uefi/linaro-edk2/ArmPkg/Drivers/ArmGic/ArmGicDxe.c

/*++

Copyright (c) 2013-2014, ARM Ltd. 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.

Module Name:

  ArmGicDxe.c

Abstract:

  Driver implementing the GIC interrupt controller protocol

--*/

#include <PiDxe.h>

#include "ArmGicDxe.h"

/**
  Initialize the state information for the CPU Architectural Protocol

  @param  ImageHandle   of the loaded driver
  @param  SystemTable   Pointer to the System Table

  @retval EFI_SUCCESS           Protocol registered
  @retval EFI_OUT_OF_RESOURCES  Cannot allocate protocol data structure
  @retval EFI_DEVICE_ERROR      Hardware problems
  @retval EFI_UNSUPPORTED       GIC version not supported

**/
EFI_STATUS
InterruptDxeInitialize (
  IN EFI_HANDLE         ImageHandle,
  IN EFI_SYSTEM_TABLE   *SystemTable
  )
{
  EFI_STATUS            Status;
  ARM_GIC_ARCH_REVISION Revision;

  Revision = ArmGicGetSupportedArchRevision ();

  if (Revision == ARM_GIC_ARCH_REVISION_2) {
    Status = GicV2DxeInitialize (ImageHandle, SystemTable);
  } else if (Revision == ARM_GIC_ARCH_REVISION_3) {
    Status = GicV3DxeInitialize (ImageHandle, SystemTable);
  } else {
    Status = EFI_UNSUPPORTED;
  }

  return Status;
}