/** @file
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Update the patched PCDs to their correct value
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Copyright (c) 2020, Linaro Ltd. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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/**
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* Patch the relevant PCDs of the RPMB driver with the correct address of the
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* allocated memory
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*
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**/
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#include <Library/BaseLib.h>
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#include <Library/DebugLib.h>
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#include <Library/MmServicesTableLib.h>
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#include <Library/PcdLib.h>
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#include <Protocol/FirmwareVolumeBlock.h>
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#include <Protocol/SmmFirmwareVolumeBlock.h>
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#include "OpTeeRpmbFvb.h"
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/**
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Fixup the Pcd values for variable storage
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Since the upper layers of EDK2 expect a memory mapped interface and we can't
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offer that from an RPMB, the driver allocates memory on init and passes that
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on the upper layers. Since the memory is dynamically allocated and we can't set the
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PCD in StMM context, we need to patch it correctly on each access
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@retval EFI_SUCCESS Protocol was found and PCDs patched up
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@retval EFI_INVALID_PARAMETER Invalid parameter
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@retval EFI_NOT_FOUND Protocol interface not found
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**/
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EFI_STATUS
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EFIAPI
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FixPcdMemory (
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VOID
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)
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{
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EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL *FvbProtocol;
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MEM_INSTANCE *Instance;
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EFI_STATUS Status;
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//
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// Locate SmmFirmwareVolumeBlockProtocol
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//
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Status = gMmst->MmLocateProtocol (
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&gEfiSmmFirmwareVolumeBlockProtocolGuid,
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NULL,
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(VOID **) &FvbProtocol
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);
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ASSERT_EFI_ERROR (Status);
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Instance = INSTANCE_FROM_FVB_THIS (FvbProtocol);
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// Patch PCDs with the correct values
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PatchPcdSet64 (PcdFlashNvStorageVariableBase64, Instance->MemBaseAddress);
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PatchPcdSet64 (
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PcdFlashNvStorageFtwWorkingBase64,
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Instance->MemBaseAddress + PcdGet32 (PcdFlashNvStorageVariableSize)
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);
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PatchPcdSet64 (
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PcdFlashNvStorageFtwSpareBase64,
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Instance->MemBaseAddress +
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PcdGet32 (PcdFlashNvStorageVariableSize) +
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PcdGet32 (PcdFlashNvStorageFtwWorkingSize)
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);
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DEBUG ((DEBUG_INFO, "%a: Fixup PcdFlashNvStorageVariableBase64: 0x%lx\n",
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__FUNCTION__, PcdGet64 (PcdFlashNvStorageVariableBase64)));
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DEBUG ((DEBUG_INFO, "%a: Fixup PcdFlashNvStorageFtwWorkingBase64: 0x%lx\n",
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__FUNCTION__, PcdGet64 (PcdFlashNvStorageFtwWorkingBase64)));
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DEBUG ((DEBUG_INFO, "%a: Fixup PcdFlashNvStorageFtwSpareBase64: 0x%lx\n",
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__FUNCTION__, PcdGet64 (PcdFlashNvStorageFtwSpareBase64)));
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return Status;
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}
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