UefiCpuPkg/CpuMpPei/CpuMpPei.h - edk2 - Git at Google

 /** @file
   Definitions to install Multiple Processor PPI.

   Copyright (c) 2015 - 2023, Intel Corporation. All rights reserved.<BR>
   SPDX-License-Identifier: BSD-2-Clause-Patent

 **/

 #ifndef _CPU_MP_PEI_H_
 #define _CPU_MP_PEI_H_

 #include <PiPei.h>

 #include <Ppi/MpServices.h>
 #include <Ppi/SecPlatformInformation.h>
 #include <Ppi/SecPlatformInformation2.h>
 #include <Ppi/EndOfPeiPhase.h>
 #include <Ppi/MpServices2.h>

 #include <Library/BaseLib.h>
 #include <Library/DebugLib.h>
 #include <Library/HobLib.h>
 #include <Library/LocalApicLib.h>
 #include <Library/PeimEntryPoint.h>
 #include <Library/PeiServicesLib.h>
 #include <Library/ReportStatusCodeLib.h>
 #include <Library/CpuExceptionHandlerLib.h>
 #include <Library/MpInitLib.h>
 #include <Library/BaseMemoryLib.h>
 #include <Library/MemoryAllocationLib.h>
 #include <Library/CpuPageTableLib.h>

 #include <Guid/MpInformation2.h>

 #include <Register/Cpuid.h>

 extern EFI_PEI_PPI_DESCRIPTOR  mPeiCpuMpPpiDesc;

 /**
   This service retrieves the number of logical processor in the platform
   and the number of those logical processors that are enabled on this boot.
   This service may only be called from the BSP.

   This function is used to retrieve the following information:
     - The number of logical processors that are present in the system.
     - The number of enabled logical processors in the system at the instant
       this call is made.

   Because MP Service Ppi provides services to enable and disable processors
   dynamically, the number of enabled logical processors may vary during the
   course of a boot session.

   If this service is called from an AP, then EFI_DEVICE_ERROR is returned.
   If NumberOfProcessors or NumberOfEnabledProcessors is NULL, then
   EFI_INVALID_PARAMETER is returned. Otherwise, the total number of processors
   is returned in NumberOfProcessors, the number of currently enabled processor
   is returned in NumberOfEnabledProcessors, and EFI_SUCCESS is returned.

   @param[in]  PeiServices         An indirect pointer to the PEI Services Table
                                   published by the PEI Foundation.
   @param[in]  This                Pointer to this instance of the PPI.
   @param[out] NumberOfProcessors  Pointer to the total number of logical processors in
                                   the system, including the BSP and disabled APs.
   @param[out] NumberOfEnabledProcessors
                                   Number of processors in the system that are enabled.

   @retval EFI_SUCCESS             The number of logical processors and enabled
                                   logical processors was retrieved.
   @retval EFI_DEVICE_ERROR        The calling processor is an AP.
   @retval EFI_INVALID_PARAMETER   NumberOfProcessors is NULL.
                                   NumberOfEnabledProcessors is NULL.
 **/
 EFI_STATUS
 EFIAPI
 PeiGetNumberOfProcessors (
   IN  CONST EFI_PEI_SERVICES   **PeiServices,
   IN  EFI_PEI_MP_SERVICES_PPI  *This,
   OUT UINTN                    *NumberOfProcessors,
   OUT UINTN                    *NumberOfEnabledProcessors
   );

 /**
   Gets detailed MP-related information on the requested processor at the
   instant this call is made. This service may only be called from the BSP.

   This service retrieves detailed MP-related information about any processor
   on the platform. Note the following:
     - The processor information may change during the course of a boot session.
     - The information presented here is entirely MP related.

   Information regarding the number of caches and their sizes, frequency of operation,
   slot numbers is all considered platform-related information and is not provided
   by this service.

   @param[in]  PeiServices         An indirect pointer to the PEI Services Table
                                   published by the PEI Foundation.
   @param[in]  This                Pointer to this instance of the PPI.
   @param[in]  ProcessorNumber     Pointer to the total number of logical processors in
                                   the system, including the BSP and disabled APs.
   @param[out] ProcessorInfoBuffer Number of processors in the system that are enabled.

   @retval EFI_SUCCESS             Processor information was returned.
   @retval EFI_DEVICE_ERROR        The calling processor is an AP.
   @retval EFI_INVALID_PARAMETER   ProcessorInfoBuffer is NULL.
   @retval EFI_NOT_FOUND           The processor with the handle specified by
                                   ProcessorNumber does not exist in the platform.
 **/
 EFI_STATUS
 EFIAPI
 PeiGetProcessorInfo (
   IN  CONST EFI_PEI_SERVICES     **PeiServices,
   IN  EFI_PEI_MP_SERVICES_PPI    *This,
   IN  UINTN                      ProcessorNumber,
   OUT EFI_PROCESSOR_INFORMATION  *ProcessorInfoBuffer
   );

 /**
   This service executes a caller provided function on all enabled APs. APs can
   run either simultaneously or one at a time in sequence. This service supports
   both blocking requests only. This service may only
   be called from the BSP.

