/**
  Fault Tolerant Write protocol notification event handler.

  Non-Volatile variable write may needs FTW protocol to reclaim when 
  writting variable.

  @param[in] Event    Event whose notification function is being invoked.
  @param[in] Context  Pointer to the notification function's context.
  
**/
VOID
EFIAPI
FtwNotificationEvent (
  IN  EFI_EVENT                           Event,
  IN  VOID                                *Context
  )
{
  EFI_STATUS                              Status;
  EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL      *FvbProtocol;
  EFI_FAULT_TOLERANT_WRITE_PROTOCOL       *FtwProtocol;
  EFI_PHYSICAL_ADDRESS                    NvStorageVariableBase;
  EFI_GCD_MEMORY_SPACE_DESCRIPTOR         GcdDescriptor;
  EFI_PHYSICAL_ADDRESS                    BaseAddress;
  UINT64                                  Length;
  EFI_PHYSICAL_ADDRESS                    VariableStoreBase;
  UINT64                                  VariableStoreLength;

  //
  // Ensure FTW protocol is installed.
  //
  Status = GetFtwProtocol ((VOID**) &FtwProtocol);
  if (EFI_ERROR (Status)) {
    return ;
  }
  
  //
  // Find the proper FVB protocol for variable.
  //
  NvStorageVariableBase = (EFI_PHYSICAL_ADDRESS) PcdGet64 (PcdFlashNvStorageVariableBase64);
  if (NvStorageVariableBase == 0) {
    NvStorageVariableBase = (EFI_PHYSICAL_ADDRESS) PcdGet32 (PcdFlashNvStorageVariableBase);
  }
  Status = GetFvbInfoByAddress (NvStorageVariableBase, NULL, &FvbProtocol);
  if (EFI_ERROR (Status)) {
    return ;
  }
  mVariableModuleGlobal->FvbInstance = FvbProtocol;

  //
  // Mark the variable storage region of the FLASH as RUNTIME.
  //
  VariableStoreBase   = mVariableModuleGlobal->VariableGlobal.NonVolatileVariableBase;
  VariableStoreLength = ((VARIABLE_STORE_HEADER *)(UINTN)VariableStoreBase)->Size;
  BaseAddress = VariableStoreBase & (~EFI_PAGE_MASK);
  Length      = VariableStoreLength + (VariableStoreBase - BaseAddress);
  Length      = (Length + EFI_PAGE_SIZE - 1) & (~EFI_PAGE_MASK);

  Status      = gDS->GetMemorySpaceDescriptor (BaseAddress, &GcdDescriptor);
  if (EFI_ERROR (Status)) {
    DEBUG ((DEBUG_WARN, "Variable driver failed to add EFI_MEMORY_RUNTIME attribute to Flash.\n"));
  } else {
    Status = gDS->SetMemorySpaceAttributes (
                    BaseAddress,
                    Length,
                    GcdDescriptor.Attributes | EFI_MEMORY_RUNTIME
                    );
    if (EFI_ERROR (Status)) {
      DEBUG ((DEBUG_WARN, "Variable driver failed to add EFI_MEMORY_RUNTIME attribute to Flash.\n"));
    }
  }
  
  Status = VariableWriteServiceInitialize ();
  ASSERT_EFI_ERROR (Status);
 
  //
  // Install the Variable Write Architectural protocol.
  //
  Status = gBS->InstallProtocolInterface (
                  &mHandle,
                  &gEfiVariableWriteArchProtocolGuid, 
                  EFI_NATIVE_INTERFACE,
                  NULL
                  );
  ASSERT_EFI_ERROR (Status);
  
  //
  // Close the notify event to avoid install gEfiVariableWriteArchProtocolGuid again.
  //
  gBS->CloseEvent (Event);

}

/**
  Main entry point to DXE Core.

  @param  HobStart               Pointer to the beginning of the HOB List from PEI.

  @return This function should never return.

**/
VOID
EFIAPI
DxeMain (
  IN  VOID *HobStart
  )
{
  EFI_STATUS                    Status;
  EFI_PHYSICAL_ADDRESS          MemoryBaseAddress;
  UINT64                        MemoryLength;
  PE_COFF_LOADER_IMAGE_CONTEXT  ImageContext;
  UINTN                         Index;
  EFI_HOB_GUID_TYPE             *GuidHob;
  EFI_VECTOR_HANDOFF_INFO       *VectorInfoList;
  EFI_VECTOR_HANDOFF_INFO       *VectorInfo;

  //
  // Setup the default exception handlers
  //
  VectorInfoList = NULL;
  GuidHob = GetNextGuidHob (&gEfiVectorHandoffInfoPpiGuid, HobStart);
  if (GuidHob != NULL) {
    VectorInfoList = (EFI_VECTOR_HANDOFF_INFO *) (GET_GUID_HOB_DATA(GuidHob));
  }
  Status = InitializeCpuExceptionHandlers (VectorInfoList);
  ASSERT_EFI_ERROR (Status);
  
  //
  // Initialize Debug Agent to support source level debug in DXE phase
  //
  InitializeDebugAgent (DEBUG_AGENT_INIT_DXE_CORE, HobStart, NULL);

  //
  // Initialize Memory Services
  //
  CoreInitializeMemoryServices (&HobStart, &MemoryBaseAddress, &MemoryLength);

  //
  // Allocate the EFI System Table and EFI Runtime Service Table from EfiRuntimeServicesData
  // Use the templates to initialize the contents of the EFI System Table and EFI Runtime Services Table
  //
  gDxeCoreST = AllocateRuntimeCopyPool (sizeof (EFI_SYSTEM_TABLE), &mEfiSystemTableTemplate);
  ASSERT (gDxeCoreST != NULL);

  gDxeCoreRT = AllocateRuntimeCopyPool (sizeof (EFI_RUNTIME_SERVICES), &mEfiRuntimeServicesTableTemplate);
  ASSERT (gDxeCoreRT != NULL);

  gDxeCoreST->RuntimeServices = gDxeCoreRT;

  //
  // Start the Image Services.
  //
  Status = CoreInitializeImageServices (HobStart);
  ASSERT_EFI_ERROR (Status);

