target/nios2: take BQL around interrupt check
[qemu.git] / target / nios2 / op_helper.c
1 /*
2 * Altera Nios II helper routines.
3 *
4 * Copyright (C) 2012 Chris Wulff <crwulff@gmail.com>
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, see
18 * <http://www.gnu.org/licenses/lgpl-2.1.html>
19 */
20
21 #include "cpu.h"
22 #include "exec/helper-proto.h"
23 #include "exec/cpu_ldst.h"
24 #include "qemu/main-loop.h"
25
26 #if !defined(CONFIG_USER_ONLY)
27 void helper_mmu_read_debug(CPUNios2State *env, uint32_t rn)
28 {
29 mmu_read_debug(env, rn);
30 }
31
32 void helper_mmu_write(CPUNios2State *env, uint32_t rn, uint32_t v)
33 {
34 mmu_write(env, rn, v);
35 }
36
37 void helper_check_interrupts(CPUNios2State *env)
38 {
39 qemu_mutex_lock_iothread();
40 nios2_check_interrupts(env);
41 qemu_mutex_unlock_iothread();
42 }
43 #endif /* !CONFIG_USER_ONLY */
44
45 void helper_raise_exception(CPUNios2State *env, uint32_t index)
46 {
47 CPUState *cs = ENV_GET_CPU(env);
48 cs->exception_index = index;
49 cpu_loop_exit(cs);
50 }