r
+ Instance->DeviceBaseAddress, RuntimeMmioRegionSize,\r
+ EFI_MEMORY_UC | EFI_MEMORY_RUNTIME\r
+ );\r
+ ASSERT_EFI_ERROR (Status);\r
+\r
+ Status = gDS->SetMemorySpaceAttributes (\r
+ Instance->DeviceBaseAddress, RuntimeMmioRegionSize,\r
+ EFI_MEMORY_UC | EFI_MEMORY_RUNTIME);\r
+ ASSERT_EFI_ERROR (Status);\r
+\r
+ mFlashNvStorageVariableBase = FixedPcdGet32 (PcdFlashNvStorageVariableBase);\r
+\r
+ // Set the index of the first LBA for the FVB\r
+ Instance->StartLba = (PcdGet32 (PcdFlashNvStorageVariableBase) - Instance->RegionBaseAddress) / Instance->Media.BlockSize;\r
+\r
+ BootMode = GetBootModeHob ();\r
+ if (BootMode == BOOT_WITH_DEFAULT_SETTINGS) {\r
+ Status = EFI_INVALID_PARAMETER;\r
+ } else {\r
+ // Determine if there is a valid header at the beginning of the NorFlash\r
+ Status = ValidateFvHeader (Instance);\r
+ }\r
+\r
+ // Install the Default FVB header if required\r
+ if (EFI_ERROR(Status)) {\r
+ // There is no valid header, so time to install one.\r
+ DEBUG ((EFI_D_INFO, "%a: The FVB Header is not valid.\n", __FUNCTION__));\r
+ DEBUG ((EFI_D_INFO, "%a: Installing a correct one for this volume.\n",\r
+ __FUNCTION__));\r
+\r
+ // Erase all the NorFlash that is reserved for variable storage\r
+ FvbNumLba = (PcdGet32(PcdFlashNvStorageVariableSize) + PcdGet32(PcdFlashNvStorageFtwWorkingSize) + PcdGet32(PcdFlashNvStorageFtwSpareSize)) / Instance->Media.BlockSize;\r
+\r
+ Status = FvbEraseBlocks (&Instance->FvbProtocol, (EFI_LBA)0, FvbNumLba, EFI_LBA_LIST_TERMINATOR);\r
+ if (EFI_ERROR(Status)) {\r
+ return Status;\r
+ }\r
+\r
+ // Install all appropriate headers\r
+ Status = InitializeFvAndVariableStoreHeaders (Instance);\r
+ if (EFI_ERROR(Status)) {\r
+ return Status;\r
+ }\r
+ }\r
+\r
+ //\r
+ // Register for the virtual address change event\r
+ //\r
+ Status = gBS->CreateEventEx (\r
+ EVT_NOTIFY_SIGNAL,\r
+ TPL_NOTIFY,\r
+ FvbVirtualNotifyEvent,\r
+ NULL,\r
+ &gEfiEventVirtualAddressChangeGuid,\r
+ &mFvbVirtualAddrChangeEvent\r
+ );\r
+ ASSERT_EFI_ERROR (Status);\r
+\r
+ return Status;\r
+}\r
projects / mirror_edk2.git / blobdiff