diff options
Diffstat (limited to 'ArmPkg/Library/ArmGicArchSecLib/Arm/ArmGicArchLib.c')
-rw-r--r-- | ArmPkg/Library/ArmGicArchSecLib/Arm/ArmGicArchLib.c | 51 |
1 files changed, 0 insertions, 51 deletions
diff --git a/ArmPkg/Library/ArmGicArchSecLib/Arm/ArmGicArchLib.c b/ArmPkg/Library/ArmGicArchSecLib/Arm/ArmGicArchLib.c deleted file mode 100644 index f256de7046..0000000000 --- a/ArmPkg/Library/ArmGicArchSecLib/Arm/ArmGicArchLib.c +++ /dev/null @@ -1,51 +0,0 @@ -/** @file
-*
-* Copyright (c) 2014, 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 <Library/ArmLib.h>
-#include <Library/ArmGicLib.h>
-
-ARM_GIC_ARCH_REVISION
-EFIAPI
-ArmGicGetSupportedArchRevision (
- VOID
- )
-{
- UINT32 IccSre;
-
- // Ideally we would like to use the GICC IIDR Architecture version here, but
- // this does not seem to be very reliable as the implementation could easily
- // get it wrong. It is more reliable to check if the GICv3 System Register
- // feature is implemented on the CPU. This is also convenient as our GICv3
- // driver requires SRE. If only Memory mapped access is available we try to
- // drive the GIC as a v2.
- if (ArmReadIdPfr1 () & ARM_PFR1_GIC) {
- // Make sure System Register access is enabled (SRE). This depends on the
- // higher privilege level giving us permission, otherwise we will either
- // cause an exception here, or the write doesn't stick in which case we need
- // to fall back to the GICv2 MMIO interface.
- // Note: We do not need to set ICC_SRE_EL2.Enable because the OS is started
- // at the same exception level.
- // It is the OS responsibility to set this bit.
- IccSre = ArmGicV3GetControlSystemRegisterEnable ();
- if (!(IccSre & ICC_SRE_EL2_SRE)) {
- ArmGicV3SetControlSystemRegisterEnable (IccSre| ICC_SRE_EL2_SRE);
- IccSre = ArmGicV3GetControlSystemRegisterEnable ();
- }
- if (IccSre & ICC_SRE_EL2_SRE) {
- return ARM_GIC_ARCH_REVISION_3;
- }
- }
-
- return ARM_GIC_ARCH_REVISION_2;
-}
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