X-Git-Url: https://git.proxmox.com/?p=mirror_edk2.git;a=blobdiff_plain;f=ArmPlatformPkg%2FDrivers%2FNorFlashDxe%2FNorFlashFvbDxe.c;fp=ArmPlatformPkg%2FDrivers%2FNorFlashDxe%2FNorFlashFvbDxe.c;h=0c138a5ab2e7cb15203ed706ea9cbec7de4d11c6;hp=29de964829042a9370de929e6fa39650fa6b0931;hb=1e57a46299244793beb27e74be171d1540606999;hpb=5767f22fca7c337cdc113e14b411c1fd0ea7bd53
diff --git a/ArmPlatformPkg/Drivers/NorFlashDxe/NorFlashFvbDxe.c b/ArmPlatformPkg/Drivers/NorFlashDxe/NorFlashFvbDxe.c
index 29de964829..0c138a5ab2 100644
--- a/ArmPlatformPkg/Drivers/NorFlashDxe/NorFlashFvbDxe.c
+++ b/ArmPlatformPkg/Drivers/NorFlashDxe/NorFlashFvbDxe.c
@@ -1,812 +1,812 @@
-/*++ @file NorFlashFvbDxe.c
-
- Copyright (c) 2011-2012, ARM Ltd. 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.
-
- --*/
-
-#include
-
-#include
-#include
-#include
-#include
-#include
-#include
-#include
-
-#include
-#include
-
-#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
+
+ Copyright (c) 2011-2012, ARM Ltd. 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.
+
+ --*/
+
+#include
+
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+
+#include
+#include
+
+#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;
+}