   This function is used to dispatch all the enabled APs to the function specified
   by Procedure.  If any enabled AP is busy, then EFI_NOT_READY is returned
   immediately and Procedure is not started on any AP.

   If SingleThread is TRUE, all the enabled APs execute the function specified by
   Procedure one by one, in ascending order of processor handle number. Otherwise,
   all the enabled APs execute the function specified by Procedure simultaneously.

   If the timeout specified by TimeoutInMicroSeconds expires before all APs return
   from Procedure, then Procedure on the failed APs is terminated. All enabled APs
   are always available for further calls to EFI_PEI_MP_SERVICES_PPI.StartupAllAPs()
   and EFI_PEI_MP_SERVICES_PPI.StartupThisAP(). If FailedCpuList is not NULL, its
   content points to the list of processor handle numbers in which Procedure was
   terminated.

   Note: It is the responsibility of the consumer of the EFI_PEI_MP_SERVICES_PPI.StartupAllAPs()
   to make sure that the nature of the code that is executed on the BSP and the
   dispatched APs is well controlled. The MP Services Ppi does not guarantee
   that the Procedure function is MP-safe. Hence, the tasks that can be run in
   parallel are limited to certain independent tasks and well-controlled exclusive
   code. PEI services and Ppis may not be called by APs unless otherwise
   specified.

   In blocking execution mode, BSP waits until all APs finish or
   TimeoutInMicroSeconds expires.

   @param[in] PeiServices          An indirect pointer to the PEI Services Table
                                   published by the PEI Foundation.
   @param[in] This                 A pointer to the EFI_PEI_MP_SERVICES_PPI instance.
   @param[in] Procedure            A pointer to the function to be run on enabled APs of
                                   the system.
   @param[in] SingleThread         If TRUE, then all the enabled APs execute the function
                                   specified by Procedure one by one, in ascending order
                                   of processor handle number. If FALSE, then all the
                                   enabled APs execute the function specified by Procedure
                                   simultaneously.
   @param[in] TimeoutInMicroSeconds
                                   Indicates the time limit in microseconds for APs to
                                   return from Procedure, for blocking mode only. Zero
                                   means infinity. If the timeout expires before all APs
                                   return from Procedure, then Procedure on the failed APs
                                   is terminated. All enabled APs are available for next
                                   function assigned by EFI_PEI_MP_SERVICES_PPI.StartupAllAPs()
                                   or EFI_PEI_MP_SERVICES_PPI.StartupThisAP(). If the
                                   timeout expires in blocking mode, BSP returns
                                   EFI_TIMEOUT.
   @param[in] ProcedureArgument    The parameter passed into Procedure for all APs.

   @retval EFI_SUCCESS             In blocking mode, all APs have finished before the
                                   timeout expired.
   @retval EFI_DEVICE_ERROR        Caller processor is AP.
   @retval EFI_NOT_STARTED         No enabled APs exist in the system.
   @retval EFI_NOT_READY           Any enabled APs are busy.
   @retval EFI_TIMEOUT             In blocking mode, the timeout expired before all
                                   enabled APs have finished.
   @retval EFI_INVALID_PARAMETER   Procedure is NULL.
 **/
 EFI_STATUS
 EFIAPI
 PeiStartupAllAPs (
   IN  CONST EFI_PEI_SERVICES   **PeiServices,
   IN  EFI_PEI_MP_SERVICES_PPI  *This,
   IN  EFI_AP_PROCEDURE         Procedure,
   IN  BOOLEAN                  SingleThread,
   IN  UINTN                    TimeoutInMicroSeconds,
   IN  VOID                     *ProcedureArgument      OPTIONAL
   );

 /**
   This service lets the caller get one enabled AP to execute a caller-provided
   function. The caller can request the BSP to wait for the completion
   of the AP. This service may only be called from the BSP.

   This function is used to dispatch one enabled AP to the function specified by
   Procedure passing in the argument specified by ProcedureArgument.
   The execution is in blocking mode. The BSP waits until the AP finishes or
   TimeoutInMicroSecondss expires.

   If the timeout specified by TimeoutInMicroseconds expires before the AP returns
   from Procedure, then execution of Procedure by the AP is terminated. The AP is
   available for subsequent calls to EFI_PEI_MP_SERVICES_PPI.StartupAllAPs() and
   EFI_PEI_MP_SERVICES_PPI.StartupThisAP().

   @param[in] PeiServices          An indirect pointer to the PEI Services Table
                                   published by the PEI Foundation.
   @param[in] This                 A pointer to the EFI_PEI_MP_SERVICES_PPI instance.
   @param[in] Procedure            A pointer to the function to be run on enabled APs of
                                   the system.
   @param[in] ProcessorNumber      The handle number of the AP. The range is from 0 to the
                                   total number of logical processors minus 1. The total
                                   number of logical processors can be retrieved by
                                   EFI_PEI_MP_SERVICES_PPI.GetNumberOfProcessors().
   @param[in] TimeoutInMicroseconds
                                   Indicates the time limit in microseconds for APs to
                                   return from Procedure, for blocking mode only. Zero
                                   means infinity. If the timeout expires before all APs
                                   return from Procedure, then Procedure on the failed APs
                                   is terminated. All enabled APs are available for next
                                   function assigned by EFI_PEI_MP_SERVICES_PPI.StartupAllAPs()
                                   or EFI_PEI_MP_SERVICES_PPI.StartupThisAP(). If the
                                   timeout expires in blocking mode, BSP returns
                                   EFI_TIMEOUT.
   @param[in] ProcedureArgument    The parameter passed into Procedure for all APs.

