471 lines
26 KiB
C
471 lines
26 KiB
C
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/** @file
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CPU DXE MP support
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Copyright (c) 2006 - 2016, Intel Corporation. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#ifndef _CPU_MP_H_
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#define _CPU_MP_H_
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/**
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Initialize Multi-processor support.
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**/
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VOID
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InitializeMpSupport (
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VOID
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);
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/**
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This service retrieves the number of logical processor in the platform
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and the number of those logical processors that are enabled on this boot.
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This service may only be called from the BSP.
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This function is used to retrieve the following information:
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- The number of logical processors that are present in the system.
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- The number of enabled logical processors in the system at the instant
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this call is made.
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Because MP Service Protocol provides services to enable and disable processors
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dynamically, the number of enabled logical processors may vary during the
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course of a boot session.
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If this service is called from an AP, then EFI_DEVICE_ERROR is returned.
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If NumberOfProcessors or NumberOfEnabledProcessors is NULL, then
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EFI_INVALID_PARAMETER is returned. Otherwise, the total number of processors
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is returned in NumberOfProcessors, the number of currently enabled processor
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is returned in NumberOfEnabledProcessors, and EFI_SUCCESS is returned.
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@param[in] This A pointer to the EFI_MP_SERVICES_PROTOCOL
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instance.
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@param[out] NumberOfProcessors Pointer to the total number of logical
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processors in the system, including the BSP
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and disabled APs.
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@param[out] NumberOfEnabledProcessors Pointer to the number of enabled logical
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processors that exist in system, including
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the BSP.
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@retval EFI_SUCCESS The number of logical processors and enabled
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logical processors was retrieved.
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@retval EFI_DEVICE_ERROR The calling processor is an AP.
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@retval EFI_INVALID_PARAMETER NumberOfProcessors is NULL.
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@retval EFI_INVALID_PARAMETER NumberOfEnabledProcessors is NULL.
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**/
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EFI_STATUS
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EFIAPI
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GetNumberOfProcessors (
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IN EFI_MP_SERVICES_PROTOCOL *This,
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OUT UINTN *NumberOfProcessors,
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OUT UINTN *NumberOfEnabledProcessors
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);
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/**
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Gets detailed MP-related information on the requested processor at the
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instant this call is made. This service may only be called from the BSP.
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This service retrieves detailed MP-related information about any processor
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on the platform. Note the following:
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- The processor information may change during the course of a boot session.
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- The information presented here is entirely MP related.
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Information regarding the number of caches and their sizes, frequency of operation,
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slot numbers is all considered platform-related information and is not provided
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by this service.
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@param[in] This A pointer to the EFI_MP_SERVICES_PROTOCOL
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instance.
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@param[in] ProcessorNumber The handle number of processor.
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@param[out] ProcessorInfoBuffer A pointer to the buffer where information for
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the requested processor is deposited.
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@retval EFI_SUCCESS Processor information was returned.
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@retval EFI_DEVICE_ERROR The calling processor is an AP.
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@retval EFI_INVALID_PARAMETER ProcessorInfoBuffer is NULL.
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@retval EFI_NOT_FOUND The processor with the handle specified by
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ProcessorNumber does not exist in the platform.
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**/
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EFI_STATUS
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EFIAPI
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GetProcessorInfo (
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IN EFI_MP_SERVICES_PROTOCOL *This,
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IN UINTN ProcessorNumber,
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OUT EFI_PROCESSOR_INFORMATION *ProcessorInfoBuffer
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);
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/**
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This service executes a caller provided function on all enabled APs. APs can
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run either simultaneously or one at a time in sequence. This service supports
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both blocking and non-blocking requests. The non-blocking requests use EFI
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events so the BSP can detect when the APs have finished. This service may only
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be called from the BSP.
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This function is used to dispatch all the enabled APs to the function specified
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by Procedure. If any enabled AP is busy, then EFI_NOT_READY is returned
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immediately and Procedure is not started on any AP.
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If SingleThread is TRUE, all the enabled APs execute the function specified by
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Procedure one by one, in ascending order of processor handle number. Otherwise,
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all the enabled APs execute the function specified by Procedure simultaneously.
