| #------------------------------------------------------------------------------ | |
| # | |
| # ArmReadIdIsar0() for AArch64 | |
| # | |
| # Copyright (c) 2021, NUVIA Inc. All rights reserved.<BR> | |
| # | |
| # SPDX-License-Identifier: BSD-2-Clause-Patent | |
| # | |
| #------------------------------------------------------------------------------ | |
| .text | |
| .p2align 2 | |
| GCC_ASM_EXPORT(ArmReadIdIsar0) | |
| #/** | |
| # Reads the ID_AA64ISAR0 Register. | |
| # | |
| # @return The contents of the ID_AA64ISAR0 register. | |
| # | |
| #**/ | |
| #UINT64 | |
| #EFIAPI | |
| #ArmReadIdIsar0 ( | |
| # VOID | |
| # ); | |
| # | |
| ASM_PFX(ArmReadIdIsar0): | |
| AARCH64_BTI(c) | |
| mrs x0, id_aa64isar0_el1 // Read ID_AA64ISAR0 Register | |
| ret |