MdePkg/Library/BaseLib/RiscV64/RiscVInterrupt.S

   1 //------------------------------------------------------------------------------
   2 //
   3 // RISC-V Supervisor Mode interrupt enable/disable
   4 //
   5 // Copyright (c) 2020, Hewlett Packard Enterprise Development LP. All rights reserved.<BR>
   6 //
   7 // SPDX-License-Identifier: BSD-2-Clause-Patent
   8 //
   9 //------------------------------------------------------------------------------
  10
  11 ASM_GLOBAL ASM_PFX(RiscVDisableSupervisorModeInterrupts)
  12 ASM_GLOBAL ASM_PFX(RiscVEnableSupervisorModeInterrupt)
  13 ASM_GLOBAL ASM_PFX(RiscVGetSupervisorModeInterrupts)
  14
  15 # define  MSTATUS_SIE    0x00000002
  16 # define  CSR_SSTATUS    0x100
  17
  18 ASM_PFX(RiscVDisableSupervisorModeInterrupts):
  19   li   a1, MSTATUS_SIE
  20   csrc CSR_SSTATUS, a1
  21   ret
  22
  23 ASM_PFX(RiscVEnableSupervisorModeInterrupt):
  24   li   a1, MSTATUS_SIE
  25   csrs CSR_SSTATUS, a1
  26   ret
  27
  28 ASM_PFX(RiscVGetSupervisorModeInterrupts):
  29   csrr a0, CSR_SSTATUS
  30   andi a0, a0, MSTATUS_SIE
  31   ret
  32