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/** @file
Platform Flash Access library.
Copyright (c) 2016, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/
#include <PiDxe.h>
#include <Library/BaseLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/DebugLib.h>
#include <Library/PcdLib.h>
#include <Library/PlatformFlashAccessLib.h>
#include <Library/FlashDeviceLib.h>
#include <Library/MemoryAllocationLib.h>
#define SECTOR_SIZE_64KB 0x10000 // Common 64kBytes sector size
#define ALINGED_SIZE SECTOR_SIZE_64KB
STATIC EFI_PHYSICAL_ADDRESS mInternalFdAddress;
/**
Perform flash write opreation.
@param[in] FirmwareType The type of firmware.
@param[in] FlashAddress The address of flash device to be accessed.
@param[in] FlashAddressType The type of flash device address.
@param[in] Buffer The pointer to the data buffer.
@param[in] Length The length of data buffer in bytes.
@retval EFI_SUCCESS The operation returns successfully.
@retval EFI_WRITE_PROTECTED The flash device is read only.
@retval EFI_UNSUPPORTED The flash device access is unsupported.
@retval EFI_INVALID_PARAMETER The input parameter is not valid.
**/
EFI_STATUS
EFIAPI
PerformFlashWrite (
IN PLATFORM_FIRMWARE_TYPE FirmwareType,
IN EFI_PHYSICAL_ADDRESS FlashAddress,
IN FLASH_ADDRESS_TYPE FlashAddressType,
IN VOID *Buffer,
IN UINTN Length
)
{
EFI_STATUS Status;
DEBUG((DEBUG_INFO, "PerformFlashWrite - 0x%x(%x) - 0x%x\n", (UINTN)FlashAddress, (UINTN)FlashAddressType, Length));
if (FlashAddressType == FlashAddressTypeRelativeAddress) {
FlashAddress = FlashAddress + mInternalFdAddress;
}
DEBUG((DEBUG_INFO, " - 0x%x(%x) - 0x%x\n", (UINTN)FlashAddress, (UINTN)FlashAddressType, Length));
LibFvbFlashDeviceBlockLock(FlashAddress, Length, FALSE);
//
// Erase & Write
//
Status = LibFvbFlashDeviceBlockErase((UINTN)FlashAddress, Length);
ASSERT_EFI_ERROR(Status);
if (EFI_ERROR(Status)) {
LibFvbFlashDeviceBlockLock(FlashAddress, Length, TRUE);
DEBUG((DEBUG_ERROR, "Flash Erase error\n"));
return Status;
}
Status = LibFvbFlashDeviceWrite((UINTN)FlashAddress, &Length, Buffer);
ASSERT_EFI_ERROR(Status);
if (EFI_ERROR(Status)) {
LibFvbFlashDeviceBlockLock(FlashAddress, Length, TRUE);
DEBUG((DEBUG_ERROR, "Flash write error\n"));
return Status;
}
LibFvbFlashDeviceBlockLock(FlashAddress, Length, TRUE);
return EFI_SUCCESS;
}
/**
Perform microcode write opreation.
@param[in] FlashAddress The address of flash device to be accessed.
@param[in] Buffer The pointer to the data buffer.
@param[in] Length The length of data buffer in bytes.
@retval EFI_SUCCESS The operation returns successfully.
@retval EFI_WRITE_PROTECTED The flash device is read only.
@retval EFI_UNSUPPORTED The flash device access is unsupported.
@retval EFI_INVALID_PARAMETER The input parameter is not valid.
**/
EFI_STATUS
EFIAPI
MicrocodeFlashWrite (
IN EFI_PHYSICAL_ADDRESS FlashAddress,
IN VOID *Buffer,
IN UINTN Length
)
{
EFI_PHYSICAL_ADDRESS AlignedFlashAddress;
VOID *AlignedBuffer;
UINTN AlignedLength;
UINTN OffsetHead;
UINTN OffsetTail;
EFI_STATUS Status;
DEBUG((DEBUG_INFO, "MicrocodeFlashWrite - 0x%x - 0x%x\n", (UINTN)FlashAddress, Length));
//
// Need make buffer 64K aligned to support ERASE
//
// [Aligned] FlashAddress [Aligned]
// | | |
// V V V
// +--------------+========+------------+
// | OffsetHeader | Length | OffsetTail |
// +--------------+========+------------+
// ^
// |<-----------AlignedLength----------->
// |
// AlignedFlashAddress
//
OffsetHead = FlashAddress & (ALINGED_SIZE - 1);
OffsetTail = (FlashAddress + Length) & (ALINGED_SIZE - 1);
if (OffsetTail != 0) {
OffsetTail = ALINGED_SIZE - OffsetTail;
}
if ((OffsetHead != 0) || (OffsetTail != 0)) {
AlignedFlashAddress = FlashAddress - OffsetHead;
AlignedLength = Length + OffsetHead + OffsetTail;
AlignedBuffer = AllocatePool(AlignedLength);
if (AlignedBuffer == NULL) {
return EFI_OUT_OF_RESOURCES;
}
//
// Save original buffer
//
if (OffsetHead != 0) {
CopyMem((UINT8 *)AlignedBuffer, (VOID *)AlignedFlashAddress, OffsetHead);
}
if (OffsetTail != 0) {
CopyMem((UINT8 *)AlignedBuffer + OffsetHead + Length, (VOID *)(AlignedFlashAddress + OffsetHead + Length), OffsetTail);
}
//
// Override new buffer
//
CopyMem((UINT8 *)AlignedBuffer + OffsetHead, Buffer, Length);
} else {
AlignedFlashAddress = FlashAddress;
AlignedBuffer = Buffer;
AlignedLength = Length;
}
Status = PerformFlashWrite(
PlatformFirmwareTypeSystemFirmware,
AlignedFlashAddress,
FlashAddressTypeAbsoluteAddress,
AlignedBuffer,
AlignedLength
);
if ((OffsetHead != 0) || (OffsetTail != 0)) {
FreePool (AlignedBuffer);
}
return Status;
}
/**
Platform Flash Access Lib Constructor.
**/
EFI_STATUS
EFIAPI
PerformFlashAccessLibConstructor (
VOID
)
{
mInternalFdAddress = (EFI_PHYSICAL_ADDRESS)(UINTN)PcdGet32(PcdFlashAreaBaseAddress);
DEBUG((DEBUG_INFO, "PcdFlashAreaBaseAddress - 0x%x\n", mInternalFdAddress));
return EFI_SUCCESS;
}
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