mirror of https://github.com/acidanthera/audk.git
798 lines
30 KiB
C
798 lines
30 KiB
C
/** @file
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MP initialize support functions for PEI phase.
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Copyright (c) 2016 - 2020, Intel Corporation. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#include "MpLib.h"
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#include <Library/PeiServicesLib.h>
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#include <Guid/S3SmmInitDone.h>
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#include <Ppi/ShadowMicrocode.h>
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STATIC UINT64 mSevEsPeiWakeupBuffer = BASE_1MB;
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/**
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S3 SMM Init Done notification function.
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@param PeiServices Indirect reference to the PEI Services Table.
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@param NotifyDesc Address of the notification descriptor data structure.
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@param InvokePpi Address of the PPI that was invoked.
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@retval EFI_SUCCESS The function completes successfully.
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**/
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EFI_STATUS
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EFIAPI
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NotifyOnS3SmmInitDonePpi (
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IN EFI_PEI_SERVICES **PeiServices,
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IN EFI_PEI_NOTIFY_DESCRIPTOR *NotifyDesc,
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IN VOID *InvokePpi
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);
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//
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// Global function
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//
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EFI_PEI_NOTIFY_DESCRIPTOR mS3SmmInitDoneNotifyDesc = {
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EFI_PEI_PPI_DESCRIPTOR_NOTIFY_CALLBACK | EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST,
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&gEdkiiS3SmmInitDoneGuid,
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NotifyOnS3SmmInitDonePpi
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};
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/**
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S3 SMM Init Done notification function.
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@param PeiServices Indirect reference to the PEI Services Table.
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@param NotifyDesc Address of the notification descriptor data structure.
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@param InvokePpi Address of the PPI that was invoked.
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@retval EFI_SUCCESS The function completes successfully.
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**/
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EFI_STATUS
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EFIAPI
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NotifyOnS3SmmInitDonePpi (
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IN EFI_PEI_SERVICES **PeiServices,
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IN EFI_PEI_NOTIFY_DESCRIPTOR *NotifyDesc,
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IN VOID *InvokePpi
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)
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{
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CPU_MP_DATA *CpuMpData;
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CpuMpData = GetCpuMpData ();
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//
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// PiSmmCpuDxeSmm driver hardcode change the loop mode to HLT mode.
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// So in this notify function, code need to check the current loop
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// mode, if it is not HLT mode, code need to change loop mode back
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// to the original mode.
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//
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if (CpuMpData->ApLoopMode != ApInHltLoop) {
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CpuMpData->WakeUpByInitSipiSipi = TRUE;
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}
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return EFI_SUCCESS;
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}
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/**
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Enable Debug Agent to support source debugging on AP function.
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**/
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VOID
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EnableDebugAgent (
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VOID
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)
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{
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}
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/**
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Get pointer to CPU MP Data structure.
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For BSP, the pointer is retrieved from HOB.
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For AP, the structure is stored in the top of each AP's stack.
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@return The pointer to CPU MP Data structure.
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**/
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CPU_MP_DATA *
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GetCpuMpData (
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VOID
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)
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{
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CPU_MP_DATA *CpuMpData;
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MSR_IA32_APIC_BASE_REGISTER ApicBaseMsr;
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UINTN ApTopOfStack;
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AP_STACK_DATA *ApStackData;
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ApicBaseMsr.Uint64 = AsmReadMsr64 (MSR_IA32_APIC_BASE);
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if (ApicBaseMsr.Bits.BSP == 1) {
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CpuMpData = GetCpuMpDataFromGuidedHob ();
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ASSERT (CpuMpData != NULL);
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} else {
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ApTopOfStack = ALIGN_VALUE ((UINTN)&ApTopOfStack, (UINTN)PcdGet32 (PcdCpuApStackSize));
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ApStackData = (AP_STACK_DATA *)((UINTN)ApTopOfStack- sizeof (AP_STACK_DATA));
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CpuMpData = (CPU_MP_DATA *)ApStackData->MpData;
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}
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return CpuMpData;
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}
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/**
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Save the pointer to CPU MP Data structure.
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@param[in] CpuMpData The pointer to CPU MP Data structure will be saved.
