LXR qemu/include/hw/irq.h

   1#ifndef QEMU_IRQ_H
   2#define QEMU_IRQ_H
   3
   4#include "qom/object.h"
   5
   6/* Generic IRQ/GPIO pin infrastructure.  */
   7
   8#define TYPE_IRQ "irq"
   9
  10typedef struct IRQState *qemu_irq;
  11
  12typedef void (*qemu_irq_handler)(void *opaque, int n, int level);
  13
  14struct IRQState {
  15    Object parent_obj;
  16
  17    qemu_irq_handler handler;
  18    void *opaque;
  19    int n;
  20};
  21
  22void qemu_set_irq(qemu_irq irq, int level);
  23
  24static inline void qemu_irq_raise(qemu_irq irq)
  25{
  26    qemu_set_irq(irq, 1);
  27}
  28
  29static inline void qemu_irq_lower(qemu_irq irq)
  30{
  31    qemu_set_irq(irq, 0);
  32}
  33
  34static inline void qemu_irq_pulse(qemu_irq irq)
  35{
  36    qemu_set_irq(irq, 1);
  37    qemu_set_irq(irq, 0);
  38}
  39
  40/* Returns an array of N IRQs. Each IRQ is assigned the argument handler and
  41 * opaque data.
  42 */
  43qemu_irq *qemu_allocate_irqs(qemu_irq_handler handler, void *opaque, int n);
  44
  45/*
  46 * Allocates a single IRQ. The irq is assigned with a handler, an opaque
  47 * data and the interrupt number.
  48 */
  49qemu_irq qemu_allocate_irq(qemu_irq_handler handler, void *opaque, int n);
  50
  51/* Extends an Array of IRQs. Old IRQs have their handlers and opaque data
  52 * preserved. New IRQs are assigned the argument handler and opaque data.
  53 */
  54qemu_irq *qemu_extend_irqs(qemu_irq *old, int n_old, qemu_irq_handler handler,
  55                                void *opaque, int n);
  56
  57void qemu_free_irqs(qemu_irq *s, int n);
  58void qemu_free_irq(qemu_irq irq);
  59
  60/* Returns a new IRQ with opposite polarity.  */
  61qemu_irq qemu_irq_invert(qemu_irq irq);
  62
  63/* Returns a new IRQ which feeds into both the passed IRQs */
  64qemu_irq qemu_irq_split(qemu_irq irq1, qemu_irq irq2);
  65
  66/* Returns a new IRQ set which connects 1:1 to another IRQ set, which
  67 * may be set later.
  68 */
  69qemu_irq *qemu_irq_proxy(qemu_irq **target, int n);
  70
  71/* For internal use in qtest.  Similar to qemu_irq_split, but operating
  72   on an existing vector of qemu_irq.  */
  73void qemu_irq_intercept_in(qemu_irq *gpio_in, qemu_irq_handler handler, int n);
  74
  75#endif
  76