diff options
Diffstat (limited to 'OvmfPkg/VirtNorFlashDxe')
| -rw-r--r-- | OvmfPkg/VirtNorFlashDxe/VirtNorFlash.c | 991 | ||||
| -rw-r--r-- | OvmfPkg/VirtNorFlashDxe/VirtNorFlash.h | 422 | ||||
| -rw-r--r-- | OvmfPkg/VirtNorFlashDxe/VirtNorFlashBlockIoDxe.c | 123 | ||||
| -rw-r--r-- | OvmfPkg/VirtNorFlashDxe/VirtNorFlashDxe.c | 506 | ||||
| -rw-r--r-- | OvmfPkg/VirtNorFlashDxe/VirtNorFlashDxe.inf | 72 | ||||
| -rw-r--r-- | OvmfPkg/VirtNorFlashDxe/VirtNorFlashFvb.c | 777 |
6 files changed, 2891 insertions, 0 deletions
diff --git a/OvmfPkg/VirtNorFlashDxe/VirtNorFlash.c b/OvmfPkg/VirtNorFlashDxe/VirtNorFlash.c new file mode 100644 index 0000000000..12fa720dad --- /dev/null +++ b/OvmfPkg/VirtNorFlashDxe/VirtNorFlash.c @@ -0,0 +1,991 @@ +/** @file NorFlash.c
+
+ Copyright (c) 2011 - 2020, Arm Limited. All rights reserved.<BR>
+ Copyright (c) 2020, Linaro, Ltd. All rights reserved.<BR>
+
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#include <Library/BaseMemoryLib.h>
+
+#include "VirtNorFlash.h"
+
+//
+// Global variable declarations
+//
+extern NOR_FLASH_INSTANCE **mNorFlashInstances;
+extern UINT32 mNorFlashDeviceCount;
+
+UINT32
+NorFlashReadStatusRegister (
+ IN NOR_FLASH_INSTANCE *Instance,
+ IN UINTN SR_Address
+ )
+{
+ // Prepare to read the status register
+ SEND_NOR_COMMAND (Instance->DeviceBaseAddress, 0, P30_CMD_READ_STATUS_REGISTER);
+ return MmioRead32 (Instance->DeviceBaseAddress);
+}
+
+STATIC
+BOOLEAN
+NorFlashBlockIsLocked (
+ IN NOR_FLASH_INSTANCE *Instance,
+ IN UINTN BlockAddress
+ )
+{
+ UINT32 LockStatus;
+
+ // Send command for reading device id
+ SEND_NOR_COMMAND (BlockAddress, 2, P30_CMD_READ_DEVICE_ID);
+
+ // Read block lock status
+ LockStatus = MmioRead32 (CREATE_NOR_ADDRESS (BlockAddress, 2));
+
+ // Decode block lock status
+ LockStatus = FOLD_32BIT_INTO_16BIT (LockStatus);
+
+ if ((LockStatus & 0x2) != 0) {
+ DEBUG ((DEBUG_ERROR, "NorFlashBlockIsLocked: WARNING: Block LOCKED DOWN\n"));
+ }
+
+ return ((LockStatus & 0x1) != 0);
+}
+
+STATIC
+EFI_STATUS
+NorFlashUnlockSingleBlock (
+ IN NOR_FLASH_INSTANCE *Instance,
+ IN UINTN BlockAddress
+ )
+{
+ UINT32 LockStatus;
+
+ // Raise the Task Priority Level to TPL_NOTIFY to serialise all its operations
+ // and to protect shared data structures.
+
+ if (FeaturePcdGet (PcdNorFlashCheckBlockLocked) == TRUE) {
+ do {
+ // Request a lock setup
+ SEND_NOR_COMMAND (BlockAddress, 0, P30_CMD_LOCK_BLOCK_SETUP);
+
+ // Request an unlock
+ SEND_NOR_COMMAND (BlockAddress, 0, P30_CMD_UNLOCK_BLOCK);
+
+ // Send command for reading device id
+ SEND_NOR_COMMAND (BlockAddress, 2, P30_CMD_READ_DEVICE_ID);
+
+ // Read block lock status
+ LockStatus = MmioRead32 (CREATE_NOR_ADDRESS (BlockAddress, 2));
+
+ // Decode block lock status
+ LockStatus = FOLD_32BIT_INTO_16BIT (LockStatus);
+ } while ((LockStatus & 0x1) == 1);
+ } else {
+ // Request a lock setup
+ SEND_NOR_COMMAND (BlockAddress, 0, P30_CMD_LOCK_BLOCK_SETUP);
+
+ // Request an unlock
+ SEND_NOR_COMMAND (BlockAddress, 0, P30_CMD_UNLOCK_BLOCK);
+
+ // Wait until the status register gives us the all clear
+ do {
+ LockStatus = NorFlashReadStatusRegister (Instance, BlockAddress);
+ } while ((LockStatus & P30_SR_BIT_WRITE) != P30_SR_BIT_WRITE);
+ }
+
+ // Put device back into Read Array mode
+ SEND_NOR_COMMAND (BlockAddress, 0, P30_CMD_READ_ARRAY);
+
+ DEBUG ((DEBUG_BLKIO, "UnlockSingleBlock: BlockAddress=0x%08x\n", BlockAddress));
+
+ return EFI_SUCCESS;
+}
+
+EFI_STATUS
+NorFlashUnlockSingleBlockIfNecessary (
+ IN NOR_FLASH_INSTANCE *Instance,
+ IN UINTN BlockAddress
+ )
+{
+ EFI_STATUS Status;
+
+ Status = EFI_SUCCESS;
+
+ if (NorFlashBlockIsLocked (Instance, BlockAddress)) {
+ Status = NorFlashUnlockSingleBlock (Instance, BlockAddress);
+ }
+
+ return Status;
+}
+
+/**
+ * The following function presumes that the block has already been unlocked.
+ **/
+EFI_STATUS
+NorFlashEraseSingleBlock (
+ IN NOR_FLASH_INSTANCE *Instance,
+ IN UINTN BlockAddress
+ )
+{
+ EFI_STATUS Status;
+ UINT32 StatusRegister;
+
+ Status = EFI_SUCCESS;
+
+ // Request a block erase and then confirm it
+ SEND_NOR_COMMAND (BlockAddress, 0, P30_CMD_BLOCK_ERASE_SETUP);
+ SEND_NOR_COMMAND (BlockAddress, 0, P30_CMD_BLOCK_ERASE_CONFIRM);
+
+ // Wait until the status register gives us the all clear
+ do {
+ StatusRegister = NorFlashReadStatusRegister (Instance, BlockAddress);
+ } while ((StatusRegister & P30_SR_BIT_WRITE) != P30_SR_BIT_WRITE);
+
+ if (StatusRegister & P30_SR_BIT_VPP) {
+ DEBUG ((DEBUG_ERROR, "EraseSingleBlock(BlockAddress=0x%08x: VPP Range Error\n", BlockAddress));
+ Status = EFI_DEVICE_ERROR;
+ }
+
+ if ((StatusRegister & (P30_SR_BIT_ERASE | P30_SR_BIT_PROGRAM)) == (P30_SR_BIT_ERASE | P30_SR_BIT_PROGRAM)) {
+ DEBUG ((DEBUG_ERROR, "EraseSingleBlock(BlockAddress=0x%08x: Command Sequence Error\n", BlockAddress));
+ Status = EFI_DEVICE_ERROR;
+ }
+
+ if (StatusRegister & P30_SR_BIT_ERASE) {
+ DEBUG ((DEBUG_ERROR, "EraseSingleBlock(BlockAddress=0x%08x: Block Erase Error StatusRegister:0x%X\n", BlockAddress, StatusRegister));
+ Status = EFI_DEVICE_ERROR;
+ }
+
+ if (StatusRegister & P30_SR_BIT_BLOCK_LOCKED) {
+ // The debug level message has been reduced because a device lock might happen. In this case we just retry it ...
+ DEBUG ((DEBUG_INFO, "EraseSingleBlock(BlockAddress=0x%08x: Block Locked Error\n", BlockAddress));
+ Status = EFI_WRITE_PROTECTED;
+ }
+
+ if (EFI_ERROR (Status)) {
+ // Clear the Status Register
+ SEND_NOR_COMMAND (Instance->DeviceBaseAddress, 0, P30_CMD_CLEAR_STATUS_REGISTER);
+ }
+
+ // Put device back into Read Array mode
+ SEND_NOR_COMMAND (Instance->DeviceBaseAddress, 0, P30_CMD_READ_ARRAY);
+
+ return Status;
+}
+
+EFI_STATUS
+NorFlashWriteSingleWord (
+ IN NOR_FLASH_INSTANCE *Instance,
+ IN UINTN WordAddress,
+ IN UINT32 WriteData
+ )
+{
+ EFI_STATUS Status;
+ UINT32 StatusRegister;
+
+ Status = EFI_SUCCESS;
+
+ // Request a write single word command
+ SEND_NOR_COMMAND (WordAddress, 0, P30_CMD_WORD_PROGRAM_SETUP);
+
+ // Store the word into NOR Flash;
+ MmioWrite32 (WordAddress, WriteData);
+
+ // Wait for the write to complete and then check for any errors; i.e. check the Status Register
+ do {
+ // Prepare to read the status register
+ StatusRegister = NorFlashReadStatusRegister (Instance, WordAddress);
+ // The chip is busy while the WRITE bit is not asserted
+ } while ((StatusRegister & P30_SR_BIT_WRITE) != P30_SR_BIT_WRITE);
+
+ // Perform a full status check:
+ // Mask the relevant bits of Status Register.
+ // Everything should be zero, if not, we have a problem
+
+ if (StatusRegister & P30_SR_BIT_VPP) {
+ DEBUG ((DEBUG_ERROR, "NorFlashWriteSingleWord(WordAddress:0x%X): VPP Range Error\n", WordAddress));
+ Status = EFI_DEVICE_ERROR;
+ }
+
+ if (StatusRegister & P30_SR_BIT_PROGRAM) {
+ DEBUG ((DEBUG_ERROR, "NorFlashWriteSingleWord(WordAddress:0x%X): Program Error\n", WordAddress));
+ Status = EFI_DEVICE_ERROR;
+ }
+
+ if (StatusRegister & P30_SR_BIT_BLOCK_LOCKED) {
+ DEBUG ((DEBUG_ERROR, "NorFlashWriteSingleWord(WordAddress:0x%X): Device Protect Error\n", WordAddress));
+ Status = EFI_DEVICE_ERROR;
+ }
+
+ if (!EFI_ERROR (Status)) {
+ // Clear the Status Register
+ SEND_NOR_COMMAND (Instance->DeviceBaseAddress, 0, P30_CMD_CLEAR_STATUS_REGISTER);
+ }
+
+ // Put device back into Read Array mode
+ SEND_NOR_COMMAND (Instance->DeviceBaseAddress, 0, P30_CMD_READ_ARRAY);
+
+ return Status;
+}
+
+/*
+ * Writes data to the NOR Flash using the Buffered Programming method.
+ *
+ * The maximum size of the on-chip buffer is 32-words, because of hardware restrictions.
+ * Therefore this function will only handle buffers up to 32 words or 128 bytes.
+ * To deal with larger buffers, call this function again.
+ *
+ * This function presumes that both the TargetAddress and the TargetAddress+BufferSize
+ * exist entirely within the NOR Flash. Therefore these conditions will not be checked here.
+ *
+ * In buffered programming, if the target address not at the beginning of a 32-bit word boundary,
+ * then programming time is doubled and power consumption is increased.
+ * Therefore, it is a requirement to align buffer writes to 32-bit word boundaries.
