Step to UEFI (252）ReportStatusCodeRouter 和 StatusCodeHandlerPei

Loading PEIM A3610442-E69F-4DF3-82CA-2360C4031A23
Loading PEIM at 0x000008470A0 EntryPoint=0x000008475A0 ReportStatusCodeRouterPei.efi

/**
  Entry point of Status Code PEIM.

  This function is the entry point of this Status Code Router PEIM.
  It produces Report Stataus Code Handler PPI and Status Code PPI.

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

  @retval EFI_SUCESS  The entry point of DXE IPL PEIM executes successfully.

**/
EFI_STATUS
EFIAPI
GenericStatusCodePeiEntry (
  IN       EFI_PEI_FILE_HANDLE  FileHandle,
  IN CONST EFI_PEI_SERVICES     **PeiServices
  )

Install PPI: 0065D394-9951-4144-82A3-0AFC8579C251
Install PPI: 229832D3-7A30-4B36-B827-F40CB7D45436

  ## Include/Ppi/ReportStatusCodeHandler.h
  gEfiPeiRscHandlerPpiGuid           = { 0x65d394, 0x9951, 0x4144, {0x82, 0xa3, 0xa, 0xfc, 0x85, 0x79, 0xc2, 0x51 }}
  ## Include/Ppi/StatusCode.h
  gEfiPeiStatusCodePpiGuid = { 0x229832d3, 0x7a30, 0x4b36, {0xb8, 0x27, 0xf4, 0xc, 0xb7, 0xd4, 0x54, 0x36 } }

Loading PEIM 9D225237-FA01-464C-A949-BAABC02D31D0
Loading PEIM at 0x0000084BFA0 EntryPoint=0x0000084C4A0 StatusCodeHandlerPei.efi

/**
  Entry point of Status Code PEIM.

  This function is the entry point of this Status Code PEIM.
  It initializes supported status code devices according to PCD settings,
  and installs Status Code PPI.

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

  @retval EFI_SUCESS  The entry point of DXE IPL PEIM executes successfully.

**/
EFI_STATUS
EFIAPI
StatusCodeHandlerPeiEntry (
  IN       EFI_PEI_FILE_HANDLE  FileHandle,
  IN CONST EFI_PEI_SERVICES     **PeiServices
  )
{
  EFI_STATUS                  Status;
  EFI_PEI_RSC_HANDLER_PPI     *RscHandlerPpi;

  Status = PeiServicesLocatePpi (
             &gEfiPeiRscHandlerPpiGuid,
             0,
             NULL,
             (VOID **) &RscHandlerPpi
             );
  ASSERT_EFI_ERROR (Status);

  //
  // Dispatch initialization request to sub-statuscode-devices.
  // If enable UseSerial, then initialize serial port.
  // if enable UseMemory, then initialize memory status code worker.
  //
  if (PcdGetBool (PcdStatusCodeUseSerial)) {
    Status = SerialPortInitialize();
    ASSERT_EFI_ERROR (Status);
    Status = RscHandlerPpi->Register (SerialStatusCodeReportWorker);
    ASSERT_EFI_ERROR (Status);
  }
  if (PcdGetBool (PcdStatusCodeUseMemory)) {
    Status = MemoryStatusCodeInitializeWorker ();
    ASSERT_EFI_ERROR (Status);
    Status = RscHandlerPpi->Register (MemoryStatusCodeReportWorker);
    ASSERT_EFI_ERROR (Status);
  }

  return EFI_SUCCESS;
}

  gEfiMdeModulePkgTokenSpaceGuid.PcdStatusCodeUseSerial|FALSE 
  gEfiMdeModulePkgTokenSpaceGuid.PcdStatusCodeUseMemory|TRUE