mirror of
https://github.com/qemu/qemu.git
synced 2024-11-30 15:23:34 +08:00
9793212bb0
Add a qemu_irq_split() function which allows a board to wire a single GPIO output up to two GPIO inputs. This is needed for realview boards, where the MMC card status is visible both in a system register and via a PL061 GPIO module. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
37 lines
821 B
C
37 lines
821 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);
|
|
|
|
#endif
|