+ * i.e. the last 4 bits of the target start address must be zero: 0x......00
+ */
+EFI_STATUS
+NorFlashWriteBuffer (
+ IN NOR_FLASH_INSTANCE *Instance,
+ IN UINTN TargetAddress,
+ IN UINTN BufferSizeInBytes,
+ IN UINT32 *Buffer
+ )
+{
+ EFI_STATUS Status;
+ UINTN BufferSizeInWords;
+ UINTN Count;
+ volatile UINT32 *Data;
+ UINTN WaitForBuffer;
+ BOOLEAN BufferAvailable;
+ UINT32 StatusRegister;
+
+ WaitForBuffer = MAX_BUFFERED_PROG_ITERATIONS;
+ BufferAvailable = FALSE;
+
+ // Check that the target address does not cross a 32-word boundary.
+ if ((TargetAddress & BOUNDARY_OF_32_WORDS) != 0) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ // Check there are some data to program
+ if (BufferSizeInBytes == 0) {
+ return EFI_BUFFER_TOO_SMALL;
+ }
+
+ // Check that the buffer size does not exceed the maximum hardware buffer size on chip.
+ if (BufferSizeInBytes > P30_MAX_BUFFER_SIZE_IN_BYTES) {
+ return EFI_BAD_BUFFER_SIZE;
+ }
+
+ // Check that the buffer size is a multiple of 32-bit words
+ if ((BufferSizeInBytes % 4) != 0) {
+ return EFI_BAD_BUFFER_SIZE;
+ }
+
+ // Pre-programming conditions checked, now start the algorithm.
+
+ // Prepare the data destination address
+ Data = (UINT32 *)TargetAddress;
+
+ // Check the availability of the buffer
+ do {
+ // Issue the Buffered Program Setup command
+ SEND_NOR_COMMAND (TargetAddress, 0, P30_CMD_BUFFERED_PROGRAM_SETUP);
+
+ // Read back the status register bit#7 from the same address
+ if (((*Data) & P30_SR_BIT_WRITE) == P30_SR_BIT_WRITE) {
+ BufferAvailable = TRUE;
+ }
+
+ // Update the loop counter
+ WaitForBuffer--;
+ } while ((WaitForBuffer > 0) && (BufferAvailable == FALSE));
+
+ // The buffer was not available for writing
+ if (WaitForBuffer == 0) {
+ Status = EFI_DEVICE_ERROR;
+ goto EXIT;
+ }
+
+ // From now on we work in 32-bit words
+ BufferSizeInWords = BufferSizeInBytes / (UINTN)4;
+
+ // Write the word count, which is (buffer_size_in_words - 1),
+ // because word count 0 means one word.
+ SEND_NOR_COMMAND (TargetAddress, 0, (BufferSizeInWords - 1));
+
+ // Write the data to the NOR Flash, advancing each address by 4 bytes
+ for (Count = 0; Count < BufferSizeInWords; Count++, Data++, Buffer++) {
+ MmioWrite32 ((UINTN)Data, *Buffer);
+ }
+
+ // Issue the Buffered Program Confirm command, to start the programming operation
+ SEND_NOR_COMMAND (Instance->DeviceBaseAddress, 0, P30_CMD_BUFFERED_PROGRAM_CONFIRM);
+
+ // Wait for the write to complete and then check for any errors; i.e. check the Status Register
+ do {
+ StatusRegister = NorFlashReadStatusRegister (Instance, TargetAddress);
+ // The chip is busy while the WRITE bit is not asserted
+ } while ((StatusRegister & P30_SR_BIT_WRITE) != P30_SR_BIT_WRITE);
+
+ // Perform a full status check:
+ // Mask the relevant bits of Status Register.
+ // Everything should be zero, if not, we have a problem
+
+ Status = EFI_SUCCESS;
+
+ if (StatusRegister & P30_SR_BIT_VPP) {
+ DEBUG ((DEBUG_ERROR, "NorFlashWriteBuffer(TargetAddress:0x%X): VPP Range Error\n", TargetAddress));
+ Status = EFI_DEVICE_ERROR;
+ }
+
+ if (StatusRegister & P30_SR_BIT_PROGRAM) {
+ DEBUG ((DEBUG_ERROR, "NorFlashWriteBuffer(TargetAddress:0x%X): Program Error\n", TargetAddress));
+ Status = EFI_DEVICE_ERROR;
+ }
+
+ if (StatusRegister & P30_SR_BIT_BLOCK_LOCKED) {
+ DEBUG ((DEBUG_ERROR, "NorFlashWriteBuffer(TargetAddress:0x%X): Device Protect Error\n", TargetAddress));
+ Status = EFI_DEVICE_ERROR;
+ }
+
+ if (!EFI_ERROR (Status)) {
+ // Clear the Status Register
+ SEND_NOR_COMMAND (Instance->DeviceBaseAddress, 0, P30_CMD_CLEAR_STATUS_REGISTER);
+ }
+
+EXIT:
+ // Put device back into Read Array mode
+ SEND_NOR_COMMAND (Instance->DeviceBaseAddress, 0, P30_CMD_READ_ARRAY);
+
+ return Status;
+}
+
+EFI_STATUS
+NorFlashWriteBlocks (
+ IN NOR_FLASH_INSTANCE *Instance,
+ IN EFI_LBA Lba,
+ IN UINTN BufferSizeInBytes,
+ IN VOID *Buffer
+ )
+{
+ UINT32 *pWriteBuffer;
+ EFI_STATUS Status;
+ EFI_LBA CurrentBlock;
+ UINT32 BlockSizeInWords;
+ UINT32 NumBlocks;
+ UINT32 BlockCount;
+
+ Status = EFI_SUCCESS;
+
+ // The buffer must be valid
+ if (Buffer == NULL) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ if (Instance->Media.ReadOnly == TRUE) {
+ return EFI_WRITE_PROTECTED;
+ }
+
+ // We must have some bytes to read
+ DEBUG ((DEBUG_BLKIO, "NorFlashWriteBlocks: BufferSizeInBytes=0x%x\n", BufferSizeInBytes));
+ if (BufferSizeInBytes == 0) {
+ return EFI_BAD_BUFFER_SIZE;
+ }
+
+ // The size of the buffer must be a multiple of the block size
+ DEBUG ((DEBUG_BLKIO, "NorFlashWriteBlocks: BlockSize in bytes =0x%x\n", Instance->Media.BlockSize));
+ if ((BufferSizeInBytes % Instance->Media.BlockSize) != 0) {
+ return EFI_BAD_BUFFER_SIZE;
+ }
+
+ // All blocks must be within the device
+ NumBlocks = ((UINT32)BufferSizeInBytes) / Instance->Media.BlockSize;
+
+ DEBUG ((DEBUG_BLKIO, "NorFlashWriteBlocks: NumBlocks=%d, LastBlock=%ld, Lba=%ld.\n", NumBlocks, Instance->Media.LastBlock, Lba));
+
+ if ((Lba + NumBlocks) > (Instance->Media.LastBlock + 1)) {
+ DEBUG ((DEBUG_ERROR, "NorFlashWriteBlocks: ERROR - Write will exceed last block.\n"));
+ return EFI_INVALID_PARAMETER;
+ }
+
+ BlockSizeInWords = Instance->Media.BlockSize / 4;
+
+ // Because the target *Buffer is a pointer to VOID, we must put all the data into a pointer
+ // to a proper data type, so use *ReadBuffer
+ pWriteBuffer = (UINT32 *)Buffer;
+
+ CurrentBlock = Lba;
+ for (BlockCount = 0; BlockCount < NumBlocks; BlockCount++, CurrentBlock++, pWriteBuffer = pWriteBuffer + BlockSizeInWords) {
+ DEBUG ((DEBUG_BLKIO, "NorFlashWriteBlocks: Writing block #%d\n", (UINTN)CurrentBlock));
+
+ Status = NorFlashWriteFullBlock (Instance, CurrentBlock, pWriteBuffer, BlockSizeInWords);
+
+ if (EFI_ERROR (Status)) {
+ break;
+ }
+ }
+
+ DEBUG ((DEBUG_BLKIO, "NorFlashWriteBlocks: Exit Status = \"%r\".\n", Status));
+ return Status;
+}
+
+#define BOTH_ALIGNED(a, b, align) ((((UINTN)(a) | (UINTN)(b)) & ((align) - 1)) == 0)
+
+/**
+ Copy Length bytes from Source to Destination, using aligned accesses only.
+ Note that this implementation uses memcpy() semantics rather then memmove()
+ semantics, i.e., SourceBuffer and DestinationBuffer should not overlap.
+
+ @param DestinationBuffer The target of the copy request.
+ @param SourceBuffer The place to copy from.
+ @param Length The number of bytes to copy.
+
+ @return Destination
+
+**/
+STATIC
+VOID *
+AlignedCopyMem (
+ OUT VOID *DestinationBuffer,
+ IN CONST VOID *SourceBuffer,
+ IN UINTN Length
+ )
+{
+ UINT8 *Destination8;
+ CONST UINT8 *Source8;
+ UINT32 *Destination32;
+ CONST UINT32 *Source32;
+ UINT64 *Destination64;
+ CONST UINT64 *Source64;
+
+ if (BOTH_ALIGNED (DestinationBuffer, SourceBuffer, 8) && (Length >= 8)) {
+ Destination64 = DestinationBuffer;
+ Source64 = SourceBuffer;
+ while (Length >= 8) {
+ *Destination64++ = *Source64++;
+ Length -= 8;
+ }
+
+ Destination8 = (UINT8 *)Destination64;
+ Source8 = (CONST UINT8 *)Source64;
+ } else if (BOTH_ALIGNED (DestinationBuffer, SourceBuffer, 4) && (Length >= 4)) {
+ Destination32 = DestinationBuffer;
+ Source32 = SourceBuffer;
+ while (Length >= 4) {
+ *Destination32++ = *Source32++;
+ Length -= 4;
+ }
+
+ Destination8 = (UINT8 *)Destination32;
+ Source8 = (CONST UINT8 *)Source32;
+ } else {
+ Destination8 = DestinationBuffer;
+ Source8 = SourceBuffer;
+ }
+
+ while (Length-- != 0) {
+ *Destination8++ = *Source8++;
+ }
+
+ return DestinationBuffer;
+}
+
+EFI_STATUS
+NorFlashReadBlocks (
+ IN NOR_FLASH_INSTANCE *Instance,
+ IN EFI_LBA Lba,
+ IN UINTN BufferSizeInBytes,
+ OUT VOID *Buffer
+ )
+{
+ UINT32 NumBlocks;
+ UINTN StartAddress;
+
+ DEBUG ((
+ DEBUG_BLKIO,
+ "NorFlashReadBlocks: BufferSize=0x%xB BlockSize=0x%xB LastBlock=%ld, Lba=%ld.\n",
+ BufferSizeInBytes,
+ Instance->Media.BlockSize,
+ Instance->Media.LastBlock,
+ Lba
+ ));
+
+ // The buffer must be valid
+ if (Buffer == NULL) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ // Return if we have not any byte to read
+ if (BufferSizeInBytes == 0) {
+ return EFI_SUCCESS;
+ }
+
+ // The size of the buffer must be a multiple of the block size
+ if ((BufferSizeInBytes % Instance->Media.BlockSize) != 0) {
+ return EFI_BAD_BUFFER_SIZE;
+ }
+
+ // All blocks must be within the device
+ NumBlocks = ((UINT32)BufferSizeInBytes) / Instance->Media.BlockSize;
+
+ if ((Lba + NumBlocks) > (Instance->Media.LastBlock + 1)) {
+ DEBUG ((DEBUG_ERROR, "NorFlashReadBlocks: ERROR - Read will exceed last block\n"));
+ return EFI_INVALID_PARAMETER;
+ }
+
+ // Get the address to start reading from
+ StartAddress = GET_NOR_BLOCK_ADDRESS (
+ Instance->RegionBaseAddress,
+ Lba,
+ Instance->Media.BlockSize
+ );
+
+ // Put the device into Read Array mode
+ SEND_NOR_COMMAND (Instance->DeviceBaseAddress, 0, P30_CMD_READ_ARRAY);
+
+ // Readout the data
+ AlignedCopyMem (Buffer, (VOID *)StartAddress, BufferSizeInBytes);
+
+ return EFI_SUCCESS;
+}
+
+EFI_STATUS
+NorFlashRead (
+ IN NOR_FLASH_INSTANCE *Instance,
+ IN EFI_LBA Lba,
+ IN UINTN Offset,
+ IN UINTN BufferSizeInBytes,
+ OUT VOID *Buffer
+ )
+{
+ UINTN StartAddress;
+
+ // The buffer must be valid
+ if (Buffer == NULL) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ // Return if we have not any byte to read
+ if (BufferSizeInBytes == 0) {
+ return EFI_SUCCESS;
+ }
+
+ if (((Lba * Instance->Media.BlockSize) + Offset + BufferSizeInBytes) > Instance->Size) {
+ DEBUG ((DEBUG_ERROR, "NorFlashRead: ERROR - Read will exceed device size.\n"));
+ return EFI_INVALID_PARAMETER;
+ }
+
+ // Get the address to start reading from
+ StartAddress = GET_NOR_BLOCK_ADDRESS (
+ Instance->RegionBaseAddress,
+ Lba,
+ Instance->Media.BlockSize
+ );
+
+ // Put the device into Read Array mode
+ SEND_NOR_COMMAND (Instance->DeviceBaseAddress, 0, P30_CMD_READ_ARRAY);
+
+ // Readout the data
+ AlignedCopyMem (Buffer, (VOID *)(StartAddress + Offset), BufferSizeInBytes);
+
+ return EFI_SUCCESS;
+}
+
+/*
+ Write a full or portion of a block. It must not span block boundaries; that is,
+ Offset + *NumBytes <= Instance->Media.BlockSize.