   @retval EFI_SUCCESS             In blocking mode, specified AP finished before the
                                   timeout expires.
   @retval EFI_DEVICE_ERROR        The calling processor is an AP.
   @retval EFI_TIMEOUT             In blocking mode, the timeout expired before the
                                   specified AP has finished.
   @retval EFI_NOT_FOUND           The processor with the handle specified by
                                   ProcessorNumber does not exist.
   @retval EFI_INVALID_PARAMETER   ProcessorNumber specifies the BSP or disabled AP.
   @retval EFI_INVALID_PARAMETER   Procedure is NULL.
 **/
 EFI_STATUS
 EFIAPI
 PeiStartupThisAP (
   IN  CONST EFI_PEI_SERVICES   **PeiServices,
   IN  EFI_PEI_MP_SERVICES_PPI  *This,
   IN  EFI_AP_PROCEDURE         Procedure,
   IN  UINTN                    ProcessorNumber,
   IN  UINTN                    TimeoutInMicroseconds,
   IN  VOID                     *ProcedureArgument      OPTIONAL
   );

 /**
   This service switches the requested AP to be the BSP from that point onward.
   This service changes the BSP for all purposes.   This call can only be performed
   by the current BSP.

   This service switches the requested AP to be the BSP from that point onward.
   This service changes the BSP for all purposes. The new BSP can take over the
   execution of the old BSP and continue seamlessly from where the old one left
   off.

   If the BSP cannot be switched prior to the return from this service, then
   EFI_UNSUPPORTED must be returned.

   @param[in] PeiServices          An indirect pointer to the PEI Services Table
                                   published by the PEI Foundation.
   @param[in] This                 A pointer to the EFI_PEI_MP_SERVICES_PPI instance.
   @param[in] ProcessorNumber      The handle number of the AP. The range is from 0 to the
                                   total number of logical processors minus 1. The total
                                   number of logical processors can be retrieved by
                                   EFI_PEI_MP_SERVICES_PPI.GetNumberOfProcessors().
   @param[in] EnableOldBSP         If TRUE, then the old BSP will be listed as an enabled
                                   AP. Otherwise, it will be disabled.

   @retval EFI_SUCCESS             BSP successfully switched.
   @retval EFI_UNSUPPORTED         Switching the BSP cannot be completed prior to this
                                   service returning.
   @retval EFI_UNSUPPORTED         Switching the BSP is not supported.
   @retval EFI_DEVICE_ERROR        The calling processor is an AP.
   @retval EFI_NOT_FOUND           The processor with the handle specified by
                                   ProcessorNumber does not exist.
   @retval EFI_INVALID_PARAMETER   ProcessorNumber specifies the current BSP or a disabled
                                   AP.
   @retval EFI_NOT_READY           The specified AP is busy.
 **/
 EFI_STATUS
 EFIAPI
 PeiSwitchBSP (
   IN  CONST EFI_PEI_SERVICES   **PeiServices,
   IN  EFI_PEI_MP_SERVICES_PPI  *This,
   IN  UINTN                    ProcessorNumber,
   IN  BOOLEAN                  EnableOldBSP
   );

 /**
   This service lets the caller enable or disable an AP from this point onward.
   This service may only be called from the BSP.

   This service allows the caller enable or disable an AP from this point onward.
   The caller can optionally specify the health status of the AP by Health. If
   an AP is being disabled, then the state of the disabled AP is implementation
   dependent. If an AP is enabled, then the implementation must guarantee that a
   complete initialization sequence is performed on the AP, so the AP is in a state
   that is compatible with an MP operating system.

   If the enable or disable AP operation cannot be completed prior to the return
   from this service, then EFI_UNSUPPORTED must be returned.

   @param[in] PeiServices          An indirect pointer to the PEI Services Table
                                   published by the PEI Foundation.
   @param[in] This                 A pointer to the EFI_PEI_MP_SERVICES_PPI instance.
   @param[in] ProcessorNumber      The handle number of the AP. The range is from 0 to the
                                   total number of logical processors minus 1. The total
                                   number of logical processors can be retrieved by
                                   EFI_PEI_MP_SERVICES_PPI.GetNumberOfProcessors().
   @param[in] EnableAP             Specifies the new state for the processor for enabled,
                                   FALSE for disabled.
   @param[in] HealthFlag           If not NULL, a pointer to a value that specifies the
                                   new health status of the AP. This flag corresponds to
                                   StatusFlag defined in EFI_PEI_MP_SERVICES_PPI.GetProcessorInfo().
                                   Only the PROCESSOR_HEALTH_STATUS_BIT is used. All other
                                   bits are ignored. If it is NULL, this parameter is
                                   ignored.