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**/
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VOID
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SaveCpuMpData (
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IN CPU_MP_DATA *CpuMpData
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)
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{
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UINT64 Data64;
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UINTN Index;
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CPU_INFO_IN_HOB *CpuInfoInHob;
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MP_HAND_OFF *MpHandOff;
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UINTN MpHandOffSize;
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//
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// When APs are in a state that can be waken up by a store operation to a memory address,
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// report the MP_HAND_OFF data for DXE to use.
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//
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CpuInfoInHob = (CPU_INFO_IN_HOB *)(UINTN)CpuMpData->CpuInfoInHob;
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MpHandOffSize = sizeof (MP_HAND_OFF) + sizeof (PROCESSOR_HAND_OFF) * CpuMpData->CpuCount;
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MpHandOff = (MP_HAND_OFF *)BuildGuidHob (&mMpHandOffGuid, MpHandOffSize);
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ASSERT (MpHandOff != NULL);
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ZeroMem (MpHandOff, MpHandOffSize);
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MpHandOff->ProcessorIndex = 0;
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MpHandOff->CpuCount = CpuMpData->CpuCount;
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if (CpuMpData->ApLoopMode != ApInHltLoop) {
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MpHandOff->StartupSignalValue = MP_HAND_OFF_SIGNAL;
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MpHandOff->WaitLoopExecutionMode = sizeof (VOID *);
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}
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for (Index = 0; Index < MpHandOff->CpuCount; Index++) {
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MpHandOff->Info[Index].ApicId = CpuInfoInHob[Index].ApicId;
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MpHandOff->Info[Index].Health = CpuInfoInHob[Index].Health;
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if (CpuMpData->ApLoopMode != ApInHltLoop) {
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MpHandOff->Info[Index].StartupSignalAddress = (UINT64)(UINTN)CpuMpData->CpuData[Index].StartupApSignal;
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MpHandOff->Info[Index].StartupProcedureAddress = (UINT64)(UINTN)&CpuMpData->CpuData[Index].ApFunction;
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}
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}
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//
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// Build location of CPU MP DATA buffer in HOB
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//
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Data64 = (UINT64)(UINTN)CpuMpData;
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BuildGuidDataHob (
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&mCpuInitMpLibHobGuid,
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(VOID *)&Data64,
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sizeof (UINT64)
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);
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}
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/**
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Check if AP wakeup buffer is overlapped with existing allocated buffer.
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@param[in] WakeupBufferStart AP wakeup buffer start address.
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@param[in] WakeupBufferEnd AP wakeup buffer end address.
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@retval TRUE There is overlap.
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@retval FALSE There is no overlap.
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**/
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BOOLEAN
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CheckOverlapWithAllocatedBuffer (
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IN UINT64 WakeupBufferStart,
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IN UINT64 WakeupBufferEnd
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)
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{
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EFI_PEI_HOB_POINTERS Hob;
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EFI_HOB_MEMORY_ALLOCATION *MemoryHob;
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BOOLEAN Overlapped;
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UINT64 MemoryStart;
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UINT64 MemoryEnd;
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Overlapped = FALSE;
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//
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// Get the HOB list for processing
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//
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Hob.Raw = GetHobList ();
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//
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// Collect memory ranges
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//
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while (!END_OF_HOB_LIST (Hob)) {
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if (Hob.Header->HobType == EFI_HOB_TYPE_MEMORY_ALLOCATION) {
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MemoryHob = Hob.MemoryAllocation;
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MemoryStart = MemoryHob->AllocDescriptor.MemoryBaseAddress;
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MemoryEnd = MemoryHob->AllocDescriptor.MemoryBaseAddress + MemoryHob->AllocDescriptor.MemoryLength;
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if (!((WakeupBufferStart >= MemoryEnd) || (WakeupBufferEnd <= MemoryStart))) {
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Overlapped = TRUE;
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break;
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}
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}
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Hob.Raw = GET_NEXT_HOB (Hob);
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}
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return Overlapped;
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}
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/**
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Get available system memory below 1MB by specified size.
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@param[in] WakeupBufferSize Wakeup buffer size required
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@retval other Return wakeup buffer address below 1MB.
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@retval -1 Cannot find free memory below 1MB.