+*/
+EFI_STATUS
+NorFlashWriteSingleBlock (
+ IN NOR_FLASH_INSTANCE *Instance,
+ IN EFI_LBA Lba,
+ IN UINTN Offset,
+ IN OUT UINTN *NumBytes,
+ IN UINT8 *Buffer
+ )
+{
+ EFI_STATUS TempStatus;
+ UINT32 Tmp;
+ UINT32 TmpBuf;
+ UINT32 WordToWrite;
+ UINT32 Mask;
+ BOOLEAN DoErase;
+ UINTN BytesToWrite;
+ UINTN CurOffset;
+ UINTN WordAddr;
+ UINTN BlockSize;
+ UINTN BlockAddress;
+ UINTN PrevBlockAddress;
+
+ PrevBlockAddress = 0;
+
+ DEBUG ((DEBUG_BLKIO, "NorFlashWriteSingleBlock(Parameters: Lba=%ld, Offset=0x%x, *NumBytes=0x%x, Buffer @ 0x%08x)\n", Lba, Offset, *NumBytes, Buffer));
+
+ // Detect WriteDisabled state
+ if (Instance->Media.ReadOnly == TRUE) {
+ DEBUG ((DEBUG_ERROR, "NorFlashWriteSingleBlock: 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 ((DEBUG_ERROR, "NorFlashWriteSingleBlock: 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 ((DEBUG_ERROR, "NorFlashWriteSingleBlock: ERROR - EFI_BAD_BUFFER_SIZE: (Offset=0x%x + NumBytes=0x%x) > BlockSize=0x%x\n", Offset, *NumBytes, BlockSize));
+ return EFI_BAD_BUFFER_SIZE;
+ }
+
+ // Pick 128bytes as a good start for word operations as opposed to erasing the
+ // block and writing the data regardless if an erase is really needed.
+ // It looks like most individual NV variable writes are smaller than 128bytes.
+ if (*NumBytes <= 128) {
+ // Check to see if we need to erase before programming the data into NOR.
+ // If the destination bits are only changing from 1s to 0s we can just write.
+ // After a block is erased all bits in the block is set to 1.
+ // If any byte requires us to erase we just give up and rewrite all of it.
+ DoErase = FALSE;
+ BytesToWrite = *NumBytes;
+ CurOffset = Offset;
+
+ while (BytesToWrite > 0) {
+ // Read full word from NOR, splice as required. A word is the smallest
+ // unit we can write.
+ TempStatus = NorFlashRead (Instance, Lba, CurOffset & ~(0x3), sizeof (Tmp), &Tmp);
+ if (EFI_ERROR (TempStatus)) {
+ return EFI_DEVICE_ERROR;
+ }
+
+ // Physical address of word in NOR to write.
+ WordAddr = (CurOffset & ~(0x3)) + GET_NOR_BLOCK_ADDRESS (
+ Instance->RegionBaseAddress,
+ Lba,
+ BlockSize
+ );
+ // The word of data that is to be written.
+ TmpBuf = *((UINT32 *)(Buffer + (*NumBytes - BytesToWrite)));
+
+ // First do word aligned chunks.
+ if ((CurOffset & 0x3) == 0) {
+ if (BytesToWrite >= 4) {
+ // Is the destination still in 'erased' state?
+ if (~Tmp != 0) {
+ // Check to see if we are only changing bits to zero.
+ if ((Tmp ^ TmpBuf) & TmpBuf) {
+ DoErase = TRUE;
+ break;
+ }
+ }
+
+ // Write this word to NOR
+ WordToWrite = TmpBuf;
+ CurOffset += sizeof (TmpBuf);
+ BytesToWrite -= sizeof (TmpBuf);
+ } else {
+ // BytesToWrite < 4. Do small writes and left-overs
+ Mask = ~((~0) << (BytesToWrite * 8));
+ // Mask out the bytes we want.
+ TmpBuf &= Mask;
+ // Is the destination still in 'erased' state?
+ if ((Tmp & Mask) != Mask) {
+ // Check to see if we are only changing bits to zero.
+ if ((Tmp ^ TmpBuf) & TmpBuf) {
+ DoErase = TRUE;
+ break;
+ }
+ }
+
+ // Merge old and new data. Write merged word to NOR
+ WordToWrite = (Tmp & ~Mask) | TmpBuf;
+ CurOffset += BytesToWrite;
+ BytesToWrite = 0;
+ }
+ } else {
+ // Do multiple words, but starting unaligned.
+ if (BytesToWrite > (4 - (CurOffset & 0x3))) {
+ Mask = ((~0) << ((CurOffset & 0x3) * 8));
+ // Mask out the bytes we want.
+ TmpBuf &= Mask;
+ // Is the destination still in 'erased' state?
+ if ((Tmp & Mask) != Mask) {
+ // Check to see if we are only changing bits to zero.
+ if ((Tmp ^ TmpBuf) & TmpBuf) {
+ DoErase = TRUE;
+ break;
+ }
+ }
+
+ // Merge old and new data. Write merged word to NOR
+ WordToWrite = (Tmp & ~Mask) | TmpBuf;
+ BytesToWrite -= (4 - (CurOffset & 0x3));
+ CurOffset += (4 - (CurOffset & 0x3));
+ } else {
+ // Unaligned and fits in one word.
+ Mask = (~((~0) << (BytesToWrite * 8))) << ((CurOffset & 0x3) * 8);
+ // Mask out the bytes we want.
+ TmpBuf = (TmpBuf << ((CurOffset & 0x3) * 8)) & Mask;
+ // Is the destination still in 'erased' state?
+ if ((Tmp & Mask) != Mask) {
+ // Check to see if we are only changing bits to zero.
+ if ((Tmp ^ TmpBuf) & TmpBuf) {
+ DoErase = TRUE;
+ break;
+ }
+ }
+
+ // Merge old and new data. Write merged word to NOR
+ WordToWrite = (Tmp & ~Mask) | TmpBuf;
+ CurOffset += BytesToWrite;
+ BytesToWrite = 0;
+ }
+ }
+
+ //
+ // Write the word to NOR.
+ //
+
+ BlockAddress = GET_NOR_BLOCK_ADDRESS (Instance->RegionBaseAddress, Lba, BlockSize);
+ if (BlockAddress != PrevBlockAddress) {
+ TempStatus = NorFlashUnlockSingleBlockIfNecessary (Instance, BlockAddress);
+ if (EFI_ERROR (TempStatus)) {
+ return EFI_DEVICE_ERROR;
+ }
+
+ PrevBlockAddress = BlockAddress;
+ }
+
+ TempStatus = NorFlashWriteSingleWord (Instance, WordAddr, WordToWrite);
+ if (EFI_ERROR (TempStatus)) {
+ return EFI_DEVICE_ERROR;
+ }
+ }
+
+ // Exit if we got here and could write all the data. Otherwise do the
+ // Erase-Write cycle.
+ if (!DoErase) {
+ return EFI_SUCCESS;
+ }
+ }
+
+ // Check we did get some memory. Buffer is BlockSize.
+ if (Instance->ShadowBuffer == NULL) {
+ DEBUG ((DEBUG_ERROR, "FvbWrite: ERROR - Buffer not ready\n"));
+ return EFI_DEVICE_ERROR;
+ }
+
+ // Read NOR Flash data into shadow buffer
+ TempStatus = NorFlashReadBlocks (Instance, Lba, BlockSize, Instance->ShadowBuffer);
+ if (EFI_ERROR (TempStatus)) {
+ // Return one of the pre-approved error statuses
+ return EFI_DEVICE_ERROR;
+ }
+
+ // Put the data at the appropriate location inside the buffer area
+ CopyMem ((VOID *)((UINTN)Instance->ShadowBuffer + Offset), Buffer, *NumBytes);
+
+ // Write the modified buffer back to the NorFlash
+ TempStatus = NorFlashWriteBlocks (Instance, Lba, BlockSize, Instance->ShadowBuffer);
+ if (EFI_ERROR (TempStatus)) {
+ // Return one of the pre-approved error statuses
+ return EFI_DEVICE_ERROR;
+ }
+
+ return EFI_SUCCESS;
+}
+
+/*
+ Although DiskIoDxe will automatically install the DiskIO protocol whenever
+ we install the BlockIO protocol, its implementation is sub-optimal as it reads
+ and writes entire blocks using the BlockIO protocol. In fact we can access
+ NOR flash with a finer granularity than that, so we can improve performance
+ by directly producing the DiskIO protocol.
+*/
+
+/**
+ Read BufferSize bytes from Offset into Buffer.
+
+ @param This Protocol instance pointer.
+ @param MediaId Id of the media, changes every time the media is replaced.
+ @param Offset The starting byte offset to read from
+ @param BufferSize Size of Buffer
+ @param Buffer Buffer containing read data
+
+ @retval EFI_SUCCESS The data was read correctly from the device.
+ @retval EFI_DEVICE_ERROR The device reported an error while performing the read.
+ @retval EFI_NO_MEDIA There is no media in the device.
+ @retval EFI_MEDIA_CHANGED The MediaId does not match the current device.
+ @retval EFI_INVALID_PARAMETER The read request contains device addresses that are not
+ valid for the device.
+
+**/
+EFI_STATUS
+EFIAPI
+NorFlashDiskIoReadDisk (
+ IN EFI_DISK_IO_PROTOCOL *This,
+ IN UINT32 MediaId,
+ IN UINT64 DiskOffset,
+ IN UINTN BufferSize,
+ OUT VOID *Buffer
+ )
+{
+ NOR_FLASH_INSTANCE *Instance;
+ UINT32 BlockSize;
+ UINT32 BlockOffset;
+ EFI_LBA Lba;
+
+ Instance = INSTANCE_FROM_DISKIO_THIS (This);
+
+ if (MediaId != Instance->Media.MediaId) {
+ return EFI_MEDIA_CHANGED;
+ }
+
+ BlockSize = Instance->Media.BlockSize;
+ Lba = (EFI_LBA)DivU64x32Remainder (DiskOffset, BlockSize, &BlockOffset);
+
+ return NorFlashRead (Instance, Lba, BlockOffset, BufferSize, Buffer);
+}
+
+/**
+ Writes a specified number of bytes to a device.
+
+ @param This Indicates a pointer to the calling context.
+ @param MediaId ID of the medium to be written.
+ @param Offset The starting byte offset on the logical block I/O device to write.
+ @param BufferSize The size in bytes of Buffer. The number of bytes to write to the device.
+ @param Buffer A pointer to the buffer containing the data to be written.
