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/** @file
CPU Register Table Library functions.
Copyright (c) 2016 - 2020, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include <PiPei.h>
#include <Library/HobLib.h>
#include <Library/PeiServicesLib.h>
#include <Library/PeiServicesTablePointerLib.h>
#include <Ppi/MpServices2.h>
#include "RegisterCpuFeatures.h"
#define REGISTER_CPU_FEATURES_GUID \
{ \
0xa694c467, 0x697a, 0x446b, { 0xb9, 0x29, 0x5b, 0x14, 0xa0, 0xcf, 0x39, 0xf } \
}
EFI_GUID mRegisterCpuFeaturesHobGuid = REGISTER_CPU_FEATURES_GUID;
/**
Worker function to get CPU_FEATURES_DATA pointer.
@return Pointer to CPU_FEATURES_DATA.
**/
CPU_FEATURES_DATA *
GetCpuFeaturesData (
VOID
)
{
CPU_FEATURES_DATA *CpuInitData;
EFI_HOB_GUID_TYPE *GuidHob;
VOID *DataInHob;
UINT64 Data64;
CpuInitData = NULL;
GuidHob = GetFirstGuidHob (&mRegisterCpuFeaturesHobGuid);
if (GuidHob != NULL) {
DataInHob = GET_GUID_HOB_DATA (GuidHob);
CpuInitData = (CPU_FEATURES_DATA *) (*(UINTN *) DataInHob);
ASSERT (CpuInitData != NULL);
} else {
CpuInitData = AllocateZeroPool (sizeof (CPU_FEATURES_DATA));
ASSERT (CpuInitData != NULL);
//
// Build location of CPU MP DATA buffer in HOB
//
Data64 = (UINT64) (UINTN) CpuInitData;
BuildGuidDataHob (
&mRegisterCpuFeaturesHobGuid,
(VOID *) &Data64,
sizeof (UINT64)
);
}
return CpuInitData;
}
/**
Worker function to get MP PPI service pointer.
@return MP_SERVICES variable.
**/
MP_SERVICES
GetMpService (
VOID
)
{
EFI_STATUS Status;
MP_SERVICES MpService;
//
// Get MP Services2 Ppi
//
Status = PeiServicesLocatePpi (
&gEdkiiPeiMpServices2PpiGuid,
0,
NULL,
(VOID **)&MpService.Ppi
);
ASSERT_EFI_ERROR (Status);
return MpService;
}
/**
Worker function to return processor index.
@param CpuFeaturesData Cpu Feature Data structure.
@return The processor index.
**/
UINTN
GetProcessorIndex (
IN CPU_FEATURES_DATA *CpuFeaturesData
)
{
EFI_STATUS Status;
EDKII_PEI_MP_SERVICES2_PPI *CpuMp2Ppi;
UINTN ProcessorIndex;
CpuMp2Ppi = CpuFeaturesData->MpService.Ppi;
//
// For two reasons which use NULL for WhoAmI:
// 1. This function will be called by APs and AP should not use PeiServices Table
// 2. Check WhoAmI implementation, this parameter will not be used.
//
Status = CpuMp2Ppi->WhoAmI (CpuMp2Ppi, &ProcessorIndex);
ASSERT_EFI_ERROR (Status);
return ProcessorIndex;
}
/**
Worker function to MP-related information on the requested processor at the
instant this call is made.
@param[in] ProcessorNumber The handle number of processor.
@param[out] ProcessorInfoBuffer A pointer to the buffer where information for
the requested processor is deposited.
@return Status of MpServices->GetProcessorInfo().
**/
EFI_STATUS
GetProcessorInformation (
IN UINTN ProcessorNumber,
OUT EFI_PROCESSOR_INFORMATION *ProcessorInfoBuffer
)
{
EDKII_PEI_MP_SERVICES2_PPI *CpuMp2Ppi;
EFI_STATUS Status;
CPU_FEATURES_DATA *CpuFeaturesData;
CpuFeaturesData = GetCpuFeaturesData ();
CpuMp2Ppi = CpuFeaturesData->MpService.Ppi;
Status = CpuMp2Ppi->GetProcessorInfo (
CpuMp2Ppi,
ProcessorNumber,
ProcessorInfoBuffer
);
return Status;
}
/**
Worker function to execute a caller provided function on all enabled APs.
