projects / mirror_edk2.git / blame
| Commit | Line | Data |
|---|---|---|
| 807e2604 HL |
1 | #------------------------------------------------------------------------------\r |
| 2 | #\r | |
| 3 | # GetInterruptState() function for AArch64\r | |
| 4 | #\r | |
| 5 | # Copyright (c) 2006 - 2009, Intel Corporation. All rights reserved.<BR>\r | |
| 6 | # Portions copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>\r | |
| 7 | # Portions copyright (c) 2011 - 2013, ARM Ltd. All rights reserved.<BR>\r | |
| 8 | # This program and the accompanying materials\r | |
| 9 | # are licensed and made available under the terms and conditions of the BSD License\r | |
| 10 | # which accompanies this distribution. The full text of the license may be found at\r | |
| 11 | # http://opensource.org/licenses/bsd-license.php.\r | |
| 12 | #\r | |
| 13 | # THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
| 14 | # WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
| 15 | #\r | |
| 16 | #------------------------------------------------------------------------------\r | |
| 17 | \r | |
| 18 | .text\r | |
| 19 | .p2align 2\r | |
| 20 | ASM_GLOBAL ASM_PFX(GetInterruptState)\r | |
| 21 | \r | |
| 22 | #/**\r | |
| 23 | # Retrieves the current CPU interrupt state.\r | |
| 24 | #\r | |
| 25 | # Returns TRUE is interrupts are currently enabled. Otherwise\r | |
| 26 | # returns FALSE.\r | |
| 27 | #\r | |
| 28 | # @retval TRUE CPU interrupts are enabled.\r | |
| 29 | # @retval FALSE CPU interrupts are disabled.\r | |
| 30 | #\r | |
| 31 | #**/\r | |
| 32 | #\r | |
| 33 | #BOOLEAN\r | |
| 34 | #EFIAPI\r | |
| 35 | #GetInterruptState (\r | |
| 36 | # VOID\r | |
| 37 | # );\r | |
| 38 | #\r | |
| 39 | ASM_PFX(GetInterruptState):\r | |
| 40 | mrs x0, daif\r | |
| 41 | tst x0, #2 // Check if IRQ is enabled. Enabled if 0.\r | |
| 42 | mov w0, #0\r | |
| 43 | mov w1, #1\r | |
| 44 | csel w0, w1, w0, ne\r | |
| 45 | ret\r |