libgcc/config/nds32/isr-library/adj_intr_lvl.inc

   1 /* c-isr library stuff of Andes NDS32 cpu for GNU compiler
   2    Copyright (C) 2012-2019 Free Software Foundation, Inc.
   3    Contributed by Andes Technology Corporation.
   4
   5    This file is part of GCC.
   6
   7    GCC is free software; you can redistribute it and/or modify it
   8    under the terms of the GNU General Public License as published
   9    by the Free Software Foundation; either version 3, or (at your
  10    option) any later version.
  11
  12    GCC is distributed in the hope that it will be useful, but WITHOUT
  13    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  14    or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
  15    License for more details.
  16
  17    Under Section 7 of GPL version 3, you are granted additional
  18    permissions described in the GCC Runtime Library Exception, version
  19    3.1, as published by the Free Software Foundation.
  20
  21    You should have received a copy of the GNU General Public License and
  22    a copy of the GCC Runtime Library Exception along with this program;
  23    see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  24    <http://www.gnu.org/licenses/>.  */
  25
  26 .macro ADJ_INTR_LVL
  27 #if defined(NDS32_NESTED) /* Nested handler.  */
  28         mfsr    $r3, $PSW
  29         /* By substracting 1 from $PSW, we can lower PSW.INTL
  30            and enable GIE simultaneously.  */
  31         addi    $r3, $r3, #-0x1
  32   #if __NDS32_EXT_ZOL__ || __NDS32_EXT_DSP__
  33     ori   $r3, $r3, 0x2000  /* Set PSW.AEN(b'13) */
  34   #endif
  35         mtsr    $r3, $PSW
  36 #elif defined(NDS32_NESTED_READY) /* Nested ready handler.  */
  37         /* Save ipc and ipsw and lower INT level.  */
  38         mfsr    $r3, $PSW
  39         addi    $r3, $r3, #-0x2
  40   #if __NDS32_EXT_ZOL__ || __NDS32_EXT_DSP__
  41     ori   $r3, $r3, 0x2000  /* Set PSW.AEN(b'13) */
  42   #endif
  43         mtsr    $r3, $PSW
  44 #else /* Not nested handler.  */
  45   #if __NDS32_EXT_ZOL__ || __NDS32_EXT_DSP__
  46     mfsr        $r3, $PSW
  47     ori   $r3, $r3, 0x2000  /* Set PSW.AEN(b'13) */
  48     mtsr        $r3, $PSW
  49   #endif
  50 #endif
  51 .endm