2 * QEMU IRQ/GPIO common code.
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24 #include "qemu-common.h"
28 qemu_irq_handler handler;
33 void qemu_set_irq(qemu_irq irq, int level)
38 irq->handler(irq->opaque, irq->n, level);
41 qemu_irq *qemu_extend_irqs(qemu_irq *old, int n_old, qemu_irq_handler handler,
50 s = old ? g_renew(qemu_irq, old, n + n_old) : g_new(qemu_irq, n);
51 for (i = n_old; i < n + n_old; i++) {
52 s[i] = qemu_allocate_irq(handler, opaque, i);
57 qemu_irq *qemu_allocate_irqs(qemu_irq_handler handler, void *opaque, int n)
59 return qemu_extend_irqs(NULL, 0, handler, opaque, n);
62 qemu_irq qemu_allocate_irq(qemu_irq_handler handler, void *opaque, int n)
66 irq = g_new(struct IRQState, 1);
67 irq->handler = handler;
74 void qemu_free_irqs(qemu_irq *s, int n)
77 for (i = 0; i < n; i++) {
83 void qemu_free_irq(qemu_irq irq)
88 static void qemu_notirq(void *opaque, int line, int level)
90 struct IRQState *irq = opaque;
92 irq->handler(irq->opaque, irq->n, !level);
95 qemu_irq qemu_irq_invert(qemu_irq irq)
97 /* The default state for IRQs is low, so raise the output now. */
99 return qemu_allocate_irq(qemu_notirq, irq, 0);
102 static void qemu_splitirq(void *opaque, int line, int level)
104 struct IRQState **irq = opaque;
105 irq[0]->handler(irq[0]->opaque, irq[0]->n, level);
106 irq[1]->handler(irq[1]->opaque, irq[1]->n, level);
109 qemu_irq qemu_irq_split(qemu_irq irq1, qemu_irq irq2)
111 qemu_irq *s = g_malloc0(2 * sizeof(qemu_irq));
114 return qemu_allocate_irq(qemu_splitirq, s, 0);
117 static void proxy_irq_handler(void *opaque, int n, int level)
119 qemu_irq **target = opaque;
122 qemu_set_irq((*target)[n], level);
126 qemu_irq *qemu_irq_proxy(qemu_irq **target, int n)
128 return qemu_allocate_irqs(proxy_irq_handler, target, n);
131 void qemu_irq_intercept_in(qemu_irq *gpio_in, qemu_irq_handler handler, int n)
134 qemu_irq *old_irqs = qemu_allocate_irqs(NULL, NULL, n);
135 for (i = 0; i < n; i++) {
136 *old_irqs[i] = *gpio_in[i];
137 gpio_in[i]->handler = handler;
138 gpio_in[i]->opaque = old_irqs;
142 void qemu_irq_intercept_out(qemu_irq **gpio_out, qemu_irq_handler handler, int n)
144 qemu_irq *old_irqs = *gpio_out;
145 *gpio_out = qemu_allocate_irqs(handler, old_irqs, n);