From: evan.lloyd@arm.com
To: edk2-devel@ml01.01.org
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>,
Leif Lindholm <leif.lindholm@linaro.org>,
Ryan Harkin <ryan.harkin@linaro.org>,
Matteo Carlini <Matteo.Carlini@arm.com>
Subject: [PATCH 1/2] ArmPkg: Add CNTHCTL_EL2 support functions
Date: Tue, 16 May 2017 11:10:44 +0100 [thread overview]
Message-ID: <20170516101045.14288-2-evan.lloyd@arm.com> (raw)
In-Reply-To: <20170516101045.14288-1-evan.lloyd@arm.com>
From: Sami Mujawar <sami.mujawar@arm.com>
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>
---
ArmPkg/Include/Chipset/AArch64.h | 12 +++++++++++-
ArmPkg/Library/ArmLib/AArch64/AArch64Support.S | 10 ++++++++++
2 files changed, 21 insertions(+), 1 deletion(-)
diff --git a/ArmPkg/Include/Chipset/AArch64.h b/ArmPkg/Include/Chipset/AArch64.h
index cebfc5da426a44bb97505ed9c1da3b2b2e35a0cc..76c2cc735ef3196273b28c7a804048d8e1f6d123 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 6e8074a4868979d2fa3b850e1e588862179f829a..dde6a756528f3abf1bd5a142448e42122a9bd8fa 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
--
Guid("CE165669-3EF3-493F-B85D-6190EE5B9759")
next prev parent reply other threads:[~2017-05-16 10:11 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-05-16 10:10 [PATCH 0/2] Initialize CNTHCTL evan.lloyd
2017-05-16 10:10 ` evan.lloyd [this message]
2017-05-16 10:10 ` [PATCH 2/2] ArmPlatformPkg: Timer access for non-secure EL1/0 evan.lloyd
2017-05-22 14:55 ` [PATCH 0/2] Initialize CNTHCTL Leif Lindholm
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