+/**
+ This function will be called from AP reset code if BSP uses WakeUpAP.
+
+ @param ExchangeInfo Pointer to the MP exchange info buffer
+ @param NumApsExecuting Number of curret executing AP
+**/
+VOID
+EFIAPI
+ApCFunction (
+ IN MP_CPU_EXCHANGE_INFO *ExchangeInfo,
+ IN UINTN NumApsExecuting
+ )
+{
+ PEI_CPU_MP_DATA *PeiCpuMpData;
+ UINTN BistData;
+
+ PeiCpuMpData = ExchangeInfo->PeiCpuMpData;
+ if (PeiCpuMpData->InitFlag) {
+ //
+ // This is first time AP wakeup, get BIST inforamtion from AP stack
+ //
+ BistData = *(UINTN *) (PeiCpuMpData->Buffer + NumApsExecuting * PeiCpuMpData->CpuApStackSize - sizeof (UINTN));
+ PeiCpuMpData->CpuData[NumApsExecuting].ApicId = GetInitialApicId ();
+ PeiCpuMpData->CpuData[NumApsExecuting].Health.Uint32 = (UINT32) BistData;
+ }
+
+ //
+ // AP finished executing C code
+ //
+ InterlockedIncrement ((UINT32 *)&PeiCpuMpData->FinishedCount);
+
+}
+
+/**
+ This function will be called by BSP to wakeup AP.
+
+ @param PeiCpuMpData Pointer to PEI CPU MP Data
+ @param Broadcast TRUE: Send broadcast IPI to all APs
+ FALSE: Send IPI to AP by ApicId
+ @param ApicId Apic ID for the processor to be waked
+ @param Procedure The function to be invoked by AP
+ @param ProcedureArgument The argument to be passed into AP function
+**/
+VOID
+WakeUpAP (
+ IN PEI_CPU_MP_DATA *PeiCpuMpData,
+ IN BOOLEAN Broadcast,
+ IN UINT32 ApicId,
+ IN EFI_AP_PROCEDURE Procedure, OPTIONAL
+ IN VOID *ProcedureArgument OPTIONAL
+ )
+{
+ volatile MP_CPU_EXCHANGE_INFO *ExchangeInfo;
+
+ PeiCpuMpData->ApFunction = (UINTN) Procedure;
+ PeiCpuMpData->ApFunctionArgument = (UINTN) ProcedureArgument;
+ PeiCpuMpData->FinishedCount = 0;
+
+ ExchangeInfo = PeiCpuMpData->MpCpuExchangeInfo;
+ ExchangeInfo->Lock = 0;
+ ExchangeInfo->StackStart = PeiCpuMpData->Buffer;
+ ExchangeInfo->StackSize = PeiCpuMpData->CpuApStackSize;
+ ExchangeInfo->BufferStart = PeiCpuMpData->WakeupBuffer;
+ ExchangeInfo->PmodeOffset = PeiCpuMpData->AddressMap.PModeEntryOffset;
+ ExchangeInfo->LmodeOffset = PeiCpuMpData->AddressMap.LModeEntryOffset;
+ ExchangeInfo->Cr3 = AsmReadCr3 ();
+ ExchangeInfo->CFunction = (UINTN) ApCFunction;
+ ExchangeInfo->NumApsExecuting = 0;
+ ExchangeInfo->PeiCpuMpData = PeiCpuMpData;
+
+ //
+ // Get the BSP's data of GDT and IDT
+ //
+ CopyMem ((VOID *)&ExchangeInfo->GdtrProfile, &mGdt, sizeof(mGdt));
+ AsmReadIdtr ((IA32_DESCRIPTOR *) &ExchangeInfo->IdtrProfile);
+
+ if (Broadcast) {
+ SendInitSipiSipiAllExcludingSelf ((UINT32) ExchangeInfo->BufferStart);
+ } else {
+ SendInitSipiSipi (ApicId, (UINT32) ExchangeInfo->BufferStart);
+ }
+
+ return ;
+}
+