qemu/hw/irq.h
Avi Kivity 22ec3283ef irq: introduce qemu_irq_proxy()
In some cases we have a circular dependency involving irqs - the irq
controller depends on a bus, which in turn depends on the irq controller.
Add qemu_irq_proxy() which acts as a passthrough, except that the target
irq may be set later on.

Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2011-09-23 11:51:05 -05:00

42 lines
969 B
C

#ifndef QEMU_IRQ_H
#define QEMU_IRQ_H
/* Generic IRQ/GPIO pin infrastructure. */
typedef void (*qemu_irq_handler)(void *opaque, int n, int level);
void qemu_set_irq(qemu_irq irq, int level);
static inline void qemu_irq_raise(qemu_irq irq)
{
qemu_set_irq(irq, 1);
}
static inline void qemu_irq_lower(qemu_irq irq)
{
qemu_set_irq(irq, 0);
}
static inline void qemu_irq_pulse(qemu_irq irq)
{
qemu_set_irq(irq, 1);
qemu_set_irq(irq, 0);
}
/* Returns an array of N IRQs. */
qemu_irq *qemu_allocate_irqs(qemu_irq_handler handler, void *opaque, int n);
void qemu_free_irqs(qemu_irq *s);
/* Returns a new IRQ with opposite polarity. */
qemu_irq qemu_irq_invert(qemu_irq irq);
/* Returns a new IRQ which feeds into both the passed IRQs */
qemu_irq qemu_irq_split(qemu_irq irq1, qemu_irq irq2);
/* Returns a new IRQ set which connects 1:1 to another IRQ set, which
* may be set later.
*/
qemu_irq *qemu_irq_proxy(qemu_irq **target, int n);
#endif