2015-07-15 05:41:59 +02:00
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/** @file
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Functions prototype of Multiple Processor PPI services.
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Copyright (c) 2015, Intel Corporation. All rights reserved.<BR>
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This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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**/
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#ifndef _PEI_MP_SERVICES_H_
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#define _PEI_MP_SERVICES_H_
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#include "CpuMpPei.h"
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2015-07-15 05:43:12 +02:00
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#define CPU_CHECK_AP_INTERVAL 0x100 // 100 microseconds
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2015-07-15 05:42:22 +02:00
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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 Ppi 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] PeiServices An indirect pointer to the PEI Services Table
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published by the PEI Foundation.
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@param[in] This Pointer to this instance of the PPI.
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@param[out] NumberOfProcessors Pointer to the total number of logical processors in
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the system, including the BSP and disabled APs.
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@param[out] NumberOfEnabledProcessors
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Number of processors in the system that are enabled.
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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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NumberOfEnabledProcessors is NULL.
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**/
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EFI_STATUS
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EFIAPI
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PeiGetNumberOfProcessors (
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IN CONST EFI_PEI_SERVICES **PeiServices,
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IN EFI_PEI_MP_SERVICES_PPI *This,
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OUT UINTN *NumberOfProcessors,
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OUT UINTN *NumberOfEnabledProcessors
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);
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2015-07-15 05:42:45 +02:00
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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] PeiServices An indirect pointer to the PEI Services Table
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published by the PEI Foundation.
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@param[in] This Pointer to this instance of the PPI.
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@param[in] ProcessorNumber Pointer to the total number of logical processors in
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the system, including the BSP and disabled APs.
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@param[out] ProcessorInfoBuffer Number of processors in the system that are enabled.
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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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PeiGetProcessorInfo (
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IN CONST EFI_PEI_SERVICES **PeiServices,
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IN EFI_PEI_MP_SERVICES_PPI *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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2015-07-15 05:43:12 +02:00
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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 requests only. 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 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_PEI_MP_SERVICES_PPI.StartupAllAPs()
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and EFI_PEI_MP_SERVICES_PPI.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_PEI_MP_SERVICES_PPI.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 Ppi 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. PEI services and Ppis 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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@param[in] PeiServices An indirect pointer to the PEI Services Table
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published by the PEI Foundation.
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@param[in] This A pointer to the EFI_PEI_MP_SERVICES_PPI instance.
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@param[in] Procedure A pointer to the function to be run on enabled APs of
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the system.
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@param[in] SingleThread If TRUE, then all the enabled APs execute the function
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specified by Procedure one by one, in ascending order
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of processor handle number. If FALSE, then all the
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enabled APs execute the function specified by Procedure
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simultaneously.
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@param[in] TimeoutInMicroSeconds
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Indicates the time limit in microseconds for APs to
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return from Procedure, for blocking mode only. Zero
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means infinity. If the timeout expires before all APs
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return from Procedure, then Procedure on the failed APs
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is terminated. All enabled APs are available for next
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function assigned by EFI_PEI_MP_SERVICES_PPI.StartupAllAPs()
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or EFI_PEI_MP_SERVICES_PPI.StartupThisAP(). If the
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timeout expires in blocking mode, BSP returns
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EFI_TIMEOUT.
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@param[in] ProcedureArgument The parameter passed into Procedure for all APs.
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@retval EFI_SUCCESS In blocking mode, all APs have finished before the
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timeout expired.
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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 all
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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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PeiStartupAllAPs (
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IN CONST EFI_PEI_SERVICES **PeiServices,
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IN EFI_PEI_MP_SERVICES_PPI *This,
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IN EFI_AP_PROCEDURE Procedure,
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IN BOOLEAN SingleThread,
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IN UINTN TimeoutInMicroSeconds,
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IN VOID *ProcedureArgument OPTIONAL
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);
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2015-07-15 05:41:59 +02:00
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/**
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This return the handle number for the calling processor. This service may be
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called from the BSP and APs.
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This service returns the processor handle number for the calling processor.
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The returned value is in the range from 0 to the total number of logical
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processors minus 1. The total number of logical processors can be retrieved
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with EFI_PEI_MP_SERVICES_PPI.GetNumberOfProcessors(). This service may be
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called from the BSP and APs. If ProcessorNumber is NULL, then EFI_INVALID_PARAMETER
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is returned. Otherwise, the current processors handle number is returned in
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ProcessorNumber, and EFI_SUCCESS is returned.
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@param[in] PeiServices An indirect pointer to the PEI Services Table
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published by the PEI Foundation.
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@param[in] This A pointer to the EFI_PEI_MP_SERVICES_PPI instance.
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@param[out] ProcessorNumber The handle number of the AP. The range is from 0 to the
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total number of logical processors minus 1. The total
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number of logical processors can be retrieved by
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EFI_PEI_MP_SERVICES_PPI.GetNumberOfProcessors().
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@retval EFI_SUCCESS The current processor handle number was returned in
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ProcessorNumber.
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@retval EFI_INVALID_PARAMETER ProcessorNumber is NULL.
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**/
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EFI_STATUS
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EFIAPI
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PeiWhoAmI (
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IN CONST EFI_PEI_SERVICES **PeiServices,
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IN EFI_PEI_MP_SERVICES_PPI *This,
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OUT UINTN *ProcessorNumber
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);
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#endif
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