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1 | /* int.c --- M32C interrupt handling. |
2 | ||
9b254dd1 | 3 | Copyright (C) 2005, 2007, 2008 Free Software Foundation, Inc. |
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4 | Contributed by Red Hat, Inc. |
5 | ||
6 | This file is part of the GNU simulators. | |
7 | ||
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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 3 of the License, or | |
11 | (at your option) any later version. | |
d45a4bef | 12 | |
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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. | |
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17 | |
18 | You should have received a copy of the GNU General Public License | |
4744ac1b | 19 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
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20 | |
21 | ||
22 | #include "int.h" | |
23 | #include "cpu.h" | |
24 | #include "mem.h" | |
25 | ||
26 | void | |
27 | trigger_fixed_interrupt (int addr) | |
28 | { | |
29 | int s = get_reg (sp); | |
30 | int f = get_reg (flags); | |
31 | int p = get_reg (pc); | |
32 | ||
33 | if (A16) | |
34 | { | |
35 | s -= 4; | |
36 | put_reg (sp, s); | |
37 | mem_put_hi (s, p); | |
38 | mem_put_qi (s + 2, f); | |
39 | mem_put_qi (s + 3, ((f >> 4) & 0x0f) | (p >> 16)); | |
40 | } | |
41 | else | |
42 | { | |
43 | s -= 6; | |
44 | put_reg (sp, s); | |
45 | mem_put_si (s, p); | |
46 | mem_put_hi (s + 4, f); | |
47 | } | |
48 | put_reg (pc, mem_get_psi (addr)); | |
49 | set_flags (FLAGBIT_U | FLAGBIT_I | FLAGBIT_D, 0); | |
50 | } | |
51 | ||
52 | void | |
53 | trigger_based_interrupt (int vector) | |
54 | { | |
55 | int addr = get_reg (intb) + vector * 4; | |
56 | if (vector <= 31) | |
57 | set_flags (FLAGBIT_U, 0); | |
58 | trigger_fixed_interrupt (addr); | |
59 | } |