hw/irq.h

   1 #ifndef QEMU_IRQ_H
   2 #define QEMU_IRQ_H
   3
   4 /* Generic IRQ/GPIO pin infrastructure.  */
   5
   6 typedef void (*qemu_irq_handler)(void *opaque, int n, int level);
   7
   8 void qemu_set_irq(qemu_irq irq, int level);
   9
  10 static inline void qemu_irq_raise(qemu_irq irq)
  11 {
  12     qemu_set_irq(irq, 1);
  13 }
  14
  15 static inline void qemu_irq_lower(qemu_irq irq)
  16 {
  17     qemu_set_irq(irq, 0);
  18 }
  19
  20 static inline void qemu_irq_pulse(qemu_irq irq)
  21 {
  22     qemu_set_irq(irq, 1);
  23     qemu_set_irq(irq, 0);
  24 }
  25
  26 /* Returns an array of N IRQs.  */
  27 qemu_irq *qemu_allocate_irqs(qemu_irq_handler handler, void *opaque, int n);
  28 void qemu_free_irqs(qemu_irq *s);
  29
  30 /* Returns a new IRQ with opposite polarity.  */
  31 qemu_irq qemu_irq_invert(qemu_irq irq);
  32
  33 /* Returns a new IRQ which feeds into both the passed IRQs */
  34 qemu_irq qemu_irq_split(qemu_irq irq1, qemu_irq irq2);
  35
  36 /* Returns a new IRQ set which connects 1:1 to another IRQ set, which
  37  * may be set later.
  38  */
  39 qemu_irq *qemu_irq_proxy(qemu_irq **target, int n);
  40
  41 #endif