65 lines
1.8 KiB
C
65 lines
1.8 KiB
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 struct IRQState *qemu_irq;
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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. Each IRQ is assigned the argument handler and
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* opaque data.
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*/
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qemu_irq *qemu_allocate_irqs(qemu_irq_handler handler, void *opaque, int n);
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/*
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* Allocates a single IRQ. The irq is assigned with a handler, an opaque
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* data and the interrupt number.
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*/
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qemu_irq qemu_allocate_irq(qemu_irq_handler handler, void *opaque, int n);
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/* Extends an Array of IRQs. Old IRQs have their handlers and opaque data
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* preserved. New IRQs are assigned the argument handler and opaque data.
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*/
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qemu_irq *qemu_extend_irqs(qemu_irq *old, int n_old, qemu_irq_handler handler,
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void *opaque, int n);
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void qemu_free_irqs(qemu_irq *s);
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void qemu_free_irq(qemu_irq irq);
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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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/* Returns a new IRQ set which connects 1:1 to another IRQ set, which
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* may be set later.
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*/
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qemu_irq *qemu_irq_proxy(qemu_irq **target, int n);
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/* For internal use in qtest. Similar to qemu_irq_split, but operating
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on an existing vector of qemu_irq. */
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void qemu_irq_intercept_in(qemu_irq *gpio_in, qemu_irq_handler handler, int n);
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void qemu_irq_intercept_out(qemu_irq **gpio_out, qemu_irq_handler handler, int n);
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#endif
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