TianoCore EDK2 master
CpuMp.c File Reference
#include "CpuDxe.h"
#include "CpuMp.h"

Go to the source code of this file.

Functions

EFI_STATUS EFIAPI GetNumberOfProcessors (IN EFI_MP_SERVICES_PROTOCOL *This, OUT UINTN *NumberOfProcessors, OUT UINTN *NumberOfEnabledProcessors)
 
EFI_STATUS EFIAPI GetProcessorInfo (IN EFI_MP_SERVICES_PROTOCOL *This, IN UINTN ProcessorNumber, OUT EFI_PROCESSOR_INFORMATION *ProcessorInfoBuffer)
 
EFI_STATUS EFIAPI StartupAllAPs (IN EFI_MP_SERVICES_PROTOCOL *This, IN EFI_AP_PROCEDURE Procedure, IN BOOLEAN SingleThread, IN EFI_EVENT WaitEvent OPTIONAL, IN UINTN TimeoutInMicroseconds, IN VOID *ProcedureArgument OPTIONAL, OUT UINTN **FailedCpuList OPTIONAL)
 
EFI_STATUS EFIAPI StartupThisAP (IN EFI_MP_SERVICES_PROTOCOL *This, IN EFI_AP_PROCEDURE Procedure, IN UINTN ProcessorNumber, IN EFI_EVENT WaitEvent OPTIONAL, IN UINTN TimeoutInMicroseconds, IN VOID *ProcedureArgument OPTIONAL, OUT BOOLEAN *Finished OPTIONAL)
 
EFI_STATUS EFIAPI SwitchBSP (IN EFI_MP_SERVICES_PROTOCOL *This, IN UINTN ProcessorNumber, IN BOOLEAN EnableOldBSP)
 
EFI_STATUS EFIAPI EnableDisableAP (IN EFI_MP_SERVICES_PROTOCOL *This, IN UINTN ProcessorNumber, IN BOOLEAN EnableAP, IN UINT32 *HealthFlag OPTIONAL)
 
EFI_STATUS EFIAPI WhoAmI (IN EFI_MP_SERVICES_PROTOCOL *This, OUT UINTN *ProcessorNumber)
 
VOID CollectBistDataFromHob (VOID)
 
VOID EFIAPI GetGdtr (IN OUT VOID *Buffer)
 
VOID EFIAPI InitializeExceptionStackSwitchHandlers (IN OUT VOID *Buffer)
 
VOID InitializeMpExceptionStackSwitchHandlers (VOID)
 
VOID InitializeMpExceptionHandlers (VOID)
 
VOID InitializeMpSupport (VOID)
 

Variables

EFI_HANDLE mMpServiceHandle = NULL
 
UINTN mNumberOfProcessors = 1
 
EFI_MP_SERVICES_PROTOCOL mMpServicesTemplate
 

Detailed Description

CPU DXE Module to produce CPU MP Protocol.

Copyright (c) 2008 - 2022, Intel Corporation. All rights reserved.
SPDX-License-Identifier: BSD-2-Clause-Patent

Definition in file CpuMp.c.

Function Documentation

◆ CollectBistDataFromHob()

VOID CollectBistDataFromHob ( VOID  )

Collects BIST data from HOB.

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

Definition at line 523 of file CpuMp.c.

◆ EnableDisableAP()

EFI_STATUS EFIAPI EnableDisableAP ( IN EFI_MP_SERVICES_PROTOCOL This,
IN UINTN  ProcessorNumber,
IN BOOLEAN  EnableAP,
IN UINT32 *HealthFlag  OPTIONAL 
)

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. This service may not be supported after the UEFI Event EFI_EVENT_GROUP_READY_TO_BOOT is signaled.

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

Parameters
[in]ThisA pointer to the EFI_MP_SERVICES_PROTOCOL instance.
[in]ProcessorNumberThe handle number of 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_MP_SERVICES_PROTOCOL.GetNumberOfProcessors().
[in]EnableAPSpecifies the new state for the processor for enabled, FALSE for disabled.
[in]HealthFlagIf not NULL, a pointer to a value that specifies the new health status of the AP. This flag corresponds to StatusFlag defined in EFI_MP_SERVICES_PROTOCOL.GetProcessorInfo(). Only the PROCESSOR_HEALTH_STATUS_BIT is used. All other bits are ignored. If it is NULL, this parameter is ignored.
Return values
EFI_SUCCESSThe specified AP was enabled or disabled successfully.
EFI_UNSUPPORTEDEnabling or disabling an AP cannot be completed prior to this service returning.
EFI_UNSUPPORTEDEnabling or disabling an AP is not supported.
EFI_DEVICE_ERRORThe calling processor is an AP.
EFI_NOT_FOUNDProcessor with the handle specified by ProcessorNumber does not exist.
EFI_INVALID_PARAMETERProcessorNumber specifies the BSP.