  //
  // Call constructor for all libraries
  //
  ProcessLibraryConstructorList (gDxeCoreImageHandle, gDxeCoreST);
  PERF_END   (NULL,"PEI", NULL, 0) ;
  PERF_START (NULL,"DXE", NULL, 0) ;

  //
  // Report DXE Core image information to the PE/COFF Extra Action Library
  //
  ZeroMem (&ImageContext, sizeof (ImageContext));
  ImageContext.ImageAddress = (EFI_PHYSICAL_ADDRESS)(UINTN)gDxeCoreLoadedImage->ImageBase;
  ImageContext.PdbPointer   = PeCoffLoaderGetPdbPointer ((VOID*) (UINTN) ImageContext.ImageAddress);
  PeCoffLoaderRelocateImageExtraAction (&ImageContext);

  //
  // Initialize the Global Coherency Domain Services
  //
  Status = CoreInitializeGcdServices (&HobStart, MemoryBaseAddress, MemoryLength);
  ASSERT_EFI_ERROR (Status);

  //
  // Install the DXE Services Table into the EFI System Tables's Configuration Table
  //
  Status = CoreInstallConfigurationTable (&gEfiDxeServicesTableGuid, gDxeCoreDS);
  ASSERT_EFI_ERROR (Status);

  //
  // Install the HOB List into the EFI System Tables's Configuration Table
  //
  Status = CoreInstallConfigurationTable (&gEfiHobListGuid, HobStart);
  ASSERT_EFI_ERROR (Status);

  //
  // Install Memory Type Information Table into the EFI System Tables's Configuration Table
  //
  Status = CoreInstallConfigurationTable (&gEfiMemoryTypeInformationGuid, &gMemoryTypeInformation);
  ASSERT_EFI_ERROR (Status);
//.........这里部分代码省略.........

/**
  Entry point of this module.

  @param[in] FileHandle   Handle of the file being invoked.
  @param[in] PeiServices  Describes the list of possible PEI Services.

  @return Status.

**/
EFI_STATUS
EFIAPI
PeimEntryMA (
    IN       EFI_PEI_FILE_HANDLE      FileHandle,
    IN CONST EFI_PEI_SERVICES         **PeiServices
)
{
    EFI_STATUS                        Status;
    EFI_BOOT_MODE                     BootMode;
    TIS_TPM_HANDLE                    TpmHandle;

    if (!CompareGuid (PcdGetPtr(PcdTpmInstanceGuid), &gEfiTpmDeviceInstanceTpm12Guid)) {
        DEBUG ((EFI_D_ERROR, "No TPM12 instance required!\n"));
        return EFI_UNSUPPORTED;
    }

    if (PcdGetBool (PcdHideTpmSupport) && PcdGetBool (PcdHideTpm)) {
        return EFI_UNSUPPORTED;
    }

    //
    // Initialize TPM device
    //
    Status = PeiServicesGetBootMode (&BootMode);
    ASSERT_EFI_ERROR (Status);

    //
    // In S3 path, skip shadow logic. no measurement is required
    //
    if (BootMode != BOOT_ON_S3_RESUME) {
        Status = (**PeiServices).RegisterForShadow(FileHandle);
        if (Status == EFI_ALREADY_STARTED) {
            mImageInMemory = TRUE;
        } else if (Status == EFI_NOT_FOUND) {
            ASSERT_EFI_ERROR (Status);
        }
    }

    if (!mImageInMemory) {
        TpmHandle = (TIS_TPM_HANDLE)(UINTN)TPM_BASE_ADDRESS;
        Status = TisPcRequestUseTpm ((TIS_PC_REGISTERS_PTR)TpmHandle);
        if (EFI_ERROR (Status)) {
            DEBUG ((DEBUG_ERROR, "TPM not detected!\n"));
            return Status;
        }

        if (PcdGet8 (PcdTpmInitializationPolicy) == 1) {
            Status = TpmCommStartup ((EFI_PEI_SERVICES**)PeiServices, TpmHandle, BootMode);
            if (EFI_ERROR (Status) ) {
                return Status;
            }
        }

        //
        // TpmSelfTest is optional on S3 path, skip it to save S3 time
        //
        if (BootMode != BOOT_ON_S3_RESUME) {
            Status = TpmCommContinueSelfTest ((EFI_PEI_SERVICES**)PeiServices, TpmHandle);
            if (EFI_ERROR (Status)) {
                return Status;
            }
        }

        Status = PeiServicesInstallPpi (&mTpmInitializedPpiList);
        ASSERT_EFI_ERROR (Status);
    }

    if (mImageInMemory) {
        Status = PeimEntryMP ((EFI_PEI_SERVICES**)PeiServices);
        if (EFI_ERROR (Status)) {
            return Status;
        }
    }

    return Status;
}

/**
  This notification function is invoked when an instance of the
  EFI_DEVICE_PATH_PROTOCOL is produced.

  @param  Event                 The event that occured
  @param  Context               For EFI compatiblity.  Not used.

**/
VOID
EFIAPI
NotifyDevPath (
  IN  EFI_EVENT Event,
  IN  VOID      *Context
  )
{
  EFI_HANDLE                            Handle;
  EFI_STATUS                            Status;
  UINTN                                 BufferSize;
  EFI_DEVICE_PATH_PROTOCOL             *DevPathNode;
  ATAPI_DEVICE_PATH                    *Atapi;

  //
  // Examine all new handles
  //
  for (;;) {
    //
    // Get the next handle
    //
    BufferSize = sizeof (Handle);
    Status = gBS->LocateHandle (
              ByRegisterNotify,
              NULL,
              mEfiDevPathNotifyReg,
              &BufferSize,
              &Handle
              );

    //
    // If not found, we're done
    //
    if (EFI_NOT_FOUND == Status) {
      break;
    }

    if (EFI_ERROR (Status)) {
      continue;
    }

    //
    // Get the DevicePath protocol on that handle
    //
    Status = gBS->HandleProtocol (Handle, &gEfiDevicePathProtocolGuid, (VOID **)&DevPathNode);
    ASSERT_EFI_ERROR (Status);

    while (!IsDevicePathEnd (DevPathNode)) {
      //
      // Find the handler to dump this device path node
      //
      if (
           (DevicePathType(DevPathNode) == MESSAGING_DEVICE_PATH) &&
           (DevicePathSubType(DevPathNode) == MSG_ATAPI_DP)
         ) {
        Atapi = (ATAPI_DEVICE_PATH*) DevPathNode;
        PciOr16 (
          PCI_LIB_ADDRESS (
            0,
            1,
            1,
            (Atapi->PrimarySecondary == 1) ? 0x42: 0x40
            ),
          BIT15
          );
      }

      //
      // Next device path node
      //
      DevPathNode = NextDevicePathNode (DevPathNode);
    }
  }

  return;
}

/**
  Communicates with a registered handler.

