| #------------------------------------------------------------------------------ | |
| # | |
| # GetInterruptState() function for AArch64 | |
| # | |
| # Copyright (c) 2006 - 2009, Intel Corporation. All rights reserved.<BR> | |
| # Portions copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR> | |
| # Portions copyright (c) 2011 - 2013, ARM Ltd. All rights reserved.<BR> | |
| # SPDX-License-Identifier: BSD-2-Clause-Patent | |
| # | |
| #------------------------------------------------------------------------------ | |
| .text | |
| .p2align 2 | |
| GCC_ASM_EXPORT(GetInterruptState) | |
| .set DAIF_RD_IRQ_BIT, (1 << 7) | |
| #/** | |
| # Retrieves the current CPU interrupt state. | |
| # | |
| # Returns TRUE is interrupts are currently enabled. Otherwise | |
| # returns FALSE. | |
| # | |
| # @retval TRUE CPU interrupts are enabled. | |
| # @retval FALSE CPU interrupts are disabled. | |
| # | |
| #**/ | |
| # | |
| #BOOLEAN | |
| #EFIAPI | |
| #GetInterruptState ( | |
| # VOID | |
| # ); | |
| # | |
| ASM_PFX(GetInterruptState): | |
| AARCH64_BTI(c) | |
| mrs x0, daif | |
| tst x0, #DAIF_RD_IRQ_BIT // Check IRQ mask; set Z=1 if clear/unmasked | |
| cset w0, eq // if Z=1 (eq) return 1, else 0 | |
| ret |