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| author | Leif Lindholm <leif@nuviainc.com> | 2020-12-18 11:55:52 +0000 |
|---|---|---|
| committer | mergify[bot] <37929162+mergify[bot]@users.noreply.github.com> | 2020-12-18 15:27:26 +0000 |
| commit | 5cc25cff5de191583f3ecb2d9a7e9a13baa70071 (patch) | |
| tree | 1c83d57184b39170cb8cb2f2c8973cb1edef4c39 /ArmPkg/Library | |
| parent | 6573ae8c85750a0badb902eb9ffe37b13fc74ba6 (diff) | |
| download | edk2-5cc25cff5de191583f3ecb2d9a7e9a13baa70071.tar.gz edk2-5cc25cff5de191583f3ecb2d9a7e9a13baa70071.tar.bz2 edk2-5cc25cff5de191583f3ecb2d9a7e9a13baa70071.zip | |
ArmPkg/ArmLib: add ArmHasGicSystemRegisters () helper function
Create a helper function to eliminate direct feature register reading,
which gets messy in code shared between ARM/AArch64.
Returns BOOLEAN True if the CPU implements the GIC System Register
Interface (any version), otherwise returns BOOL False.
Cc: Ard Biesheuvel <ard.biesheuvel@arm.com>
Signed-off-by: Leif Lindholm <leif@nuviainc.com>
Reviewed-by: Ard Biesheuvel <ard.biesheuvel@arm.com>
Diffstat (limited to 'ArmPkg/Library')
| -rw-r--r-- | ArmPkg/Library/ArmLib/AArch64/AArch64Lib.c | 16 | ||||
| -rw-r--r-- | ArmPkg/Library/ArmLib/Arm/ArmV7Lib.c | 16 |
2 files changed, 32 insertions, 0 deletions
diff --git a/ArmPkg/Library/ArmLib/AArch64/AArch64Lib.c b/ArmPkg/Library/ArmLib/AArch64/AArch64Lib.c index 3fbd591192..5b10eb33c9 100644 --- a/ArmPkg/Library/ArmLib/AArch64/AArch64Lib.c +++ b/ArmPkg/Library/ArmLib/AArch64/AArch64Lib.c @@ -2,6 +2,7 @@ Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
Portions copyright (c) 2011 - 2014, ARM Ltd. All rights reserved.<BR>
+ Copyright (c) 2020, NUVIA Inc. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
@@ -71,3 +72,18 @@ ArmCleanDataCache ( ArmDataSynchronizationBarrier ();
AArch64DataCacheOperation (ArmCleanDataCacheEntryBySetWay);
}
+
+/**
+ Check whether the CPU supports the GIC system register interface (any version)
+
+ @return Whether GIC System Register Interface is supported
+
+**/
+BOOLEAN
+EFIAPI
+ArmHasGicSystemRegisters (
+ VOID
+ )
+{
+ return ((ArmReadIdPfr0 () & AARCH64_PFR0_GIC) != 0);
+}
diff --git a/ArmPkg/Library/ArmLib/Arm/ArmV7Lib.c b/ArmPkg/Library/ArmLib/Arm/ArmV7Lib.c index 2c4a23e1a1..3faada3a65 100644 --- a/ArmPkg/Library/ArmLib/Arm/ArmV7Lib.c +++ b/ArmPkg/Library/ArmLib/Arm/ArmV7Lib.c @@ -2,6 +2,7 @@ Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
Copyright (c) 2011 - 2014, ARM Limited. All rights reserved.
+ Copyright (c) 2020, NUVIA Inc. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
@@ -71,3 +72,18 @@ ArmCleanDataCache ( ArmDataSynchronizationBarrier ();
ArmV7DataCacheOperation (ArmCleanDataCacheEntryBySetWay);
}
+
+/**
+ Check whether the CPU supports the GIC system register interface (any version)
+
+ @return Whether GIC System Register Interface is supported
+
+**/
+BOOLEAN
+EFIAPI
+ArmHasGicSystemRegisters (
+ VOID
+ )
+{
+ return ((ArmReadIdPfr1 () & ARM_PFR1_GIC) != 0);
+}
|