   @retval EFI_SUCCESS             The specified AP was enabled or disabled successfully.
   @retval EFI_UNSUPPORTED         Enabling or disabling an AP cannot be completed prior
                                   to this service returning.
   @retval EFI_UNSUPPORTED         Enabling or disabling an AP is not supported.
   @retval EFI_DEVICE_ERROR        The calling processor is an AP.
   @retval EFI_NOT_FOUND           Processor with the handle specified by ProcessorNumber
                                   does not exist.
   @retval EFI_INVALID_PARAMETER   ProcessorNumber specifies the BSP.
 **/
 EFI_STATUS
 EFIAPI
 PeiEnableDisableAP (
   IN  CONST EFI_PEI_SERVICES   **PeiServices,
   IN  EFI_PEI_MP_SERVICES_PPI  *This,
   IN  UINTN                    ProcessorNumber,
   IN  BOOLEAN                  EnableAP,
   IN  UINT32                   *HealthFlag OPTIONAL
   );

 /**
   This return the handle number for the calling processor.  This service may be
   called from the BSP and APs.

   This service returns the processor handle number for the calling processor.
   The returned value is in the range from 0 to the total number of logical
   processors minus 1. The total number of logical processors can be retrieved
   with EFI_PEI_MP_SERVICES_PPI.GetNumberOfProcessors(). This service may be
   called from the BSP and APs. If ProcessorNumber is NULL, then EFI_INVALID_PARAMETER
   is returned. Otherwise, the current processors handle number is returned in
   ProcessorNumber, and EFI_SUCCESS is returned.

   @param[in]  PeiServices         An indirect pointer to the PEI Services Table
                                   published by the PEI Foundation.
   @param[in]  This                A pointer to the EFI_PEI_MP_SERVICES_PPI instance.
   @param[out] ProcessorNumber     The handle number of the AP. The range is from 0 to the
                                   total number of logical processors minus 1. The total
                                   number of logical processors can be retrieved by
                                   EFI_PEI_MP_SERVICES_PPI.GetNumberOfProcessors().

   @retval EFI_SUCCESS             The current processor handle number was returned in
                                   ProcessorNumber.
   @retval EFI_INVALID_PARAMETER   ProcessorNumber is NULL.
 **/
 EFI_STATUS
 EFIAPI
 PeiWhoAmI (
   IN  CONST EFI_PEI_SERVICES   **PeiServices,
   IN  EFI_PEI_MP_SERVICES_PPI  *This,
   OUT UINTN                    *ProcessorNumber
   );

 /**
   Collects BIST data from PPI.

   This function collects BIST data from Sec Platform Information2 PPI
   or SEC Platform Information PPI.

   @param PeiServices         Pointer to PEI Services Table

 **/
 VOID
 CollectBistDataFromPpi (
   IN CONST EFI_PEI_SERVICES  **PeiServices
   );

 /**
   Implementation of the PlatformInformation2 service in EFI_SEC_PLATFORM_INFORMATION2_PPI.

   @param  PeiServices                The pointer to the PEI Services Table.
   @param  StructureSize              The pointer to the variable describing size of the input buffer.
   @param  PlatformInformationRecord2 The pointer to the EFI_SEC_PLATFORM_INFORMATION_RECORD2.

   @retval EFI_SUCCESS                The data was successfully returned.
   @retval EFI_BUFFER_TOO_SMALL       The buffer was too small. The current buffer size needed to
                                      hold the record is returned in StructureSize.

 **/
 EFI_STATUS
 EFIAPI
 SecPlatformInformation2 (
   IN CONST EFI_PEI_SERVICES                 **PeiServices,
   IN OUT UINT64                             *StructureSize,
   OUT EFI_SEC_PLATFORM_INFORMATION_RECORD2  *PlatformInformationRecord2
   );

 /**
   Migrates the Global Descriptor Table (GDT) to permanent memory.

   @retval   EFI_SUCCESS           The GDT was migrated successfully.
   @retval   EFI_OUT_OF_RESOURCES  The GDT could not be migrated due to lack of available memory.

 **/
 EFI_STATUS
 MigrateGdt (
   VOID
   );

 /**
   Initializes MP and exceptions handlers.

   @param  PeiServices                The pointer to the PEI Services Table.

   @retval EFI_SUCCESS     MP was successfully initialized.
   @retval others          Error occurred in MP initialization.

 **/
 EFI_STATUS
 InitializeCpuMpWorker (
   IN CONST EFI_PEI_SERVICES  **PeiServices
   );

 /**
   Enable/setup stack guard for each processor if PcdCpuStackGuard is set to TRUE.

   Doing this in the memory-discovered callback is to make sure the Stack Guard
   feature to cover as most PEI code as possible.

   @param[in] PeiServices          General purpose services available to every PEIM.
   @param[in] NotifyDescriptor     The notification structure this PEIM registered on install.
   @param[in] Ppi                  The memory discovered PPI.  Not used.

