MdeModulePkg/Universal/Acpi/AcpiTableDxe/AcpiTable.c

   1 /** @file
   2   ACPI Table Protocol Driver
   3
   4   Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR>
   5   SPDX-License-Identifier: BSD-2-Clause-Patent
   6
   7 **/
   8
   9 //
  10 // Includes
  11 //
  12 #include "AcpiTable.h"
  13
  14 //
  15 // Handle to install ACPI Table Protocol
  16 //
  17 EFI_HANDLE    mHandle = NULL;
  18 GLOBAL_REMOVE_IF_UNREFERENCED EFI_ACPI_TABLE_INSTANCE   *mPrivateData = NULL;
  19
  20 /**
  21   Entry point of the ACPI table driver.
  22   Creates and initializes an instance of the ACPI Table
  23   Protocol and installs it on a new handle.
  24
  25   @param  ImageHandle   A handle for the image that is initializing this driver.
  26   @param  SystemTable   A pointer to the EFI system table.
  27
  28   @return EFI_SUCCESS           Driver initialized successfully.
  29   @return EFI_LOAD_ERROR        Failed to Initialize or has been loaded.
  30   @return EFI_OUT_OF_RESOURCES  Could not allocate needed resources.
  31
  32 **/
  33 EFI_STATUS
  34 EFIAPI
  35 InitializeAcpiTableDxe (
  36   IN EFI_HANDLE           ImageHandle,
  37   IN EFI_SYSTEM_TABLE     *SystemTable
  38   )
  39 {
  40   EFI_STATUS                Status;
  41   EFI_ACPI_TABLE_INSTANCE   *PrivateData;
  42
  43   //
  44   // Initialize our protocol
  45   //
  46   PrivateData = AllocateZeroPool (sizeof (EFI_ACPI_TABLE_INSTANCE));
  47   ASSERT (PrivateData);
  48   PrivateData->Signature = EFI_ACPI_TABLE_SIGNATURE;
  49
  50   //
  51   // Call all constructors per produced protocols
  52   //
  53   Status = AcpiTableAcpiTableConstructor (PrivateData);
  54   if (EFI_ERROR (Status)) {
  55     gBS->FreePool (PrivateData);
  56     return EFI_LOAD_ERROR;
  57   }
  58
  59   //
  60   // Install ACPI Table protocol
  61   //
  62   if (FeaturePcdGet (PcdInstallAcpiSdtProtocol)) {
  63     mPrivateData = PrivateData;
  64     Status = gBS->InstallMultipleProtocolInterfaces (
  65                     &mHandle,
  66                     &gEfiAcpiTableProtocolGuid,
  67                     &PrivateData->AcpiTableProtocol,
  68                     &gEfiAcpiSdtProtocolGuid,
  69                     &mPrivateData->AcpiSdtProtocol,
  70                     NULL
  71                     );
  72   } else {
  73     Status = gBS->InstallMultipleProtocolInterfaces (
  74                     &mHandle,
  75                     &gEfiAcpiTableProtocolGuid,
  76                     &PrivateData->AcpiTableProtocol,
  77                     NULL
  78                     );
  79   }
  80   ASSERT_EFI_ERROR (Status);
  81
  82   return Status;
  83 }
  84