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