   @retval EFI_SUCCESS             The function completed successfully.
   @retval others                  There's error in MP initialization.
 **/
 EFI_STATUS
 EFIAPI
 MemoryDiscoveredPpiNotifyCallback (
   IN EFI_PEI_SERVICES           **PeiServices,
   IN EFI_PEI_NOTIFY_DESCRIPTOR  *NotifyDescriptor,
   IN VOID                       *Ppi
   );

 extern EFI_PEI_NOTIFY_DESCRIPTOR  mPostMemNotifyList[];

 #endif
	/** @file
	Definitions to install Multiple Processor PPI.

	Copyright (c) 2015 - 2023, Intel Corporation. All rights reserved.<BR>
	SPDX-License-Identifier: BSD-2-Clause-Patent

	**/

	#ifndef _CPU_MP_PEI_H_
	#define _CPU_MP_PEI_H_

	#include <PiPei.h>

	#include <Ppi/MpServices.h>
	#include <Ppi/SecPlatformInformation.h>
	#include <Ppi/SecPlatformInformation2.h>
	#include <Ppi/EndOfPeiPhase.h>
	#include <Ppi/MpServices2.h>

	#include <Library/BaseLib.h>
	#include <Library/DebugLib.h>
	#include <Library/HobLib.h>
	#include <Library/LocalApicLib.h>
	#include <Library/PeimEntryPoint.h>
	#include <Library/PeiServicesLib.h>
	#include <Library/ReportStatusCodeLib.h>
	#include <Library/CpuExceptionHandlerLib.h>
	#include <Library/MpInitLib.h>
	#include <Library/BaseMemoryLib.h>
	#include <Library/MemoryAllocationLib.h>
	#include <Library/CpuPageTableLib.h>

	#include <Guid/MpInformation2.h>

	#include <Register/Cpuid.h>

	extern EFI_PEI_PPI_DESCRIPTOR mPeiCpuMpPpiDesc;

	/**
	This service retrieves the number of logical processor in the platform
	and the number of those logical processors that are enabled on this boot.
	This service may only be called from the BSP.

	This function is used to retrieve the following information:
	- The number of logical processors that are present in the system.
	- The number of enabled logical processors in the system at the instant
	this call is made.

	Because MP Service Ppi provides services to enable and disable processors
	dynamically, the number of enabled logical processors may vary during the
	course of a boot session.

	If this service is called from an AP, then EFI_DEVICE_ERROR is returned.
	If NumberOfProcessors or NumberOfEnabledProcessors is NULL, then
	EFI_INVALID_PARAMETER is returned. Otherwise, the total number of processors
	is returned in NumberOfProcessors, the number of currently enabled processor
	is returned in NumberOfEnabledProcessors, and EFI_SUCCESS is returned.

	@param[in] PeiServices An indirect pointer to the PEI Services Table
	published by the PEI Foundation.
	@param[in] This Pointer to this instance of the PPI.
	@param[out] NumberOfProcessors Pointer to the total number of logical processors in
	the system, including the BSP and disabled APs.
	@param[out] NumberOfEnabledProcessors
	Number of processors in the system that are enabled.

	@retval EFI_SUCCESS The number of logical processors and enabled
	logical processors was retrieved.
	@retval EFI_DEVICE_ERROR The calling processor is an AP.
	@retval EFI_INVALID_PARAMETER NumberOfProcessors is NULL.
	NumberOfEnabledProcessors is NULL.
	**/
	EFI_STATUS
	EFIAPI
	PeiGetNumberOfProcessors (
	IN CONST EFI_PEI_SERVICES **PeiServices,
	IN EFI_PEI_MP_SERVICES_PPI *This,
	OUT UINTN *NumberOfProcessors,
	OUT UINTN *NumberOfEnabledProcessors
	);

	/**
	Gets detailed MP-related information on the requested processor at the
	instant this call is made. This service may only be called from the BSP.

	This service retrieves detailed MP-related information about any processor
	on the platform. Note the following:
	- The processor information may change during the course of a boot session.
	- The information presented here is entirely MP related.

	Information regarding the number of caches and their sizes, frequency of operation,
	slot numbers is all considered platform-related information and is not provided
	by this service.

	@param[in] PeiServices An indirect pointer to the PEI Services Table
	published by the PEI Foundation.
	@param[in] This Pointer to this instance of the PPI.
	@param[in] ProcessorNumber Pointer to the total number of logical processors in
	the system, including the BSP and disabled APs.
	@param[out] ProcessorInfoBuffer Number of processors in the system that are enabled.

	@retval EFI_SUCCESS Processor information was returned.
	@retval EFI_DEVICE_ERROR The calling processor is an AP.
	@retval EFI_INVALID_PARAMETER ProcessorInfoBuffer is NULL.
	@retval EFI_NOT_FOUND The processor with the handle specified by
	ProcessorNumber does not exist in the platform.
	**/
	EFI_STATUS
	EFIAPI
	PeiGetProcessorInfo (
	IN CONST EFI_PEI_SERVICES **PeiServices,
	IN EFI_PEI_MP_SERVICES_PPI *This,
	IN UINTN ProcessorNumber,
	OUT EFI_PROCESSOR_INFORMATION *ProcessorInfoBuffer
	);

	/**
	This service executes a caller provided function on all enabled APs. APs can
	run either simultaneously or one at a time in sequence. This service supports
	both blocking requests only. This service may only
	be called from the BSP.

