mirror of
https://github.com/xemu-project/xemu.git
synced 2024-11-24 20:19:44 +00:00
22ec3283ef
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>
42 lines
969 B
C
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
|