mirror of https://github.com/acidanthera/audk.git
UefiCpuPkg/CpuMpPei: Implementation of PeiGetNumberOfProcessors ()
Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Jeff Fan <jeff.fan@intel.com> Reviewed-by: Feng Tian <feng.tian@intel.com> Reviewed-by: Jiewen Yao <jiewen.yao@intel.com> git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@18006 6f19259b-4bc3-4df7-8a09-765794883524
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@ -44,6 +44,85 @@ GetProcessorNumber (
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return EFI_NOT_FOUND;
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return EFI_NOT_FOUND;
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}
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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 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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{
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PEI_CPU_MP_DATA *PeiCpuMpData;
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UINTN CallerNumber;
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UINTN ProcessorNumber;
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UINTN EnabledProcessorNumber;
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UINTN Index;
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PeiCpuMpData = GetMpHobData ();
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if (PeiCpuMpData == NULL) {
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return EFI_NOT_FOUND;
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}
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if ((NumberOfProcessors == NULL) || (NumberOfEnabledProcessors == NULL)) {
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return EFI_INVALID_PARAMETER;
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}
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//
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// Check whether caller processor is BSP
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//
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PeiWhoAmI (PeiServices, This, &CallerNumber);
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if (CallerNumber != PeiCpuMpData->BspNumber) {
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return EFI_DEVICE_ERROR;
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}
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ProcessorNumber = PeiCpuMpData->CpuCount;
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EnabledProcessorNumber = 0;
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for (Index = 0; Index < ProcessorNumber; Index++) {
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if (PeiCpuMpData->CpuData[Index].State != CpuStateDisabled) {
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EnabledProcessorNumber ++;
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}
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}
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*NumberOfProcessors = ProcessorNumber;
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*NumberOfEnabledProcessors = EnabledProcessorNumber;
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return EFI_SUCCESS;
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}
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/**
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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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This return the handle number for the calling processor. This service may be
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@ -17,6 +17,49 @@
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#include "CpuMpPei.h"
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#include "CpuMpPei.h"
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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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/**
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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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This return the handle number for the calling processor. This service may be
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