Add assembly code for AP reset vector and the definition of MP_CPU_EXCHANGE_INFO that are used to exchange the data between C code and assembly code when AP wake up. v4: 1. Copy

1. Rename NumApsExecutingLoction to NumApsExecutingLocation 2. Update some comments in NASM files. 3. Remove PeiCpuMpData from MP_CPU_EXCHANGE_INFO. Cc: Feng Tian <feng.tian@...> Cc: Giri P

EnableExecuteDisable in MP_CPU_EXCHANGE_INFO is used to tell AP reset vector if enable execute disable feature on APs. This feature should be enabled before CR3 is written. Cc: Feng Tian

AsmRelocateApLoop() is used to place APs into MWAIT-loop if MonitorMwait feature is supported before hand-off to OS, or place APs into HLT-loop if MonitorMwait feature is not supported. If the

In MpInitLibInitialize(), invoke AsmGetAddress() to get get assembly functions' entry addresses and the sizes from returned MP_ASSEMBLY_ADDRESS_MAP structure. v4: 1. Add AsmRelocateApLoop

Firstly, get ApLoopMode from PcdCpuApLoopMode. If MonitorMwait feature is not supported, update ApLoopMode to ApHltLoop. If MonitorMwait feature is supported, get MointorFilter size by

Cc: Feng Tian <feng.tian@...> Cc: Giri P Mudusuru <giri.p.mudusuru@...> Cc: Laszlo Ersek <lersek@...> Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Jeff Fan

Initialize CPU_AP_DATA for CPU APs and add GetApState()/SetApState() helper functions to get/set AP state. Cc: Feng Tian <feng.tian@...> Cc: Giri P Mudusuru <giri.p.mudusuru@...> Cc:

Add CPU_VOLATILE_REGISTERS definitions for CRx and DRx required to be restored after APs received INIT IPI. Add worker functions SaveVolatileRegisters()/RestoreVolatileRegisters() used

v4: 1. ProcessorSignature is updated to CPU_MICROCODE_PROCESSOR_SIGNATURE instead of UINT32. Cc: Feng Tian <feng.tian@...> Cc: Giri P Mudusuru <giri.p.mudusuru@...> Cc: Laszlo

In PeiMpInitLib, save CPU MP Data pointer into one local Guided HOB. In DxeMpInitLib, save CPU MP Data pointer into one global variable. Add helper functions GetCpuMpData()/SaveCpuMpData(). Cc: Feng

In PeiMpInitLib, register End of PEI callback function CpuMpEndOfPeiCallback(). Cc: Feng Tian <feng.tian@...> Cc: Giri P Mudusuru <giri.p.mudusuru@...> Cc: Laszlo Ersek

In DxeMpInitLib, register one period event callback function CheckAPsStatus() used to check AP Status. v3: 1. Use CamelCase for mCheckAllAPsEvent, mStopCheckAllApsStatus and

In PeiMpInitLib, searching unallocated memory under in EFI_HOB_TYPE_RESOURCE_DESCRIPTOR hobs to find the memory under 1MB for AP reset vector. After End of PEI event triggered, we need to restore

ApCFunction() is the first C function executed from AP reset vector. When APs waken up at the first time, it will sync BSP's MTRR setting and load microcode on APs and collect APs' BIST

FillExchangeInfoData() is used to fill MP_CPU_EXCHANGE_INFO date exchanged between C code and assembly code of AP reset vector. Cc: Feng Tian <feng.tian@...> Cc: Giri P Mudusuru

WakeUpAP() is used to wakeup APs per current ApLoopMode and make sure APs wake up successfully. Cc: Feng Tian <feng.tian@...> Cc: Giri P Mudusuru <giri.p.mudusuru@...> Cc: Laszlo Ersek

CollectProcessorCount() will send the 1st INIT-SIPI-SIPI to get processor count in system. Cc: Feng Tian <feng.tian@...> Cc: Giri P Mudusuru <giri.p.mudusuru@...> Cc: Laszlo Ersek

If x2APIC flag is set, enable x2APIC mode on all APs and BSP. Before we wakeup APs to enable x2APIC mode, we should wait all APs have finished initialization. Cc: Feng Tian <feng.tian@...> Cc:

Cc: Feng Tian <feng.tian@...> Cc: Giri P Mudusuru <giri.p.mudusuru@...> Cc: Laszlo Ersek <lersek@...> Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Jeff Fan