From: Sami Mujawar <[email protected]> Added helper functions for reading and writing the CNTHCTL_EL2 register.
Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Sami Mujawar <[email protected]> Signed-off-by: Evan Lloyd <[email protected]> --- 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") _______________________________________________ edk2-devel mailing list [email protected] https://lists.01.org/mailman/listinfo/edk2-devel
