| 1 | /* int.c --- M32C interrupt handling. |
| 2 | |
| 3 | Copyright (C) 2005 Free Software Foundation, Inc. |
| 4 | Contributed by Red Hat, Inc. |
| 5 | |
| 6 | This file is part of the GNU simulators. |
| 7 | |
| 8 | The GNU simulators are free software; you can redistribute them and/or |
| 9 | modify them under the terms of the GNU General Public License as |
| 10 | published by the Free Software Foundation; either version 2 of the |
| 11 | License, or (at your option) any later version. |
| 12 | |
| 13 | The GNU simulators are distributed in the hope that they will be |
| 14 | useful, but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 16 | General Public License for more details. |
| 17 | |
| 18 | You should have received a copy of the GNU General Public License |
| 19 | along with the GNU simulators; if not, write to the Free Software |
| 20 | Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
| 21 | 02110-1301, USA */ |
| 22 | |
| 23 | |
| 24 | #include "int.h" |
| 25 | #include "cpu.h" |
| 26 | #include "mem.h" |
| 27 | |
| 28 | void |
| 29 | trigger_fixed_interrupt (int addr) |
| 30 | { |
| 31 | int s = get_reg (sp); |
| 32 | int f = get_reg (flags); |
| 33 | int p = get_reg (pc); |
| 34 | |
| 35 | if (A16) |
| 36 | { |
| 37 | s -= 4; |
| 38 | put_reg (sp, s); |
| 39 | mem_put_hi (s, p); |
| 40 | mem_put_qi (s + 2, f); |
| 41 | mem_put_qi (s + 3, ((f >> 4) & 0x0f) | (p >> 16)); |
| 42 | } |
| 43 | else |
| 44 | { |
| 45 | s -= 6; |
| 46 | put_reg (sp, s); |
| 47 | mem_put_si (s, p); |
| 48 | mem_put_hi (s + 4, f); |
| 49 | } |
| 50 | put_reg (pc, mem_get_psi (addr)); |
| 51 | set_flags (FLAGBIT_U | FLAGBIT_I | FLAGBIT_D, 0); |
| 52 | } |
| 53 | |
| 54 | void |
| 55 | trigger_based_interrupt (int vector) |
| 56 | { |
| 57 | int addr = get_reg (intb) + vector * 4; |
| 58 | if (vector <= 31) |
| 59 | set_flags (FLAGBIT_U, 0); |
| 60 | trigger_fixed_interrupt (addr); |
| 61 | } |