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+/** @file
+ Platform flash device access library for AMD Styx
+
+ Copyright (c) 2017, Linaro, Ltd. 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/BaseMemoryLib.h>
+#include <Library/DebugLib.h>
+#include <Library/PlatformFlashAccessLib.h>
+#include <Library/UefiBootServicesTableLib.h>
+
+#include <Protocol/AmdIscpDxeProtocol.h>
+
+STATIC CONST UINT64 mFlashOffset = FixedPcdGet64 (PcdFvBaseAddress) -
+ FixedPcdGet64 (PcdFdBaseAddress);
+STATIC CONST UINT64 mFlashMaxSize = FixedPcdGet64 (PcdFvSize);
+
+STATIC CONST UINTN mBlockSize = SIZE_64KB;
+
+/**
+ Perform flash write operation.
+
+ @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;
+ AMD_ISCP_DXE_PROTOCOL *IscpDxeProtocol;
+
+ if (FlashAddressType != FlashAddressTypeRelativeAddress) {
+ DEBUG ((DEBUG_ERROR, "%a: only FlashAddressTypeRelativeAddress supported\n",
+ __FUNCTION__));
+
+ return EFI_INVALID_PARAMETER;
+ }
+
+ if (FirmwareType != PlatformFirmwareTypeSystemFirmware) {
+ DEBUG ((DEBUG_ERROR,
+ "%a: only PlatformFirmwareTypeSystemFirmware supported\n",
+ __FUNCTION__));
+
+ return EFI_INVALID_PARAMETER;
+ }
+
+ if ((FlashAddress % mBlockSize) != 0 || (Length % mBlockSize) != 0) {
+ DEBUG ((DEBUG_ERROR,
+ "%a:region [0x%lx, 0x%lx) is not a multiple of the blocksize 0x%lx\n",
+ __FUNCTION__, FlashAddress, Length, mBlockSize));
+ return EFI_INVALID_PARAMETER;
+ }
+
+ if (FlashAddress < mFlashOffset ||
+ (FlashAddress + Length) > (mFlashOffset + mFlashMaxSize)) {
+ DEBUG ((DEBUG_ERROR,
+ "%a: updated region [0x%lx, 0x%lx) outside of FV region [0x%lx, 0x%lx)\n",
+ __FUNCTION__, FlashAddress, FlashAddress + Length, mFlashOffset,
+ mFlashOffset + mFlashMaxSize));
+ return EFI_INVALID_PARAMETER;
+ }
+
+ Status = gBS->LocateProtocol (&gAmdIscpDxeProtocolGuid, NULL,
+ (VOID **)&IscpDxeProtocol);
+ ASSERT_EFI_ERROR (Status);
+
+ while (Length > 0) {
+ //
+ // Erase the block
+ //
+ DEBUG ((DEBUG_INFO, "%a: erasing 0x%llx bytes at address 0x%llx\n",
+ __FUNCTION__, mBlockSize, FlashAddress));
+
+ Status = IscpDxeProtocol->AmdExecuteEraseFvBlockDxe (IscpDxeProtocol,
+ FlashAddress, mBlockSize);
+ if (EFI_ERROR (Status)) {
+ DEBUG ((DEBUG_ERROR, "%a: AmdExecuteEraseFvBlockDxe () failed - %r\n",
+ __FUNCTION__, Status));
+ }
+
+ //
+ // Write the new data
+ //
+ DEBUG ((DEBUG_INFO, "%a: writing 0x%llx bytes at at address 0x%llx\\n",
+ __FUNCTION__, mBlockSize, FlashAddress));
+
+ Status = IscpDxeProtocol->AmdExecuteUpdateFvBlockDxe (IscpDxeProtocol,
+ FlashAddress, Buffer, mBlockSize);
+
+ if (EFI_ERROR (Status)) {
+ DEBUG ((DEBUG_ERROR,
+ "%a: write of block address 0x%lx failed - %r\n",
+ __FUNCTION__, FlashAddress, Status));
+ }
+
+ FlashAddress += mBlockSize;
+ Buffer += mBlockSize;
+ Length -= mBlockSize;
+ }
+
+ return EFI_SUCCESS;
+}
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+## @file
+# Platform flash device access library.
+#
+# Copyright (c) 2017, Linaro, Ltd. 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.
+#
+##
+
+[Defines]
+ INF_VERSION = 0x00010019
+ BASE_NAME = StyxPlatformFlashAccessLib
+ FILE_GUID = 3fd08c10-07de-4851-a891-acaeea5055f8
+ MODULE_TYPE = BASE
+ VERSION_STRING = 1.0
+ LIBRARY_CLASS = PlatformFlashAccessLib|DXE_DRIVER
+
+[Sources]
+ StyxPlatformFlashAccessLib.c
+
+[Packages]
+ ArmPkg/ArmPkg.dec
+ MdePkg/MdePkg.dec
+ SignedCapsulePkg/SignedCapsulePkg.dec
+ Silicon/AMD/Styx/AmdModulePkg/AmdModulePkg.dec
+
+[LibraryClasses]
+ BaseMemoryLib
+ DebugLib
+ UefiBootServicesTableLib
+
+[Protocols]
+ gAmdIscpDxeProtocolGuid ## CONSUMES
+
+[FixedPcd]
+ gArmTokenSpaceGuid.PcdFdBaseAddress
+ gArmTokenSpaceGuid.PcdFvBaseAddress
+ gArmTokenSpaceGuid.PcdFvSize
+
+[Depex]
+ gAmdIscpDxeProtocolGuid
In preparation of adding capsule support to the AMD Styx aka Seattle based platforms, implement a PlatformFlashAccessLib instance that invokes the ISCP to update the FV containing our UEFI image. Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> --- Silicon/AMD/Styx/Library/StyxPlatformFlashAccessLib/StyxPlatformFlashAccessLib.c | 128 ++++++++++++++++++++ Silicon/AMD/Styx/Library/StyxPlatformFlashAccessLib/StyxPlatformFlashAccessLib.inf | 47 +++++++ 2 files changed, 175 insertions(+) -- 2.11.0 _______________________________________________ edk2-devel mailing list edk2-devel@lists.01.org https://lists.01.org/mailman/listinfo/edk2-devel