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)21ArmGicEnableDistributor ( 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