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9301e5644c
Make BaseRngLib more generic by moving x86-specific functionality into 'Rand' and adding files under 'AArch64' to support the optional ARMv8.5 RNG instruction RNDR that is a part of FEAT_RNG. Signed-off-by: Rebecca Cran <rebecca@nuviainc.com> Reviewed-by: Liming Gao <gaoliming@byosoft.com.cn> Reviewed-by: Sami Mujawar <sami.mujawar@arm.com>
31 lines
639 B
NASM
31 lines
639 B
NASM
;------------------------------------------------------------------------------
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;
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; ArmReadIdIsar0() for AArch64
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;
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; Copyright (c) 2021, NUVIA Inc. All rights reserved.<BR>
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;
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; SPDX-License-Identifier: BSD-2-Clause-Patent
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;
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;------------------------------------------------------------------------------
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EXPORT ArmReadIdIsar0
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AREA BaseLib_LowLevel, CODE, READONLY
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;/**
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; Reads the ID_AA64ISAR0 Register.
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;
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; @return The contents of the ID_AA64ISAR0 register.
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;
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;**/
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;UINT64
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;EFIAPI
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;ArmReadIdIsar0 (
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; VOID
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; );
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;
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ArmReadIdIsar0
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mrs x0, id_aa64isar0_el1 // Read ID_AA64ISAR0 Register
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ret
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END
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