MdePkg/Library/BaseLib/LoongArch64/GetInterruptState.S

   1 #------------------------------------------------------------------------------
   2 #
   3 # Get LoongArch interrupt status
   4 #
   5 # Copyright (c) 2022, Loongson Technology Corporation Limited. All rights reserved.<BR>
   6 #
   7 # SPDX-License-Identifier: BSD-2-Clause-Patent
   8 #
   9 #------------------------------------------------------------------------------
  10
  11 ASM_GLOBAL ASM_PFX(GetInterruptState)
  12
  13 #/**
  14 #  Retrieves the current CPU interrupt state.
  15 #
  16 #  Returns TRUE means interrupts are currently enabled. Otherwise,
  17 #  returns FALSE.
  18 #
  19 #  @retval TRUE  CPU interrupts are enabled.
  20 #  @retval FALSE CPU interrupts are disabled.
  21 #
  22 #**/
  23
  24 ASM_PFX(GetInterruptState):
  25   li.w  $t1, 0x4
  26   csrrd $t0, 0x0
  27   and   $t0, $t0, $t1
  28   beqz  $t0, 1f
  29   li.w  $a0, 0x1
  30   b     2f
  31 1:
  32   li.w  $a0, 0x0
  33 2:
  34   jirl  $zero, $ra, 0
  35   .end