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/** @file
Functions prototype of Multiple Processor PPI services.
Copyright (c) 2015, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/
#ifndef _PEI_MP_SERVICES_H_
#define _PEI_MP_SERVICES_H_
#include "CpuMpPei.h"
/**
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
);
/**
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
);
#endif
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