Merge remote-tracking branch 'remotes/jsnow-gitlab/tags/python-pull-request' into...
[qemu.git] / hw / mips / mips_int.c
1 /*
2 * QEMU MIPS interrupt support
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a copy
5 * of this software and associated documentation files (the "Software"), to deal
6 * in the Software without restriction, including without limitation the rights
7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
8 * copies of the Software, and to permit persons to whom the Software is
9 * furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
13 *
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
17 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
20 * THE SOFTWARE.
21 */
22
23 #include "qemu/osdep.h"
24 #include "qemu/main-loop.h"
25 #include "hw/irq.h"
26 #include "hw/mips/cpudevs.h"
27 #include "sysemu/kvm.h"
28 #include "kvm_mips.h"
29
30 static void cpu_mips_irq_request(void *opaque, int irq, int level)
31 {
32 MIPSCPU *cpu = opaque;
33 CPUMIPSState *env = &cpu->env;
34 CPUState *cs = CPU(cpu);
35 bool locked = false;
36
37 if (irq < 0 || irq > 7) {
38 return;
39 }
40
41 /* Make sure locking works even if BQL is already held by the caller */
42 if (!qemu_mutex_iothread_locked()) {
43 locked = true;
44 qemu_mutex_lock_iothread();
45 }
46
47 if (level) {
48 env->CP0_Cause |= 1 << (irq + CP0Ca_IP);
49 } else {
50 env->CP0_Cause &= ~(1 << (irq + CP0Ca_IP));
51 }
52
53 if (kvm_enabled() && (irq == 2 || irq == 3)) {
54 kvm_mips_set_interrupt(cpu, irq, level);
55 }
56
57 if (env->CP0_Cause & CP0Ca_IP_mask) {
58 cpu_interrupt(cs, CPU_INTERRUPT_HARD);
59 } else {
60 cpu_reset_interrupt(cs, CPU_INTERRUPT_HARD);
61 }
62
63 if (locked) {
64 qemu_mutex_unlock_iothread();
65 }
66 }
67
68 void cpu_mips_irq_init_cpu(MIPSCPU *cpu)
69 {
70 CPUMIPSState *env = &cpu->env;
71 qemu_irq *qi;
72 int i;
73
74 qi = qemu_allocate_irqs(cpu_mips_irq_request, cpu, 8);
75 for (i = 0; i < 8; i++) {
76 env->irq[i] = qi[i];
77 }
78 g_free(qi);
79 }
80
81 void cpu_mips_soft_irq(CPUMIPSState *env, int irq, int level)
82 {
83 if (irq < 0 || irq > 2) {
84 return;
85 }
86
87 qemu_set_irq(env->irq[irq], level);
88 }