Definition at line 471 of file CpuMp.c.

◆ GetGdtr()

VOID EFIAPI GetGdtr ( IN OUT VOID Buffer)

Get GDT register value.

This function is mainly for AP purpose because AP may have different GDT table than BSP.

Parameters
[in,out]BufferThe pointer to private data buffer.

Definition at line 610 of file CpuMp.c.

◆ GetNumberOfProcessors()

EFI_STATUS EFIAPI GetNumberOfProcessors ( IN EFI_MP_SERVICES_PROTOCOL This,
OUT UINTN NumberOfProcessors,
OUT UINTN NumberOfEnabledProcessors 
)

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 Protocol 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.

Parameters
[in]ThisA pointer to the EFI_MP_SERVICES_PROTOCOL instance.
[out]NumberOfProcessorsPointer to the total number of logical processors in the system, including the BSP and disabled APs.
[out]NumberOfEnabledProcessorsPointer to the number of enabled logical processors that exist in system, including the BSP.
Return values
EFI_SUCCESSThe number of logical processors and enabled logical processors was retrieved.
EFI_DEVICE_ERRORThe calling processor is an AP.
EFI_INVALID_PARAMETERNumberOfProcessors is NULL.
EFI_INVALID_PARAMETERNumberOfEnabledProcessors is NULL.

Definition at line 63 of file CpuMp.c.

◆ GetProcessorInfo()

EFI_STATUS EFIAPI GetProcessorInfo ( IN EFI_MP_SERVICES_PROTOCOL This,
IN UINTN  ProcessorNumber,
OUT EFI_PROCESSOR_INFORMATION ProcessorInfoBuffer 
)

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.

Parameters
[in]ThisA pointer to the EFI_MP_SERVICES_PROTOCOL instance.
[in]ProcessorNumberThe handle number of processor.
[out]ProcessorInfoBufferA pointer to the buffer where information for the requested processor is deposited.
Return values
EFI_SUCCESSProcessor information was returned.
EFI_DEVICE_ERRORThe calling processor is an AP.
EFI_INVALID_PARAMETERProcessorInfoBuffer is NULL.
EFI_NOT_FOUNDThe processor with the handle specified by ProcessorNumber does not exist in the platform.

Definition at line 107 of file CpuMp.c.

◆ InitializeExceptionStackSwitchHandlers()

VOID EFIAPI InitializeExceptionStackSwitchHandlers ( IN OUT VOID Buffer)

Initializes CPU exceptions handlers for the sake of stack switch requirement.

This function is a wrapper of InitializeSeparateExceptionStacks. It's mainly for the sake of AP's init because of EFI_AP_PROCEDURE API requirement.

Parameters
[in,out]BufferThe pointer to private data buffer.

Definition at line 628 of file CpuMp.c.

◆ InitializeMpExceptionHandlers()

VOID InitializeMpExceptionHandlers ( VOID  )

Initializes MP exceptions handlers for special features, such as Heap Guard and Stack Guard.

Definition at line 791 of file CpuMp.c.

◆ InitializeMpExceptionStackSwitchHandlers()

VOID InitializeMpExceptionStackSwitchHandlers ( VOID  )

Initializes MP exceptions handlers for the sake of stack switch requirement.

This function will allocate required resources required to setup stack switch and pass them through CPU_EXCEPTION_INIT_DATA to each logic processor.

Definition at line 656 of file CpuMp.c.

◆ InitializeMpSupport()

VOID InitializeMpSupport ( VOID  )

Initialize Multi-processor support.

Definition at line 817 of file CpuMp.c.

◆ StartupAllAPs()

EFI_STATUS EFIAPI StartupAllAPs ( IN EFI_MP_SERVICES_PROTOCOL This,
IN EFI_AP_PROCEDURE  Procedure,
IN BOOLEAN  SingleThread,
IN EFI_EVENT WaitEvent  OPTIONAL,
IN UINTN  TimeoutInMicroseconds,
IN VOID *ProcedureArgument  OPTIONAL,
OUT UINTN **FailedCpuList  OPTIONAL 
)

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 and non-blocking requests. The non-blocking requests use EFI events so the BSP can detect when the APs have finished. 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 WaitEvent is NULL, execution is in blocking mode. The BSP waits until all APs finish or TimeoutInMicroseconds expires. Otherwise, execution is in non-blocking mode, and the BSP returns from this service without waiting for APs. If a non-blocking mode is requested after the UEFI Event EFI_EVENT_GROUP_READY_TO_BOOT is signaled, then EFI_UNSUPPORTED must be returned.

