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UefiCpuPkg/MpInitLib: Implementation of MpInitLibGetNumberOfProcessors()

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Cc: Michael Kinney <michael.d.kinney@intel.com>
Cc: Feng Tian <feng.tian@intel.com>
Cc: Giri P Mudusuru <giri.p.mudusuru@intel.com>
Cc: Laszlo Ersek <lersek@redhat.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jeff Fan <jeff.fan@intel.com>
Reviewed-by: Michael Kinney <michael.d.kinney@intel.com>
Tested-by: Laszlo Ersek <lersek@redhat.com>
Tested-by: Michael Kinney <michael.d.kinney@intel.com>
This commit is contained in:
Jeff Fan
2016-07-21 00:34:19 +08:00
parent 6a2ee2bb63
commit 809213a679
1 changed files with 38 additions and 1 deletions
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39
UefiCpuPkg/Library/MpInitLib/MpLib.c
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@ -956,6 +956,7 @@ MpInitLibWhoAmI (
{ {
return EFI_UNSUPPORTED; return EFI_UNSUPPORTED;
} }
/** /**
Retrieves the number of logical processor in the platform and the number of 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 those logical processors that are enabled on this boot. This service may only
@ -983,9 +984,45 @@ MpInitLibGetNumberOfProcessors (
OUT UINTN *NumberOfEnabledProcessors OPTIONAL OUT UINTN *NumberOfEnabledProcessors OPTIONAL
) )
{ {
return EFI_UNSUPPORTED; CPU_MP_DATA *CpuMpData;
UINTN CallerNumber;
UINTN ProcessorNumber;
UINTN EnabledProcessorNumber;
UINTN Index;
CpuMpData = GetCpuMpData ();
if ((NumberOfProcessors == NULL) && (NumberOfEnabledProcessors == NULL)) {
return EFI_INVALID_PARAMETER;
}
//
// Check whether caller processor is BSP
//
MpInitLibWhoAmI (&CallerNumber);
if (CallerNumber != CpuMpData->BspNumber) {
return EFI_DEVICE_ERROR;
}
ProcessorNumber = CpuMpData->CpuCount;
EnabledProcessorNumber = 0;
for (Index = 0; Index < ProcessorNumber; Index++) {
if (GetApState (&CpuMpData->CpuData[Index]) != CpuStateDisabled) {
EnabledProcessorNumber ++;
}
}
if (NumberOfProcessors != NULL) {
*NumberOfProcessors = ProcessorNumber;
}
if (NumberOfEnabledProcessors != NULL) {
*NumberOfEnabledProcessors = EnabledProcessorNumber;
}
return EFI_SUCCESS;
} }
/** /**
Get pointer to CPU MP Data structure from GUIDed HOB. Get pointer to CPU MP Data structure from GUIDed HOB.