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**/
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UINTN
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GetWakeupBuffer (
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IN UINTN WakeupBufferSize
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)
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{
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EFI_PEI_HOB_POINTERS Hob;
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UINT64 WakeupBufferStart;
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UINT64 WakeupBufferEnd;
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WakeupBufferSize = (WakeupBufferSize + SIZE_4KB - 1) & ~(SIZE_4KB - 1);
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//
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// Get the HOB list for processing
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//
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Hob.Raw = GetHobList ();
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//
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// Collect memory ranges
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//
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while (!END_OF_HOB_LIST (Hob)) {
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if (Hob.Header->HobType == EFI_HOB_TYPE_RESOURCE_DESCRIPTOR) {
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if ((Hob.ResourceDescriptor->PhysicalStart < BASE_1MB) &&
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(Hob.ResourceDescriptor->ResourceType == EFI_RESOURCE_SYSTEM_MEMORY) &&
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((Hob.ResourceDescriptor->ResourceAttribute &
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(EFI_RESOURCE_ATTRIBUTE_READ_PROTECTED |
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EFI_RESOURCE_ATTRIBUTE_WRITE_PROTECTED |
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EFI_RESOURCE_ATTRIBUTE_EXECUTION_PROTECTED
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)) == 0)
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)
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{
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//
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// Need memory under 1MB to be collected here
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//
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WakeupBufferEnd = Hob.ResourceDescriptor->PhysicalStart + Hob.ResourceDescriptor->ResourceLength;
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if (ConfidentialComputingGuestHas (CCAttrAmdSevEs) &&
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(WakeupBufferEnd > mSevEsPeiWakeupBuffer))
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{
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//
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// SEV-ES Wakeup buffer should be under 1MB and under any previous one
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//
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WakeupBufferEnd = mSevEsPeiWakeupBuffer;
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} else if (WakeupBufferEnd > BASE_1MB) {
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//
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// Wakeup buffer should be under 1MB
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//
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WakeupBufferEnd = BASE_1MB;
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}
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while (WakeupBufferEnd > WakeupBufferSize) {
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//
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// Wakeup buffer should be aligned on 4KB
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//
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WakeupBufferStart = (WakeupBufferEnd - WakeupBufferSize) & ~(SIZE_4KB - 1);
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if (WakeupBufferStart < Hob.ResourceDescriptor->PhysicalStart) {
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break;
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}
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if (CheckOverlapWithAllocatedBuffer (WakeupBufferStart, WakeupBufferEnd)) {
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//
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// If this range is overlapped with existing allocated buffer, skip it
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// and find the next range
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//
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WakeupBufferEnd -= WakeupBufferSize;
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continue;
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}
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DEBUG ((
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DEBUG_INFO,
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"WakeupBufferStart = %x, WakeupBufferSize = %x\n",
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WakeupBufferStart,
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WakeupBufferSize
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));
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if (ConfidentialComputingGuestHas (CCAttrAmdSevEs)) {
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//
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// Next SEV-ES wakeup buffer allocation must be below this
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// allocation
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//
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mSevEsPeiWakeupBuffer = WakeupBufferStart;
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}
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return (UINTN)WakeupBufferStart;
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}
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}
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}
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//
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// Find the next HOB
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//
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Hob.Raw = GET_NEXT_HOB (Hob);
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}
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return (UINTN)-1;
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}
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/**
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Get available EfiBootServicesCode memory below 4GB by specified size.
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This buffer is required to safely transfer AP from real address mode to
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protected mode or long mode, due to the fact that the buffer returned by
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GetWakeupBuffer() may be marked as non-executable.
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@param[in] BufferSize Wakeup transition buffer size.
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@retval other Return wakeup transition buffer address below 4GB.
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@retval 0 Cannot find free memory below 4GB.
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**/
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UINTN
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AllocateCodeBuffer (
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IN UINTN BufferSize
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)
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{
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EFI_STATUS Status;
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EFI_PHYSICAL_ADDRESS Address;
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Status = PeiServicesAllocatePages (EfiBootServicesCode, EFI_SIZE_TO_PAGES (BufferSize), &Address);
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if (EFI_ERROR (Status)) {
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Address = 0;
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}
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return (UINTN)Address;
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}
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/**
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Return the address of the SEV-ES AP jump table.
