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| author | Sami Mujawar <sami.mujawar@arm.com> | 2017-05-16 11:10:44 +0100 |
|---|---|---|
| committer | Leif Lindholm <leif.lindholm@linaro.org> | 2017-05-22 15:19:34 +0100 |
| commit | 23d6348f924d27e72acdb3b5747ca26697e677e1 (patch) | |
| tree | 0e31cfcdf36215fb64dba251fb248b5be4631293 /ArmPkg | |
| parent | 7320b8ed1879b31657a8d6a62e6cd0ff1f645754 (diff) | |
| download | edk2-23d6348f924d27e72acdb3b5747ca26697e677e1.tar.gz edk2-23d6348f924d27e72acdb3b5747ca26697e677e1.tar.bz2 edk2-23d6348f924d27e72acdb3b5747ca26697e677e1.zip | |
ArmPkg: Add CNTHCTL_EL2 support functions
Added helper functions for reading and writing the
CNTHCTL_EL2 register.
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Sami Mujawar <sami.mujawar@arm.com>
Signed-off-by: Evan Lloyd <evan.lloyd@arm.com>
Reviewed-by: Leif Lindholm <leif.lindholm@linaro.org>
Diffstat (limited to 'ArmPkg')
| -rw-r--r-- | ArmPkg/Include/Chipset/AArch64.h | 12 | ||||
| -rw-r--r-- | ArmPkg/Library/ArmLib/AArch64/AArch64Support.S | 10 |
2 files changed, 21 insertions, 1 deletions
diff --git a/ArmPkg/Include/Chipset/AArch64.h b/ArmPkg/Include/Chipset/AArch64.h index cebfc5da42..76c2cc735e 100644 --- a/ArmPkg/Include/Chipset/AArch64.h +++ b/ArmPkg/Include/Chipset/AArch64.h @@ -1,7 +1,7 @@ /** @file
Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
- Copyright (c) 2011 - 2015, ARM Ltd. All rights reserved.<BR>
+ Copyright (c) 2011 - 2017, ARM Ltd. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
@@ -235,4 +235,14 @@ ArmWriteCptr ( IN UINT64 Cptr
);
+UINT32
+ArmReadCntHctl (
+ VOID
+ );
+
+VOID
+ArmWriteCntHctl (
+ IN UINT32 CntHctl
+ );
+
#endif // __AARCH64_H__
diff --git a/ArmPkg/Library/ArmLib/AArch64/AArch64Support.S b/ArmPkg/Library/ArmLib/AArch64/AArch64Support.S index 6e8074a486..dde6a75652 100644 --- a/ArmPkg/Library/ArmLib/AArch64/AArch64Support.S +++ b/ArmPkg/Library/ArmLib/AArch64/AArch64Support.S @@ -480,4 +480,14 @@ ASM_FUNC(ArmReadCurrentEL) mrs x0, CurrentEL
ret
+// UINT32 ArmReadCntHctl(VOID)
+ASM_FUNC(ArmReadCntHctl)
+ mrs x0, cnthctl_el2
+ ret
+
+// VOID ArmWriteCntHctl(UINT32 CntHctl)
+ASM_FUNC(ArmWriteCntHctl)
+ msr cnthctl_el2, x0
+ ret
+
ASM_FUNCTION_REMOVE_IF_UNREFERENCED
|