  This function provides a service to send and receive messages from a registered UEFI service.

  @param[in] This                The EFI_PEI_SMM_COMMUNICATION_PPI instance.
  @param[in, out] CommBuffer     A pointer to the buffer to convey into SMRAM.
  @param[in, out] CommSize       The size of the data buffer being passed in.On exit, the size of data
                                 being returned. Zero if the handler does not wish to reply with any data.

  @retval EFI_SUCCESS            The message was successfully posted.
  @retval EFI_INVALID_PARAMETER  The CommBuffer was NULL.
  @retval EFI_NOT_STARTED        The service is NOT started.
**/
EFI_STATUS
EFIAPI
Communicate (
  IN CONST EFI_PEI_SMM_COMMUNICATION_PPI   *This,
  IN OUT VOID                              *CommBuffer,
  IN OUT UINTN                             *CommSize
  )
{
  EFI_STATUS                       Status;
  PEI_SMM_CONTROL_PPI              *SmmControl;
  PEI_SMM_ACCESS_PPI               *SmmAccess;
  UINT8                            SmiCommand;
  UINTN                            Size;
  EFI_SMM_COMMUNICATION_CONTEXT    *SmmCommunicationContext;

  DEBUG ((EFI_D_INFO, "PiSmmCommunicationPei Communicate Enter\n"));

  if (CommBuffer == NULL) {
    return EFI_INVALID_PARAMETER;
  }

  //
  // Get needed resource
  //
  Status = PeiServicesLocatePpi (
             &gPeiSmmControlPpiGuid,
             0,
             NULL,
             (VOID **)&SmmControl
             );
  if (EFI_ERROR (Status)) {
    return EFI_NOT_STARTED;
  }

  Status = PeiServicesLocatePpi (
             &gPeiSmmAccessPpiGuid,
             0,
             NULL,
             (VOID **)&SmmAccess
             );
  if (EFI_ERROR (Status)) {
    return EFI_NOT_STARTED;
  }

  //
  // Check SMRAM locked, it should be done after SMRAM lock.
  //
  if (!SmmAccess->LockState) {
    DEBUG ((EFI_D_INFO, "PiSmmCommunicationPei LockState - %x\n", (UINTN)SmmAccess->LockState));
    return EFI_NOT_STARTED;
  }

  SmmCommunicationContext = GetCommunicationContext ();
  DEBUG ((EFI_D_INFO, "PiSmmCommunicationPei BufferPtrAddress - 0x%016lx, BufferPtr: 0x%016lx\n", SmmCommunicationContext->BufferPtrAddress, *(EFI_PHYSICAL_ADDRESS *)(UINTN)SmmCommunicationContext->BufferPtrAddress));

  //
  // No need to check if BufferPtr is 0, because it is in PEI phase.
  //
  *(EFI_PHYSICAL_ADDRESS *)(UINTN)SmmCommunicationContext->BufferPtrAddress = (EFI_PHYSICAL_ADDRESS)(UINTN)CommBuffer;
  DEBUG ((EFI_D_INFO, "PiSmmCommunicationPei CommBuffer - %x\n", (UINTN)CommBuffer));

  //
  // Send command
  //
  SmiCommand = (UINT8)SmmCommunicationContext->SwSmiNumber;
  Size = sizeof(SmiCommand);
  Status = SmmControl->Trigger (
                         (EFI_PEI_SERVICES **)GetPeiServicesTablePointer (),
                         SmmControl,
                         (INT8 *)&SmiCommand,
                         &Size,
                         FALSE,
                         0
                         );
  ASSERT_EFI_ERROR (Status);

  //
  // Setting BufferPtr to 0 means this transaction is done.
  //
  *(EFI_PHYSICAL_ADDRESS *)(UINTN)SmmCommunicationContext->BufferPtrAddress = 0;

  DEBUG ((EFI_D_INFO, "PiSmmCommunicationPei Communicate Exit\n"));

  return EFI_SUCCESS;
}

EFI_STATUS
EFIAPI
WinNtTimerDriverInitialize (
  IN EFI_HANDLE        ImageHandle,
  IN EFI_SYSTEM_TABLE  *SystemTable
  )
/*++

Routine Description:

  Initialize the Timer Architectural Protocol driver

Arguments:

  ImageHandle - ImageHandle of the loaded driver

  SystemTable - Pointer to the System Table

Returns:

  EFI_SUCCESS           - Timer Architectural Protocol created

  EFI_OUT_OF_RESOURCES  - Not enough resources available to initialize driver.
  
  EFI_DEVICE_ERROR      - A device error occured attempting to initialize the driver.

--*/
{
  EFI_STATUS  Status;
  UINTN       Result;
  EFI_HANDLE  Handle;
  EFI_HANDLE  hSourceProcessHandle;
  EFI_HANDLE  hSourceHandle;
  EFI_HANDLE  hTargetProcessHandle;
  //
  // Make sure the Timer Architectural Protocol is not already installed in the system
  //
  ASSERT_PROTOCOL_ALREADY_INSTALLED (NULL, &gEfiTimerArchProtocolGuid);

  //
  // Get the CPU Architectural Protocol instance
  //
  Status = gBS->LocateProtocol (&gEfiCpuArchProtocolGuid, NULL, (VOID**)&mCpu);
  ASSERT_EFI_ERROR (Status);

  //
  //  Get our handle so the timer tick thread can suspend
  //
  hSourceProcessHandle = gWinNt->GetCurrentProcess ();
  hSourceHandle        = gWinNt->GetCurrentThread ();
  hTargetProcessHandle = gWinNt->GetCurrentProcess ();
  Result = gWinNt->DuplicateHandle (
                    hSourceProcessHandle,
                    hSourceHandle,
                    hTargetProcessHandle,
                    &mNtMainThreadHandle,
                    0,
                    FALSE,
                    DUPLICATE_SAME_ACCESS
                    );
  if (Result == 0) {
    return EFI_DEVICE_ERROR;
  }