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This buffer is required in order for an SEV-ES guest to transition from
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UEFI into an OS.
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@return Return SEV-ES AP jump table buffer
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**/
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UINTN
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GetSevEsAPMemory (
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VOID
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)
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{
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//
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// PEI phase doesn't need to do such transition. So simply return 0.
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//
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return 0;
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}
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/**
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Checks APs status and updates APs status if needed.
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**/
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VOID
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CheckAndUpdateApsStatus (
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VOID
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)
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{
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}
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/**
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Build the microcode patch HOB that contains the base address and size of the
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microcode patch stored in the memory.
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@param[in] CpuMpData Pointer to the CPU_MP_DATA structure.
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**/
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VOID
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BuildMicrocodeCacheHob (
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IN CPU_MP_DATA *CpuMpData
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)
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{
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EDKII_MICROCODE_PATCH_HOB *MicrocodeHob;
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UINTN HobDataLength;
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UINT32 Index;
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HobDataLength = sizeof (EDKII_MICROCODE_PATCH_HOB) +
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sizeof (UINT64) * CpuMpData->CpuCount;
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MicrocodeHob = AllocatePool (HobDataLength);
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if (MicrocodeHob == NULL) {
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ASSERT (FALSE);
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return;
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}
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//
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// Store the information of the memory region that holds the microcode patches.
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//
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MicrocodeHob->MicrocodePatchAddress = CpuMpData->MicrocodePatchAddress;
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MicrocodeHob->MicrocodePatchRegionSize = CpuMpData->MicrocodePatchRegionSize;
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//
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// Store the detected microcode patch for each processor as well.
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//
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MicrocodeHob->ProcessorCount = CpuMpData->CpuCount;
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for (Index = 0; Index < CpuMpData->CpuCount; Index++) {
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if (CpuMpData->CpuData[Index].MicrocodeEntryAddr != 0) {
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MicrocodeHob->ProcessorSpecificPatchOffset[Index] =
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CpuMpData->CpuData[Index].MicrocodeEntryAddr - CpuMpData->MicrocodePatchAddress;
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} else {
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MicrocodeHob->ProcessorSpecificPatchOffset[Index] = MAX_UINT64;
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}
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}
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BuildGuidDataHob (
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&gEdkiiMicrocodePatchHobGuid,
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MicrocodeHob,
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HobDataLength
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);
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return;
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}
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/**
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Initialize global data for MP support.
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@param[in] CpuMpData The pointer to CPU MP Data structure.
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**/
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VOID
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InitMpGlobalData (
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IN CPU_MP_DATA *CpuMpData
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)
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{
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EFI_STATUS Status;
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BuildMicrocodeCacheHob (CpuMpData);
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SaveCpuMpData (CpuMpData);
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///
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/// Install Notify
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///
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Status = PeiServicesNotifyPpi (&mS3SmmInitDoneNotifyDesc);
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ASSERT_EFI_ERROR (Status);
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}
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/**
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This service executes a caller provided function on all enabled APs.
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@param[in] Procedure A pointer to the function to be run on
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enabled APs of the system. See type
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EFI_AP_PROCEDURE.
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@param[in] SingleThread If TRUE, then all the enabled APs execute
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the function specified by Procedure one by
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one, in ascending order of processor handle
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number. If FALSE, then all the enabled APs
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execute the function specified by Procedure
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simultaneously.
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@param[in] WaitEvent The event created by the caller with CreateEvent()
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service. If it is NULL, then execute in
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blocking mode. BSP waits until all APs finish
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or TimeoutInMicroSeconds expires. If it's
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not NULL, then execute in non-blocking mode.
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BSP requests the function specified by
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Procedure to be started on all the enabled
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APs, and go on executing immediately. If
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all return from Procedure, or TimeoutInMicroSeconds
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expires, this event is signaled. The BSP
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can use the CheckEvent() or WaitForEvent()
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services to check the state of event. Type
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EFI_EVENT is defined in CreateEvent() in
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the Unified Extensible Firmware Interface
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Specification.
