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UefiCpuPkg/CpuMpPei: Sort APIC ID in ascending order 

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@17998 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
Jeff Fan 2015-07-15 03:38:57 +00:00 committed by vanjeff
parent 7d51bf5c4e
commit f8e4e86bc5
1 changed files with 60 additions and 0 deletions
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60
UefiCpuPkg/CpuMpPei/CpuMpPei.c
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@ -38,6 +38,62 @@ GLOBAL_REMOVE_IF_UNREFERENCED IA32_DESCRIPTOR mGdt = {
(UINTN) mGdtEntries
};
/**
Sort the APIC ID of all processors.
This function sorts the APIC ID of all processors so that processor number is
assigned in the ascending order of APIC ID which eases MP debugging.
@param PeiCpuMpData Pointer to PEI CPU MP Data
**/
VOID
SortApicId (
IN PEI_CPU_MP_DATA *PeiCpuMpData
)
{
UINTN Index1;
UINTN Index2;
UINTN Index3;
UINT32 ApicId;
EFI_HEALTH_FLAGS Health;
UINT32 ApCount;
ApCount = PeiCpuMpData->CpuCount - 1;
if (ApCount != 0) {
for (Index1 = 0; Index1 < ApCount; Index1++) {
Index3 = Index1;
//
// Sort key is the hardware default APIC ID
//
ApicId = PeiCpuMpData->CpuData[Index1].ApicId;
for (Index2 = Index1 + 1; Index2 <= ApCount; Index2++) {
if (ApicId > PeiCpuMpData->CpuData[Index2].ApicId) {
Index3 = Index2;
ApicId = PeiCpuMpData->CpuData[Index2].ApicId;
}
}
if (Index3 != Index1) {
PeiCpuMpData->CpuData[Index3].ApicId = PeiCpuMpData->CpuData[Index1].ApicId;
PeiCpuMpData->CpuData[Index1].ApicId = ApicId;
Health = PeiCpuMpData->CpuData[Index3].Health;
PeiCpuMpData->CpuData[Index3].Health = PeiCpuMpData->CpuData[Index1].Health;
PeiCpuMpData->CpuData[Index1].Health = Health;
}
}
//
// Get the processor number for the BSP
//
ApicId = GetInitialApicId ();
for (Index1 = 0; Index1 < PeiCpuMpData->CpuCount; Index1++) {
if (PeiCpuMpData->CpuData[Index1].ApicId == ApicId) {
PeiCpuMpData->BspNumber = (UINT32) Index1;
break;
}
}
}
}
/**
This function will be called from AP reset code if BSP uses WakeUpAP.
@ -240,6 +296,10 @@ CountProcessorNumber (
MicroSecondDelay (PcdGet32 (PcdCpuApInitTimeOutInMicroSeconds));
PeiCpuMpData->InitFlag = 0;
PeiCpuMpData->CpuCount += (UINT32) PeiCpuMpData->MpCpuExchangeInfo->NumApsExecuting;
//
// Sort BSP/Aps by CPU APIC ID in ascending order
//
SortApicId (PeiCpuMpData);
DEBUG ((EFI_D_INFO, "CpuMpPei: Find %d processors in system.\n", PeiCpuMpData->CpuCount));
return PeiCpuMpData->CpuCount;