diff options
Diffstat (limited to 'Omap35xxPkg/Flash/Flash.c')
-rw-r--r-- | Omap35xxPkg/Flash/Flash.c | 763 |
1 files changed, 763 insertions, 0 deletions
diff --git a/Omap35xxPkg/Flash/Flash.c b/Omap35xxPkg/Flash/Flash.c new file mode 100644 index 0000000..698003b --- /dev/null +++ b/Omap35xxPkg/Flash/Flash.c @@ -0,0 +1,763 @@ +/** @file + + Copyright (c) 2008-2009, Apple Inc. All rights reserved. + + All rights reserved. This program and the accompanying materials + are licensed and made available under the terms and conditions of the BSD License + which accompanies this distribution. The full text of the license may be found at + http://opensource.org/licenses/bsd-license.php + + THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, + WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. + +**/ + +#include "Flash.h" + +NAND_PART_INFO_TABLE gNandPartInfoTable[1] = { + { 0x2C, 0xBA, 17, 11 } +}; + +NAND_FLASH_INFO *gNandFlashInfo = NULL; +UINT8 *gEccCode; +UINTN gNum512BytesChunks = 0; + +//
+// Device path for SemiHosting. It contains our autogened Caller ID GUID.
+//
+typedef struct {
+ VENDOR_DEVICE_PATH Guid;
+ EFI_DEVICE_PATH_PROTOCOL End;
+} FLASH_DEVICE_PATH;
+
+FLASH_DEVICE_PATH gDevicePath = {
+ {
+ { HARDWARE_DEVICE_PATH, HW_VENDOR_DP, sizeof (VENDOR_DEVICE_PATH), 0 },
+ EFI_CALLER_ID_GUID
+ },
+ { END_DEVICE_PATH_TYPE, END_ENTIRE_DEVICE_PATH_SUBTYPE, sizeof (EFI_DEVICE_PATH_PROTOCOL), 0}
+};
+ + +//Actual page address = Column address + Page address + Block address. +UINTN +GetActualPageAddressInBytes ( + UINTN BlockIndex, + UINTN PageIndex +) +{ + //BlockAddressStart = Start of the Block address in actual NAND + //PageAddressStart = Start of the Page address in actual NAND + return ((BlockIndex << gNandFlashInfo->BlockAddressStart) + (PageIndex << gNandFlashInfo->PageAddressStart)); +} + +VOID +NandSendCommand ( + UINT8 Command +) +{ + MmioWrite16(GPMC_NAND_COMMAND_0, Command); +} + +VOID +NandSendAddress ( + UINT8 Address +) +{ + MmioWrite16(GPMC_NAND_ADDRESS_0, Address); +} + +UINT16 +NandReadStatus ( + VOID + ) +{ + //Send READ STATUS command + NandSendCommand(READ_STATUS_CMD); + + //Read status. + return MmioRead16(GPMC_NAND_DATA_0); +} + +VOID +NandSendAddressCycles ( + UINTN Address +) +{ + //Column address + NandSendAddress(Address & 0xff); + Address >>= 8; + + //Column address + NandSendAddress(Address & 0x07); + Address >>= 3; + + //Page and Block address + NandSendAddress(Address & 0xff); + Address >>= 8; + + //Block address + NandSendAddress(Address & 0xff); + Address >>= 8; + + //Block address + NandSendAddress(Address & 0x01); +} + +VOID +GpmcInit ( + VOID + ) +{ + //Enable Smart-idle mode. + MmioWrite32(GPMC_SYSCONFIG, SMARTIDLEMODE); + + //Set IRQSTATUS and IRQENABLE to the reset value + MmioWrite32(GPMC_IRQSTATUS, 0x0); + MmioWrite32(GPMC_IRQENABLE, 0x0); + + //Disable GPMC timeout control. + MmioWrite32(GPMC_TIMEOUT_CONTROL, TIMEOUTDISABLE); + + //Set WRITEPROTECT bit to enable write access. + MmioWrite32(GPMC_CONFIG, WRITEPROTECT_HIGH); + + //NOTE: Following GPMC_CONFIGi_0 register settings are taken from u-boot