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
This commit is contained in:
parent
887810c8c9
commit
a2cc8caead
|
@ -44,6 +44,85 @@ GetProcessorNumber (
|
|||
return EFI_NOT_FOUND;
|
||||
}
|
||||
|
||||
/**
|
||||
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
|
||||
)
|
||||
{
|
||||
PEI_CPU_MP_DATA *PeiCpuMpData;
|
||||
UINTN CallerNumber;
|
||||
UINTN ProcessorNumber;
|
||||
UINTN EnabledProcessorNumber;
|
||||
UINTN Index;
|
||||
|
||||
PeiCpuMpData = GetMpHobData ();
|
||||
if (PeiCpuMpData == NULL) {
|
||||
return EFI_NOT_FOUND;
|
||||
}
|
||||
|
||||
if ((NumberOfProcessors == NULL) || (NumberOfEnabledProcessors == NULL)) {
|
||||
return EFI_INVALID_PARAMETER;
|
||||
}
|
||||
|
||||
//
|
||||
// Check whether caller processor is BSP
|
||||
//
|
||||
PeiWhoAmI (PeiServices, This, &CallerNumber);
|
||||
if (CallerNumber != PeiCpuMpData->BspNumber) {
|
||||
return EFI_DEVICE_ERROR;
|
||||
}
|
||||
|
||||
ProcessorNumber = PeiCpuMpData->CpuCount;
|
||||
EnabledProcessorNumber = 0;
|
||||
for (Index = 0; Index < ProcessorNumber; Index++) {
|
||||
if (PeiCpuMpData->CpuData[Index].State != CpuStateDisabled) {
|
||||
EnabledProcessorNumber ++;
|
||||
}
|
||||
}
|
||||
|
||||
*NumberOfProcessors = ProcessorNumber;
|
||||
*NumberOfEnabledProcessors = EnabledProcessorNumber;
|
||||
|
||||
return EFI_SUCCESS;
|
||||
}
|
||||
|
||||
/**
|
||||
This return the handle number for the calling processor. This service may be
|
||||
|
|
|
@ -17,6 +17,49 @@
|
|||
|
||||
#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
|
||||
|
|
Loading…
Reference in New Issue