  //
  // Initialize Critical Section used to update variables shared between the main
  // thread and the timer interrupt thread.
  //
  gWinNt->InitializeCriticalSection (&mNtCriticalSection);

  //
  // Start the timer thread at the default timer period
  //
  Status = mTimer.SetTimerPeriod (&mTimer, DEFAULT_TIMER_TICK_DURATION);
  if (EFI_ERROR (Status)) {
    gWinNt->DeleteCriticalSection (&mNtCriticalSection);
    return Status;
  }

  //
  // Install the Timer Architectural Protocol onto a new handle
  //
  Handle = NULL;
  Status = gBS->InstallProtocolInterface (
                  &Handle,
                  &gEfiTimerArchProtocolGuid,
                  EFI_NATIVE_INTERFACE,
                  &mTimer
                  );
  if (EFI_ERROR (Status)) {
    //
    // Cancel the timer
    //
    mTimer.SetTimerPeriod (&mTimer, 0);
    gWinNt->DeleteCriticalSection (&mNtCriticalSection);
    return Status;
  }

  return EFI_SUCCESS;
}

/**
  PEI termination callback.

  @param[in]  PeiServices          General purpose services available to every PEIM.
  @param[in]  NotifyDescriptor     Not uesed.
  @param[in]  Ppi                  Not uesed.

  @retval  EFI_SUCCESS             If the interface could be successfully
                                   installed.

**/
EFI_STATUS
EndOfPeiPpiNotifyCallback (
  IN CONST EFI_PEI_SERVICES     **PeiServices,
  IN EFI_PEI_NOTIFY_DESCRIPTOR  *NotifyDescriptor,
  IN VOID                       *Ppi
  )
{
  EFI_STATUS                  Status;
  UINT64                      MemoryTop;
  UINT64                      LowUncableBase;
  EFI_PLATFORM_INFO_HOB       *PlatformInfo;
  UINT32                      HecBaseHigh;
  EFI_BOOT_MODE               BootMode;

  Status = (*PeiServices)->GetBootMode (PeiServices, &BootMode);

  ASSERT_EFI_ERROR (Status);

  //
  // Set the some PCI and chipset range as UC
  // And align to 1M at leaset
  //
  PlatformInfo = PcdGetPtr (PcdPlatformInfo);

  UpdateDefaultSetupValue (PlatformInfo);

  DEBUG ((EFI_D_ERROR, "Memory TOLM: %X\n", PlatformInfo->MemData.MemTolm));
  DEBUG ((EFI_D_ERROR, "PCIE OSBASE: %lX\n", PlatformInfo->PciData.PciExpressBase));
  DEBUG (
    (EFI_D_ERROR,
    "PCIE   BASE: %lX     Size : %X\n",
    PlatformInfo->PciData.PciExpressBase,
    PlatformInfo->PciData.PciExpressSize)
    );
  DEBUG (
    (EFI_D_ERROR,
    "PCI32  BASE: %X     Limit: %X\n",
    PlatformInfo->PciData.PciResourceMem32Base,
    PlatformInfo->PciData.PciResourceMem32Limit)
    );
  DEBUG (
    (EFI_D_ERROR,
    "PCI64  BASE: %lX     Limit: %lX\n",
    PlatformInfo->PciData.PciResourceMem64Base,
    PlatformInfo->PciData.PciResourceMem64Limit)
    );
  DEBUG ((EFI_D_ERROR, "UC    START: %lX     End  : %lX\n", PlatformInfo->MemData.MemMir0, PlatformInfo->MemData.MemMir1));

  LowUncableBase = PlatformInfo->MemData.MemMaxTolm;
  LowUncableBase &= (0x0FFF00000);
  MemoryTop = (0x100000000);

  if (BootMode != BOOT_ON_S3_RESUME) {
    //
    // In BIOS, HECBASE will be always below 4GB
    //
    HecBaseHigh = (UINT32) RShiftU64 (PlatformInfo->PciData.PciExpressBase, 28);
    ASSERT (HecBaseHigh < 16);

    //
    // Programe HECBASE for DXE phase
    //
  }

  return Status;
}

EFI_STATUS
EFIAPI
SpiProtocolInit (
  IN EFI_SPI_PROTOCOL       *This,
  IN SPI_INIT_TABLE         *InitTable
  )
/*++

Routine Description:

  Initialize the host controller to execute SPI command.

Arguments:

  This                    Pointer to the EFI_SPI_PROTOCOL instance.
  InitTable               Initialization data to be programmed into the SPI host controller.

Returns:

  EFI_SUCCESS             Initialization completed.
  EFI_ACCESS_DENIED       The SPI static configuration interface has been locked-down.
  EFI_INVALID_PARAMETER   Bad input parameters.
  EFI_UNSUPPORTED         Can't get Descriptor mode VSCC values
--*/
{
  EFI_STATUS    Status;
  UINT8         Index;
  UINT16        OpcodeType;
  SPI_INSTANCE  *SpiInstance;
  UINTN         PchRootComplexBar;
  UINT8         UnlockCmdOpcodeIndex;
  UINT8         FlashPartId[3];

  SpiInstance       = SPI_INSTANCE_FROM_SPIPROTOCOL (This);
  PchRootComplexBar = SpiInstance->PchRootComplexBar;

  if (InitTable != NULL) {
    //
    // Copy table into SPI driver Private data structure
    //
    CopyMem (
      &SpiInstance->SpiInitTable,
      InitTable,
      sizeof (SPI_INIT_TABLE)
      );
  } else {
    return EFI_INVALID_PARAMETER;
  }
  //
  // Check if the SPI interface has been locked-down.
  //
  if ((MmioRead16 (PchRootComplexBar + R_QNC_RCRB_SPIS) & B_QNC_RCRB_SPIS_SCL) != 0) {
    ASSERT_EFI_ERROR (EFI_ACCESS_DENIED);
    return EFI_ACCESS_DENIED;
  }
  //
  // Clear all the status bits for status regs.
  //
  MmioOr16 (
    (UINTN) (PchRootComplexBar + R_QNC_RCRB_SPIS),
    (UINT16) ((B_QNC_RCRB_SPIS_CDS | B_QNC_RCRB_SPIS_BAS))
    );
  MmioRead16 (PchRootComplexBar + R_QNC_RCRB_SPIS);

