MdePkg: add null version of RngLib

[mirror_edk2.git] / MdePkg / Library / BaseLib / Arm / GetInterruptsState.asm

;------------------------------------------------------------------------------\r
;\r
; GetInterruptState() function for ARM\r
;\r
; Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>\r
; Portions copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>\r
; SPDX-License-Identifier: BSD-2-Clause-Patent\r
;\r
;------------------------------------------------------------------------------\r
\r
    EXPORT GetInterruptState\r
\r
    AREA Interrupt_enable, CODE, READONLY\r
\r
;/**\r
;  Retrieves the current CPU interrupt state.\r
;\r
;  Returns TRUE is interrupts are currently enabled. Otherwise\r
;  returns FALSE.\r
;\r
;  @retval TRUE  CPU interrupts are enabled.\r
;  @retval FALSE CPU interrupts are disabled.\r
;\r
;**/\r
;\r
;BOOLEAN\r
;EFIAPI\r
;GetInterruptState (\r
;  VOID\r
; );\r
;\r
GetInterruptState\r
    MRS     R0, CPSR\r
    TST     R0, #0x80                ;Check if IRQ is enabled.\r
    MOVEQ   R0, #1\r
    MOVNE   R0, #0\r
    BX      LR\r
\r
    END\r