audk/MdeModulePkg/Universal/Acpi/AcpiTableDxe/AcpiTable.c

/** @file
  ACPI Table Protocol Driver

  Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR>
  This program and the accompanying materials
  are licensed and made available under the terms and conditions of the BSD License
  which accompanies this distribution.  The full text of the license may be found at
  http://opensource.org/licenses/bsd-license.php

  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.

**/

//
// Includes
//
#include "AcpiTable.h"

//
// Handle to install ACPI Table Protocol
//
EFI_HANDLE    mHandle = NULL;
GLOBAL_REMOVE_IF_UNREFERENCED EFI_ACPI_TABLE_INSTANCE   *mPrivateData = NULL;

/**
  Entry point of the ACPI table driver.
  Creates and initializes an instance of the ACPI Table
  Protocol and installs it on a new handle.

  @param  ImageHandle   A handle for the image that is initializing this driver.
  @param  SystemTable   A pointer to the EFI system table.

  @return EFI_SUCCESS           Driver initialized successfully.
  @return EFI_LOAD_ERROR        Failed to Initialize or has been loaded.
  @return EFI_OUT_OF_RESOURCES  Could not allocate needed resources.

**/
EFI_STATUS
EFIAPI
InitializeAcpiTableDxe (
  IN EFI_HANDLE           ImageHandle,
  IN EFI_SYSTEM_TABLE     *SystemTable
  )
{
  EFI_STATUS                Status;
  EFI_ACPI_TABLE_INSTANCE   *PrivateData;

  //
  // Initialize our protocol
  //
  PrivateData = AllocateZeroPool (sizeof (EFI_ACPI_TABLE_INSTANCE));
  ASSERT (PrivateData);
  PrivateData->Signature = EFI_ACPI_TABLE_SIGNATURE;

  //
  // Call all constructors per produced protocols
  //
  Status = AcpiTableAcpiTableConstructor (PrivateData);
  if (EFI_ERROR (Status)) {
    gBS->FreePool (PrivateData);
    return EFI_LOAD_ERROR;
  }

  //
  // Install ACPI Table protocol
  //
  if (FeaturePcdGet (PcdInstallAcpiSdtProtocol)) {
    mPrivateData = PrivateData;
    Status = gBS->InstallMultipleProtocolInterfaces (
                    &mHandle,
                    &gEfiAcpiTableProtocolGuid,
                    &PrivateData->AcpiTableProtocol,
                    &gEfiAcpiSdtProtocolGuid,
                    &mPrivateData->AcpiSdtProtocol,
                    NULL
                    );
  } else {
    Status = gBS->InstallMultipleProtocolInterfaces (
                    &mHandle,
                    &gEfiAcpiTableProtocolGuid,
                    &PrivateData->AcpiTableProtocol,
                    NULL
                    );
  }
  ASSERT_EFI_ERROR (Status);

  return Status;
}