/** @file
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EFI PEIM for Emulation Platform Initial
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@copyright
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Copyright 2017 - 2021 Intel Corporation. <BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#include <Library/DebugLib.h>
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#include <Library/BaseLib.h>
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#include <Library/BaseMemoryLib.h>
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#include <Library/IoLib.h>
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#include <Library/PciLib.h>
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#include <Library/HobLib.h>
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#include <Library/PeiServicesLib.h>
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#include <Ppi/ReadOnlyVariable2.h>
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#include <Library/EmulationConfigurationLib.h>
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#include <EmulationConfiguration.h>
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#include <Guid/EmulationDfxVariable.h>
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#include <PlatformHost.h>
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#include <Cpu/CpuIds.h>
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EFI_PEI_PPI_DESCRIPTOR mPpiListEmulation = {
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(EFI_PEI_PPI_DESCRIPTOR_PPI | EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST),
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&gEmulationHobGuid,
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NULL
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};
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#define CSR_EMULATION_FLAG_OFFSET 0xFC
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EFI_STATUS
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EFIAPI
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EmulationPlatformInitEntry (
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IN EFI_PEI_FILE_HANDLE FileHandle,
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IN CONST EFI_PEI_SERVICES **PeiServices
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)
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{
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EFI_STATUS Status;
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EFI_PEI_READ_ONLY_VARIABLE2_PPI *PeiVariable;
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EMULATION_DFX_CONFIGURATION EmulationVariable;
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UINTN BufferSize = sizeof(EMULATION_DFX_CONFIGURATION);
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EMULATION_SETTING *EmulationSetting;
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UINT32 RegEax;
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UINT16 CpuFamily;
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UINTN PciLibAddress;
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UINT32 EmulationType;
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//
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// Build the Emulation Hob
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//
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EmulationSetting = BuildGuidHob (&gEmulationHobGuid, sizeof (EMULATION_SETTING));
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if (EmulationSetting == NULL) {
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DEBUG((EFI_D_ERROR, "Emulation BuildGuidDataHob fail!\n"));
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return EFI_OUT_OF_RESOURCES;
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}
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EmulationSetting->UbiosGenerationSetting = EMULATION_DISABLE;
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EmulationSetting->HybridSystemLevelEmulationSetting = EMULATION_DISABLE;
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EmulationSetting->UbiosOutputMode = ASM_OUTPUT_ENABLE;
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EmulationSetting->LoopBackLabelNumber = 0;
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EmulationSetting->FnvAccessValue = FNV_ACCESS_DISABLE;
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EmulationSetting->MsrTraceEnable = MSR_OUTPUT_DISABLE;
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//
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// Store variable into the hob.
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//
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(*PeiServices)->LocatePpi (
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PeiServices,
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&gEfiPeiReadOnlyVariable2PpiGuid,
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0,
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NULL,
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&PeiVariable
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);
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Status = PeiVariable->GetVariable (PeiVariable, EMULATION_DFX_CONFIGURATION_NAME, &gEmulationDfxVariableGuid, NULL, &BufferSize, &EmulationVariable);
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DEBUG ((DEBUG_INFO, "Emulation GetVariable status = %r !\n", Status));
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if (EFI_ERROR (Status)) {
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return EFI_NOT_FOUND;
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}
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EmulationSetting->UbiosGenerationSetting = EmulationVariable.DfxUbiosGeneration;
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EmulationSetting->HybridSystemLevelEmulationSetting = EmulationVariable.DfxHybridSystemLevelEmulation;
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EmulationSetting->MsrTraceEnable = EmulationVariable.DfxPmMsrTrace;
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//
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// Check the override value
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//
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AsmCpuid (1, &RegEax, NULL, NULL, NULL);
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CpuFamily = (UINT16) (RegEax >> 4);
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if (CpuFamily == CPU_FAMILY_SKX) {
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//
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// Simics flag is at B0:D0:F0 offset 0xFC for SKX.
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//
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PciLibAddress = PCI_LIB_ADDRESS(0, 0, 0, CSR_EMULATION_FLAG_OFFSET);
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} else {
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//
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// Simics flag is at B0:D3:F0 offset 0xFC for 10nm.
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//
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PciLibAddress = PCI_LIB_ADDRESS(0, 3, 0, CSR_EMULATION_FLAG_OFFSET);
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}
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EmulationType = PciRead32 (PciLibAddress);
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if (EmulationType != 0xFFFFFFFF) {
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if ((EmulationType & UBIOS_GENERATION_EN) != 0) {
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EmulationSetting->UbiosGenerationSetting = EMULATION_ENABLE;
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DEBUG ((DEBUG_INFO, "EmulationVariable.DfxUbiosGeneration = %d\n", EmulationSetting->UbiosGenerationSetting));
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}
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if ((EmulationType & HYBRID_SYSTEM_LEVEL_EMULATION_EN) != 0) {
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EmulationSetting->HybridSystemLevelEmulationSetting = EMULATION_ENABLE;
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DEBUG ((DEBUG_INFO, "EmulationSetting->HybridSystemLevelEmulationSetting = %d\n", EmulationSetting->HybridSystemLevelEmulationSetting));
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}
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}
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//
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// Install gEmulationHobGuid PPI to inform the Emulation Hob is ready.
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//
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Status = PeiServicesInstallPpi (&mPpiListEmulation);
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ASSERT_EFI_ERROR (Status);
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return EFI_SUCCESS;
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}
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