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If WaitEvent is NULL, execution is in blocking mode. The BSP waits until all
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APs finish or TimeoutInMicroseconds expires. Otherwise, execution is in non-blocking
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mode, and the BSP returns from this service without waiting for APs. If a
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non-blocking mode is requested after the UEFI Event EFI_EVENT_GROUP_READY_TO_BOOT
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is signaled, then EFI_UNSUPPORTED must be returned.
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If the timeout specified by TimeoutInMicroseconds expires before all APs return
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from Procedure, then Procedure on the failed APs is terminated. All enabled APs
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are always available for further calls to EFI_MP_SERVICES_PROTOCOL.StartupAllAPs()
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and EFI_MP_SERVICES_PROTOCOL.StartupThisAP(). If FailedCpuList is not NULL, its
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content points to the list of processor handle numbers in which Procedure was
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terminated.
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Note: It is the responsibility of the consumer of the EFI_MP_SERVICES_PROTOCOL.StartupAllAPs()
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to make sure that the nature of the code that is executed on the BSP and the
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dispatched APs is well controlled. The MP Services Protocol does not guarantee
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that the Procedure function is MP-safe. Hence, the tasks that can be run in
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parallel are limited to certain independent tasks and well-controlled exclusive
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code. EFI services and protocols may not be called by APs unless otherwise
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specified.
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In blocking execution mode, BSP waits until all APs finish or
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TimeoutInMicroseconds expires.
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In non-blocking execution mode, BSP is freed to return to the caller and then
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proceed to the next task without having to wait for APs. The following
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sequence needs to occur in a non-blocking execution mode:
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-# The caller that intends to use this MP Services Protocol in non-blocking
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mode creates WaitEvent by calling the EFI CreateEvent() service. The caller
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invokes EFI_MP_SERVICES_PROTOCOL.StartupAllAPs(). If the parameter WaitEvent
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is not NULL, then StartupAllAPs() executes in non-blocking mode. It requests
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the function specified by Procedure to be started on all the enabled APs,
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and releases the BSP to continue with other tasks.
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-# The caller can use the CheckEvent() and WaitForEvent() services to check
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the state of the WaitEvent created in step 1.
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-# When the APs complete their task or TimeoutInMicroSecondss expires, the MP
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Service signals WaitEvent by calling the EFI SignalEvent() function. If
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FailedCpuList is not NULL, its content is available when WaitEvent is
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signaled. If all APs returned from Procedure prior to the timeout, then
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FailedCpuList is set to NULL. If not all APs return from Procedure before
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the timeout, then FailedCpuList is filled in with the list of the failed
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APs. The buffer is allocated by MP Service Protocol using AllocatePool().
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It is the caller's responsibility to free the buffer with FreePool() service.
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-# This invocation of SignalEvent() function informs the caller that invoked
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EFI_MP_SERVICES_PROTOCOL.StartupAllAPs() that either all the APs completed
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the specified task or a timeout occurred. The contents of FailedCpuList
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can be examined to determine which APs did not complete the specified task
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prior to the timeout.
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@param[in] This A pointer to the EFI_MP_SERVICES_PROTOCOL
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instance.
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@param[in] Procedure A pointer to the function to be run on
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enabled APs of the system. See type
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EFI_AP_PROCEDURE.
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@param[in] SingleThread If TRUE, then all the enabled APs execute
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the function specified by Procedure one by
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one, in ascending order of processor handle
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number. If FALSE, then all the enabled APs
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execute the function specified by Procedure
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simultaneously.
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@param[in] WaitEvent The event created by the caller with CreateEvent()
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service. If it is NULL, then execute in
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blocking mode. BSP waits until all APs finish
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or TimeoutInMicroseconds expires. If it's
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not NULL, then execute in non-blocking mode.
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BSP requests the function specified by
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Procedure to be started on all the enabled
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APs, and go on executing immediately. If
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all return from Procedure, or TimeoutInMicroseconds
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expires, this event is signaled. The BSP
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can use the CheckEvent() or WaitForEvent()
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services to check the state of event. Type
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EFI_EVENT is defined in CreateEvent() in
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the Unified Extensible Firmware Interface
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Specification.
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@param[in] TimeoutInMicroseconds Indicates the time limit in microseconds for
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APs to return from Procedure, either for
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blocking or non-blocking mode. Zero means
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infinity. If the timeout expires before
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all APs return from Procedure, then Procedure
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on the failed APs is terminated. All enabled
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APs are available for next function assigned
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by EFI_MP_SERVICES_PROTOCOL.StartupAllAPs()
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or EFI_MP_SERVICES_PROTOCOL.StartupThisAP().