  //
  // Set the Prefix Opcode registers.
  //
  MmioWrite16 (
    PchRootComplexBar + R_QNC_RCRB_SPIPREOP,
    (SpiInstance->SpiInitTable.PrefixOpcode[1] << 8) | InitTable->PrefixOpcode[0]
    );
  MmioRead16 (PchRootComplexBar + R_QNC_RCRB_SPIPREOP);

  //
  // Set Opcode Type Configuration registers.
  //
  for (Index = 0, OpcodeType = 0; Index < SPI_NUM_OPCODE; Index++) {
    switch (SpiInstance->SpiInitTable.OpcodeMenu[Index].Type) {
    case EnumSpiOpcodeRead:
      OpcodeType |= (UINT16) (B_QNC_RCRB_SPIOPTYPE_ADD_READ << (Index * 2));
      break;
    case EnumSpiOpcodeWrite:
      OpcodeType |= (UINT16) (B_QNC_RCRB_SPIOPTYPE_ADD_WRITE << (Index * 2));
      break;
    case EnumSpiOpcodeWriteNoAddr:
      OpcodeType |= (UINT16) (B_QNC_RCRB_SPIOPTYPE_NOADD_WRITE << (Index * 2));
      break;
    default:
      OpcodeType |= (UINT16) (B_QNC_RCRB_SPIOPTYPE_NOADD_READ << (Index * 2));
      break;
    }
  }
  MmioWrite16 (PchRootComplexBar + R_QNC_RCRB_SPIOPTYPE, OpcodeType);
  MmioRead16 (PchRootComplexBar + R_QNC_RCRB_SPIOPTYPE);

  //
  // Setup the Opcode Menu registers.
  //
  UnlockCmdOpcodeIndex = SPI_NUM_OPCODE;
  for (Index = 0; Index < SPI_NUM_OPCODE; Index++) {
//.........这里部分代码省略.........

/**
  Dispatch initialization request to sub status code devices based on 
  customized feature flags.
 
**/
VOID
InitializationDispatcherWorker (
  VOID
  )
{
  EFI_PEI_HOB_POINTERS              Hob;
  EFI_STATUS                        Status;
  MEMORY_STATUSCODE_PACKET_HEADER   *PacketHeader;
  MEMORY_STATUSCODE_RECORD          *Record;
  UINTN                             Index;
  UINTN                             MaxRecordNumber;

  //
  // If enable UseSerial, then initialize serial port.
  // if enable UseRuntimeMemory, then initialize runtime memory status code worker.
  //
  if (FeaturePcdGet (PcdStatusCodeUseSerial)) {
    //
    // Call Serial Port Lib API to initialize serial port.
    //
    Status = SerialPortInitialize ();
    ASSERT_EFI_ERROR (Status);
  }
  if (FeaturePcdGet (PcdStatusCodeUseMemory)) {
    Status = RtMemoryStatusCodeInitializeWorker ();
    ASSERT_EFI_ERROR (Status);
  }

  //
  // Replay Status code which saved in GUID'ed HOB to all supported devices. 
  //
  if (FeaturePcdGet (PcdStatusCodeReplayIn)) {
    // 
    // Journal GUID'ed HOBs to find all record entry, if found, 
    // then output record to support replay device.
    //
    Hob.Raw   = GetFirstGuidHob (&gMemoryStatusCodeRecordGuid);
    if (Hob.Raw != NULL) {
      PacketHeader = (MEMORY_STATUSCODE_PACKET_HEADER *) GET_GUID_HOB_DATA (Hob.Guid);
      Record = (MEMORY_STATUSCODE_RECORD *) (PacketHeader + 1);
      MaxRecordNumber = (UINTN) PacketHeader->RecordIndex;
      if (PacketHeader->PacketIndex > 0) {
        //
        // Record has been wrapped around. So, record number has arrived at max number.
        //
        MaxRecordNumber = (UINTN) PacketHeader->MaxRecordsNumber;
      }
      for (Index = 0; Index < MaxRecordNumber; Index++) {
        //
        // Dispatch records to devices based on feature flag.
        //
        if (FeaturePcdGet (PcdStatusCodeUseSerial)) {
          SerialStatusCodeReportWorker (
            Record[Index].CodeType,
            Record[Index].Value,
            Record[Index].Instance,
            NULL,
            NULL
            );
        }
        if (FeaturePcdGet (PcdStatusCodeUseMemory)) {
          RtMemoryStatusCodeReportWorker (
            Record[Index].CodeType,
            Record[Index].Value,
            Record[Index].Instance,
            NULL,
            NULL
            );
        }
      }
    }
  }
}

//.........这里部分代码省略.........
  }
  if (BltOperation == EfiBltBufferToVideo || BltOperation == EfiBltVideoToVideo || BltOperation == EfiBltVideoFill) {
    if (DestinationY + Height > ScreenHeight) {
      return EFI_INVALID_PARAMETER;
    }

    if (DestinationX + Width > ScreenWidth) {
      return EFI_INVALID_PARAMETER;
    }
  }

