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 ;------------------------------------------------------------------------------
18 EXPORT GetInterruptState
19 AREA BaseLib_LowLevel, CODE, READONLY
21 DAIF_RD_IRQ_BIT EQU (1 << 7)
24 ; Retrieves the current CPU interrupt state.
26 ; Returns TRUE is interrupts are currently enabled. Otherwise
29 ; @retval TRUE CPU interrupts are enabled.
30 ; @retval FALSE CPU interrupts are disabled.
43 tst x0, #DAIF_RD_IRQ_BIT // Check IRQ mask; set Z=1 if clear/unmasked
44 bne exit // if Z=1 (eq) return 1, else 0