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If the timeout expires in blocking mode,
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BSP returns EFI_TIMEOUT. If the timeout
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expires in non-blocking mode, WaitEvent
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is signaled with SignalEvent().
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@param[in] ProcedureArgument The parameter passed into Procedure for
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all APs.
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@param[out] FailedCpuList If NULL, this parameter is ignored. Otherwise,
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if all APs finish successfully, then its
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content is set to NULL. If not all APs
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finish before timeout expires, then its
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content is set to address of the buffer
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holding handle numbers of the failed APs.
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The buffer is allocated by MP Service Protocol,
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and it's the caller's responsibility to
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free the buffer with FreePool() service.
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In blocking mode, it is ready for consumption
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when the call returns. In non-blocking mode,
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it is ready when WaitEvent is signaled. The
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list of failed CPU is terminated by
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END_OF_CPU_LIST.
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@retval EFI_SUCCESS In blocking mode, all APs have finished before
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the timeout expired.
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@retval EFI_SUCCESS In non-blocking mode, function has been dispatched
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to all enabled APs.
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@retval EFI_UNSUPPORTED A non-blocking mode request was made after the
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UEFI event EFI_EVENT_GROUP_READY_TO_BOOT was
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signaled.
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@retval EFI_DEVICE_ERROR Caller processor is AP.
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@retval EFI_NOT_STARTED No enabled APs exist in the system.
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@retval EFI_NOT_READY Any enabled APs are busy.
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@retval EFI_TIMEOUT In blocking mode, the timeout expired before
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all enabled APs have finished.
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@retval EFI_INVALID_PARAMETER Procedure is NULL.
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**/
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EFI_STATUS
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EFIAPI
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StartupAllAPs (
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IN EFI_MP_SERVICES_PROTOCOL *This,
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IN EFI_AP_PROCEDURE Procedure,
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IN BOOLEAN SingleThread,
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IN EFI_EVENT WaitEvent OPTIONAL,
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IN UINTN TimeoutInMicroseconds,
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IN VOID *ProcedureArgument OPTIONAL,
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OUT UINTN **FailedCpuList OPTIONAL
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);
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/**
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This service lets the caller get one enabled AP to execute a caller-provided
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function. The caller can request the BSP to either wait for the completion
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of the AP or just proceed with the next task by using the EFI event mechanism.
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See EFI_MP_SERVICES_PROTOCOL.StartupAllAPs() for more details on non-blocking
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execution support. This service may only be called from the BSP.
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This function is used to dispatch one enabled AP to the function specified by
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Procedure passing in the argument specified by ProcedureArgument. If WaitEvent
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is NULL, execution is in blocking mode. The BSP waits until the AP finishes or
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TimeoutInMicroSecondss expires. Otherwise, execution is in non-blocking mode.
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BSP proceeds to the next task without waiting for the AP. If a non-blocking mode
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is requested after the UEFI Event EFI_EVENT_GROUP_READY_TO_BOOT is signaled,
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then EFI_UNSUPPORTED must be returned.
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If the timeout specified by TimeoutInMicroseconds expires before the AP returns
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from Procedure, then execution of Procedure by the AP is terminated. The AP is
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available for subsequent calls to EFI_MP_SERVICES_PROTOCOL.StartupAllAPs() and
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EFI_MP_SERVICES_PROTOCOL.StartupThisAP().
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@param[in] This A pointer to the EFI_MP_SERVICES_PROTOCOL
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instance.
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@param[in] Procedure A pointer to the function to be run on
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enabled APs of the system. See type
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EFI_AP_PROCEDURE.
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@param[in] ProcessorNumber The handle number of the AP. The range is
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from 0 to the total number of logical
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processors minus 1. The total number of
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logical processors can be retrieved by
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EFI_MP_SERVICES_PROTOCOL.GetNumberOfProcessors().
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@param[in] WaitEvent The event created by the caller with CreateEvent()
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service. If it is NULL, then execute in
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blocking mode. BSP waits until all APs finish
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or TimeoutInMicroseconds expires. If it's
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not NULL, then execute in non-blocking mode.