  //
  // We have to raise to TPL Notify, so we make an atomic write the frame buffer.
  // We would not want a timer based event (Cursor, ...) to come in while we are
  // doing this operation.
  //
  OriginalTPL = gBS->RaiseTPL (TPL_NOTIFY);

  switch (BltOperation) {
  case EfiBltVideoToBltBuffer:
    //
    // Video to BltBuffer: Source is Video, destination is BltBuffer
    //
    for (SrcY = SourceY, DstY = DestinationY; DstY < (Height + DestinationY) && BltBuffer; SrcY++, DstY++) {
      /// @todo assumes that color depth is 32 (*4, EfiPciIoWidthUint32) and format matches EFI_GRAPHICS_OUTPUT_BLT_PIXEL
      Status = Private->PciIo->Mem.Read (
                                    Private->PciIo,
                                    EfiPciIoWidthUint32,
                                    Private->BarIndexFB,
                                    ((SrcY * ScreenWidth) + SourceX) * 4,
                                    Width,
                                    BltBuffer + (DstY * Delta) + DestinationX
                                    );
      ASSERT_EFI_ERROR((Status));
    }
    break;

  case EfiBltBufferToVideo:
    //
    // BltBuffer to Video: Source is BltBuffer, destination is Video
    //
    for (SrcY = SourceY, DstY = DestinationY; SrcY < (Height + SourceY); SrcY++, DstY++) {
      /// @todo assumes that color depth is 32 (*4, EfiPciIoWidthUint32) and format matches EFI_GRAPHICS_OUTPUT_BLT_PIXEL
      Status = Private->PciIo->Mem.Write (
                                    Private->PciIo,
                                    EfiPciIoWidthUint32,
                                    Private->BarIndexFB,
                                    ((DstY * ScreenWidth) + DestinationX) * 4,
                                    Width,
                                    BltBuffer + (SrcY * Delta) + SourceX
                                    );
      ASSERT_EFI_ERROR((Status));
    }
    break;

  case EfiBltVideoToVideo:
    //
    // Video to Video: Source is Video, destination is Video
    //
    if (DestinationY <= SourceY) {
      // forward copy
      for (SrcY = SourceY, DstY = DestinationY; SrcY < (Height + SourceY); SrcY++, DstY++) {
        /// @todo assumes that color depth is 32 (*4, EfiPciIoWidthUint32) and format matches EFI_GRAPHICS_OUTPUT_BLT_PIXEL
        Status = Private->PciIo->CopyMem (
                                    Private->PciIo,
                                    EfiPciIoWidthUint32,

/**
  The module Entry Point of the Firmware Performance Data Table DXE driver.

  @param[in]  ImageHandle    The firmware allocated handle for the EFI image.
  @param[in]  SystemTable    A pointer to the EFI System Table.

  @retval EFI_SUCCESS    The entry point is executed successfully.
  @retval Other          Some error occurs when executing this entry point.

**/
EFI_STATUS
EFIAPI
FirmwarePerformanceDxeEntryPoint (
  IN EFI_HANDLE          ImageHandle,
  IN EFI_SYSTEM_TABLE    *SystemTable
  )
{
  EFI_STATUS               Status;
  EFI_HOB_GUID_TYPE        *GuidHob;
  FIRMWARE_SEC_PERFORMANCE *Performance;

  //
  // Get Report Status Code Handler Protocol.
  //
  Status = gBS->LocateProtocol (&gEfiRscHandlerProtocolGuid, NULL, (VOID **) &mRscHandlerProtocol);
  ASSERT_EFI_ERROR (Status);

  //
  // Register report status code listener for OS Loader load and start.
  //
  Status = mRscHandlerProtocol->Register (FpdtStatusCodeListenerDxe, TPL_HIGH_LEVEL);
  ASSERT_EFI_ERROR (Status);

  //
  // Register the notify function to update FPDT on ExitBootServices Event.
  //
  Status = gBS->CreateEventEx (
                  EVT_NOTIFY_SIGNAL,
                  TPL_NOTIFY,
                  FpdtExitBootServicesEventNotify,
                  NULL,
                  &gEfiEventExitBootServicesGuid,
                  &mExitBootServicesEvent
                  );
  ASSERT_EFI_ERROR (Status);

  //
  // Create ready to boot event to install ACPI FPDT table.
  //
  Status = gBS->CreateEventEx (
                  EVT_NOTIFY_SIGNAL,
                  TPL_NOTIFY,
                  FpdtReadyToBootEventNotify,
                  NULL,
                  &gEfiEventReadyToBootGuid,
                  &mReadyToBootEvent
                  );
  ASSERT_EFI_ERROR (Status);

  //
  // Create legacy boot event to log OsLoaderStartImageStart for legacy boot.
  //
  Status = gBS->CreateEventEx (
                  EVT_NOTIFY_SIGNAL,
                  TPL_NOTIFY,
                  FpdtLegacyBootEventNotify,
                  NULL,
                  &gEfiEventLegacyBootGuid,
                  &mLegacyBootEvent
                  );
  ASSERT_EFI_ERROR (Status);

  //
  // Retrieve GUID HOB data that contains the ResetEnd.
  //
  GuidHob = GetFirstGuidHob (&gEfiFirmwarePerformanceGuid);
  if (GuidHob != NULL) {
    Performance = (FIRMWARE_SEC_PERFORMANCE *) GET_GUID_HOB_DATA (GuidHob);
    mBootPerformanceTableTemplate.BasicBoot.ResetEnd = Performance->ResetEnd;
  } else {
    //
    // SEC Performance Data Hob not found, ResetEnd in ACPI FPDT table will be 0.
    //
    DEBUG ((EFI_D_ERROR, "FPDT: WARNING: SEC Performance Data Hob not found, ResetEnd will be set to 0!\n"));
  }

  return EFI_SUCCESS;
}

/**
  Install ACPI Firmware Performance Data Table (FPDT).

  @return Status code.

**/
EFI_STATUS
InstallFirmwarePerformanceDataTable (
  VOID
  )
{
  EFI_STATUS                    Status;
  EFI_ACPI_TABLE_PROTOCOL       *AcpiTableProtocol;
  EFI_PHYSICAL_ADDRESS          Address;
  UINTN                         Size;
  UINT8                         SmmBootRecordCommBuffer[SMM_BOOT_RECORD_COMM_SIZE];
  EFI_SMM_COMMUNICATE_HEADER    *SmmCommBufferHeader;
  SMM_BOOT_RECORD_COMMUNICATE   *SmmCommData;
  UINTN                         CommSize;
  UINTN                         PerformanceRuntimeDataSize;
  UINT8                         *PerformanceRuntimeData; 
  UINT8                         *PerformanceRuntimeDataHead; 
  EFI_SMM_COMMUNICATION_PROTOCOL  *Communication;
  FIRMWARE_PERFORMANCE_VARIABLE PerformanceVariable;

  //
  // Get AcpiTable Protocol.
  //
  Status = gBS->LocateProtocol (&gEfiAcpiTableProtocolGuid, NULL, (VOID **) &AcpiTableProtocol);
  if (EFI_ERROR (Status)) {
    return Status;
  }