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@param[in] TimeoutInMicroseconds Indicates the time limit in microseconds for
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APs to return from Procedure, either for
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blocking or non-blocking mode. Zero means
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infinity. If the timeout expires before
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all APs return from Procedure, then Procedure
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on the failed APs is terminated. All enabled
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APs are available for next function assigned
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by MpInitLibStartupAllAPs() or
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MPInitLibStartupThisAP().
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If the timeout expires in blocking mode,
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BSP returns EFI_TIMEOUT. If the timeout
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expires in non-blocking mode, WaitEvent
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is signaled with SignalEvent().
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@param[in] ProcedureArgument The parameter passed into Procedure for
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all APs.
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@param[out] FailedCpuList If NULL, this parameter is ignored. Otherwise,
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if all APs finish successfully, then its
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content is set to NULL. If not all APs
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finish before timeout expires, then its
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content is set to address of the buffer
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holding handle numbers of the failed APs.
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The buffer is allocated by MP Initialization
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library, and it's the caller's responsibility to
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free the buffer with FreePool() service.
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In blocking mode, it is ready for consumption
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when the call returns. In non-blocking mode,
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it is ready when WaitEvent is signaled. The
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list of failed CPU is terminated by
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END_OF_CPU_LIST.
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@retval EFI_SUCCESS In blocking mode, all APs have finished before
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the timeout expired.
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@retval EFI_SUCCESS In non-blocking mode, function has been dispatched
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to all enabled APs.
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@retval EFI_UNSUPPORTED A non-blocking mode request was made after the
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UEFI event EFI_EVENT_GROUP_READY_TO_BOOT was
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signaled.
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@retval EFI_UNSUPPORTED WaitEvent is not NULL if non-blocking mode is not
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supported.
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@retval EFI_DEVICE_ERROR Caller processor is AP.
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@retval EFI_NOT_STARTED No enabled APs exist in the system.
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@retval EFI_NOT_READY Any enabled APs are busy.
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@retval EFI_NOT_READY MP Initialize Library is not initialized.
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@retval EFI_TIMEOUT In blocking mode, the timeout expired before
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all enabled APs have finished.
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@retval EFI_INVALID_PARAMETER Procedure is NULL.
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**/
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EFI_STATUS
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EFIAPI
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MpInitLibStartupAllAPs (
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IN EFI_AP_PROCEDURE Procedure,
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IN BOOLEAN SingleThread,
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IN EFI_EVENT WaitEvent OPTIONAL,
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IN UINTN TimeoutInMicroseconds,
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IN VOID *ProcedureArgument OPTIONAL,
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OUT UINTN **FailedCpuList OPTIONAL
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)
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{
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if (WaitEvent != NULL) {
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return EFI_UNSUPPORTED;
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}
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return StartupAllCPUsWorker (
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Procedure,
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SingleThread,
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TRUE,
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NULL,
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TimeoutInMicroseconds,
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ProcedureArgument,
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FailedCpuList
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);
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}
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/**
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This service lets the caller get one enabled AP to execute a caller-provided
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function.
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@param[in] Procedure A pointer to the function to be run on the
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designated AP of the system. See type
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EFI_AP_PROCEDURE.
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@param[in] ProcessorNumber The handle number of the AP. The range is
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from 0 to the total number of logical
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processors minus 1. The total number of
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logical processors can be retrieved by
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MpInitLibGetNumberOfProcessors().
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@param[in] WaitEvent The event created by the caller with CreateEvent()
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service. If it is NULL, then execute in
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blocking mode. BSP waits until this AP finish
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or TimeoutInMicroSeconds expires. If it's
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not NULL, then execute in non-blocking mode.
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BSP requests the function specified by
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Procedure to be started on this AP,
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and go on executing immediately. If this AP
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return from Procedure or TimeoutInMicroSeconds
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expires, this event is signaled. The BSP
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can use the CheckEvent() or WaitForEvent()
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services to check the state of event. Type
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EFI_EVENT is defined in CreateEvent() in
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the Unified Extensible Firmware Interface
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Specification.
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@param[in] TimeoutInMicroseconds Indicates the time limit in microseconds for
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this AP to finish this Procedure, either for
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blocking or non-blocking mode. Zero means
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infinity. If the timeout expires before
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this AP returns from Procedure, then Procedure
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on the AP is terminated. The
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AP is available for next function assigned
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by MpInitLibStartupAllAPs() or
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MpInitLibStartupThisAP().
