MdeModulePkg/Universal/Acpi/AcpiTableDxe/AcpiTable.c

   1 /** @file
   2   ACPI Table Protocol Driver
   3
   4   Copyright (c) 2006 - 2009, 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
  25 /**
  26   Entry point of the ACPI table driver.
  27   Creates and initializes an instance of the ACPI Table
  28   Protocol and installs it on a new handle.
  29
  30   @param  ImageHandle   A handle for the image that is initializing this driver.
  31   @param  SystemTable   A pointer to the EFI system table.
  32
  33   @return EFI_SUCCESS           Driver initialized successfully.
  34   @return EFI_LOAD_ERROR        Failed to Initialize or has been loaded.
  35   @return EFI_OUT_OF_RESOURCES  Could not allocate needed resources.
  36
  37 **/
  38 EFI_STATUS
  39 EFIAPI
  40 InitializeAcpiTableDxe (
  41   IN EFI_HANDLE           ImageHandle,
  42   IN EFI_SYSTEM_TABLE     *SystemTable
  43   )
  44 {
  45   EFI_STATUS                Status;
  46   EFI_ACPI_TABLE_INSTANCE   *PrivateData;
  47
  48   //
  49   // Initialize our protocol
  50   //
  51   PrivateData = AllocateZeroPool (sizeof (EFI_ACPI_TABLE_INSTANCE));
  52   ASSERT (PrivateData);
  53   PrivateData->Signature = EFI_ACPI_TABLE_SIGNATURE;
  54
  55   //
  56   // Call all constructors per produced protocols
  57   //
  58   Status = AcpiTableAcpiTableConstructor (PrivateData);
  59   if (EFI_ERROR (Status)) {
  60     gBS->FreePool (PrivateData);
  61     return EFI_LOAD_ERROR;
  62   }
  63
  64   //
  65   // Install ACPI Table protocol
  66   //
  67   Status = gBS->InstallMultipleProtocolInterfaces (
  68                   &mHandle,
  69                   &gEfiAcpiTableProtocolGuid,
  70                   &PrivateData->AcpiTableProtocol,
  71                   NULL
  72                   );
  73   ASSERT_EFI_ERROR (Status);
  74
  75   return Status;
  76 }
  77