  //
  // Collect boot records from SMM drivers.
  //
  SmmCommData = NULL;
  Status = gBS->LocateProtocol (&gEfiSmmCommunicationProtocolGuid, NULL, (VOID **) &Communication);
  if (!EFI_ERROR (Status)) {
    //
    // Initialize communicate buffer 
    //
    SmmCommBufferHeader = (EFI_SMM_COMMUNICATE_HEADER*)SmmBootRecordCommBuffer;
    SmmCommData = (SMM_BOOT_RECORD_COMMUNICATE*)SmmCommBufferHeader->Data;
    ZeroMem((UINT8*)SmmCommData, sizeof(SMM_BOOT_RECORD_COMMUNICATE));

    CopyGuid (&SmmCommBufferHeader->HeaderGuid, &gEfiFirmwarePerformanceGuid);
    SmmCommBufferHeader->MessageLength = sizeof(SMM_BOOT_RECORD_COMMUNICATE);
    CommSize = SMM_BOOT_RECORD_COMM_SIZE;
  
    //
    // Get the size of boot records.
    //
    SmmCommData->Function       = SMM_FPDT_FUNCTION_GET_BOOT_RECORD_SIZE;
    SmmCommData->BootRecordData = NULL;
    Status = Communication->Communicate (Communication, SmmBootRecordCommBuffer, &CommSize);
    ASSERT_EFI_ERROR (Status);
  
    if (!EFI_ERROR (SmmCommData->ReturnStatus) && SmmCommData->BootRecordSize != 0) {
      //
      // Get all boot records
      //
      SmmCommData->Function       = SMM_FPDT_FUNCTION_GET_BOOT_RECORD_DATA;
      SmmCommData->BootRecordData = AllocateZeroPool(SmmCommData->BootRecordSize);
      ASSERT (SmmCommData->BootRecordData != NULL);
      
      Status = Communication->Communicate (Communication, SmmBootRecordCommBuffer, &CommSize);
      ASSERT_EFI_ERROR (Status);
      ASSERT_EFI_ERROR(SmmCommData->ReturnStatus);
    }
  }

  //
  // Prepare memory for runtime Performance Record. 
  // Runtime performance records includes two tables S3 performance table and Boot performance table. 
  // S3 Performance table includes S3Resume and S3Suspend records. 
  // Boot Performance table includes BasicBoot record, and one or more appended Boot Records. 
  //
  PerformanceRuntimeData = NULL;
  PerformanceRuntimeDataSize = sizeof (S3_PERFORMANCE_TABLE) + sizeof (BOOT_PERFORMANCE_TABLE) + mBootRecordSize + PcdGet32 (PcdExtFpdtBootRecordPadSize);
  if (SmmCommData != NULL) {
    PerformanceRuntimeDataSize += SmmCommData->BootRecordSize;
  }

  //
  // Try to allocate the same runtime buffer as last time boot.
  //
  ZeroMem (&PerformanceVariable, sizeof (PerformanceVariable));
  Size = sizeof (PerformanceVariable);
  Status = gRT->GetVariable (
                  EFI_FIRMWARE_PERFORMANCE_VARIABLE_NAME,
                  &gEfiFirmwarePerformanceGuid,
                  NULL,
                  &Size,
                  &PerformanceVariable
                  );
  if (!EFI_ERROR (Status)) {
    Address = PerformanceVariable.S3PerformanceTablePointer;
    Status = gBS->AllocatePages (
                    AllocateAddress,
//.........这里部分代码省略.........

/**
  Variable Driver main entry point. The Variable driver places the 4 EFI
  runtime services in the EFI System Table and installs arch protocols 
  for variable read and write services being availible. It also registers
  a notification function for an EVT_SIGNAL_VIRTUAL_ADDRESS_CHANGE event.

  @param[in] ImageHandle    The firmware allocated handle for the EFI image.  
  @param[in] SystemTable    A pointer to the EFI System Table.
  
  @retval EFI_SUCCESS       Variable service successfully initialized.

**/
EFI_STATUS
EFIAPI
VariableServiceInitialize (
  IN EFI_HANDLE                         ImageHandle,
  IN EFI_SYSTEM_TABLE                   *SystemTable
  )
{
  EFI_STATUS                            Status;
  EFI_EVENT                             ReadyToBootEvent;    

  Status = VariableCommonInitialize ();
  ASSERT_EFI_ERROR (Status);

  SystemTable->RuntimeServices->GetVariable         = VariableServiceGetVariable;
  SystemTable->RuntimeServices->GetNextVariableName = VariableServiceGetNextVariableName;
  SystemTable->RuntimeServices->SetVariable         = VariableServiceSetVariable;
  SystemTable->RuntimeServices->QueryVariableInfo   = VariableServiceQueryVariableInfo;
    
  //
  // Now install the Variable Runtime Architectural protocol on a new handle.
  //
  Status = gBS->InstallProtocolInterface (
                  &mHandle,
                  &gEfiVariableArchProtocolGuid, 
                  EFI_NATIVE_INTERFACE,
                  NULL
                  );
  ASSERT_EFI_ERROR (Status);

  //
  // Register FtwNotificationEvent () notify function.
  // 
  EfiCreateProtocolNotifyEvent (
    &gEfiFaultTolerantWriteProtocolGuid,
    TPL_CALLBACK,
    FtwNotificationEvent,
    (VOID *)SystemTable,
    &mFtwRegistration
    );

  Status = gBS->CreateEventEx (
                  EVT_NOTIFY_SIGNAL,
                  TPL_NOTIFY,
                  VariableClassAddressChangeEvent,
                  NULL,
                  &gEfiEventVirtualAddressChangeGuid,
                  &mVirtualAddressChangeEvent
                  );
  ASSERT_EFI_ERROR (Status);

  //
  // Register the event handling function to reclaim variable for OS usage.
  //
  Status = EfiCreateEventReadyToBootEx (
             TPL_NOTIFY, 
             OnReadyToBoot, 
             NULL, 
             &ReadyToBootEvent
             );

  return EFI_SUCCESS;
}

/**
  Function to read a single line (up to but not including the \n) from a file.