+
+ @retval EFI_SUCCESS The data was written correctly to the device.
+ @retval EFI_WRITE_PROTECTED The device can not be written to.
+ @retval EFI_DEVICE_ERROR The device reported an error while performing the write.
+ @retval EFI_NO_MEDIA There is no media in the device.
+ @retval EFI_MEDIA_CHANGED The MediaId does not match the current device.
+ @retval EFI_INVALID_PARAMETER The write request contains device addresses that are not
+ valid for the device.
+
+**/
+EFI_STATUS
+EFIAPI
+NorFlashDiskIoWriteDisk (
+ IN EFI_DISK_IO_PROTOCOL *This,
+ IN UINT32 MediaId,
+ IN UINT64 DiskOffset,
+ IN UINTN BufferSize,
+ IN VOID *Buffer
+ )
+{
+ NOR_FLASH_INSTANCE *Instance;
+ UINT32 BlockSize;
+ UINT32 BlockOffset;
+ EFI_LBA Lba;
+ UINTN RemainingBytes;
+ UINTN WriteSize;
+ EFI_STATUS Status;
+
+ Instance = INSTANCE_FROM_DISKIO_THIS (This);
+
+ if (MediaId != Instance->Media.MediaId) {
+ return EFI_MEDIA_CHANGED;
+ }
+
+ BlockSize = Instance->Media.BlockSize;
+ Lba = (EFI_LBA)DivU64x32Remainder (DiskOffset, BlockSize, &BlockOffset);
+
+ RemainingBytes = BufferSize;
+
+ // Write either all the remaining bytes, or the number of bytes that bring
+ // us up to a block boundary, whichever is less.
+ // (DiskOffset | (BlockSize - 1)) + 1) rounds DiskOffset up to the next
+ // block boundary (even if it is already on one).
+ WriteSize = MIN (RemainingBytes, ((DiskOffset | (BlockSize - 1)) + 1) - DiskOffset);
+
+ do {
+ if (WriteSize == BlockSize) {
+ // Write a full block
+ Status = NorFlashWriteFullBlock (Instance, Lba, Buffer, BlockSize / sizeof (UINT32));
+ } else {
+ // Write a partial block
+ Status = NorFlashWriteSingleBlock (Instance, Lba, BlockOffset, &WriteSize, Buffer);
+ }
+
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ // Now continue writing either all the remaining bytes or single blocks.
+ RemainingBytes -= WriteSize;
+ Buffer = (UINT8 *)Buffer + WriteSize;
+ Lba++;
+ BlockOffset = 0;
+ WriteSize = MIN (RemainingBytes, BlockSize);
+ } while (RemainingBytes);
+
+ return Status;
+}
+
+EFI_STATUS
+NorFlashReset (
+ IN NOR_FLASH_INSTANCE *Instance
+ )
+{
+ // As there is no specific RESET to perform, ensure that the devices is in the default Read Array mode
+ SEND_NOR_COMMAND (Instance->DeviceBaseAddress, 0, P30_CMD_READ_ARRAY);
+ return EFI_SUCCESS;
+}
+
+/**
+ Fixup internal data so that EFI can be call in virtual mode.
+ Call the passed in Child Notify event and convert any pointers in
+ lib to virtual mode.
+
+ @param[in] Event The Event that is being processed
+ @param[in] Context Event Context
+**/
+VOID
+EFIAPI
+NorFlashVirtualNotifyEvent (
+ IN EFI_EVENT Event,
+ IN VOID *Context
+ )
+{
+ UINTN Index;
+
+ for (Index = 0; Index < mNorFlashDeviceCount; Index++) {
+ EfiConvertPointer (0x0, (VOID **)&mNorFlashInstances[Index]->DeviceBaseAddress);
+ EfiConvertPointer (0x0, (VOID **)&mNorFlashInstances[Index]->RegionBaseAddress);
+
+ // Convert BlockIo protocol
+ EfiConvertPointer (0x0, (VOID **)&mNorFlashInstances[Index]->BlockIoProtocol.FlushBlocks);
+ EfiConvertPointer (0x0, (VOID **)&mNorFlashInstances[Index]->BlockIoProtocol.ReadBlocks);
+ EfiConvertPointer (0x0, (VOID **)&mNorFlashInstances[Index]->BlockIoProtocol.Reset);
+ EfiConvertPointer (0x0, (VOID **)&mNorFlashInstances[Index]->BlockIoProtocol.WriteBlocks);
+
+ // Convert Fvb
+ EfiConvertPointer (0x0, (VOID **)&mNorFlashInstances[Index]->FvbProtocol.EraseBlocks);
+ EfiConvertPointer (0x0, (VOID **)&mNorFlashInstances[Index]->FvbProtocol.GetAttributes);
+ EfiConvertPointer (0x0, (VOID **)&mNorFlashInstances[Index]->FvbProtocol.GetBlockSize);
+ EfiConvertPointer (0x0, (VOID **)&mNorFlashInstances[Index]->FvbProtocol.GetPhysicalAddress);
+ EfiConvertPointer (0x0, (VOID **)&mNorFlashInstances[Index]->FvbProtocol.Read);
+ EfiConvertPointer (0x0, (VOID **)&mNorFlashInstances[Index]->FvbProtocol.SetAttributes);
+ EfiConvertPointer (0x0, (VOID **)&mNorFlashInstances[Index]->FvbProtocol.Write);
+
+ if (mNorFlashInstances[Index]->ShadowBuffer != NULL) {
+ EfiConvertPointer (0x0, (VOID **)&mNorFlashInstances[Index]->ShadowBuffer);
+ }
+ }
+
+ return;
+}
diff --git a/OvmfPkg/VirtNorFlashDxe/VirtNorFlash.h b/OvmfPkg/VirtNorFlashDxe/VirtNorFlash.h new file mode 100644 index 0000000000..e46522a198 --- /dev/null +++ b/OvmfPkg/VirtNorFlashDxe/VirtNorFlash.h @@ -0,0 +1,422 @@ +/** @file NorFlash.h
+
+ Copyright (c) 2011 - 2014, ARM Ltd. All rights reserved.<BR>
+
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#ifndef __VIRT_NOR_FLASH__
+#define __VIRT_NOR_FLASH__
+
+#include <Base.h>
+#include <PiDxe.h>
+
+#include <Guid/EventGroup.h>
+
+#include <Protocol/BlockIo.h>
+#include <Protocol/DiskIo.h>
+#include <Protocol/FirmwareVolumeBlock.h>
+
+#include <Library/DebugLib.h>
+#include <Library/IoLib.h>
+#include <Library/UefiLib.h>
+#include <Library/UefiRuntimeLib.h>
+#include <Library/VirtNorFlashPlatformLib.h>
+
+#define NOR_FLASH_ERASE_RETRY 10
+
+// Device access macros
+// These are necessary because we use 2 x 16bit parts to make up 32bit data
+
+#define HIGH_16_BITS 0xFFFF0000
+#define LOW_16_BITS 0x0000FFFF
+#define LOW_8_BITS 0x000000FF
+
+#define FOLD_32BIT_INTO_16BIT(value) ( ( value >> 16 ) | ( value & LOW_16_BITS ) )
+
+#define GET_LOW_BYTE(value) ( value & LOW_8_BITS )
+#define GET_HIGH_BYTE(value) ( GET_LOW_BYTE( value >> 16 ) )
+
+// Each command must be sent simultaneously to both chips,
+// i.e. at the lower 16 bits AND at the higher 16 bits
+#define CREATE_NOR_ADDRESS(BaseAddr, OffsetAddr) ((BaseAddr) + ((OffsetAddr) << 2))
+#define CREATE_DUAL_CMD(Cmd) ( ( Cmd << 16) | ( Cmd & LOW_16_BITS) )
+#define SEND_NOR_COMMAND(BaseAddr, Offset, Cmd) MmioWrite32 (CREATE_NOR_ADDRESS(BaseAddr,Offset), CREATE_DUAL_CMD(Cmd))
+#define GET_NOR_BLOCK_ADDRESS(BaseAddr, Lba, LbaSize) ( BaseAddr + (UINTN)((Lba) * LbaSize) )
+
+// Status Register Bits
+#define P30_SR_BIT_WRITE (BIT7 << 16 | BIT7)
+#define P30_SR_BIT_ERASE_SUSPEND (BIT6 << 16 | BIT6)
+#define P30_SR_BIT_ERASE (BIT5 << 16 | BIT5)
+#define P30_SR_BIT_PROGRAM (BIT4 << 16 | BIT4)
+#define P30_SR_BIT_VPP (BIT3 << 16 | BIT3)
+#define P30_SR_BIT_PROGRAM_SUSPEND (BIT2 << 16 | BIT2)
+#define P30_SR_BIT_BLOCK_LOCKED (BIT1 << 16 | BIT1)
+#define P30_SR_BIT_BEFP (BIT0 << 16 | BIT0)
+
+// Device Commands for Intel StrataFlash(R) Embedded Memory (P30) Family
+
+// On chip buffer size for buffered programming operations
+// There are 2 chips, each chip can buffer up to 32 (16-bit)words, and each word is 2 bytes.