	This function is used to dispatch all the enabled APs to the function specified
	by Procedure. If any enabled AP is busy, then EFI_NOT_READY is returned
	immediately and Procedure is not started on any AP.

	If SingleThread is TRUE, all the enabled APs execute the function specified by
	Procedure one by one, in ascending order of processor handle number. Otherwise,
	all the enabled APs execute the function specified by Procedure simultaneously.

	If the timeout specified by TimeoutInMicroSeconds expires before all APs return
	from Procedure, then Procedure on the failed APs is terminated. All enabled APs
	are always available for further calls to EFI_PEI_MP_SERVICES_PPI.StartupAllAPs()
	and EFI_PEI_MP_SERVICES_PPI.StartupThisAP(). If FailedCpuList is not NULL, its
	content points to the list of processor handle numbers in which Procedure was
	terminated.

	Note: It is the responsibility of the consumer of the EFI_PEI_MP_SERVICES_PPI.StartupAllAPs()
	to make sure that the nature of the code that is executed on the BSP and the
	dispatched APs is well controlled. The MP Services Ppi does not guarantee
	that the Procedure function is MP-safe. Hence, the tasks that can be run in
	parallel are limited to certain independent tasks and well-controlled exclusive
	code. PEI services and Ppis may not be called by APs unless otherwise
	specified.

	In blocking execution mode, BSP waits until all APs finish or
	TimeoutInMicroSeconds expires.

	@param[in] PeiServices An indirect pointer to the PEI Services Table
	published by the PEI Foundation.
	@param[in] This A pointer to the EFI_PEI_MP_SERVICES_PPI instance.
	@param[in] Procedure A pointer to the function to be run on enabled APs of
	the system.
	@param[in] SingleThread If TRUE, then all the enabled APs execute the function
	specified by Procedure one by one, in ascending order
	of processor handle number. If FALSE, then all the
	enabled APs execute the function specified by Procedure
	simultaneously.
	@param[in] TimeoutInMicroSeconds
	Indicates the time limit in microseconds for APs to
	return from Procedure, for blocking mode only. Zero
	means infinity. If the timeout expires before all APs
	return from Procedure, then Procedure on the failed APs
	is terminated. All enabled APs are available for next
	function assigned by EFI_PEI_MP_SERVICES_PPI.StartupAllAPs()
	or EFI_PEI_MP_SERVICES_PPI.StartupThisAP(). If the
	timeout expires in blocking mode, BSP returns
	EFI_TIMEOUT.
	@param[in] ProcedureArgument The parameter passed into Procedure for all APs.

	@retval EFI_SUCCESS In blocking mode, all APs have finished before the
	timeout expired.
	@retval EFI_DEVICE_ERROR Caller processor is AP.
	@retval EFI_NOT_STARTED No enabled APs exist in the system.
	@retval EFI_NOT_READY Any enabled APs are busy.
	@retval EFI_TIMEOUT In blocking mode, the timeout expired before all
	enabled APs have finished.
	@retval EFI_INVALID_PARAMETER Procedure is NULL.
	**/
	EFI_STATUS
	EFIAPI
	PeiStartupAllAPs (
	IN CONST EFI_PEI_SERVICES **PeiServices,
	IN EFI_PEI_MP_SERVICES_PPI *This,
	IN EFI_AP_PROCEDURE Procedure,
	IN BOOLEAN SingleThread,
	IN UINTN TimeoutInMicroSeconds,
	IN VOID *ProcedureArgument OPTIONAL
	);

	/**
	This service lets the caller get one enabled AP to execute a caller-provided
	function. The caller can request the BSP to wait for the completion
	of the AP. This service may only be called from the BSP.

	This function is used to dispatch one enabled AP to the function specified by
	Procedure passing in the argument specified by ProcedureArgument.
	The execution is in blocking mode. The BSP waits until the AP finishes or
	TimeoutInMicroSecondss expires.

	If the timeout specified by TimeoutInMicroseconds expires before the AP returns
	from Procedure, then execution of Procedure by the AP is terminated. The AP is
	available for subsequent calls to EFI_PEI_MP_SERVICES_PPI.StartupAllAPs() and
	EFI_PEI_MP_SERVICES_PPI.StartupThisAP().

	@param[in] PeiServices An indirect pointer to the PEI Services Table
	published by the PEI Foundation.
	@param[in] This A pointer to the EFI_PEI_MP_SERVICES_PPI instance.
	@param[in] Procedure A pointer to the function to be run on enabled APs of
	the system.
	@param[in] ProcessorNumber The handle number of the AP. The range is from 0 to the
	total number of logical processors minus 1. The total
	number of logical processors can be retrieved by
	EFI_PEI_MP_SERVICES_PPI.GetNumberOfProcessors().
	@param[in] TimeoutInMicroseconds
	Indicates the time limit in microseconds for APs to
	return from Procedure, for blocking mode only. Zero
	means infinity. If the timeout expires before all APs
	return from Procedure, then Procedure on the failed APs
	is terminated. All enabled APs are available for next
	function assigned by EFI_PEI_MP_SERVICES_PPI.StartupAllAPs()
	or EFI_PEI_MP_SERVICES_PPI.StartupThisAP(). If the
	timeout expires in blocking mode, BSP returns
	EFI_TIMEOUT.
	@param[in] ProcedureArgument The parameter passed into Procedure for all APs.