  If the position upon start is 0, then the Ascii Boolean will be set.  This should be
  maintained and not changed for all operations with the same file.
  The function will not return the \r and \n character in buffer. When an empty line is
  read a CHAR_NULL character will be returned in buffer.

  @param[in]       Handle        FileHandle to read from.
  @param[in, out]  Buffer        The pointer to buffer to read into.
  @param[in, out]  Size          The pointer to number of bytes in Buffer.
  @param[in]       Truncate      If the buffer is large enough, this has no effect.
                                 If the buffer is is too small and Truncate is TRUE,
                                 the line will be truncated.
                                 If the buffer is is too small and Truncate is FALSE,
                                 then no read will occur.

  @param[in, out]  Ascii         Boolean value for indicating whether the file is
                                 Ascii (TRUE) or UCS2 (FALSE).

  @retval EFI_SUCCESS           The operation was successful.  The line is stored in
                                Buffer.
  @retval EFI_INVALID_PARAMETER Handle was NULL.
  @retval EFI_INVALID_PARAMETER Size was NULL.
  @retval EFI_BUFFER_TOO_SMALL  Size was not large enough to store the line.
                                Size was updated to the minimum space required.
  @sa FileHandleRead
**/
EFI_STATUS
EFIAPI
FileHandleReadLine(
  IN EFI_FILE_HANDLE            Handle,
  IN OUT CHAR16                 *Buffer,
  IN OUT UINTN                  *Size,
  IN BOOLEAN                    Truncate,
  IN OUT BOOLEAN                *Ascii
  )
{
  EFI_STATUS  Status;
  CHAR16      CharBuffer;
  UINT64      FileSize;
  UINTN       CharSize;
  UINTN       CountSoFar;
  UINTN       CrCount;
  UINT64      OriginalFilePosition;

  if (Handle == NULL
    ||Size   == NULL
    ||(Buffer==NULL&&*Size!=0)
   ){
    return (EFI_INVALID_PARAMETER);
  } 
  
  if (Buffer != NULL && *Size != 0) {
    *Buffer = CHAR_NULL;
  } 
  
  Status = FileHandleGetSize (Handle, &FileSize);
  if (EFI_ERROR (Status)) {
    return Status;
  } else if (FileSize == 0) {
    *Ascii = TRUE;
    return EFI_SUCCESS;
  }  
  
  FileHandleGetPosition(Handle, &OriginalFilePosition);
  if (OriginalFilePosition == 0) {
    CharSize = sizeof(CHAR16);
    Status = FileHandleRead(Handle, &CharSize, &CharBuffer);
    ASSERT_EFI_ERROR(Status);
    if (CharBuffer == gUnicodeFileTag) {
      *Ascii = FALSE;
    } else {
      *Ascii = TRUE;
      FileHandleSetPosition(Handle, OriginalFilePosition);
    }
  }

  CrCount = 0;
  for (CountSoFar = 0;;CountSoFar++){
    CharBuffer = 0;
    if (*Ascii) {
      CharSize = sizeof(CHAR8);
    } else {
      CharSize = sizeof(CHAR16);
    }
    Status = FileHandleRead(Handle, &CharSize, &CharBuffer);
    if (  EFI_ERROR(Status)
       || CharSize == 0
       || (CharBuffer == L'\n' && !(*Ascii))
       || (CharBuffer ==  '\n' && *Ascii)
     ){
      break;
    } else if (
        (CharBuffer == L'\r' && !(*Ascii)) ||
        (CharBuffer ==  '\r' && *Ascii)
      ) {
      CrCount++;
      continue;
    }
//.........这里部分代码省略.........

/**

  This function attempts to boot for the boot order specified
  by platform policy.

**/
VOID
BdsBootDeviceSelect (
  VOID
  )
{
  EFI_STATUS        Status;
  LIST_ENTRY        *Link;
  BDS_COMMON_OPTION *BootOption;
  UINTN             ExitDataSize;
  CHAR16            *ExitData;
  UINT16            Timeout;
  LIST_ENTRY        BootLists;
  CHAR16            Buffer[20];
  BOOLEAN           BootNextExist;
  LIST_ENTRY        *LinkBootNext;
  EFI_EVENT         ConnectConInEvent;

  //
  // Got the latest boot option
  //
  BootNextExist = FALSE;
  LinkBootNext  = NULL;
  ConnectConInEvent = NULL;
  InitializeListHead (&BootLists);

  //
  // First check the boot next option
  //
  ZeroMem (Buffer, sizeof (Buffer));

  //
  // Create Event to signal ConIn connection request
  //
  if (PcdGetBool (PcdConInConnectOnDemand)) {
    Status = gBS->CreateEventEx (
                    EVT_NOTIFY_SIGNAL,
                    TPL_CALLBACK,
                    BdsEmptyCallbackFunction,
                    NULL,
                    &gConnectConInEventGuid,
                    &ConnectConInEvent
                    );
    if (EFI_ERROR(Status)) {
      ConnectConInEvent = NULL;
    }
  }

  if (mBootNext != NULL) {
    //
    // Indicate we have the boot next variable, so this time
    // boot will always have this boot option
    //
    BootNextExist = TRUE;

    //
    // Clear the this variable so it's only exist in this time boot
    //
    Status = gRT->SetVariable (
          L"BootNext",
          &gEfiGlobalVariableGuid,
          EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_NON_VOLATILE,
          0,
                    NULL
          );
    //
    // Deleting variable with current variable implementation shouldn't fail.
    //
    ASSERT_EFI_ERROR (Status);

    //
    // Add the boot next boot option
    //
    UnicodeSPrint (Buffer, sizeof (Buffer), L"Boot%04x", *mBootNext);
    BootOption = BdsLibVariableToOption (&BootLists, Buffer);

    //
    // If fail to get boot option from variable, just return and do nothing.
    //
    if (BootOption == NULL) {
      return;
    }

    BootOption->BootCurrent = *mBootNext;
  }
  //
  // Parse the boot order to get boot option
  //
  BdsLibBuildOptionFromVar (&BootLists, L"BootOrder");

  //
  // When we didn't have chance to build boot option variables in the first 
  // full configuration boot (e.g.: Reset in the first page or in Device Manager),
  // we have no boot options in the following mini configuration boot.
  // Give the last chance to enumerate the boot options.
//.........这里部分代码省略.........