+// Therefore the total size of the buffer is 2 x 32 x 2 = 128 bytes
+#define P30_MAX_BUFFER_SIZE_IN_BYTES ((UINTN)128)
+#define P30_MAX_BUFFER_SIZE_IN_WORDS (P30_MAX_BUFFER_SIZE_IN_BYTES/((UINTN)4))
+#define MAX_BUFFERED_PROG_ITERATIONS 10000000
+#define BOUNDARY_OF_32_WORDS 0x7F
+
+// CFI Addresses
+#define P30_CFI_ADDR_QUERY_UNIQUE_QRY 0x10
+#define P30_CFI_ADDR_VENDOR_ID 0x13
+
+// CFI Data
+#define CFI_QRY 0x00595251
+
+// READ Commands
+#define P30_CMD_READ_DEVICE_ID 0x0090
+#define P30_CMD_READ_STATUS_REGISTER 0x0070
+#define P30_CMD_CLEAR_STATUS_REGISTER 0x0050
+#define P30_CMD_READ_ARRAY 0x00FF
+#define P30_CMD_READ_CFI_QUERY 0x0098
+
+// WRITE Commands
+#define P30_CMD_WORD_PROGRAM_SETUP 0x0040
+#define P30_CMD_ALTERNATE_WORD_PROGRAM_SETUP 0x0010
+#define P30_CMD_BUFFERED_PROGRAM_SETUP 0x00E8
+#define P30_CMD_BUFFERED_PROGRAM_CONFIRM 0x00D0
+#define P30_CMD_BEFP_SETUP 0x0080
+#define P30_CMD_BEFP_CONFIRM 0x00D0
+
+// ERASE Commands
+#define P30_CMD_BLOCK_ERASE_SETUP 0x0020
+#define P30_CMD_BLOCK_ERASE_CONFIRM 0x00D0
+
+// SUSPEND Commands
+#define P30_CMD_PROGRAM_OR_ERASE_SUSPEND 0x00B0
+#define P30_CMD_SUSPEND_RESUME 0x00D0
+
+// BLOCK LOCKING / UNLOCKING Commands
+#define P30_CMD_LOCK_BLOCK_SETUP 0x0060
+#define P30_CMD_LOCK_BLOCK 0x0001
+#define P30_CMD_UNLOCK_BLOCK 0x00D0
+#define P30_CMD_LOCK_DOWN_BLOCK 0x002F
+
+// PROTECTION Commands
+#define P30_CMD_PROGRAM_PROTECTION_REGISTER_SETUP 0x00C0
+
+// CONFIGURATION Commands
+#define P30_CMD_READ_CONFIGURATION_REGISTER_SETUP 0x0060
+#define P30_CMD_READ_CONFIGURATION_REGISTER 0x0003
+
+#define NOR_FLASH_SIGNATURE SIGNATURE_32('n', 'o', 'r', '0')
+#define INSTANCE_FROM_FVB_THIS(a) CR(a, NOR_FLASH_INSTANCE, FvbProtocol, NOR_FLASH_SIGNATURE)
+#define INSTANCE_FROM_BLKIO_THIS(a) CR(a, NOR_FLASH_INSTANCE, BlockIoProtocol, NOR_FLASH_SIGNATURE)
+#define INSTANCE_FROM_DISKIO_THIS(a) CR(a, NOR_FLASH_INSTANCE, DiskIoProtocol, NOR_FLASH_SIGNATURE)
+
+typedef struct _NOR_FLASH_INSTANCE NOR_FLASH_INSTANCE;
+
+#pragma pack (1)
+typedef struct {
+ VENDOR_DEVICE_PATH Vendor;
+ UINT8 Index;
+ EFI_DEVICE_PATH_PROTOCOL End;
+} NOR_FLASH_DEVICE_PATH;
+#pragma pack ()
+
+struct _NOR_FLASH_INSTANCE {
+ UINT32 Signature;
+ EFI_HANDLE Handle;
+
+ UINTN DeviceBaseAddress;
+ UINTN RegionBaseAddress;
+ UINTN Size;
+ EFI_LBA StartLba;
+
+ EFI_BLOCK_IO_PROTOCOL BlockIoProtocol;
+ EFI_BLOCK_IO_MEDIA Media;
+ EFI_DISK_IO_PROTOCOL DiskIoProtocol;
+
+ EFI_FIRMWARE_VOLUME_BLOCK2_PROTOCOL FvbProtocol;
+ VOID *ShadowBuffer;
+
+ NOR_FLASH_DEVICE_PATH DevicePath;
+};
+
+EFI_STATUS
+NorFlashReadCfiData (
+ IN UINTN DeviceBaseAddress,
+ IN UINTN CFI_Offset,
+ IN UINT32 NumberOfBytes,
+ OUT UINT32 *Data
+ );
+
+EFI_STATUS
+NorFlashWriteBuffer (
+ IN NOR_FLASH_INSTANCE *Instance,
+ IN UINTN TargetAddress,
+ IN UINTN BufferSizeInBytes,
+ IN UINT32 *Buffer
+ );
+
+//
+// BlockIO Protocol function EFI_BLOCK_IO_PROTOCOL.Reset
+//
+EFI_STATUS
+EFIAPI
+NorFlashBlockIoReset (
+ IN EFI_BLOCK_IO_PROTOCOL *This,
+ IN BOOLEAN ExtendedVerification
+ );
+
+//
+// BlockIO Protocol function EFI_BLOCK_IO_PROTOCOL.ReadBlocks
+//
+EFI_STATUS
+EFIAPI
+NorFlashBlockIoReadBlocks (
+ IN EFI_BLOCK_IO_PROTOCOL *This,
+ IN UINT32 MediaId,
+ IN EFI_LBA Lba,
+ IN UINTN BufferSizeInBytes,
+ OUT VOID *Buffer
+ );
+
+//
+// BlockIO Protocol function EFI_BLOCK_IO_PROTOCOL.WriteBlocks
+//
+EFI_STATUS
+EFIAPI
+NorFlashBlockIoWriteBlocks (
+ IN EFI_BLOCK_IO_PROTOCOL *This,
+ IN UINT32 MediaId,
+ IN EFI_LBA Lba,
+ IN UINTN BufferSizeInBytes,
+ IN VOID *Buffer
+ );
+
+//
+// BlockIO Protocol function EFI_BLOCK_IO_PROTOCOL.FlushBlocks
+//
+EFI_STATUS
+EFIAPI
+NorFlashBlockIoFlushBlocks (
+ IN EFI_BLOCK_IO_PROTOCOL *This
+ );
+
+//
+// DiskIO Protocol function EFI_DISK_IO_PROTOCOL.ReadDisk
+//
+EFI_STATUS
+EFIAPI
+NorFlashDiskIoReadDisk (
+ IN EFI_DISK_IO_PROTOCOL *This,
+ IN UINT32 MediaId,
+ IN UINT64 Offset,
+ IN UINTN BufferSize,
+ OUT VOID *Buffer
+ );
+
+//
+// DiskIO Protocol function EFI_DISK_IO_PROTOCOL.WriteDisk
+//
+EFI_STATUS
+EFIAPI
+NorFlashDiskIoWriteDisk (
+ IN EFI_DISK_IO_PROTOCOL *This,
+ IN UINT32 MediaId,
+ IN UINT64 Offset,
+ IN UINTN BufferSize,
+ IN VOID *Buffer
+ );
+
+//
+// NorFlashFvbDxe.c
+//
+
+EFI_STATUS
+EFIAPI
+FvbGetAttributes (
+ IN CONST EFI_FIRMWARE_VOLUME_BLOCK2_PROTOCOL *This,
+ OUT EFI_FVB_ATTRIBUTES_2 *Attributes
+ );
+
+EFI_STATUS
+EFIAPI
+FvbSetAttributes (
+ IN CONST EFI_FIRMWARE_VOLUME_BLOCK2_PROTOCOL *This,
+ IN OUT EFI_FVB_ATTRIBUTES_2 *Attributes
+ );
+
+EFI_STATUS
+EFIAPI
+FvbGetPhysicalAddress (
+ IN CONST EFI_FIRMWARE_VOLUME_BLOCK2_PROTOCOL *This,
+ OUT EFI_PHYSICAL_ADDRESS *Address
+ );
+
+EFI_STATUS
+EFIAPI
+FvbGetBlockSize (
+ IN CONST EFI_FIRMWARE_VOLUME_BLOCK2_PROTOCOL *This,
+ IN EFI_LBA Lba,
+ OUT UINTN *BlockSize,
+ OUT UINTN *NumberOfBlocks
+ );
+
+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
+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
+EFIAPI
+FvbEraseBlocks (
+ IN CONST EFI_FIRMWARE_VOLUME_BLOCK2_PROTOCOL *This,
+ ...
+ );
+
+EFI_STATUS
+ValidateFvHeader (
+ IN NOR_FLASH_INSTANCE *Instance
+ );
+
+EFI_STATUS
+InitializeFvAndVariableStoreHeaders (
+ IN NOR_FLASH_INSTANCE *Instance
+ );
+
+VOID
+EFIAPI
+FvbVirtualNotifyEvent (
+ IN EFI_EVENT Event,
+ IN VOID *Context
+ );
+
+//
+// NorFlashDxe.c
+//
+
+EFI_STATUS
+NorFlashWriteFullBlock (
+ IN NOR_FLASH_INSTANCE *Instance,
+ IN EFI_LBA Lba,
+ IN UINT32 *DataBuffer,
+ IN UINT32 BlockSizeInWords
+ );
+
+EFI_STATUS
+NorFlashUnlockAndEraseSingleBlock (
+ IN NOR_FLASH_INSTANCE *Instance,
+ IN UINTN BlockAddress
+ );
+
+EFI_STATUS
+NorFlashCreateInstance (
+ IN UINTN NorFlashDeviceBase,
+ IN UINTN NorFlashRegionBase,
+ IN UINTN NorFlashSize,
+ IN UINT32 Index,
+ IN UINT32 BlockSize,
+ IN BOOLEAN SupportFvb,
+ OUT NOR_FLASH_INSTANCE **NorFlashInstance
+ );
+
+EFI_STATUS
+EFIAPI
+NorFlashFvbInitialize (
+ IN NOR_FLASH_INSTANCE *Instance
+ );
+
+//
+// NorFlash.c
+//
+EFI_STATUS
+NorFlashWriteSingleBlock (
+ IN NOR_FLASH_INSTANCE *Instance,
+ IN EFI_LBA Lba,
+ IN UINTN Offset,
+ IN OUT UINTN *NumBytes,
+ IN UINT8 *Buffer
+ );
+
+EFI_STATUS
+NorFlashWriteBlocks (
+ IN NOR_FLASH_INSTANCE *Instance,
+ IN EFI_LBA Lba,
+ IN UINTN BufferSizeInBytes,
+ IN VOID *Buffer
+ );
+
+EFI_STATUS
+NorFlashReadBlocks (
+ IN NOR_FLASH_INSTANCE *Instance,
+ IN EFI_LBA Lba,
+ IN UINTN BufferSizeInBytes,
+ OUT VOID *Buffer
+ );
+
+EFI_STATUS
+NorFlashRead (
+ IN NOR_FLASH_INSTANCE *Instance,
+ IN EFI_LBA Lba,
+ IN UINTN Offset,
+ IN UINTN BufferSizeInBytes,
+ OUT VOID *Buffer
+ );
+
+EFI_STATUS
+NorFlashWrite (
+ IN NOR_FLASH_INSTANCE *Instance,
+ IN EFI_LBA Lba,
+ IN UINTN Offset,
+ IN OUT UINTN *NumBytes,
+ IN UINT8 *Buffer
+ );
+
+EFI_STATUS
+NorFlashReset (
+ IN NOR_FLASH_INSTANCE *Instance
+ );
+
+EFI_STATUS
+NorFlashEraseSingleBlock (
+ IN NOR_FLASH_INSTANCE *Instance,
+ IN UINTN BlockAddress
+ );
+
+EFI_STATUS
+NorFlashUnlockSingleBlockIfNecessary (
+ IN NOR_FLASH_INSTANCE *Instance,
+ IN UINTN BlockAddress
+ );
+
+EFI_STATUS
+NorFlashWriteSingleWord (
+ IN NOR_FLASH_INSTANCE *Instance,
+ IN UINTN WordAddress,
+ IN UINT32 WriteData
+ );
+
+VOID
+EFIAPI
+NorFlashVirtualNotifyEvent (
+ IN EFI_EVENT Event,
+ IN VOID *Context
+ );
+
+#endif /* __VIRT_NOR_FLASH__ */
diff --git a/OvmfPkg/VirtNorFlashDxe/VirtNorFlashBlockIoDxe.c b/OvmfPkg/VirtNorFlashDxe/VirtNorFlashBlockIoDxe.c new file mode 100644 index 0000000000..ecf152e355 --- /dev/null +++ b/OvmfPkg/VirtNorFlashDxe/VirtNorFlashBlockIoDxe.c @@ -0,0 +1,123 @@ +/** @file NorFlashBlockIoDxe.c
+
+ Copyright (c) 2011-2013, ARM Ltd. All rights reserved.<BR>
+
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#include <Library/BaseMemoryLib.h>
+#include <Library/UefiBootServicesTableLib.h>
+
+#include "VirtNorFlash.h"
+
+//
+// BlockIO Protocol function EFI_BLOCK_IO_PROTOCOL.Reset
+//
+EFI_STATUS
+EFIAPI
+NorFlashBlockIoReset (
+ IN EFI_BLOCK_IO_PROTOCOL *This,
+ IN BOOLEAN ExtendedVerification
+ )
+{
+ NOR_FLASH_INSTANCE *Instance;
+
+ Instance = INSTANCE_FROM_BLKIO_THIS (This);
+
+ DEBUG ((DEBUG_BLKIO, "NorFlashBlockIoReset(MediaId=0x%x)\n", This->Media->MediaId));
+
+ return NorFlashReset (Instance);
+}
+
+//
+// BlockIO Protocol function EFI_BLOCK_IO_PROTOCOL.ReadBlocks
+//
+EFI_STATUS
+EFIAPI
+NorFlashBlockIoReadBlocks (
+ IN EFI_BLOCK_IO_PROTOCOL *This,
+ IN UINT32 MediaId,
+ IN EFI_LBA Lba,
+ IN UINTN BufferSizeInBytes,
+ OUT VOID *Buffer
+ )
+{
+ NOR_FLASH_INSTANCE *Instance;
+ EFI_STATUS Status;
+ EFI_BLOCK_IO_MEDIA *Media;
+
+ if (This == NULL) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ Instance = INSTANCE_FROM_BLKIO_THIS (This);
+ Media = This->Media;
+
+ DEBUG ((DEBUG_BLKIO, "NorFlashBlockIoReadBlocks(MediaId=0x%x, Lba=%ld, BufferSize=0x%x bytes (%d kB), BufferPtr @ 0x%08x)\n", MediaId, Lba, BufferSizeInBytes, BufferSizeInBytes, Buffer));
+
+ if (!Media) {
+ Status = EFI_INVALID_PARAMETER;
+ } else if (!Media->MediaPresent) {
+ Status = EFI_NO_MEDIA;
+ } else if (Media->MediaId != MediaId) {
+ Status = EFI_MEDIA_CHANGED;
+ } else if ((Media->IoAlign > 2) && (((UINTN)Buffer & (Media->IoAlign - 1)) != 0)) {
+ Status = EFI_INVALID_PARAMETER;
+ } else {
+ Status = NorFlashReadBlocks (Instance, Lba, BufferSizeInBytes, Buffer);
+ }
+
+ return Status;
+}
+
+//
+// BlockIO Protocol function EFI_BLOCK_IO_PROTOCOL.WriteBlocks
+//
+EFI_STATUS
+EFIAPI
+NorFlashBlockIoWriteBlocks (
+ IN EFI_BLOCK_IO_PROTOCOL *This,
+ IN UINT32 MediaId,
+ IN EFI_LBA Lba,
+ IN UINTN BufferSizeInBytes,
+ IN VOID *Buffer
+ )
+{
+ NOR_FLASH_INSTANCE *Instance;
+ EFI_STATUS Status;
+
+ Instance = INSTANCE_FROM_BLKIO_THIS (This);
+
+ DEBUG ((DEBUG_BLKIO, "NorFlashBlockIoWriteBlocks(MediaId=0x%x, Lba=%ld, BufferSize=0x%x bytes, BufferPtr @ 0x%08x)\n", MediaId, Lba, BufferSizeInBytes, Buffer));
+
+ if ( !This->Media->MediaPresent ) {
+ Status = EFI_NO_MEDIA;
+ } else if ( This->Media->MediaId != MediaId ) {
+ Status = EFI_MEDIA_CHANGED;
+ } else if ( This->Media->ReadOnly ) {
+ Status = EFI_WRITE_PROTECTED;
+ } else {
+ Status = NorFlashWriteBlocks (Instance, Lba, BufferSizeInBytes, Buffer);
+ }
+
+ return Status;
+}
+
+//
+// BlockIO Protocol function EFI_BLOCK_IO_PROTOCOL.FlushBlocks
+//
+EFI_STATUS
+EFIAPI
+NorFlashBlockIoFlushBlocks (
+ IN EFI_BLOCK_IO_PROTOCOL *This
+ )
+{
+ // No Flush required for the NOR Flash driver
+ // because cache operations are not permitted.