	@retval EFI_SUCCESS In blocking mode, specified AP finished before the
	timeout expires.
	@retval EFI_DEVICE_ERROR The calling processor is an AP.
	@retval EFI_TIMEOUT In blocking mode, the timeout expired before the
	specified AP has finished.
	@retval EFI_NOT_FOUND The processor with the handle specified by
	ProcessorNumber does not exist.
	@retval EFI_INVALID_PARAMETER ProcessorNumber specifies the BSP or disabled AP.
	@retval EFI_INVALID_PARAMETER Procedure is NULL.
	**/
	EFI_STATUS
	EFIAPI
	PeiStartupThisAP (
	IN CONST EFI_PEI_SERVICES **PeiServices,
	IN EFI_PEI_MP_SERVICES_PPI *This,
	IN EFI_AP_PROCEDURE Procedure,
	IN UINTN ProcessorNumber,
	IN UINTN TimeoutInMicroseconds,
	IN VOID *ProcedureArgument OPTIONAL
	);

	/**
	This service switches the requested AP to be the BSP from that point onward.
	This service changes the BSP for all purposes. This call can only be performed
	by the current BSP.

	This service switches the requested AP to be the BSP from that point onward.
	This service changes the BSP for all purposes. The new BSP can take over the
	execution of the old BSP and continue seamlessly from where the old one left
	off.

	If the BSP cannot be switched prior to the return from this service, then
	EFI_UNSUPPORTED must be returned.

	@param[in] PeiServices An indirect pointer to the PEI Services Table
	published by the PEI Foundation.
	@param[in] This A pointer to the EFI_PEI_MP_SERVICES_PPI instance.
	@param[in] ProcessorNumber The handle number of the AP. The range is from 0 to the
	total number of logical processors minus 1. The total
	number of logical processors can be retrieved by
	EFI_PEI_MP_SERVICES_PPI.GetNumberOfProcessors().
	@param[in] EnableOldBSP If TRUE, then the old BSP will be listed as an enabled
	AP. Otherwise, it will be disabled.

	@retval EFI_SUCCESS BSP successfully switched.
	@retval EFI_UNSUPPORTED Switching the BSP cannot be completed prior to this
	service returning.
	@retval EFI_UNSUPPORTED Switching the BSP is not supported.
	@retval EFI_DEVICE_ERROR The calling processor is an AP.
	@retval EFI_NOT_FOUND The processor with the handle specified by
	ProcessorNumber does not exist.
	@retval EFI_INVALID_PARAMETER ProcessorNumber specifies the current BSP or a disabled
	AP.
	@retval EFI_NOT_READY The specified AP is busy.
	**/
	EFI_STATUS
	EFIAPI
	PeiSwitchBSP (
	IN CONST EFI_PEI_SERVICES **PeiServices,
	IN EFI_PEI_MP_SERVICES_PPI *This,
	IN UINTN ProcessorNumber,
	IN BOOLEAN EnableOldBSP
	);

	/**
	This service lets the caller enable or disable an AP from this point onward.
	This service may only be called from the BSP.

	This service allows the caller enable or disable an AP from this point onward.
	The caller can optionally specify the health status of the AP by Health. If
	an AP is being disabled, then the state of the disabled AP is implementation
	dependent. If an AP is enabled, then the implementation must guarantee that a
	complete initialization sequence is performed on the AP, so the AP is in a state
	that is compatible with an MP operating system.

	If the enable or disable AP operation cannot be completed prior to the return
	from this service, then EFI_UNSUPPORTED must be returned.

	@param[in] PeiServices An indirect pointer to the PEI Services Table
	published by the PEI Foundation.
	@param[in] This A pointer to the EFI_PEI_MP_SERVICES_PPI instance.
	@param[in] ProcessorNumber The handle number of the AP. The range is from 0 to the
	total number of logical processors minus 1. The total
	number of logical processors can be retrieved by
	EFI_PEI_MP_SERVICES_PPI.GetNumberOfProcessors().
	@param[in] EnableAP Specifies the new state for the processor for enabled,
	FALSE for disabled.
	@param[in] HealthFlag If not NULL, a pointer to a value that specifies the
	new health status of the AP. This flag corresponds to
	StatusFlag defined in EFI_PEI_MP_SERVICES_PPI.GetProcessorInfo().
	Only the PROCESSOR_HEALTH_STATUS_BIT is used. All other
	bits are ignored. If it is NULL, this parameter is
	ignored.