memory dump. + MmioWrite32(GPMC_CONFIG1_0, DEVICETYPE_NAND | DEVICESIZE_X16); + MmioWrite32(GPMC_CONFIG2_0, CSRDOFFTIME | CSWROFFTIME); + MmioWrite32(GPMC_CONFIG3_0, ADVRDOFFTIME | ADVWROFFTIME); + MmioWrite32(GPMC_CONFIG4_0, OEONTIME | OEOFFTIME | WEONTIME | WEOFFTIME); + MmioWrite32(GPMC_CONFIG5_0, RDCYCLETIME | WRCYCLETIME | RDACCESSTIME | PAGEBURSTACCESSTIME); + MmioWrite32(GPMC_CONFIG6_0, WRACCESSTIME | WRDATAONADMUXBUS | CYCLE2CYCLEDELAY | CYCLE2CYCLESAMECSEN); + MmioWrite32(GPMC_CONFIG7_0, MASKADDRESS_128MB | CSVALID | BASEADDRESS); +} + +EFI_STATUS +NandDetectPart ( + VOID +) +{ + UINT8 NandInfo = 0; + UINT8 PartInfo[5]; + UINTN Index; + BOOLEAN Found = FALSE; + + //Send READ ID command + NandSendCommand(READ_ID_CMD); + + //Send one address cycle. + NandSendAddress(0); + + //Read 5-bytes to idenfity code programmed into the NAND flash devices. + //BYTE 0 = Manufacture ID + //Byte 1 = Device ID + //Byte 2, 3, 4 = Nand part specific information (Page size, Block size etc) + for (Index = 0; Index < sizeof(PartInfo); Index++) { + PartInfo[Index] = MmioRead16(GPMC_NAND_DATA_0); + } + + //Check if the ManufactureId and DeviceId are part of the currently supported nand parts. + for (Index = 0; Index < sizeof(gNandPartInfoTable)/sizeof(NAND_PART_INFO_TABLE); Index++) { + if (gNandPartInfoTable[Index].ManufactureId == PartInfo[0] && gNandPartInfoTable[Index].DeviceId == PartInfo[1]) { + gNandFlashInfo->BlockAddressStart = gNandPartInfoTable[Index].BlockAddressStart; + gNandFlashInfo->PageAddressStart = gNandPartInfoTable[Index].PageAddressStart; + Found = TRUE; + break; + } + } + + if (Found == FALSE) { + DEBUG ((EFI_D_ERROR, "Nand part is not currently supported. Manufacture id: %x, Device id: %x\n", PartInfo[0], PartInfo[1])); + return EFI_NOT_FOUND; + } + + //Populate NAND_FLASH_INFO based on the result of READ ID command. + gNandFlashInfo->ManufactureId = PartInfo[0]; + gNandFlashInfo->DeviceId = PartInfo[1]; + NandInfo = PartInfo[3]; + + if (PAGE_SIZE(NandInfo) == PAGE_SIZE_2K_VAL) { + gNandFlashInfo->PageSize = PAGE_SIZE_2K; + } else { + DEBUG ((EFI_D_ERROR, "Unknown Page size.\n")); + return EFI_DEVICE_ERROR; + } + + if (SPARE_AREA_SIZE(NandInfo) == SPARE_AREA_SIZE_64B_VAL) { + gNandFlashInfo->SparePageSize = SPARE_AREA_SIZE_64B; + } else { + DEBUG ((EFI_D_ERROR, "Unknown Spare area size.\n")); + return EFI_DEVICE_ERROR; + } + + if (BLOCK_SIZE(NandInfo) == BLOCK_SIZE_128K_VAL) { + gNandFlashInfo->BlockSize = BLOCK_SIZE_128K; + } else { + DEBUG ((EFI_D_ERROR, "Unknown Block size.\n")); + return EFI_DEVICE_ERROR; + } + + if (ORGANIZATION(NandInfo) == ORGANIZATION_X8) { + gNandFlashInfo->Organization = 0; + } else if (ORGANIZATION(NandInfo) == ORGANIZATION_X16) { + gNandFlashInfo->Organization = 1; + } + + //Calculate total number of blocks. + gNandFlashInfo->NumPagesPerBlock = DivU64x32(gNandFlashInfo->BlockSize, gNandFlashInfo->PageSize); + + return EFI_SUCCESS; +} + +VOID +NandConfigureEcc ( + VOID + ) +{ + //Define ECC size 0 and size 1 to 512 bytes + MmioWrite32(GPMC_ECC_SIZE_CONFIG, (ECCSIZE0_512BYTES | ECCSIZE1_512BYTES)); +} + +VOID +NandEnableEcc ( + VOID + ) +{ + //Clear all the ECC result registers and select ECC result register 1 + MmioWrite32(GPMC_ECC_CONTROL, (ECCCLEAR | ECCPOINTER_REG1)); + + //Enable ECC engine on CS0 + MmioWrite32(GPMC_ECC_CONFIG, (ECCENABLE | ECCCS_0 | ECC16B)); +} + +VOID +NandDisableEcc ( + VOID + ) +{ + //Turn off ECC engine. + MmioWrite32(GPMC_ECC_CONFIG, ECCDISABLE); +} + +VOID +NandCalculateEcc ( + VOID + ) +{ + UINTN Index; + UINTN EccResultRegister; + UINTN EccResult; + + //Capture 32-bit ECC result for each 512-bytes chunk. + //In our case PageSize is 2K so read ECC1-ECC4 result registers and + //generate total of 12-bytes of ECC code for the particular page. + + EccResultRegister = GPMC_ECC1_RESULT; + + for (Index = 0; Index < gNum512BytesChunks; Index++) { + + EccResult = MmioRead32(EccResultRegister); + + //Calculate ECC code from 32-bit ECC result value. + //NOTE: Following calculation is not part of TRM. We got this information + //from Beagleboard mailing list. + gEccCode[Index * 3] = EccResult & 0xFF; + gEccCode[(Index * 3) + 1] = (EccResult >> 16) & 0xFF; + gEccCode[(Index * 3) + 2] = (((EccResult >> 20) & 0xF0) | ((EccResult >> 8) & 0x0F)); + + //Point to next ECC result register. + EccResultRegister += 4; + } +} + +EFI_STATUS +NandReadPage ( + IN UINTN BlockIndex, + IN UINTN PageIndex, + OUT VOID *Buffer, + OUT UINT8 *SpareBuffer +) +{ + UINTN Address; + UINTN Index; + UINTN NumMainAreaWords = (gNandFlashInfo->PageSize/2); + UINTN NumSpareAreaWords = (gNandFlashInfo->SparePageSize/2); + UINT16 *MainAreaWordBuffer = Buffer; + UINT16 *SpareAreaWordBuffer = (UINT16 *)SpareBuffer; + UINTN Timeout = MAX_RETRY_COUNT; + + //Generate device address in bytes to access specific block and page index + Address = GetActualPageAddressInBytes(BlockIndex, PageIndex); + + //Send READ command + NandSendCommand(PAGE_READ_CMD); + + //Send 5 Address cycles to access specific device address + NandSendAddressCycles(Address); + + //Send READ CONFIRM command + NandSendCommand(PAGE_READ_CONFIRM_CMD); + + //Poll till device is busy. + while (Timeout) { + if ((NandReadStatus() & NAND_READY) == NAND_READY) { + break; + } + Timeout--; + } + + if (Timeout == 0) { + DEBUG ((EFI_D_ERROR, "Read page timed out.\n")); + return EFI_TIMEOUT; + } + + //Reissue READ command + NandSendCommand(PAGE_READ_CMD); + + //Enable ECC engine. + NandEnableEcc(); + + //Read data into the buffer. + for (Index = 0; Index < NumMainAreaWords; Index++) { + *MainAreaWordBuffer++ = MmioRead16(GPMC_NAND_DATA_0); + } + + //Read spare area into the buffer. + for (Index = 0; Index < NumSpareAreaWords; Index++) { + *SpareAreaWordBuffer++ = MmioRead16(GPMC_NAND_DATA_0); + } + + //Calculate ECC. + NandCalculateEcc(); + + //Turn off ECC engine. + NandDisableEcc(); + + //Perform ECC correction. + //Need to implement.. + + return EFI_SUCCESS; +} + +EFI_STATUS +NandWritePage ( + IN UINTN BlockIndex, + IN UINTN PageIndex, + OUT VOID *Buffer, + IN UINT8 *SpareBuffer +) +{ + UINTN Address; + UINT16 *MainAreaWordBuffer = Buffer; + UINT16 *SpareAreaWordBuffer = (UINT16 *)SpareBuffer; + UINTN Index; + UINTN