+
+ DEBUG ((DEBUG_BLKIO, "NorFlashBlockIoFlushBlocks: Function NOT IMPLEMENTED (not required).\n"));
+
+ // Nothing to do so just return without error
+ return EFI_SUCCESS;
+}
diff --git a/OvmfPkg/VirtNorFlashDxe/VirtNorFlashDxe.c b/OvmfPkg/VirtNorFlashDxe/VirtNorFlashDxe.c new file mode 100644 index 0000000000..819425545e --- /dev/null +++ b/OvmfPkg/VirtNorFlashDxe/VirtNorFlashDxe.c @@ -0,0 +1,506 @@ +/** @file NorFlashDxe.c
+
+ Copyright (c) 2011 - 2021, Arm Limited. All rights reserved.<BR>
+
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#include <Library/BaseMemoryLib.h>
+#include <Library/DxeServicesTableLib.h>
+#include <Library/HobLib.h>
+#include <Library/MemoryAllocationLib.h>
+#include <Library/PcdLib.h>
+#include <Library/UefiBootServicesTableLib.h>
+#include <Library/UefiLib.h>
+
+#include "VirtNorFlash.h"
+
+STATIC EFI_EVENT mNorFlashVirtualAddrChangeEvent;
+
+//
+// Global variable declarations
+//
+NOR_FLASH_INSTANCE **mNorFlashInstances;
+UINT32 mNorFlashDeviceCount;
+UINTN mFlashNvStorageVariableBase;
+EFI_EVENT mFvbVirtualAddrChangeEvent;
+
+NOR_FLASH_INSTANCE mNorFlashInstanceTemplate = {
+ NOR_FLASH_SIGNATURE, // Signature
+ NULL, // Handle ... NEED TO BE FILLED
+
+ 0, // DeviceBaseAddress ... NEED TO BE FILLED
+ 0, // RegionBaseAddress ... NEED TO BE FILLED
+ 0, // Size ... NEED TO BE FILLED
+ 0, // StartLba
+
+ {
+ EFI_BLOCK_IO_PROTOCOL_REVISION2, // Revision
+ NULL, // Media ... NEED TO BE FILLED
+ NorFlashBlockIoReset, // Reset;
+ NorFlashBlockIoReadBlocks, // ReadBlocks
+ NorFlashBlockIoWriteBlocks, // WriteBlocks
+ NorFlashBlockIoFlushBlocks // FlushBlocks
+ }, // BlockIoProtocol
+
+ {
+ 0, // MediaId ... NEED TO BE FILLED
+ FALSE, // RemovableMedia
+ TRUE, // MediaPresent
+ FALSE, // LogicalPartition
+ FALSE, // ReadOnly
+ FALSE, // WriteCaching;
+ 0, // BlockSize ... NEED TO BE FILLED
+ 4, // IoAlign
+ 0, // LastBlock ... NEED TO BE FILLED
+ 0, // LowestAlignedLba
+ 1, // LogicalBlocksPerPhysicalBlock
+ }, // Media;
+
+ {
+ EFI_DISK_IO_PROTOCOL_REVISION, // Revision
+ NorFlashDiskIoReadDisk, // ReadDisk
+ NorFlashDiskIoWriteDisk // WriteDisk
+ },
+
+ {
+ FvbGetAttributes, // GetAttributes
+ FvbSetAttributes, // SetAttributes
+ FvbGetPhysicalAddress, // GetPhysicalAddress
+ FvbGetBlockSize, // GetBlockSize
+ FvbRead, // Read
+ FvbWrite, // Write
+ FvbEraseBlocks, // EraseBlocks
+ NULL, // ParentHandle
+ }, // FvbProtoccol;
+ NULL, // ShadowBuffer
+ {
+ {
+ {
+ HARDWARE_DEVICE_PATH,
+ HW_VENDOR_DP,
+ {
+ (UINT8)(OFFSET_OF (NOR_FLASH_DEVICE_PATH, End)),
+ (UINT8)(OFFSET_OF (NOR_FLASH_DEVICE_PATH, End) >> 8)
+ }
+ },
+ { 0x0, 0x0, 0x0, { 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0 }
+ }, // GUID ... NEED TO BE FILLED
+ },
+ 0, // Index
+ {
+ END_DEVICE_PATH_TYPE,
+ END_ENTIRE_DEVICE_PATH_SUBTYPE,
+ { sizeof (EFI_DEVICE_PATH_PROTOCOL), 0 }
+ }
+ } // DevicePath
+};
+
+EFI_STATUS
+NorFlashCreateInstance (
+ IN UINTN NorFlashDeviceBase,
+ IN UINTN NorFlashRegionBase,
+ IN UINTN NorFlashSize,
+ IN UINT32 Index,
+ IN UINT32 BlockSize,
+ IN BOOLEAN SupportFvb,
+ OUT NOR_FLASH_INSTANCE **NorFlashInstance
+ )
+{
+ EFI_STATUS Status;
+ NOR_FLASH_INSTANCE *Instance;
+
+ ASSERT (NorFlashInstance != NULL);
+
+ Instance = AllocateRuntimeCopyPool (sizeof (NOR_FLASH_INSTANCE), &mNorFlashInstanceTemplate);
+ if (Instance == NULL) {
+ return EFI_OUT_OF_RESOURCES;
+ }
+
+ Instance->DeviceBaseAddress = NorFlashDeviceBase;
+ Instance->RegionBaseAddress = NorFlashRegionBase;
+ Instance->Size = NorFlashSize;
+
+ Instance->BlockIoProtocol.Media = &Instance->Media;
+ Instance->Media.MediaId = Index;
+ Instance->Media.BlockSize = BlockSize;
+ Instance->Media.LastBlock = (NorFlashSize / BlockSize)-1;
+
+ CopyGuid (&Instance->DevicePath.Vendor.Guid, &gEfiCallerIdGuid);
+ Instance->DevicePath.Index = (UINT8)Index;
+
+ Instance->ShadowBuffer = AllocateRuntimePool (BlockSize);
+ if (Instance->ShadowBuffer == NULL) {
+ return EFI_OUT_OF_RESOURCES;
+ }
+
+ if (SupportFvb) {
+ NorFlashFvbInitialize (Instance);
+
+ Status = gBS->InstallMultipleProtocolInterfaces (
+ &Instance->Handle,
+ &gEfiDevicePathProtocolGuid,
+ &Instance->DevicePath,
+ &gEfiBlockIoProtocolGuid,
+ &Instance->BlockIoProtocol,
+ &gEfiFirmwareVolumeBlockProtocolGuid,
+ &Instance->FvbProtocol,
+ NULL
+ );
+ if (EFI_ERROR (Status)) {
+ FreePool (Instance);
+ return Status;
+ }
+ } else {
+ Status = gBS->InstallMultipleProtocolInterfaces (
+ &Instance->Handle,
+ &gEfiDevicePathProtocolGuid,
+ &Instance->DevicePath,
+ &gEfiBlockIoProtocolGuid,
+ &Instance->BlockIoProtocol,
+ &gEfiDiskIoProtocolGuid,
+ &Instance->DiskIoProtocol,
+ NULL
+ );
+ if (EFI_ERROR (Status)) {
+ FreePool (Instance);
+ return Status;
+ }
+ }
+
+ *NorFlashInstance = Instance;
+ return Status;
+}
+
+/**
+ * This function unlock and erase an entire NOR Flash block.
+ **/
+EFI_STATUS
+NorFlashUnlockAndEraseSingleBlock (
+ IN NOR_FLASH_INSTANCE *Instance,
+ IN UINTN BlockAddress
+ )
+{
+ EFI_STATUS Status;
+ UINTN Index;
+ EFI_TPL OriginalTPL;
+
+ if (!EfiAtRuntime ()) {
+ // Raise TPL to TPL_HIGH to stop anyone from interrupting us.
+ OriginalTPL = gBS->RaiseTPL (TPL_HIGH_LEVEL);
+ } else {
+ // This initialization is only to prevent the compiler to complain about the
+ // use of uninitialized variables
+ OriginalTPL = TPL_HIGH_LEVEL;
+ }
+
+ Index = 0;
+ // The block erase might fail a first time (SW bug ?). Retry it ...
+ do {
+ // Unlock the block if we have to
+ Status = NorFlashUnlockSingleBlockIfNecessary (Instance, BlockAddress);
+ if (EFI_ERROR (Status)) {
+ break;
+ }
+
+ Status = NorFlashEraseSingleBlock (Instance, BlockAddress);
+ Index++;
+ } while ((Index < NOR_FLASH_ERASE_RETRY) && (Status == EFI_WRITE_PROTECTED));
+
+ if (Index == NOR_FLASH_ERASE_RETRY) {
+ DEBUG ((DEBUG_ERROR, "EraseSingleBlock(BlockAddress=0x%08x: Block Locked Error (try to erase %d times)\n", BlockAddress, Index));
+ }
+
+ if (!EfiAtRuntime ()) {
+ // Interruptions can resume.
