1 /** @file
2 *
3 *  Copyright (c) 2011-2015, ARM Limited. All rights reserved.
4 *
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 #include <Uefi.h>
16 #include <Library/IoLib.h>
17 #include <Library/ArmGicLib.h>
18 
19 VOID
20 EFIAPI
ArmGicEnableDistributor(IN INTN GicDistributorBase)21 ArmGicEnableDistributor (
22   IN  INTN          GicDistributorBase
23   )
24 {
25   ARM_GIC_ARCH_REVISION Revision;
26 
27   /*
28    * Enable GIC distributor in Non-Secure world.
29    * Note: The ICDDCR register is banked when Security extensions are implemented
30    */
31   Revision = ArmGicGetSupportedArchRevision ();
32   if (Revision == ARM_GIC_ARCH_REVISION_2) {
33     MmioWrite32 (GicDistributorBase + ARM_GIC_ICDDCR, 0x1);
34   } else {
35     if (MmioRead32 (GicDistributorBase + ARM_GIC_ICDDCR) & ARM_GIC_ICDDCR_ARE) {
36       MmioOr32 (GicDistributorBase + ARM_GIC_ICDDCR, 0x2);
37     } else {
38       MmioOr32 (GicDistributorBase + ARM_GIC_ICDDCR, 0x1);
39     }
40   }
41 }
42