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BSP requests the function specified by
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Procedure to be started on all the enabled
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APs, and go on executing immediately. If
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all return from Procedure or TimeoutInMicroseconds
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expires, this event is signaled. The BSP
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can use the CheckEvent() or WaitForEvent()
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services to check the state of event. Type
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EFI_EVENT is defined in CreateEvent() in
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the Unified Extensible Firmware Interface
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Specification.
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@param[in] TimeoutInMicroseconds Indicates the time limit in microseconds for
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APs to return from Procedure, either for
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blocking or non-blocking mode. Zero means
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infinity. If the timeout expires before
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all APs return from Procedure, then Procedure
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on the failed APs is terminated. All enabled
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APs are available for next function assigned
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by EFI_MP_SERVICES_PROTOCOL.StartupAllAPs()
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or EFI_MP_SERVICES_PROTOCOL.StartupThisAP().
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If the timeout expires in blocking mode,
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BSP returns EFI_TIMEOUT. If the timeout
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expires in non-blocking mode, WaitEvent
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is signaled with SignalEvent().
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@param[in] ProcedureArgument The parameter passed into Procedure for
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all APs.
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@param[out] Finished If NULL, this parameter is ignored. In
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blocking mode, this parameter is ignored.
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In non-blocking mode, if AP returns from
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Procedure before the timeout expires, its
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content is set to TRUE. Otherwise, the
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value is set to FALSE. The caller can
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determine if the AP returned from Procedure
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by evaluating this value.
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@retval EFI_SUCCESS In blocking mode, specified AP finished before
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the timeout expires.
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@retval EFI_SUCCESS In non-blocking mode, the function has been
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dispatched to specified AP.
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@retval EFI_UNSUPPORTED A non-blocking mode request was made after the
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UEFI event EFI_EVENT_GROUP_READY_TO_BOOT was
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signaled.
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@retval EFI_DEVICE_ERROR The calling processor is an AP.
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@retval EFI_TIMEOUT In blocking mode, the timeout expired before
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the specified AP has finished.
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@retval EFI_NOT_READY The specified AP is busy.
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@retval EFI_NOT_FOUND The processor with the handle specified by
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ProcessorNumber does not exist.
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@retval EFI_INVALID_PARAMETER ProcessorNumber specifies the BSP or disabled AP.
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@retval EFI_INVALID_PARAMETER Procedure is NULL.
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**/
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EFI_STATUS
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EFIAPI
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StartupThisAP (
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IN EFI_MP_SERVICES_PROTOCOL *This,
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IN EFI_AP_PROCEDURE Procedure,
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IN UINTN ProcessorNumber,
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IN EFI_EVENT WaitEvent OPTIONAL,
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IN UINTN TimeoutInMicroseconds,
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|
|
IN VOID *ProcedureArgument OPTIONAL,
|
||
|
|
OUT BOOLEAN *Finished 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. 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.
|
||
|
|
|
||
|
|
@param[in] This A pointer to the EFI_MP_SERVICES_PROTOCOL instance.
|
||
|
|
@param[in] ProcessorNumber The 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().
|
||
|
|
@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
|
||
|
|
SwitchBSP (
|
||
|
|
IN EFI_MP_SERVICES_PROTOCOL *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. 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.
|
||
|
|
|
||
|
|
@param[in] This A pointer to the EFI_MP_SERVICES_PROTOCOL instance.
|
||
|
|
@param[in] ProcessorNumber The 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().
|
||
|
|
@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_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.
|
||
|
|
|
||
|
|
@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
|
||
|
|
EnableDisableAP (
|
||
|
|
IN EFI_MP_SERVICES_PROTOCOL *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_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.
|
||
|
|
|
||
|
|
@param[in] This A pointer to the EFI_MP_SERVICES_PROTOCOL instance.
|
||
|
|
@param[out] ProcessorNumber The 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().
|
||
|
|
|
||
|
|
@retval EFI_SUCCESS The current processor handle number was returned
|
||
|
|
in ProcessorNumber.
|
||
|
|
@retval EFI_INVALID_PARAMETER ProcessorNumber is NULL.
|
||
|
|
|
||
|
|
**/
|
||
|
|
EFI_STATUS
|
||
|
|
EFIAPI
|
||
|
|
WhoAmI (
|
||
|
|
IN EFI_MP_SERVICES_PROTOCOL *This,
|
||
|
|
OUT UINTN *ProcessorNumber
|
||
|
|
);
|
||
|
|
|
||
|
|
#endif // _CPU_MP_H_
|
||
|
|
|