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_MP_SERVICES_PROTOCOL.StartupAllAPs() and EFI_MP_SERVICES_PROTOCOL.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_MP_SERVICES_PROTOCOL.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 Protocol 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. EFI services and protocols may not be called by APs unless otherwise specified.

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

In non-blocking execution mode, BSP is freed to return to the caller and then proceed to the next task without having to wait for APs. The following sequence needs to occur in a non-blocking execution mode:

  1. The caller that intends to use this MP Services Protocol in non-blocking mode creates WaitEvent by calling the EFI CreateEvent() service. The caller invokes EFI_MP_SERVICES_PROTOCOL.StartupAllAPs(). If the parameter WaitEvent is not NULL, then StartupAllAPs() executes in non-blocking mode. It requests the function specified by Procedure to be started on all the enabled APs, and releases the BSP to continue with other tasks.
  2. The caller can use the CheckEvent() and WaitForEvent() services to check the state of the WaitEvent created in step 1.
  3. When the APs complete their task or TimeoutInMicroSeconds expires, the MP Service signals WaitEvent by calling the EFI SignalEvent() function. If FailedCpuList is not NULL, its content is available when WaitEvent is signaled. If all APs returned from Procedure prior to the timeout, then FailedCpuList is set to NULL. If not all APs return from Procedure before the timeout, then FailedCpuList is filled in with the list of the failed APs. The buffer is allocated by MP Service Protocol using AllocatePool(). It is the caller's responsibility to free the buffer with FreePool() service.
  4. This invocation of SignalEvent() function informs the caller that invoked EFI_MP_SERVICES_PROTOCOL.StartupAllAPs() that either all the APs completed the specified task or a timeout occurred. The contents of FailedCpuList can be examined to determine which APs did not complete the specified task prior to the timeout.
Parameters
[in]ThisA pointer to the EFI_MP_SERVICES_PROTOCOL instance.
[in]ProcedureA pointer to the function to be run on enabled APs of the system. See type EFI_AP_PROCEDURE.
[in]SingleThreadIf 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.
[in]WaitEventThe event created by the caller with CreateEvent() service. If it is NULL, then execute in blocking mode. BSP waits until all APs finish or TimeoutInMicroseconds expires. If it's not NULL, then execute in non-blocking mode. BSP requests the function specified by Procedure to be started on all the enabled APs, and go on executing immediately. If all return from Procedure, or TimeoutInMicroseconds expires, this event is signaled. The BSP can use the CheckEvent() or WaitForEvent() services to check the state of event. Type EFI_EVENT is defined in CreateEvent() in the Unified Extensible Firmware Interface Specification.
[in]TimeoutInMicrosecondsIndicates the time limit in microseconds for APs to return from Procedure, either for blocking or non-blocking mode. 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_MP_SERVICES_PROTOCOL.StartupAllAPs() or EFI_MP_SERVICES_PROTOCOL.StartupThisAP(). If the timeout expires in blocking mode, BSP returns EFI_TIMEOUT. If the timeout expires in non-blocking mode, WaitEvent is signaled with SignalEvent().
[in]ProcedureArgumentThe parameter passed into Procedure for all APs.
[out]FailedCpuListIf NULL, this parameter is ignored. Otherwise, if all APs finish successfully, then its content is set to NULL. If not all APs finish before timeout expires, then its content is set to address of the buffer holding handle numbers of the failed APs. The buffer is allocated by MP Service Protocol, and it's the caller's responsibility to free the buffer with FreePool() service. In blocking mode, it is ready for consumption when the call returns. In non-blocking mode, it is ready when WaitEvent is signaled. The list of failed CPU is terminated by END_OF_CPU_LIST.
Return values
EFI_SUCCESSIn blocking mode, all APs have finished before the timeout expired.
EFI_SUCCESSIn non-blocking mode, function has been dispatched to all enabled APs.
EFI_UNSUPPORTEDA non-blocking mode request was made after the UEFI event EFI_EVENT_GROUP_READY_TO_BOOT was signaled.
EFI_DEVICE_ERRORCaller processor is AP.
EFI_NOT_STARTEDNo enabled APs exist in the system.
EFI_NOT_READYAny enabled APs are busy.
EFI_TIMEOUTIn blocking mode, the timeout expired before all enabled APs have finished.
EFI_INVALID_PARAMETERProcedure is NULL.

