/** @file Implementation of Fsp Misc UPD Initialization. Copyright (c) 2019 - 2021, Intel Corporation. All rights reserved.
SPDX-License-Identifier: BSD-2-Clause-Patent **/ #include #include #include #include #include #include #include #include #include #include #include #include #include /** Performs FSP Misc UPD initialization. @param[in][out] FspmUpd Pointer to FSPM_UPD Data. @retval EFI_SUCCESS FSP UPD Data is updated. **/ EFI_STATUS EFIAPI PeiFspMiscUpdUpdatePreMem ( IN OUT FSPM_UPD *FspmUpd ) { EFI_STATUS Status; EFI_BOOT_MODE BootMode; UINTN VariableSize; VOID *FspNvsBufferPtr; UINT8 MorControl; VOID *MorControlPtr; Status = PeiServicesGetBootMode (&BootMode); ASSERT_EFI_ERROR (Status); // // Initialize S3 Data variable (S3DataPtr). It may be used for warm and fast boot paths. // FspNvsBufferPtr = NULL; VariableSize = 0; Status = PeiGetLargeVariable (L"FspNvsBuffer", &gFspNvsBufferVariableGuid, &FspNvsBufferPtr, &VariableSize); if (Status == EFI_SUCCESS) { DEBUG ((DEBUG_INFO, "Get L\"FspNvsBuffer\" gFspNvsBufferVariableGuid - %r\n", Status)); DEBUG ((DEBUG_INFO, "FspNvsBuffer Size - 0x%x\n", VariableSize)); FspmUpd->FspmArchUpd.NvsBufferPtr = FspNvsBufferPtr; } if (FspmUpd->FspmArchUpd.NvsBufferPtr != NULL) { // // Set the DISB bit in PCH (DRAM Initialization Scratchpad Bit - GEN_PMCON_A[23]), // after memory Data is saved to NVRAM. // PciOr32 ((UINTN)PCI_LIB_ADDRESS (0, PCI_DEVICE_NUMBER_PCH_PMC, PCI_FUNCTION_NUMBER_PCH_PMC, R_PCH_PMC_GEN_PMCON_A), B_PCH_PMC_GEN_PMCON_A_DISB); } // // MOR // MorControl = 0; MorControlPtr = &MorControl; VariableSize = sizeof (MorControl); Status = PeiGetVariable ( MEMORY_OVERWRITE_REQUEST_VARIABLE_NAME, &gEfiMemoryOverwriteControlDataGuid, &MorControlPtr, &VariableSize ); DEBUG ((DEBUG_INFO, "MorControl - 0x%x (%r)\n", MorControl, Status)); // // Do not set CleanMemory on S3 resume // TODO: Handle advanced features later - capsule update is in-memory list // if (MOR_CLEAR_MEMORY_VALUE (MorControl) && BootMode != BOOT_ON_S3_RESUME) { FspmUpd->FspmConfig.CleanMemory = (BOOLEAN)(MorControl & MOR_CLEAR_MEMORY_BIT_MASK); } return EFI_SUCCESS; }