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hw/core: Add interface to allocate and free a single IRQ 

qemu_allocate_irq returns a single qemu_irq.
The interface allows to specify an interrupt number.

qemu_free_irq frees it.

Signed-off-by: Marcel Apfelbaum <marcel.a@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Marcel Apfelbaum 2013-10-07 10:36:34 +03:00 committed by Michael S. Tsirkin
parent a53ae8e934
commit a8a9d30bab
2 changed files with 23 additions and 0 deletions
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16
hw/core/irq.c
View File

@ -68,6 +68,17 @@ qemu_irq *qemu_allocate_irqs(qemu_irq_handler handler, void *opaque, int n)
return qemu_extend_irqs(NULL, 0, handler, opaque, n);
}
qemu_irq qemu_allocate_irq(qemu_irq_handler handler, void *opaque, int n)
{
struct IRQState *irq;
irq = g_new(struct IRQState, 1);
irq->handler = handler;
irq->opaque = opaque;
irq->n = n;
return irq;
}
void qemu_free_irqs(qemu_irq *s)
{
@ -75,6 +86,11 @@ void qemu_free_irqs(qemu_irq *s)
g_free(s);
}
void qemu_free_irq(qemu_irq irq)
{
g_free(irq);
}
static void qemu_notirq(void *opaque, int line, int level)
{
struct IRQState *irq = opaque;

7
include/hw/irq.h
View File

@ -30,6 +30,12 @@ static inline void qemu_irq_pulse(qemu_irq irq)
*/
qemu_irq *qemu_allocate_irqs(qemu_irq_handler handler, void *opaque, int n);
/*
* Allocates a single IRQ. The irq is assigned with a handler, an opaque
* data and the interrupt number.
*/
qemu_irq qemu_allocate_irq(qemu_irq_handler handler, void *opaque, int n);
/* Extends an Array of IRQs. Old IRQs have their handlers and opaque data
* preserved. New IRQs are assigned the argument handler and opaque data.
*/
@ -37,6 +43,7 @@ qemu_irq *qemu_extend_irqs(qemu_irq *old, int n_old, qemu_irq_handler handler,
void *opaque, int n);
void qemu_free_irqs(qemu_irq *s);
void qemu_free_irq(qemu_irq irq);
/* Returns a new IRQ with opposite polarity. */
qemu_irq qemu_irq_invert(qemu_irq irq);