NandStatus; + UINTN Timeout = MAX_RETRY_COUNT; + + //Generate device address in bytes to access specific block and page index + Address = GetActualPageAddressInBytes(BlockIndex, PageIndex); + + //Send SERIAL DATA INPUT command + NandSendCommand(PROGRAM_PAGE_CMD); + + //Send 5 Address cycles to access specific device address + NandSendAddressCycles(Address); + + //Enable ECC engine. + NandEnableEcc(); + + //Data input from Buffer + for (Index = 0; Index < (gNandFlashInfo->PageSize/2); Index++) { + MmioWrite16(GPMC_NAND_DATA_0, *MainAreaWordBuffer++); + + //After each write access, device has to wait to accept data. + //Currently we may not be programming proper timing parameters to + //the GPMC_CONFIGi_0 registers and we would need to figure that out. + //Without following delay, page programming fails. + gBS->Stall(1); + } + + //Calculate ECC. + NandCalculateEcc(); + + //Turn off ECC engine. + NandDisableEcc(); + + //Prepare Spare area buffer with ECC codes. + SetMem(SpareBuffer, gNandFlashInfo->SparePageSize, 0xFF); + CopyMem(&SpareBuffer[ECC_POSITION], gEccCode, gNum512BytesChunks * 3); + + //Program spare area with calculated ECC. + for (Index = 0; Index < (gNandFlashInfo->SparePageSize/2); Index++) { + MmioWrite16(GPMC_NAND_DATA_0, *SpareAreaWordBuffer++); + } + + //Send PROGRAM command + NandSendCommand(PROGRAM_PAGE_CONFIRM_CMD); + + //Poll till device is busy. + while (Timeout) { + NandStatus = NandReadStatus(); + if ((NandStatus & NAND_READY) == NAND_READY) { + break; + } + Timeout--; + } + + if (Timeout == 0) { + DEBUG ((EFI_D_ERROR, "Program page timed out.\n")); + return EFI_TIMEOUT; + } + + //Bit0 indicates Pass/Fail status + if (NandStatus & NAND_FAILURE) { + return EFI_DEVICE_ERROR; + } + + return EFI_SUCCESS; +} + +EFI_STATUS +NandEraseBlock ( + IN UINTN BlockIndex +) +{ + UINTN Address; + UINTN NandStatus; + UINTN Timeout = MAX_RETRY_COUNT; + + //Generate device address in bytes to access specific block and page index + Address = GetActualPageAddressInBytes(BlockIndex, 0); + + //Send ERASE SETUP command + NandSendCommand(BLOCK_ERASE_CMD); + + //Send 3 address cycles to device to access Page address and Block address + Address >>= 11; //Ignore column addresses + + NandSendAddress(Address & 0xff); + Address >>= 8; + + NandSendAddress(Address & 0xff); + Address >>= 8; + + NandSendAddress(Address & 0xff); + + //Send ERASE CONFIRM command + NandSendCommand(BLOCK_ERASE_CONFIRM_CMD); + + //Poll till device is busy. + while (Timeout) { + NandStatus = NandReadStatus(); + if ((NandStatus & NAND_READY) == NAND_READY) { + break; + } + Timeout--; + gBS->Stall(1); + } + + if (Timeout == 0) { + DEBUG ((EFI_D_ERROR, "Erase block timed out for Block: %d.