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d45a4bef JB |
1 | /* int.c --- M32C interrupt handling. |
2 | ||
6aba47ca | 3 | Copyright (C) 2005, 2007 Free Software Foundation, Inc. |
d45a4bef JB |
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 | } |