Definition at line 254 of file CpuMp.c.

◆ StartupThisAP()

EFI_STATUS EFIAPI StartupThisAP ( IN EFI_MP_SERVICES_PROTOCOL This,
IN EFI_AP_PROCEDURE  Procedure,
IN UINTN  ProcessorNumber,
IN EFI_EVENT WaitEvent  OPTIONAL,
IN UINTN  TimeoutInMicroseconds,
IN VOID *ProcedureArgument  OPTIONAL,
OUT BOOLEAN *Finished  OPTIONAL 
)

This service lets the caller get one enabled AP to execute a caller-provided function. The caller can request the BSP to either wait for the completion of the AP or just proceed with the next task by using the EFI event mechanism. See EFI_MP_SERVICES_PROTOCOL.StartupAllAPs() for more details on non-blocking execution support. 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. If WaitEvent is NULL, execution is in blocking mode. The BSP waits until the AP finishes or TimeoutInMicroSeconds expires. Otherwise, execution is in non-blocking mode. BSP proceeds to the next task without waiting for the AP. If a non-blocking mode is requested after the UEFI Event EFI_EVENT_GROUP_READY_TO_BOOT is signaled, then EFI_UNSUPPORTED must be returned.

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_MP_SERVICES_PROTOCOL.StartupAllAPs() and EFI_MP_SERVICES_PROTOCOL.StartupThisAP().

Parameters
[in]ThisA pointer to the EFI_MP_SERVICES_PROTOCOL instance.
[in]ProcedureA pointer to the function to be run on the designated AP of the system. See type EFI_AP_PROCEDURE.
[in]ProcessorNumberThe 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_MP_SERVICES_PROTOCOL.GetNumberOfProcessors().
[in]WaitEventThe event created by the caller with CreateEvent() service. If it is NULL, then execute in blocking mode. BSP waits until this AP finish or TimeoutInMicroSeconds expires. If it's not NULL, then execute in non-blocking mode. BSP requests the function specified by Procedure to be started on this AP, and go on executing immediately. If this AP return from Procedure or TimeoutInMicroSeconds expires, this event is signaled. The BSP can use the CheckEvent() or WaitForEvent() services to check the state of event. Type EFI_EVENT is defined in CreateEvent() in the Unified Extensible Firmware Interface Specification.
[in]TimeoutInMicrosecondsIndicates the time limit in microseconds for this AP to finish this Procedure, either for blocking or non-blocking mode. Zero means infinity. If the timeout expires before this AP returns from Procedure, then Procedure on the AP is terminated. The AP is available for next function assigned by EFI_MP_SERVICES_PROTOCOL.StartupAllAPs() or EFI_MP_SERVICES_PROTOCOL.StartupThisAP(). If the timeout expires in blocking mode, BSP returns EFI_TIMEOUT. If the timeout expires in non-blocking mode, WaitEvent is signaled with SignalEvent().
[in]ProcedureArgumentThe parameter passed into Procedure on the specified AP.
[out]FinishedIf NULL, this parameter is ignored. In blocking mode, this parameter is ignored. In non-blocking mode, if AP returns from Procedure before the timeout expires, its content is set to TRUE. Otherwise, the value is set to FALSE. The caller can determine if the AP returned from Procedure by evaluating this value.
Return values
EFI_SUCCESSIn blocking mode, specified AP finished before the timeout expires.
EFI_SUCCESSIn non-blocking mode, the function has been dispatched to specified AP.
EFI_UNSUPPORTEDA non-blocking mode request was made after the UEFI event EFI_EVENT_GROUP_READY_TO_BOOT was signaled.
EFI_DEVICE_ERRORThe calling processor is an AP.
EFI_TIMEOUTIn blocking mode, the timeout expired before the specified AP has finished.
EFI_NOT_READYThe specified AP is busy.
EFI_NOT_FOUNDThe processor with the handle specified by ProcessorNumber does not exist.
EFI_INVALID_PARAMETERProcessorNumber specifies the BSP or disabled AP.
EFI_INVALID_PARAMETERProcedure is NULL.

Definition at line 362 of file CpuMp.c.

◆ SwitchBSP()

EFI_STATUS EFIAPI SwitchBSP ( IN EFI_MP_SERVICES_PROTOCOL This,
IN UINTN  ProcessorNumber,
IN BOOLEAN  EnableOldBSP 
)

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. This service may not be supported after the UEFI Event EFI_EVENT_GROUP_READY_TO_BOOT is signaled.

