1 #------------------------------------------------------------------------------ 2 # 3 # GetInterruptState() function for AArch64 4 # 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. 12 # 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. 15 # 16 #------------------------------------------------------------------------------ 17 18 .text 19 .p2align 2 20 GCC_ASM_EXPORT(GetInterruptState) 21 22 #/** 23 # Retrieves the current CPU interrupt state. 24 # 25 # Returns TRUE is interrupts are currently enabled. Otherwise 26 # returns FALSE. 27 # 28 # @retval TRUE CPU interrupts are enabled. 29 # @retval FALSE CPU interrupts are disabled. 30 # 31 #**/ 32 # 33 #BOOLEAN 34 #EFIAPI 35 #GetInterruptState ( 36 # VOID 37 # ); 38 # 39 ASM_PFX(GetInterruptState): 40 mrs x0, daif 41 tst x0, #2 // Check if IRQ is enabled. Enabled if 0. 42 mov w0, #0 43 mov w1, #1 44 csel w0, w1, w0, ne 45 ret 46
