IntelFrameworkModulePkg/Universal/StatusCode/DatahubStatusCodeHandlerDxe/DatahubStatusCodeHandlerDxe.c

   1 /** @file
   2   Status Code Handler Driver which produces datahub handler and hook it
   3   onto the DXE status code router.
   4
   5   Copyright (c) 2010 - 2019, Intel Corporation. All rights reserved.<BR>
   6   SPDX-License-Identifier: BSD-2-Clause-Patent
   7
   8 **/
   9
  10 #include "DatahubStatusCodeHandlerDxe.h"
  11
  12 static EFI_EVENT          mExitBootServicesEvent     = NULL;
  13 EFI_RSC_HANDLER_PROTOCOL  *mRscHandlerProtocol       = NULL;
  14
  15 /**
  16   Unregister status code callback functions only available at boot time from
  17   report status code router when exiting boot services.
  18
  19   @param  Event         Event whose notification function is being invoked.
  20   @param  Context       Pointer to the notification function's context, which is
  21                         always zero in current implementation.
  22
  23 **/
  24 VOID
  25 EFIAPI
  26 UnregisterBootTimeHandlers (
  27   IN EFI_EVENT        Event,
  28   IN VOID             *Context
  29   )
  30 {
  31   mRscHandlerProtocol->Unregister (DataHubStatusCodeReportWorker);
  32 }
  33
  34 /**
  35   Entry point of DXE Status Code Driver.
  36
  37   This function is the entry point of this DXE Status Code Driver.
  38   It initializes registers status code handlers, and registers event for EVT_SIGNAL_VIRTUAL_ADDRESS_CHANGE.
  39
  40   @param  ImageHandle       The firmware allocated handle for the EFI image.
  41   @param  SystemTable       A pointer to the EFI System Table.
  42
  43   @retval EFI_SUCCESS       The entry point is executed successfully.
  44
  45 **/
  46 EFI_STATUS
  47 EFIAPI
  48 DatahubStatusCodeHandlerDxeEntry (
  49   IN EFI_HANDLE         ImageHandle,
  50   IN EFI_SYSTEM_TABLE   *SystemTable
  51   )
  52 {
  53   EFI_STATUS  Status;
  54
  55   if (FeaturePcdGet (PcdStatusCodeUseDataHub)) {
  56     Status = gBS->LocateProtocol (
  57                     &gEfiRscHandlerProtocolGuid,
  58                     NULL,
  59                     (VOID **) &mRscHandlerProtocol
  60                     );
  61     ASSERT_EFI_ERROR (Status);
  62
  63     //
  64     // Dispatch initialization request to supported devices
  65     //
  66     DataHubStatusCodeInitializeWorker ();
  67
  68     mRscHandlerProtocol->Register (DataHubStatusCodeReportWorker, TPL_HIGH_LEVEL);
  69
  70     Status = gBS->CreateEventEx (
  71                     EVT_NOTIFY_SIGNAL,
  72                     TPL_NOTIFY,
  73                     UnregisterBootTimeHandlers,
  74                     NULL,
  75                     &gEfiEventExitBootServicesGuid,
  76                     &mExitBootServicesEvent
  77                     );
  78     ASSERT_EFI_ERROR (Status);
  79   }
  80
  81   return EFI_SUCCESS;
  82 }