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9304f876 | 1 | /* c-isr library stuff of Andes NDS32 cpu for GNU compiler |
a5544970 | 2 | Copyright (C) 2012-2019 Free Software Foundation, Inc. |
9304f876 CJW |
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 | |
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29 | /* By substracting 1 from $PSW, we can lower PSW.INTL |
30 | and enable GIE simultaneously. */ | |
9304f876 | 31 | addi $r3, $r3, #-0x1 |
a4931745 CJW |
32 | #if __NDS32_EXT_ZOL__ || __NDS32_EXT_DSP__ |
33 | ori $r3, $r3, 0x2000 /* Set PSW.AEN(b'13) */ | |
34 | #endif | |
9304f876 CJW |
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 | |
a4931745 CJW |
40 | #if __NDS32_EXT_ZOL__ || __NDS32_EXT_DSP__ |
41 | ori $r3, $r3, 0x2000 /* Set PSW.AEN(b'13) */ | |
42 | #endif | |
9304f876 CJW |
43 | mtsr $r3, $PSW |
44 | #else /* Not nested handler. */ | |
a4931745 CJW |
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 | |
9304f876 CJW |
50 | #endif |
51 | .endm |