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

Parameters
[in]ThisA pointer to the EFI_MP_SERVICES_PROTOCOL instance.
[in]ProcessorNumberThe handle number of AP that is to become the new BSP. 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_MP_SERVICES_PROTOCOL.GetNumberOfProcessors().
[in]EnableOldBSPIf TRUE, then the old BSP will be listed as an enabled AP. Otherwise, it will be disabled.
Return values
EFI_SUCCESSBSP successfully switched.
EFI_UNSUPPORTEDSwitching the BSP cannot be completed prior to this service returning.
EFI_UNSUPPORTEDSwitching the BSP is not supported.
EFI_DEVICE_ERRORThe calling processor is an AP.
EFI_NOT_FOUNDThe processor with the handle specified by ProcessorNumber does not exist.
EFI_INVALID_PARAMETERProcessorNumber specifies the current BSP or a disabled AP.
EFI_NOT_READYThe specified AP is busy.

Definition at line 419 of file CpuMp.c.

◆ WhoAmI()

EFI_STATUS EFIAPI WhoAmI ( IN EFI_MP_SERVICES_PROTOCOL This,
OUT UINTN ProcessorNumber 
)

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_MP_SERVICES_PROTOCOL.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.

Parameters
[in]ThisA pointer to the EFI_MP_SERVICES_PROTOCOL instance.
[out]ProcessorNumberPointer to the handle number of 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_MP_SERVICES_PROTOCOL.GetNumberOfProcessors().
Return values
EFI_SUCCESSThe current processor handle number was returned in ProcessorNumber.
EFI_INVALID_PARAMETERProcessorNumber is NULL.

Definition at line 507 of file CpuMp.c.

Variable Documentation

◆ mMpServiceHandle

EFI_HANDLE mMpServiceHandle = NULL

Definition at line 12 of file CpuMp.c.

◆ mMpServicesTemplate

EFI_MP_SERVICES_PROTOCOL mMpServicesTemplate
Initial value:
= {
}
EFI_STATUS EFIAPI StartupThisAP(IN EFI_MP_SERVICES_PROTOCOL *This, IN EFI_AP_PROCEDURE Procedure, IN UINTN ProcessorNumber, IN EFI_EVENT WaitEvent OPTIONAL, IN UINTN TimeoutInMicroseconds, IN VOID *ProcedureArgument OPTIONAL, OUT BOOLEAN *Finished OPTIONAL)
Definition: CpuMp.c:362
EFI_STATUS EFIAPI EnableDisableAP(IN EFI_MP_SERVICES_PROTOCOL *This, IN UINTN ProcessorNumber, IN BOOLEAN EnableAP, IN UINT32 *HealthFlag OPTIONAL)
Definition: CpuMp.c:471
EFI_STATUS EFIAPI WhoAmI(IN EFI_MP_SERVICES_PROTOCOL *This, OUT UINTN *ProcessorNumber)
Definition: CpuMp.c:507
EFI_STATUS EFIAPI StartupAllAPs(IN EFI_MP_SERVICES_PROTOCOL *This, IN EFI_AP_PROCEDURE Procedure, IN BOOLEAN SingleThread, IN EFI_EVENT WaitEvent OPTIONAL, IN UINTN TimeoutInMicroseconds, IN VOID *ProcedureArgument OPTIONAL, OUT UINTN **FailedCpuList OPTIONAL)
Definition: CpuMp.c:254
EFI_STATUS EFIAPI GetNumberOfProcessors(IN EFI_MP_SERVICES_PROTOCOL *This, OUT UINTN *NumberOfProcessors, OUT UINTN *NumberOfEnabledProcessors)
Definition: CpuMp.c:63
EFI_STATUS EFIAPI SwitchBSP(IN EFI_MP_SERVICES_PROTOCOL *This, IN UINTN ProcessorNumber, IN BOOLEAN EnableOldBSP)
Definition: CpuMp.c:419
EFI_STATUS EFIAPI GetProcessorInfo(IN EFI_MP_SERVICES_PROTOCOL *This, IN UINTN ProcessorNumber, OUT EFI_PROCESSOR_INFORMATION *ProcessorInfoBuffer)
Definition: CpuMp.c:107

Definition at line 15 of file CpuMp.c.

◆ mNumberOfProcessors

UINTN mNumberOfProcessors = 1

Definition at line 13 of file CpuMp.c.