\n", BlockIndex)); + return EFI_TIMEOUT; + } + + //Bit0 indicates Pass/Fail status + if (NandStatus & NAND_FAILURE) { + return EFI_DEVICE_ERROR; + } + + return EFI_SUCCESS; +} + +EFI_STATUS +NandReadBlock ( + IN UINTN StartBlockIndex, + IN UINTN EndBlockIndex, + OUT VOID *Buffer, + OUT VOID *SpareBuffer +) +{ + UINTN BlockIndex; + UINTN PageIndex; + EFI_STATUS Status = EFI_SUCCESS; + + for (BlockIndex = StartBlockIndex; BlockIndex <= EndBlockIndex; BlockIndex++) { + //For each block read number of pages + for (PageIndex = 0; PageIndex < gNandFlashInfo->NumPagesPerBlock; PageIndex++) { + Status = NandReadPage(BlockIndex, PageIndex, Buffer, SpareBuffer); + if (EFI_ERROR(Status)) { + return Status; + } + Buffer = ((UINT8 *)Buffer + gNandFlashInfo->PageSize); + } + } + + return Status; +} + +EFI_STATUS +NandWriteBlock ( + IN UINTN StartBlockIndex, + IN UINTN EndBlockIndex, + OUT VOID *Buffer, + OUT VOID *SpareBuffer + ) +{ + UINTN BlockIndex; + UINTN PageIndex; + EFI_STATUS Status = EFI_SUCCESS; + + for (BlockIndex = StartBlockIndex; BlockIndex <= EndBlockIndex; BlockIndex++) { + //Page programming. + for (PageIndex = 0; PageIndex < gNandFlashInfo->NumPagesPerBlock; PageIndex++) { + Status = NandWritePage(BlockIndex, PageIndex, Buffer, SpareBuffer); + if (EFI_ERROR(Status)) { + return Status; + } + Buffer = ((UINT8 *)Buffer + gNandFlashInfo->PageSize); + } + } + + return Status; +} + +EFI_STATUS +EFIAPI +NandFlashReset ( + IN EFI_BLOCK_IO_PROTOCOL *This, + IN BOOLEAN ExtendedVerification + ) +{ + UINTN BusyStall = 50; // microSeconds + UINTN ResetBusyTimeout = (1000000 / BusyStall); // 1 Second + + //Send RESET command to device. + NandSendCommand(RESET_CMD); + + //Wait for 1ms before we check status register. + gBS->Stall(1000); + + //Check BIT#5 & BIT#6 in Status register to make sure RESET is done. + while ((NandReadStatus() & NAND_RESET_STATUS) != NAND_RESET_STATUS) { + + //In case of extended verification, wait for extended amount of time + //to make sure device is reset. + if (ExtendedVerification) { + if (ResetBusyTimeout == 0) { + return EFI_DEVICE_ERROR; + } + + gBS->Stall(BusyStall); + ResetBusyTimeout--; + } + } + + return EFI_SUCCESS; +} + +EFI_STATUS +EFIAPI +NandFlashReadBlocks ( + IN EFI_BLOCK_IO_PROTOCOL *This, + IN UINT32 MediaId, + IN EFI_LBA Lba, + IN UINTN BufferSize, + OUT VOID *Buffer + ) +{ + UINTN NumBlocks; + UINTN EndBlockIndex; + EFI_STATUS Status; + UINT8 *SpareBuffer = NULL; + + if (Buffer == NULL) { + Status = EFI_INVALID_PARAMETER; + goto exit; + } + + if (Lba > LAST_BLOCK) { + Status = EFI_INVALID_PARAMETER; + goto exit; + } + + if ((BufferSize % gNandFlashInfo->BlockSize) != 0) { + Status = EFI_BAD_BUFFER_SIZE; + goto exit; + } + + NumBlocks = DivU64x32(BufferSize, gNandFlashInfo->BlockSize); + EndBlockIndex = ((UINTN)Lba + NumBlocks) - 1; + + SpareBuffer = (UINT8 *)AllocatePool(gNandFlashInfo->SparePageSize); + if (SpareBuffer == NULL) { + Status = EFI_OUT_OF_RESOURCES; + goto exit; + } + + //Read block + Status = NandReadBlock((UINTN)Lba, EndBlockIndex, Buffer, SpareBuffer); + if (EFI_ERROR(Status)) { + DEBUG((EFI_D_ERROR, "Read block fails: %x\n", Status)); + goto exit; + } + +exit: + if (SpareBuffer != NULL) { + FreePool (SpareBuffer); + } + + return Status; +} + +EFI_STATUS +EFIAPI +NandFlashWriteBlocks ( + IN EFI_BLOCK_IO_PROTOCOL *This, + IN UINT32 MediaId, + IN EFI_LBA Lba, + IN UINTN BufferSize, + IN VOID *Buffer + ) +{ + UINTN BlockIndex; + UINTN NumBlocks; + UINTN EndBlockIndex; + EFI_STATUS Status; + UINT8 *SpareBuffer = NULL; + + if (Buffer == NULL) { + Status = EFI_INVALID_PARAMETER; + goto exit; + } + + if (Lba > LAST_BLOCK) { + Status = EFI_INVALID_PARAMETER; + goto exit; + } + + if ((BufferSize % gNandFlashInfo->BlockSize) != 0) { + Status = EFI_BAD_BUFFER_SIZE; + goto exit; + } + + NumBlocks = DivU64x32(BufferSize, gNandFlashInfo->BlockSize); + EndBlockIndex = ((UINTN)Lba + NumBlocks) - 1; + + SpareBuffer = (UINT8 *)AllocatePool(gNandFlashInfo->SparePageSize); + if (SpareBuffer == NULL) { + Status = EFI_OUT_OF_RESOURCES; + goto exit; + } + + // Erase block + for (BlockIndex = (UINTN)Lba; BlockIndex <= EndBlockIndex; BlockIndex++) { + Status = NandEraseBlock(BlockIndex); + if (EFI_ERROR(Status)) { + DEBUG((EFI_D_ERROR, "Erase block failed. Status: %x\n", Status)); + goto exit; + } + } + + // Program data + Status = NandWriteBlock((UINTN)Lba, EndBlockIndex, Buffer, SpareBuffer); + if (EFI_ERROR(Status)) { + DEBUG((EFI_D_ERROR, "Block write fails: %x\n", Status)); + goto exit; + } + +exit: + if (SpareBuffer != NULL) { + FreePool (SpareBuffer); + } + + return Status; +} + +EFI_STATUS +EFIAPI +NandFlashFlushBlocks ( + IN EFI_BLOCK_IO_PROTOCOL *This + ) +{ + return EFI_SUCCESS; +} + + + +EFI_BLOCK_IO_MEDIA gNandFlashMedia = { + SIGNATURE_32('n','a','n','d'), // MediaId + FALSE, // RemovableMedia + TRUE, // MediaPresent + FALSE, // LogicalPartition + FALSE, // ReadOnly + FALSE, // WriteCaching + 0, // BlockSize + 2, // IoAlign + 0, // Pad + 0 // LastBlock +}; + +EFI_BLOCK_IO_PROTOCOL BlockIo = +{ + EFI_BLOCK_IO_INTERFACE_REVISION, // Revision + &gNandFlashMedia, // *Media + NandFlashReset, // Reset + NandFlashReadBlocks, // ReadBlocks + NandFlashWriteBlocks, // WriteBlocks + NandFlashFlushBlocks // FlushBlocks +}; + +EFI_STATUS +NandFlashInitialize ( + IN EFI_HANDLE ImageHandle, + IN EFI_SYSTEM_TABLE *SystemTable + ) +{ + EFI_STATUS Status; + + gNandFlashInfo = (NAND_FLASH_INFO *)AllocateZeroPool (sizeof(NAND_FLASH_INFO)); + + //Initialize GPMC module. + GpmcInit(); + + //Reset NAND part + NandFlashReset(&BlockIo, FALSE); + + //Detect NAND part and populate gNandFlashInfo structure + Status = NandDetectPart (); + if (EFI_ERROR(Status)) { + DEBUG((EFI_D_ERROR, "Nand part id detection failure: Status: %x\n", Status)); + return Status; + } + + //Count total number of 512Bytes chunk based on the page size. + if (gNandFlashInfo->PageSize == PAGE_SIZE_512B) { + gNum512BytesChunks = 1; + } else if (gNandFlashInfo->PageSize == PAGE_SIZE_2K) { + gNum512BytesChunks = 4; + } else if (gNandFlashInfo->PageSize == PAGE_SIZE_4K) { + gNum512BytesChunks = 8; + } + + gEccCode = (UINT8 *)AllocatePool(gNum512BytesChunks * 3); + if (gEccCode == NULL) { + return EFI_OUT_OF_RESOURCES; + } + + //Configure ECC + NandConfigureEcc (); + + //Patch EFI_BLOCK_IO_MEDIA structure. + gNandFlashMedia.BlockSize = gNandFlashInfo->BlockSize; + gNandFlashMedia.LastBlock = LAST_BLOCK; + + //Publish BlockIO. + Status = gBS->InstallMultipleProtocolInterfaces ( + &ImageHandle, + &gEfiBlockIoProtocolGuid, &BlockIo, + &gEfiDevicePathProtocolGuid, &gDevicePath, + NULL + ); + return Status; +} + |