Files
system76-edk2/ArmPkg/Drivers/ArmGic/ArmGicNonSecLib.c
Olivier Martin 41fb5d4634 ArmPkg/ArmGic: Use the GIC Redistributor instead of GIC Distributor for GICv3
GICv3 controller with no GICv2 legacy support must use the GIC
Redistributor registers instead of the GIC Distributor registers
for some operations (eg: enable/disable interrupts).

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Olivier Martin <olivier.martin@arm.com>
Tested-by: Ard Biesheuvel <ard@linaro.org>
Reviewed-by: Ard Biesheuvel <ard@linaro.org>



git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@16874 6f19259b-4bc3-4df7-8a09-765794883524
2015-02-16 10:23:42 +00:00

38 lines
1.1 KiB
C

/** @file
*
* Copyright (c) 2011-2015, ARM Limited. All rights reserved.
*
* 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.
*
**/
#include <Uefi.h>
#include <Library/IoLib.h>
#include <Library/ArmGicLib.h>
VOID
EFIAPI
ArmGicEnableDistributor (
IN INTN GicDistributorBase
)
{
ARM_GIC_ARCH_REVISION Revision;
/*
* Enable GIC distributor in Non-Secure world.
* Note: The ICDDCR register is banked when Security extensions are implemented
*/
Revision = ArmGicGetSupportedArchRevision ();
if (Revision == ARM_GIC_ARCH_REVISION_2) {
MmioWrite32 (GicDistributorBase + ARM_GIC_ICDDCR, 0x1);
} else {
MmioWrite32 (GicDistributorBase + ARM_GIC_ICDDCR, 0x2);
}
}