From: Pierre Gondois <pierre.gond...@arm.com> Add a ArmReadIdIsar0() helper function to access the AArch64 ID_ISAR0_EL1 register.
Signed-off-by: Pierre Gondois <pierre.gond...@arm.com> --- ArmPkg/Library/ArmLib/AArch64/AArch64Lib.h | 12 +++++++++++- ArmPkg/Library/ArmLib/AArch64/AArch64Support.S | 7 ++++++- 2 files changed, 17 insertions(+), 2 deletions(-) diff --git a/ArmPkg/Library/ArmLib/AArch64/AArch64Lib.h b/ArmPkg/Library/ArmLib/AArch64/AArch64Lib.h index 330481fc50db..105a52ee16fe 100644 --- a/ArmPkg/Library/ArmLib/AArch64/AArch64Lib.h +++ b/ArmPkg/Library/ArmLib/AArch64/AArch64Lib.h @@ -1,7 +1,7 @@ /** @file Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR> - Portions Copyright (c) 2011 - 2013, ARM Ltd. All rights reserved.<BR> + Portions Copyright (c) 2011 - 2022, Arm Ltd. All rights reserved.<BR> Copyright (c) 2020, NUVIA Inc. All rights reserved.<BR> SPDX-License-Identifier: BSD-2-Clause-Patent @@ -54,4 +54,14 @@ ArmReadIdAA64Mmfr2 ( VOID ); +/** Reads the ID_ISAR0_EL1 register. + + @return The contents of the ID_ISAR0_EL1 register. +**/ +UINTN +EFIAPI +ArmReadIdIsar0 ( + VOID + ); + #endif // AARCH64_LIB_H_ diff --git a/ArmPkg/Library/ArmLib/AArch64/AArch64Support.S b/ArmPkg/Library/ArmLib/AArch64/AArch64Support.S index d3cc1e86716b..baba283d01b9 100644 --- a/ArmPkg/Library/ArmLib/AArch64/AArch64Support.S +++ b/ArmPkg/Library/ArmLib/AArch64/AArch64Support.S @@ -1,7 +1,7 @@ #------------------------------------------------------------------------------ # # Copyright (c) 2008 - 2010, Apple Inc. All rights reserved.<BR> -# Copyright (c) 2011 - 2017, ARM Limited. All rights reserved. +# Copyright (c) 2011 - 2022, Arm Limited. All rights reserved. # Copyright (c) 2016, Linaro Limited. All rights reserved. # Copyright (c) 2020, NUVIA Inc. All rights reserved. # @@ -482,4 +482,9 @@ ASM_FUNC(ArmWriteCntHctl) msr cnthctl_el2, x0 ret +// UINTN ArmReadIdIsar0(VOID) +ASM_FUNC(ArmReadIdIsar0) + mrs x0, id_aa64isar0_el1 + ret + ASM_FUNCTION_REMOVE_IF_UNREFERENCED -- 2.25.1 -=-=-=-=-=-=-=-=-=-=-=- Groups.io Links: You receive all messages sent to this group. View/Reply Online (#93953): https://edk2.groups.io/g/devel/message/93953 Mute This Topic: https://groups.io/mt/93788881/21656 Group Owner: devel+ow...@edk2.groups.io Unsubscribe: https://edk2.groups.io/g/devel/unsub [arch...@mail-archive.com] -=-=-=-=-=-=-=-=-=-=-=-
