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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>
32 lines
630 B
ArmAsm
32 lines
630 B
ArmAsm
#------------------------------------------------------------------------------
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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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.text
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.p2align 2
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GCC_ASM_EXPORT(ArmReadIdIsar0)
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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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ASM_PFX(ArmReadIdIsar0):
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mrs x0, id_aa64isar0_el1 // Read ID_AA64ISAR0 Register
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ret
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