1 #------------------------------------------------------------------------------
3 # GetInterruptState() function for AArch64
5 # Copyright (c) 2006 - 2009, Intel Corporation. All rights reserved.<BR>
6 # Portions copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
7 # Portions copyright (c) 2011 - 2013, ARM Ltd. All rights reserved.<BR>
8 # This program and the accompanying materials
9 # are licensed and made available under the terms and conditions of the BSD License
10 # which accompanies this distribution. The full text of the license may be found at
11 # http://opensource.org/licenses/bsd-license.php.
13 # THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
14 # WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
16 #------------------------------------------------------------------------------
20 GCC_ASM_EXPORT(GetInterruptState)
22 .set DAIF_RD_IRQ_BIT, (1 << 7)
25 # Retrieves the current CPU interrupt state.
27 # Returns TRUE is interrupts are currently enabled. Otherwise
30 # @retval TRUE CPU interrupts are enabled.
31 # @retval FALSE CPU interrupts are disabled.
41 ASM_PFX(GetInterruptState):
43 tst x0, #DAIF_RD_IRQ_BIT // Check IRQ mask; set Z=1 if clear/unmasked
44 cset w0, eq // if Z=1 (eq) return 1, else 0