/** @file NorFlashStandaloneMm.c Copyright (c) 2011 - 2021, Arm Limited. All rights reserved.
Copyright (c) 2020, Linaro, Ltd. All rights reserved.
SPDX-License-Identifier: BSD-2-Clause-Patent **/ #include #include #include #include "NorFlash.h" // // Global variable declarations // NOR_FLASH_INSTANCE **mNorFlashInstances; UINT32 mNorFlashDeviceCount; UINTN mFlashNvStorageVariableBase; 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 NULL, // Reset; NULL, // ReadBlocks NULL, // WriteBlocks NULL // 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 NULL, // ReadDisk NULL // 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 = gMmst->MmInstallProtocolInterface ( &Instance->Handle, &gEfiSmmFirmwareVolumeBlockProtocolGuid, EFI_NATIVE_INTERFACE, &Instance->FvbProtocol ); if (EFI_ERROR(Status)) { FreePool (Instance); return Status; } } else { DEBUG((DEBUG_ERROR,"standalone MM NOR Flash driver only support FVB.\n")); FreePool (Instance); return EFI_UNSUPPORTED; } *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; 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)); } 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; 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; 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; WordIndexStartLba = (mFlashNvStorageVariableBase - Instance->RegionBaseAddress) / Instance->Media.BlockSize; // 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; } } return Status; }