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   This program and the accompanying materials
   6   are licensed and made available under the terms and conditions of the BSD License
   7   which accompanies this distribution.  The full text of the license may be found at
   8   http://opensource.org/licenses/bsd-license.php
   9
  10   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  11   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  12
  13 **/
  14
  15 //
  16 // Includes
  17 //
  18 #include "AcpiTable.h"
  19
  20 //
  21 // Handle to install ACPI Table Protocol
  22 //
  23 EFI_HANDLE    mHandle = NULL;
  24 GLOBAL_REMOVE_IF_UNREFERENCED EFI_ACPI_TABLE_INSTANCE   *mPrivateData = NULL;
  25
  26 /**
  27   Entry point of the ACPI table driver.
  28   Creates and initializes an instance of the ACPI Table
  29   Protocol and installs it on a new handle.
  30
  31   @param  ImageHandle   A handle for the image that is initializing this driver.
  32   @param  SystemTable   A pointer to the EFI system table.
  33
  34   @return EFI_SUCCESS           Driver initialized successfully.
  35   @return EFI_LOAD_ERROR        Failed to Initialize or has been loaded.
  36   @return EFI_OUT_OF_RESOURCES  Could not allocate needed resources.
  37
  38 **/
  39 EFI_STATUS
  40 EFIAPI
  41 InitializeAcpiTableDxe (
  42   IN EFI_HANDLE           ImageHandle,
  43   IN EFI_SYSTEM_TABLE     *SystemTable
  44   )
  45 {
  46   EFI_STATUS                Status;
  47   EFI_ACPI_TABLE_INSTANCE   *PrivateData;
  48
  49   //
  50   // Initialize our protocol
  51   //
  52   PrivateData = AllocateZeroPool (sizeof (EFI_ACPI_TABLE_INSTANCE));
  53   ASSERT (PrivateData);
  54   PrivateData->Signature = EFI_ACPI_TABLE_SIGNATURE;
  55
  56   //
  57   // Call all constructors per produced protocols
  58   //
  59   Status = AcpiTableAcpiTableConstructor (PrivateData);
  60   if (EFI_ERROR (Status)) {
  61     gBS->FreePool (PrivateData);
  62     return EFI_LOAD_ERROR;
  63   }
  64
  65   //
  66   // Install ACPI Table protocol
  67   //
  68   if (FeaturePcdGet (PcdInstallAcpiSdtProtocol)) {
  69     mPrivateData = PrivateData;
  70     Status = gBS->InstallMultipleProtocolInterfaces (
  71                     &mHandle,
  72                     &gEfiAcpiTableProtocolGuid,
  73                     &PrivateData->AcpiTableProtocol,
  74                     &gEfiAcpiSdtProtocolGuid,
  75                     &mPrivateData->AcpiSdtProtocol,
  76                     NULL
  77                     );
  78   } else {
  79     Status = gBS->InstallMultipleProtocolInterfaces (
  80                     &mHandle,
  81                     &gEfiAcpiTableProtocolGuid,
  82                     &PrivateData->AcpiTableProtocol,
  83                     NULL
  84                     );
  85   }
  86   ASSERT_EFI_ERROR (Status);
  87
  88   return Status;
  89 }
  90