sm501: Add missing arbitration control register
[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/main-loop.h"
26 #include "qemu-common.h"
27 #include "hw/irq.h"
28 #include "qom/object.h"
29
30 #define IRQ(obj) OBJECT_CHECK(struct IRQState, (obj), TYPE_IRQ)
31
32 struct IRQState {
33 Object parent_obj;
34
35 qemu_irq_handler handler;
36 void *opaque;
37 int n;
38 };
39
40 void qemu_set_irq(qemu_irq irq, int level)
41 {
42 if (!irq)
43 return;
44
45 irq->handler(irq->opaque, irq->n, level);
46 }
47
48 qemu_irq *qemu_extend_irqs(qemu_irq *old, int n_old, qemu_irq_handler handler,
49 void *opaque, int n)
50 {
51 qemu_irq *s;
52 int i;
53
54 if (!old) {
55 n_old = 0;
56 }
57 s = old ? g_renew(qemu_irq, old, n + n_old) : g_new(qemu_irq, n);
58 for (i = n_old; i < n + n_old; i++) {
59 s[i] = qemu_allocate_irq(handler, opaque, i);
60 }
61 return s;
62 }
63
64 qemu_irq *qemu_allocate_irqs(qemu_irq_handler handler, void *opaque, int n)
65 {
66 return qemu_extend_irqs(NULL, 0, handler, opaque, n);
67 }
68
69 qemu_irq qemu_allocate_irq(qemu_irq_handler handler, void *opaque, int n)
70 {
71 struct IRQState *irq;
72
73 irq = IRQ(object_new(TYPE_IRQ));
74 irq->handler = handler;
75 irq->opaque = opaque;
76 irq->n = n;
77
78 return irq;
79 }
80
81 void qemu_free_irqs(qemu_irq *s, int n)
82 {
83 int i;
84 for (i = 0; i < n; i++) {
85 qemu_free_irq(s[i]);
86 }
87 g_free(s);
88 }
89
90 void qemu_free_irq(qemu_irq irq)
91 {
92 object_unref(OBJECT(irq));
93 }
94
95 static void qemu_notirq(void *opaque, int line, int level)
96 {
97 struct IRQState *irq = opaque;
98
99 irq->handler(irq->opaque, irq->n, !level);
100 }
101
102 qemu_irq qemu_irq_invert(qemu_irq irq)
103 {
104 /* The default state for IRQs is low, so raise the output now. */
105 qemu_irq_raise(irq);
106 return qemu_allocate_irq(qemu_notirq, irq, 0);
107 }
108
109 static void qemu_splitirq(void *opaque, int line, int level)
110 {
111 struct IRQState **irq = opaque;
112 irq[0]->handler(irq[0]->opaque, irq[0]->n, level);
113 irq[1]->handler(irq[1]->opaque, irq[1]->n, level);
114 }
115
116 qemu_irq qemu_irq_split(qemu_irq irq1, qemu_irq irq2)
117 {
118 qemu_irq *s = g_malloc0(2 * sizeof(qemu_irq));
119 s[0] = irq1;
120 s[1] = irq2;
121 return qemu_allocate_irq(qemu_splitirq, s, 0);
122 }
123
124 static void proxy_irq_handler(void *opaque, int n, int level)
125 {
126 qemu_irq **target = opaque;
127
128 if (*target) {
129 qemu_set_irq((*target)[n], level);
130 }
131 }
132
133 qemu_irq *qemu_irq_proxy(qemu_irq **target, int n)
134 {
135 return qemu_allocate_irqs(proxy_irq_handler, target, n);
136 }
137
138 void qemu_irq_intercept_in(qemu_irq *gpio_in, qemu_irq_handler handler, int n)
139 {
140 int i;
141 qemu_irq *old_irqs = qemu_allocate_irqs(NULL, NULL, n);
142 for (i = 0; i < n; i++) {
143 *old_irqs[i] = *gpio_in[i];
144 gpio_in[i]->handler = handler;
145 gpio_in[i]->opaque = &old_irqs[i];
146 }
147 }
148
149 static const TypeInfo irq_type_info = {
150 .name = TYPE_IRQ,
151 .parent = TYPE_OBJECT,
152 .instance_size = sizeof(struct IRQState),
153 };
154
155 static void irq_register_types(void)
156 {
157 type_register_static(&irq_type_info);
158 }
159
160 type_init(irq_register_types)