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