+ gBS->RestoreTPL (OriginalTPL);
+ }
+
+ return Status;
+}
+
+EFI_STATUS
+NorFlashWriteFullBlock (
+ IN NOR_FLASH_INSTANCE *Instance,
+ IN EFI_LBA Lba,
+ IN UINT32 *DataBuffer,
+ IN UINT32 BlockSizeInWords
+ )
+{
+ EFI_STATUS Status;
+ UINTN WordAddress;
+ UINT32 WordIndex;
+ UINTN BufferIndex;
+ UINTN BlockAddress;
+ UINTN BuffersInBlock;
+ UINTN RemainingWords;
+ EFI_TPL OriginalTPL;
+ UINTN Cnt;
+
+ Status = EFI_SUCCESS;
+
+ // Get the physical address of the block
+ BlockAddress = GET_NOR_BLOCK_ADDRESS (Instance->RegionBaseAddress, Lba, BlockSizeInWords * 4);
+
+ // Start writing from the first address at the start of the block
+ WordAddress = BlockAddress;
+
+ if (!EfiAtRuntime ()) {
+ // Raise TPL to TPL_HIGH to stop anyone from interrupting us.
+ OriginalTPL = gBS->RaiseTPL (TPL_HIGH_LEVEL);
+ } else {
+ // This initialization is only to prevent the compiler to complain about the
+ // use of uninitialized variables
+ OriginalTPL = TPL_HIGH_LEVEL;
+ }
+
+ Status = NorFlashUnlockAndEraseSingleBlock (Instance, BlockAddress);
+ if (EFI_ERROR (Status)) {
+ DEBUG ((DEBUG_ERROR, "WriteSingleBlock: ERROR - Failed to Unlock and Erase the single block at 0x%X\n", BlockAddress));
+ goto EXIT;
+ }
+
+ // To speed up the programming operation, NOR Flash is programmed using the Buffered Programming method.
+
+ // Check that the address starts at a 32-word boundary, i.e. last 7 bits must be zero
+ if ((WordAddress & BOUNDARY_OF_32_WORDS) == 0x00) {
+ // First, break the entire block into buffer-sized chunks.
+ BuffersInBlock = (UINTN)(BlockSizeInWords * 4) / P30_MAX_BUFFER_SIZE_IN_BYTES;
+
+ // Then feed each buffer chunk to the NOR Flash
+ // If a buffer does not contain any data, don't write it.
+ for (BufferIndex = 0;
+ BufferIndex < BuffersInBlock;
+ BufferIndex++, WordAddress += P30_MAX_BUFFER_SIZE_IN_BYTES, DataBuffer += P30_MAX_BUFFER_SIZE_IN_WORDS
+ )
+ {
+ // Check the buffer to see if it contains any data (not set all 1s).
+ for (Cnt = 0; Cnt < P30_MAX_BUFFER_SIZE_IN_WORDS; Cnt++) {
+ if (~DataBuffer[Cnt] != 0 ) {
+ // Some data found, write the buffer.
+ Status = NorFlashWriteBuffer (
+ Instance,
+ WordAddress,
+ P30_MAX_BUFFER_SIZE_IN_BYTES,
+ DataBuffer
+ );
+ if (EFI_ERROR (Status)) {
+ goto EXIT;
+ }
+
+ break;
+ }
+ }
+ }
+
+ // Finally, finish off any remaining words that are less than the maximum size of the buffer
+ RemainingWords = BlockSizeInWords % P30_MAX_BUFFER_SIZE_IN_WORDS;
+
+ if (RemainingWords != 0) {
+ Status = NorFlashWriteBuffer (Instance, WordAddress, (RemainingWords * 4), DataBuffer);
+ if (EFI_ERROR (Status)) {
+ goto EXIT;
+ }
+ }
+ } else {
+ // For now, use the single word programming algorithm
+ // It is unlikely that the NOR Flash will exist in an address which falls within a 32 word boundary range,
+ // i.e. which ends in the range 0x......01 - 0x......7F.
+ for (WordIndex = 0; WordIndex < BlockSizeInWords; WordIndex++, DataBuffer++, WordAddress = WordAddress + 4) {
+ Status = NorFlashWriteSingleWord (Instance, WordAddress, *DataBuffer);
+ if (EFI_ERROR (Status)) {
+ goto EXIT;
+ }
+ }
+ }
+
+EXIT:
+ if (!EfiAtRuntime ()) {
+ // Interruptions can resume.
+ gBS->RestoreTPL (OriginalTPL);
+ }
+
+ if (EFI_ERROR (Status)) {
+ DEBUG ((DEBUG_ERROR, "NOR FLASH Programming [WriteSingleBlock] failed at address 0x%08x. Exit Status = \"%r\".\n", WordAddress, Status));
+ }
+
+ return Status;
+}
+
+EFI_STATUS
+EFIAPI
+NorFlashInitialise (
+ IN EFI_HANDLE ImageHandle,
+ IN EFI_SYSTEM_TABLE *SystemTable
+ )
+{
+ EFI_STATUS Status;
+ UINT32 Index;
+ VIRT_NOR_FLASH_DESCRIPTION *NorFlashDevices;
+ BOOLEAN ContainVariableStorage;
+
+ Status = VirtNorFlashPlatformInitialization ();
+ if (EFI_ERROR (Status)) {
+ DEBUG ((DEBUG_ERROR, "NorFlashInitialise: Fail to initialize Nor Flash devices\n"));
+ return Status;
+ }
+
+ Status = VirtNorFlashPlatformGetDevices (&NorFlashDevices, &mNorFlashDeviceCount);
+ if (EFI_ERROR (Status)) {
+ DEBUG ((DEBUG_ERROR, "NorFlashInitialise: Fail to get Nor Flash devices\n"));
+ return Status;
+ }
+
+ mNorFlashInstances = AllocateRuntimePool (sizeof (NOR_FLASH_INSTANCE *) * mNorFlashDeviceCount);
+
+ for (Index = 0; Index < mNorFlashDeviceCount; Index++) {
+ // Check if this NOR Flash device contain the variable storage region
+
+ if (PcdGet64 (PcdFlashNvStorageVariableBase64) != 0) {
+ ContainVariableStorage =
+ (NorFlashDevices[Index].RegionBaseAddress <= PcdGet64 (PcdFlashNvStorageVariableBase64)) &&
+ (PcdGet64 (PcdFlashNvStorageVariableBase64) + PcdGet32 (PcdFlashNvStorageVariableSize) <=
+ NorFlashDevices[Index].RegionBaseAddress + NorFlashDevices[Index].Size);
+ } else {
+ ContainVariableStorage =
+ (NorFlashDevices[Index].RegionBaseAddress <= PcdGet32 (PcdFlashNvStorageVariableBase)) &&
+ (PcdGet32 (PcdFlashNvStorageVariableBase) + PcdGet32 (PcdFlashNvStorageVariableSize) <=
+ NorFlashDevices[Index].RegionBaseAddress + NorFlashDevices[Index].Size);
+ }
+
+ Status = NorFlashCreateInstance (
+ NorFlashDevices[Index].DeviceBaseAddress,
+ NorFlashDevices[Index].RegionBaseAddress,
+ NorFlashDevices[Index].Size,
+ Index,
+ NorFlashDevices[Index].BlockSize,
+ ContainVariableStorage,
+ &mNorFlashInstances[Index]
+ );
+ if (EFI_ERROR (Status)) {
+ DEBUG ((DEBUG_ERROR, "NorFlashInitialise: Fail to create instance for NorFlash[%d]\n", Index));
+ }
+ }
+
+ //
+ // Register for the virtual address change event
+ //
+ Status = gBS->CreateEventEx (
+ EVT_NOTIFY_SIGNAL,
+ TPL_NOTIFY,
+ NorFlashVirtualNotifyEvent,
+ NULL,
+ &gEfiEventVirtualAddressChangeGuid,
+ &mNorFlashVirtualAddrChangeEvent
+ );
+ ASSERT_EFI_ERROR (Status);
+
+ return Status;
+}
+
+EFI_STATUS
+EFIAPI
+NorFlashFvbInitialize (
+ IN NOR_FLASH_INSTANCE *Instance
+ )
+{
+ EFI_STATUS Status;
+ UINT32 FvbNumLba;
+ EFI_BOOT_MODE BootMode;
+ UINTN RuntimeMmioRegionSize;
+
+ DEBUG ((DEBUG_BLKIO, "NorFlashFvbInitialize\n"));
+ ASSERT ((Instance != NULL));
+
+ //
+ // Declare the Non-Volatile storage as EFI_MEMORY_RUNTIME
+ //
+
+ // Note: all the NOR Flash region needs to be reserved into the UEFI Runtime memory;
+ // even if we only use the small block region at the top of the NOR Flash.
+ // The reason is when the NOR Flash memory is set into program mode, the command
+ // is written as the base of the flash region (ie: Instance->DeviceBaseAddress)
+ RuntimeMmioRegionSize = (Instance->RegionBaseAddress - Instance->DeviceBaseAddress) + Instance->Size;
+
+ Status = gDS->AddMemorySpace (
+ EfiGcdMemoryTypeMemoryMappedIo,
+ Instance->DeviceBaseAddress,
+ RuntimeMmioRegionSize,
+ EFI_MEMORY_UC | EFI_MEMORY_RUNTIME
+ );
+ ASSERT_EFI_ERROR (Status);
+
+ Status = gDS->SetMemorySpaceAttributes (
+ Instance->DeviceBaseAddress,
+ RuntimeMmioRegionSize,
+ EFI_MEMORY_UC | EFI_MEMORY_RUNTIME
+ );
+ ASSERT_EFI_ERROR (Status);
+
+ mFlashNvStorageVariableBase = (PcdGet64 (PcdFlashNvStorageVariableBase64) != 0) ?
+ PcdGet64 (PcdFlashNvStorageVariableBase64) : PcdGet32 (PcdFlashNvStorageVariableBase);
+
+ // Set the index of the first LBA for the FVB
+ Instance->StartLba = (mFlashNvStorageVariableBase - 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 ((DEBUG_INFO, "%a: The FVB Header is not valid.\n", __FUNCTION__));
+ DEBUG ((
+ DEBUG_INFO,
+ "%a: Installing a correct one for this volume.\n",
+ __FUNCTION__
+ ));
+
+ // 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;
+ }
+ }
+
+ //
+ // The driver implementing the variable read service can now be dispatched;
+ // the varstore headers are in place.
