pcie_aer: support configurable AER capa version
[qemu.git] / hw / core / irq.c
1 /*
2 * QEMU IRQ/GPIO common code.
3 *
4 * Copyright (c) 2007 CodeSourcery.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22 * THE SOFTWARE.
23 */
24 #include "qemu/osdep.h"
25 #include "qemu-common.h"
26 #include "hw/irq.h"
27 #include "qom/object.h"
28
29 #define IRQ(obj) OBJECT_CHECK(struct IRQState, (obj), TYPE_IRQ)
30
31 struct IRQState {
32 Object parent_obj;
33
34 qemu_irq_handler handler;
35 void *opaque;
36 int n;
37 };
38
39 void qemu_set_irq(qemu_irq irq, int level)
40 {
41 if (!irq)
42 return;
43
44 irq->handler(irq->opaque, irq->n, level);
45 }
46
47 qemu_irq *qemu_extend_irqs(qemu_irq *old, int n_old, qemu_irq_handler handler,
48 void *opaque, int n)
49 {
50 qemu_irq *s;
51 int i;
52
53 if (!old) {
54 n_old = 0;
55 }
56 s = old ? g_renew(qemu_irq, old, n + n_old) : g_new(qemu_irq, n);
57 for (i = n_old; i < n + n_old; i++) {
58 s[i] = qemu_allocate_irq(handler, opaque, i);
59 }
60 return s;
61 }
62
63 qemu_irq *qemu_allocate_irqs(qemu_irq_handler handler, void *opaque, int n)
64 {
65 return qemu_extend_irqs(NULL, 0, handler, opaque, n);
66 }
67
68 qemu_irq qemu_allocate_irq(qemu_irq_handler handler, void *opaque, int n)
69 {
70 struct IRQState *irq;
71
72 irq = IRQ(object_new(TYPE_IRQ));
73 irq->handler = handler;
74 irq->opaque = opaque;
75 irq->n = n;
76
77 return irq;
78 }
79
80 void qemu_free_irqs(qemu_irq *s, int n)
81 {
82 int i;
83 for (i = 0; i < n; i++) {
84 qemu_free_irq(s[i]);
85 }
86 g_free(s);
87 }
88
89 void qemu_free_irq(qemu_irq irq)
90 {
91 object_unref(OBJECT(irq));
92 }
93
94 static void qemu_notirq(void *opaque, int line, int level)
95 {
96 struct IRQState *irq = opaque;
97
98 irq->handler(irq->opaque, irq->n, !level);
99 }
100
101 qemu_irq qemu_irq_invert(qemu_irq irq)
102 {
103 /* The default state for IRQs is low, so raise the output now. */
104 qemu_irq_raise(irq);
105 return qemu_allocate_irq(qemu_notirq, irq, 0);
106 }
107
108 static void qemu_splitirq(void *opaque, int line, int level)
109 {
110 struct IRQState **irq = opaque;
111 irq[0]->handler(irq[0]->opaque, irq[0]->n, level);
112 irq[1]->handler(irq[1]->opaque, irq[1]->n, level);
113 }
114
115 qemu_irq qemu_irq_split(qemu_irq irq1, qemu_irq irq2)
116 {
117 qemu_irq *s = g_malloc0(2 * sizeof(qemu_irq));
118 s[0] = irq1;
119 s[1] = irq2;
120 return qemu_allocate_irq(qemu_splitirq, s, 0);
121 }
122
123 static void proxy_irq_handler(void *opaque, int n, int level)
124 {
125 qemu_irq **target = opaque;
126
127 if (*target) {
128 qemu_set_irq((*target)[n], level);
129 }
130 }
131
132 qemu_irq *qemu_irq_proxy(qemu_irq **target, int n)
133 {
134 return qemu_allocate_irqs(proxy_irq_handler, target, n);
135 }
136
137 void qemu_irq_intercept_in(qemu_irq *gpio_in, qemu_irq_handler handler, int n)
138 {
139 int i;
140 qemu_irq *old_irqs = qemu_allocate_irqs(NULL, NULL, n);
141 for (i = 0; i < n; i++) {
142 *old_irqs[i] = *gpio_in[i];
143 gpio_in[i]->handler = handler;
144 gpio_in[i]->opaque = &old_irqs[i];
145 }
146 }
147
148 static const TypeInfo irq_type_info = {
149 .name = TYPE_IRQ,
150 .parent = TYPE_OBJECT,
151 .instance_size = sizeof(struct IRQState),
152 };
153
154 static void irq_register_types(void)
155 {
156 type_register_static(&irq_type_info);
157 }
158
159 type_init(irq_register_types)