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If the timeout expires in blocking mode,
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BSP returns EFI_TIMEOUT. If the timeout
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expires in non-blocking mode, WaitEvent
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is signaled with SignalEvent().
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@param[in] ProcedureArgument The parameter passed into Procedure on the
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specified AP.
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@param[out] Finished If NULL, this parameter is ignored. In
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blocking mode, this parameter is ignored.
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In non-blocking mode, if AP returns from
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Procedure before the timeout expires, its
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content is set to TRUE. Otherwise, the
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value is set to FALSE. The caller can
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determine if the AP returned from Procedure
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by evaluating this value.
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@retval EFI_SUCCESS In blocking mode, specified AP finished before
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the timeout expires.
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@retval EFI_SUCCESS In non-blocking mode, the function has been
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dispatched to specified AP.
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@retval EFI_UNSUPPORTED A non-blocking mode request was made after the
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UEFI event EFI_EVENT_GROUP_READY_TO_BOOT was
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signaled.
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@retval EFI_UNSUPPORTED WaitEvent is not NULL if non-blocking mode is not
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supported.
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@retval EFI_DEVICE_ERROR The calling processor is an AP.
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@retval EFI_TIMEOUT In blocking mode, the timeout expired before
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the specified AP has finished.
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@retval EFI_NOT_READY The specified AP is busy.
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@retval EFI_NOT_READY MP Initialize Library is not initialized.
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@retval EFI_NOT_FOUND The processor with the handle specified by
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ProcessorNumber does not exist.
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@retval EFI_INVALID_PARAMETER ProcessorNumber specifies the BSP or disabled AP.
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@retval EFI_INVALID_PARAMETER Procedure is NULL.
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**/
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EFI_STATUS
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EFIAPI
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MpInitLibStartupThisAP (
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IN EFI_AP_PROCEDURE Procedure,
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IN UINTN ProcessorNumber,
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IN EFI_EVENT WaitEvent OPTIONAL,
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IN UINTN TimeoutInMicroseconds,
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IN VOID *ProcedureArgument OPTIONAL,
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OUT BOOLEAN *Finished OPTIONAL
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)
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{
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if (WaitEvent != NULL) {
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return EFI_UNSUPPORTED;
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}
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return StartupThisAPWorker (
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Procedure,
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ProcessorNumber,
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NULL,
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TimeoutInMicroseconds,
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ProcedureArgument,
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Finished
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);
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}
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/**
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This service switches the requested AP to be the BSP from that point onward.
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This service changes the BSP for all purposes. This call can only be performed
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by the current BSP.
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@param[in] ProcessorNumber The handle number of AP that is to become the new
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BSP. The range is from 0 to the total number of
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logical processors minus 1. The total number of
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logical processors can be retrieved by
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MpInitLibGetNumberOfProcessors().
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@param[in] EnableOldBSP If TRUE, then the old BSP will be listed as an
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enabled AP. Otherwise, it will be disabled.
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@retval EFI_SUCCESS BSP successfully switched.
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@retval EFI_UNSUPPORTED Switching the BSP cannot be completed prior to
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this service returning.
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@retval EFI_UNSUPPORTED Switching the BSP is not supported.
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@retval EFI_DEVICE_ERROR The calling processor is an AP.
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@retval EFI_NOT_FOUND The processor with the handle specified by
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ProcessorNumber does not exist.
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@retval EFI_INVALID_PARAMETER ProcessorNumber specifies the current BSP or
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a disabled AP.
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@retval EFI_NOT_READY The specified AP is busy.
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@retval EFI_NOT_READY MP Initialize Library is not initialized.
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**/
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EFI_STATUS
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EFIAPI
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MpInitLibSwitchBSP (
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IN UINTN ProcessorNumber,
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IN BOOLEAN EnableOldBSP
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)
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{
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return SwitchBSPWorker (ProcessorNumber, EnableOldBSP);
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}
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/**
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This service lets the caller enable or disable an AP from this point onward.
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This service may only be called from the BSP.
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@param[in] ProcessorNumber The handle number of AP.
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The range is from 0 to the total number of
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logical processors minus 1. The total number of
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logical processors can be retrieved by
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MpInitLibGetNumberOfProcessors().