@param[in] Procedure A pointer to the function to be run on
enabled APs of the system.
@param[in] MpEvent The Event used to sync the result.
**/
VOID
StartupAllAPsWorker (
IN EFI_AP_PROCEDURE Procedure,
IN EFI_EVENT MpEvent
)
{
EFI_STATUS Status;
EDKII_PEI_MP_SERVICES2_PPI *CpuMp2Ppi;
CPU_FEATURES_DATA *CpuFeaturesData;
CpuFeaturesData = GetCpuFeaturesData ();
CpuMp2Ppi = CpuFeaturesData->MpService.Ppi;
//
// Wakeup all APs for data collection.
//
Status = CpuMp2Ppi->StartupAllAPs (
CpuMp2Ppi,
Procedure,
FALSE,
0,
CpuFeaturesData
);
ASSERT_EFI_ERROR (Status);
}
/**
Worker function to execute a caller provided function on all enabled CPUs.
@param[in] Procedure A pointer to the function to be run on
enabled CPUs of the system.
**/
VOID
StartupAllCPUsWorker (
IN EFI_AP_PROCEDURE Procedure
)
{
EFI_STATUS Status;
EDKII_PEI_MP_SERVICES2_PPI *CpuMp2Ppi;
CPU_FEATURES_DATA *CpuFeaturesData;
CpuFeaturesData = GetCpuFeaturesData ();
//
// Get MP Services2 Ppi
//
CpuMp2Ppi = CpuFeaturesData->MpService.Ppi;
Status = CpuMp2Ppi->StartupAllCPUs (
CpuMp2Ppi,
Procedure,
0,
CpuFeaturesData
);
ASSERT_EFI_ERROR (Status);
}
/**
Worker function to switch the requested AP to be the BSP from that point onward.
@param[in] ProcessorNumber The handle number of AP that is to become the new BSP.
**/
VOID
SwitchNewBsp (
IN UINTN ProcessorNumber
)
{
EFI_STATUS Status;
EDKII_PEI_MP_SERVICES2_PPI *CpuMp2Ppi;
CPU_FEATURES_DATA *CpuFeaturesData;
CpuFeaturesData = GetCpuFeaturesData ();
CpuMp2Ppi = CpuFeaturesData->MpService.Ppi;
//
// Wakeup all APs for data collection.
//
Status = CpuMp2Ppi->SwitchBSP (
CpuMp2Ppi,
ProcessorNumber,
TRUE
);
ASSERT_EFI_ERROR (Status);
}
/**
Worker function to retrieve the number of logical processor in the platform.
@param[out] NumberOfCpus Pointer to the total number of logical
processors in the system, including the BSP
and disabled APs.
@param[out] NumberOfEnabledProcessors Pointer to the number of enabled logical
processors that exist in system, including
the BSP.
**/
VOID
GetNumberOfProcessor (
OUT UINTN *NumberOfCpus,
OUT UINTN *NumberOfEnabledProcessors
)
{
EFI_STATUS Status;
EDKII_PEI_MP_SERVICES2_PPI *CpuMp2Ppi;
CPU_FEATURES_DATA *CpuFeaturesData;
CpuFeaturesData = GetCpuFeaturesData ();
CpuMp2Ppi = CpuFeaturesData->MpService.Ppi;
//
// Get the number of CPUs
//
Status = CpuMp2Ppi->GetNumberOfProcessors (
CpuMp2Ppi,
NumberOfCpus,
NumberOfEnabledProcessors
);
ASSERT_EFI_ERROR (Status);
}
/**
Performs CPU features Initialization.
This service will invoke MP service to perform CPU features
initialization on BSP/APs per user configuration.
@note This service could be called by BSP only.
**/
VOID
EFIAPI
CpuFeaturesInitialize (
VOID
)
{
CPU_FEATURES_DATA *CpuFeaturesData;
UINTN OldBspNumber;
CpuFeaturesData = GetCpuFeaturesData ();
OldBspNumber = GetProcessorIndex (CpuFeaturesData);
CpuFeaturesData->BspNumber = OldBspNumber;
//
// Start to program register for all CPUs.
//
StartupAllCPUsWorker (SetProcessorRegister);
//
// Switch to new BSP if required
//
if (CpuFeaturesData->BspNumber != OldBspNumber) {
SwitchNewBsp (CpuFeaturesData->BspNumber);
}
}
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