+ //
+ Status = gBS->InstallProtocolInterface (
+ &gImageHandle,
+ &gEdkiiNvVarStoreFormattedGuid,
+ EFI_NATIVE_INTERFACE,
+ NULL
+ );
+ ASSERT_EFI_ERROR (Status);
+
+ //
+ // Register for the virtual address change event
+ //
+ Status = gBS->CreateEventEx (
+ EVT_NOTIFY_SIGNAL,
+ TPL_NOTIFY,
+ FvbVirtualNotifyEvent,
+ NULL,
+ &gEfiEventVirtualAddressChangeGuid,
+ &mFvbVirtualAddrChangeEvent
+ );
+ ASSERT_EFI_ERROR (Status);
+
+ return Status;
+}
diff --git a/OvmfPkg/VirtNorFlashDxe/VirtNorFlashDxe.inf b/OvmfPkg/VirtNorFlashDxe/VirtNorFlashDxe.inf new file mode 100644 index 0000000000..1bf50e4823 --- /dev/null +++ b/OvmfPkg/VirtNorFlashDxe/VirtNorFlashDxe.inf @@ -0,0 +1,72 @@ +#/** @file
+#
+# Component description file for NorFlashDxe module
+#
+# Copyright (c) 2011 - 2021, Arm Limited. All rights reserved.<BR>
+#
+# SPDX-License-Identifier: BSD-2-Clause-Patent
+#
+#**/
+
+[Defines]
+ INF_VERSION = 1.29
+ BASE_NAME = VirtNorFlashDxe
+ FILE_GUID = e452cabd-5fe1-4d97-8161-e80ed6a409a8
+ MODULE_TYPE = DXE_RUNTIME_DRIVER
+ VERSION_STRING = 1.0
+ ENTRY_POINT = NorFlashInitialise
+
+[Sources.common]
+ VirtNorFlash.c
+ VirtNorFlash.h
+ VirtNorFlashBlockIoDxe.c
+ VirtNorFlashDxe.c
+ VirtNorFlashFvb.c
+
+[Packages]
+ ArmPlatformPkg/ArmPlatformPkg.dec
+ EmbeddedPkg/EmbeddedPkg.dec
+ MdePkg/MdePkg.dec
+ MdeModulePkg/MdeModulePkg.dec
+ OvmfPkg/OvmfPkg.dec
+
+[LibraryClasses]
+ BaseLib
+ DebugLib
+ DxeServicesTableLib
+ HobLib
+ IoLib
+ UefiBootServicesTableLib
+ UefiDriverEntryPoint
+ UefiLib
+ UefiRuntimeLib
+ VirtNorFlashPlatformLib
+
+[Guids]
+ gEdkiiNvVarStoreFormattedGuid ## PRODUCES ## PROTOCOL
+ gEfiAuthenticatedVariableGuid
+ gEfiEventVirtualAddressChangeGuid
+ gEfiSystemNvDataFvGuid
+ gEfiVariableGuid
+
+[Protocols]
+ gEfiBlockIoProtocolGuid
+ gEfiDevicePathProtocolGuid
+ gEfiDiskIoProtocolGuid
+ gEfiFirmwareVolumeBlockProtocolGuid
+
+[Pcd.common]
+ gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageVariableBase64
+ gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageVariableBase
+ gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageVariableSize
+ gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageFtwWorkingBase64
+ gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageFtwWorkingBase
+ gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageFtwWorkingSize
+ gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageFtwSpareBase64
+ gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageFtwSpareBase
+ gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageFtwSpareSize
+
+ gArmPlatformTokenSpaceGuid.PcdNorFlashCheckBlockLocked
+
+[Depex]
+ gEfiCpuArchProtocolGuid
diff --git a/OvmfPkg/VirtNorFlashDxe/VirtNorFlashFvb.c b/OvmfPkg/VirtNorFlashDxe/VirtNorFlashFvb.c new file mode 100644 index 0000000000..c824e0a0fb --- /dev/null +++ b/OvmfPkg/VirtNorFlashDxe/VirtNorFlashFvb.c @@ -0,0 +1,777 @@ +/*++ @file NorFlashFvbDxe.c
+
+ Copyright (c) 2011 - 2021, Arm Limited. All rights reserved.<BR>
+
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+
+ --*/
+
+#include <PiDxe.h>
+
+#include <Library/BaseLib.h>
+#include <Library/BaseMemoryLib.h>
+#include <Library/MemoryAllocationLib.h>
+#include <Library/PcdLib.h>
+#include <Library/UefiLib.h>
+
+#include <Guid/NvVarStoreFormatted.h>
+#include <Guid/SystemNvDataGuid.h>
+#include <Guid/VariableFormat.h>
+
+#include "VirtNorFlash.h"
+
+extern UINTN mFlashNvStorageVariableBase;
+///
+/// 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;
+ UINT32 NvStorageFtwSpareSize;
+ UINT32 NvStorageFtwWorkingSize;
+ UINT32 NvStorageVariableSize;
+ UINT64 NvStorageFtwSpareBase;
+ UINT64 NvStorageFtwWorkingBase;
+ UINT64 NvStorageVariableBase;
+
+ HeadersLength = sizeof (EFI_FIRMWARE_VOLUME_HEADER) + sizeof (EFI_FV_BLOCK_MAP_ENTRY) + sizeof (VARIABLE_STORE_HEADER);
+ Headers = AllocateZeroPool (HeadersLength);
+
+ NvStorageFtwWorkingSize = PcdGet32 (PcdFlashNvStorageFtwWorkingSize);
+ NvStorageFtwSpareSize = PcdGet32 (PcdFlashNvStorageFtwSpareSize);
+ NvStorageVariableSize = PcdGet32 (PcdFlashNvStorageVariableSize);
+
+ NvStorageFtwSpareBase = (PcdGet64 (PcdFlashNvStorageFtwSpareBase64) != 0) ?
+ PcdGet64 (PcdFlashNvStorageFtwSpareBase64) : PcdGet32 (PcdFlashNvStorageFtwSpareBase);
+ NvStorageFtwWorkingBase = (PcdGet64 (PcdFlashNvStorageFtwWorkingBase64) != 0) ?
+ PcdGet64 (PcdFlashNvStorageFtwWorkingBase64) : PcdGet32 (PcdFlashNvStorageFtwWorkingBase);
+ NvStorageVariableBase = (PcdGet64 (PcdFlashNvStorageVariableBase64) != 0) ?
+ PcdGet64 (PcdFlashNvStorageVariableBase64) : PcdGet32 (PcdFlashNvStorageVariableBase);
+
+ // FirmwareVolumeHeader->FvLength is declared to have the Variable area AND the FTW working area AND the FTW Spare contiguous.
+ if ((NvStorageVariableBase + NvStorageVariableSize) != NvStorageFtwWorkingBase) {
+ DEBUG ((
+ DEBUG_ERROR,
+ "%a: NvStorageFtwWorkingBase is not contiguous with NvStorageVariableBase region\n",
+ __FUNCTION__
+ ));
+ return EFI_INVALID_PARAMETER;
+ }
+
+ if ((NvStorageFtwWorkingBase + NvStorageFtwWorkingSize) != NvStorageFtwSpareBase) {
+ DEBUG ((
+ DEBUG_ERROR,
+ "%a: NvStorageFtwSpareBase is not contiguous with NvStorageFtwWorkingBase region\n",
+ __FUNCTION__
+ ));
+ return EFI_INVALID_PARAMETER;
+ }
+
+ // Check if the size of the area is at least one block size
+ if ((NvStorageVariableSize <= 0) || (NvStorageVariableSize / Instance->Media.BlockSize <= 0)) {
+ DEBUG ((
+ DEBUG_ERROR,
+ "%a: NvStorageVariableSize is 0x%x, should be atleast one block size\n",
+ __FUNCTION__,
+ NvStorageVariableSize
+ ));
+ return EFI_INVALID_PARAMETER;
+ }
+
+ if ((NvStorageFtwWorkingSize <= 0) || (NvStorageFtwWorkingSize / Instance->Media.BlockSize <= 0)) {
+ DEBUG ((
+ DEBUG_ERROR,
+ "%a: NvStorageFtwWorkingSize is 0x%x, should be atleast one block size\n",
+ __FUNCTION__,
+ NvStorageFtwWorkingSize
+ ));
+ return EFI_INVALID_PARAMETER;
+ }
+
+ if ((NvStorageFtwSpareSize <= 0) || (NvStorageFtwSpareSize / Instance->Media.BlockSize <= 0)) {
+ DEBUG ((
+ DEBUG_ERROR,
+ "%a: NvStorageFtwSpareSize is 0x%x, should be atleast one block size\n",
+ __FUNCTION__,
+ NvStorageFtwSpareSize
+ ));
+ return EFI_INVALID_PARAMETER;
+ }
+
+ // Ensure the Variable area Base Addresses are aligned on a block size boundaries
+ if ((NvStorageVariableBase % Instance->Media.BlockSize != 0) ||
+ (NvStorageFtwWorkingBase % Instance->Media.BlockSize != 0) ||
+ (NvStorageFtwSpareBase % Instance->Media.BlockSize != 0))
+ {
+ DEBUG ((DEBUG_ERROR, "%a: NvStorage Base addresses must be aligned to block size boundaries", __FUNCTION__));
+ return EFI_INVALID_PARAMETER;
+ }
+
+ //
+ // 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 *)((UINTN)Headers + FirmwareVolumeHeader->HeaderLength);
+ CopyGuid (&VariableStoreHeader->Signature, &gEfiAuthenticatedVariableGuid);
+ 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 ((
+ DEBUG_INFO,
+ "%a: No Firmware Volume header present\n",
+ __FUNCTION__
+ ));
+ return EFI_NOT_FOUND;
+ }
+
+ // Check the Firmware Volume Guid
+ if ( CompareGuid (&FwVolHeader->FileSystemGuid, &gEfiSystemNvDataFvGuid) == FALSE ) {
+ DEBUG ((
+ DEBUG_INFO,
+ "%a: Firmware Volume Guid non-compatible\n",
+ __FUNCTION__
+ ));
+ return EFI_NOT_FOUND;
+ }
+
+ // Verify the header checksum
+ Checksum = CalculateSum16 ((UINT16 *)FwVolHeader, FwVolHeader->HeaderLength);
+ if (Checksum != 0) {
+ DEBUG ((
+ DEBUG_INFO,
+ "%a: FV checksum is invalid (Checksum:0x%X)\n",
+ __FUNCTION__,
+ Checksum
+ ));
+ return EFI_NOT_FOUND;
+ }
+
+ VariableStoreHeader = (VARIABLE_STORE_HEADER *)((UINTN)FwVolHeader + FwVolHeader->HeaderLength);
+
+ // Check the Variable Store Guid
+ if (!CompareGuid (&VariableStoreHeader->Signature, &gEfiVariableGuid) &&
+ !CompareGuid (&VariableStoreHeader->Signature, &gEfiAuthenticatedVariableGuid))
+ {
+ DEBUG ((
+ DEBUG_INFO,
+ "%a: Variable Store Guid non-compatible\n",
+ __FUNCTION__
+ ));
+ return EFI_NOT_FOUND;
+ }
+
+ VariableStoreLength = PcdGet32 (PcdFlashNvStorageVariableSize) - FwVolHeader->HeaderLength;
+ if (VariableStoreHeader->Size != VariableStoreLength) {
+ DEBUG ((
+ DEBUG_INFO,
+ "%a: Variable Store Length does not match\n",
+ __FUNCTION__
+ ));
+ 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 = mFlashNvStorageVariableBase;
+ 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 ((DEBUG_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 TempStatus;
+ UINTN BlockSize;
+ 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));
+
+ TempStatus = EFI_SUCCESS;
+
+ // 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 ((DEBUG_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;
+ }
+
+ // Decide if we are doing full block reads or not.
+ if (*NumBytes % BlockSize != 0) {
+ TempStatus = NorFlashRead (Instance, Instance->StartLba + Lba, Offset, *NumBytes, Buffer);
+ if (EFI_ERROR (TempStatus)) {
+ return EFI_DEVICE_ERROR;
+ }
+ } else {
+ // Read NOR Flash data into shadow buffer
+ TempStatus = NorFlashReadBlocks (Instance, Instance->StartLba + Lba, BlockSize, Buffer);
+ if (EFI_ERROR (TempStatus)) {
+ // Return one of the pre-approved error statuses
+ return EFI_DEVICE_ERROR;
+ }
+ }
+
+ return EFI_SUCCESS;
+}
+
+/**
+ 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
+ )
+{
+ NOR_FLASH_INSTANCE *Instance;
+
+ Instance = INSTANCE_FROM_FVB_THIS (This);
+
+ return NorFlashWriteSingleBlock (Instance, Instance->StartLba + Lba, Offset, NumBytes, Buffer);
+}
+
+/**
+ 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 ((DEBUG_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, UINTN);
+
+ // All blocks must be within range
+ DEBUG ((
+ DEBUG_BLKIO,
+ "FvbEraseBlocks: Check if: ( StartingLba=%ld + NumOfLba=%Lu - 1 ) > LastBlock=%ld.\n",
+ Instance->StartLba + StartingLba,
+ (UINT64)NumOfLba,
+ Instance->Media.LastBlock
+ ));
+ if ((NumOfLba == 0) || ((Instance->StartLba + StartingLba + NumOfLba - 1) > Instance->Media.LastBlock)) {
+ VA_END (Args);
+ DEBUG ((DEBUG_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, UINTN);
+
+ // 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;
+}
+
+/**
+ Fixup internal data so that EFI can be call in virtual mode.
+ Call the passed in Child Notify event and convert any pointers in
+ lib to virtual mode.
+
+ @param[in] Event The Event that is being processed
+ @param[in] Context Event Context
+**/
+VOID
+EFIAPI
+FvbVirtualNotifyEvent (
+ IN EFI_EVENT Event,
+ IN VOID *Context
+ )
+{
+ EfiConvertPointer (0x0, (VOID **)&mFlashNvStorageVariableBase);
+ return;
+}
|