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@param[in] EnableAP Specifies the new state for the processor for
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enabled, FALSE for disabled.
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@param[in] HealthFlag If not NULL, a pointer to a value that specifies
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the new health status of the AP. This flag
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corresponds to StatusFlag defined in
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EFI_MP_SERVICES_PROTOCOL.GetProcessorInfo(). Only
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the PROCESSOR_HEALTH_STATUS_BIT is used. All other
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bits are ignored. If it is NULL, this parameter
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is ignored.
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@retval EFI_SUCCESS The specified AP was enabled or disabled successfully.
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@retval EFI_UNSUPPORTED Enabling or disabling an AP cannot be completed
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prior to this service returning.
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@retval EFI_UNSUPPORTED Enabling or disabling an AP is not supported.
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@retval EFI_DEVICE_ERROR The calling processor is an AP.
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@retval EFI_NOT_FOUND Processor with the handle specified by ProcessorNumber
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does not exist.
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@retval EFI_INVALID_PARAMETER ProcessorNumber specifies the BSP.
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@retval EFI_NOT_READY MP Initialize Library is not initialized.
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**/
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EFI_STATUS
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EFIAPI
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MpInitLibEnableDisableAP (
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IN UINTN ProcessorNumber,
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IN BOOLEAN EnableAP,
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IN UINT32 *HealthFlag OPTIONAL
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)
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{
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return EnableDisableApWorker (ProcessorNumber, EnableAP, HealthFlag);
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}
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/**
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This funtion will try to invoke platform specific microcode shadow logic to
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relocate microcode update patches into memory.
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@param[in, out] CpuMpData The pointer to CPU MP Data structure.
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@retval EFI_SUCCESS Shadow microcode success.
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@retval EFI_OUT_OF_RESOURCES No enough resource to complete the operation.
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@retval EFI_UNSUPPORTED Can't find platform specific microcode shadow
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PPI/Protocol.
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**/
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EFI_STATUS
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PlatformShadowMicrocode (
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IN OUT CPU_MP_DATA *CpuMpData
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)
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{
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EFI_STATUS Status;
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EDKII_PEI_SHADOW_MICROCODE_PPI *ShadowMicrocodePpi;
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UINTN CpuCount;
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EDKII_PEI_MICROCODE_CPU_ID *MicrocodeCpuId;
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UINTN Index;
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UINTN BufferSize;
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VOID *Buffer;
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Status = PeiServicesLocatePpi (
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&gEdkiiPeiShadowMicrocodePpiGuid,
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0,
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NULL,
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(VOID **)&ShadowMicrocodePpi
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);
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if (EFI_ERROR (Status)) {
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return EFI_UNSUPPORTED;
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}
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CpuCount = CpuMpData->CpuCount;
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MicrocodeCpuId = (EDKII_PEI_MICROCODE_CPU_ID *)AllocateZeroPool (sizeof (EDKII_PEI_MICROCODE_CPU_ID) * CpuCount);
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if (MicrocodeCpuId == NULL) {
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return EFI_OUT_OF_RESOURCES;
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}
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for (Index = 0; Index < CpuMpData->CpuCount; Index++) {
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MicrocodeCpuId[Index].ProcessorSignature = CpuMpData->CpuData[Index].ProcessorSignature;
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MicrocodeCpuId[Index].PlatformId = CpuMpData->CpuData[Index].PlatformId;
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}
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Status = ShadowMicrocodePpi->ShadowMicrocode (
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ShadowMicrocodePpi,
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CpuCount,
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MicrocodeCpuId,
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&BufferSize,
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&Buffer
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);
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FreePool (MicrocodeCpuId);
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if (EFI_ERROR (Status)) {
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return EFI_NOT_FOUND;
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}
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CpuMpData->MicrocodePatchAddress = (UINTN)Buffer;
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CpuMpData->MicrocodePatchRegionSize = BufferSize;
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DEBUG ((
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DEBUG_INFO,
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"%a: Required microcode patches have been loaded at 0x%lx, with size 0x%lx.\n",
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__func__,
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CpuMpData->MicrocodePatchAddress,
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CpuMpData->MicrocodePatchRegionSize
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));
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return EFI_SUCCESS;
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}
|