sim/bfin/linux-fixed-code.s

   1 /* Linux fixed code userspace ABI
   2
   3    Copyright (C) 2005-2023 Free Software Foundation, Inc.
   4    Contributed by Analog Devices, Inc.
   5
   6    This file is part of simulators.
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 2 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  20
  21 /* For more info, see this page:
  22    http://docs.blackfin.uclinux.org/doku.php?id=linux-kernel:fixed-code  */
  23
  24 .text
  25
  26 .align 16
  27 _sigreturn_stub:
  28         P0 = 173;
  29         EXCPT 0;
  30 0:      JUMP.S 0b;
  31
  32 .align 16
  33 _atomic_xchg32:
  34         R0 = [P0];
  35         [P0] = R1;
  36         rts;
  37
  38 .align 16
  39 _atomic_cas32:
  40         R0 = [P0];
  41         CC = R0 == R1;
  42         IF !CC JUMP 1f;
  43         [P0] = R2;
  44 1:
  45         rts;
  46
  47 .align 16
  48 _atomic_add32:
  49         R1 = [P0];
  50         R0 = R1 + R0;
  51         [P0] = R0;
  52         rts;
  53
  54 .align 16
  55 _atomic_sub32:
  56         R1 = [P0];
  57         R0 = R1 - R0;
  58         [P0] = R0;
  59         rts;
  60
  61 .align 16
  62 _atomic_ior32:
  63         R1 = [P0];
  64         R0 = R1 | R0;
  65         [P0] = R0;
  66         rts;
  67
  68 .align 16
  69 _atomic_and32:
  70         R1 = [P0];
  71         R0 = R1 & R0;
  72         [P0] = R0;
  73         rts;
  74
  75 .align 16
  76 _atomic_xor32:
  77         R1 = [P0];
  78         R0 = R1 ^ R0;
  79         [P0] = R0;
  80         rts;
  81
  82 .align 16
  83 _safe_user_instruction:
  84         NOP; NOP; NOP; NOP;
  85         EXCPT 0x4;