	@retval EFI_SUCCESS The specified AP was enabled or disabled successfully.
	@retval EFI_UNSUPPORTED Enabling or disabling an AP cannot be completed prior
	to this service returning.
	@retval EFI_UNSUPPORTED Enabling or disabling an AP is not supported.
	@retval EFI_DEVICE_ERROR The calling processor is an AP.
	@retval EFI_NOT_FOUND Processor with the handle specified by ProcessorNumber
	does not exist.
	@retval EFI_INVALID_PARAMETER ProcessorNumber specifies the BSP.
	**/
	EFI_STATUS
	EFIAPI
	PeiEnableDisableAP (
	IN CONST EFI_PEI_SERVICES **PeiServices,
	IN EFI_PEI_MP_SERVICES_PPI *This,
	IN UINTN ProcessorNumber,
	IN BOOLEAN EnableAP,
	IN UINT32 *HealthFlag OPTIONAL
	);

	/**
	This return the handle number for the calling processor. This service may be
	called from the BSP and APs.

	This service returns the processor handle number for the calling processor.
	The returned value is in the range from 0 to the total number of logical
	processors minus 1. The total number of logical processors can be retrieved
	with EFI_PEI_MP_SERVICES_PPI.GetNumberOfProcessors(). This service may be
	called from the BSP and APs. If ProcessorNumber is NULL, then EFI_INVALID_PARAMETER
	is returned. Otherwise, the current processors handle number is returned in
	ProcessorNumber, and EFI_SUCCESS is returned.

	@param[in] PeiServices An indirect pointer to the PEI Services Table
	published by the PEI Foundation.
	@param[in] This A pointer to the EFI_PEI_MP_SERVICES_PPI instance.
	@param[out] ProcessorNumber The handle number of the AP. The range is from 0 to the
	total number of logical processors minus 1. The total
	number of logical processors can be retrieved by
	EFI_PEI_MP_SERVICES_PPI.GetNumberOfProcessors().

	@retval EFI_SUCCESS The current processor handle number was returned in
	ProcessorNumber.
	@retval EFI_INVALID_PARAMETER ProcessorNumber is NULL.
	**/
	EFI_STATUS
	EFIAPI
	PeiWhoAmI (
	IN CONST EFI_PEI_SERVICES **PeiServices,
	IN EFI_PEI_MP_SERVICES_PPI *This,
	OUT UINTN *ProcessorNumber
	);

	/**
	Collects BIST data from PPI.

	This function collects BIST data from Sec Platform Information2 PPI
	or SEC Platform Information PPI.

	@param PeiServices Pointer to PEI Services Table

	**/
	VOID
	CollectBistDataFromPpi (
	IN CONST EFI_PEI_SERVICES **PeiServices
	);

	/**
	Implementation of the PlatformInformation2 service in EFI_SEC_PLATFORM_INFORMATION2_PPI.

	@param PeiServices The pointer to the PEI Services Table.
	@param StructureSize The pointer to the variable describing size of the input buffer.
	@param PlatformInformationRecord2 The pointer to the EFI_SEC_PLATFORM_INFORMATION_RECORD2.

	@retval EFI_SUCCESS The data was successfully returned.
	@retval EFI_BUFFER_TOO_SMALL The buffer was too small. The current buffer size needed to
	hold the record is returned in StructureSize.

	**/
	EFI_STATUS
	EFIAPI
	SecPlatformInformation2 (
	IN CONST EFI_PEI_SERVICES **PeiServices,
	IN OUT UINT64 *StructureSize,
	OUT EFI_SEC_PLATFORM_INFORMATION_RECORD2 *PlatformInformationRecord2
	);

	/**
	Migrates the Global Descriptor Table (GDT) to permanent memory.

	@retval EFI_SUCCESS The GDT was migrated successfully.
	@retval EFI_OUT_OF_RESOURCES The GDT could not be migrated due to lack of available memory.

	**/
	EFI_STATUS
	MigrateGdt (
	VOID
	);

	/**
	Initializes MP and exceptions handlers.

	@param PeiServices The pointer to the PEI Services Table.

	@retval EFI_SUCCESS MP was successfully initialized.
	@retval others Error occurred in MP initialization.

	**/
	EFI_STATUS
	InitializeCpuMpWorker (
	IN CONST EFI_PEI_SERVICES **PeiServices
	);

	/**
	Enable/setup stack guard for each processor if PcdCpuStackGuard is set to TRUE.

	Doing this in the memory-discovered callback is to make sure the Stack Guard
	feature to cover as most PEI code as possible.

	@param[in] PeiServices General purpose services available to every PEIM.
	@param[in] NotifyDescriptor The notification structure this PEIM registered on install.
	@param[in] Ppi The memory discovered PPI. Not used.

	@retval EFI_SUCCESS The function completed successfully.
	@retval others There's error in MP initialization.
	**/
	EFI_STATUS
	EFIAPI
	MemoryDiscoveredPpiNotifyCallback (
	IN EFI_PEI_SERVICES **PeiServices,
	IN EFI_PEI_NOTIFY_DESCRIPTOR *NotifyDescriptor,
	IN VOID *Ppi
	);

	extern EFI_PEI_NOTIFY_DESCRIPTOR mPostMemNotifyList[];

	#endif