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. Each IRQ is assigned the argument handler and
  27  * opaque data.
  28  */
  29 qemu_irq *qemu_allocate_irqs(qemu_irq_handler handler, void *opaque, int n);
  30
  31 /* Extends an Array of IRQs. Old IRQs have their handlers and opaque data
  32  * preserved. New IRQs are assigned the argument handler and opaque data.
  33  */
  34 qemu_irq *qemu_extend_irqs(qemu_irq *old, int n_old, qemu_irq_handler handler,
  35                                 void *opaque, int n);
  36
  37 void qemu_free_irqs(qemu_irq *s);
  38
  39 /* Returns a new IRQ with opposite polarity.  */
  40 qemu_irq qemu_irq_invert(qemu_irq irq);
  41
  42 /* Returns a new IRQ which feeds into both the passed IRQs */
  43 qemu_irq qemu_irq_split(qemu_irq irq1, qemu_irq irq2);
  44
  45 /* Returns a new IRQ set which connects 1:1 to another IRQ set, which
  46  * may be set later.
  47  */
  48 qemu_irq *qemu_irq_proxy(qemu_irq **target, int n);
  49
  50 /* For internal use in qtest.  Similar to qemu_irq_split, but operating
  51    on an existing vector of qemu_irq.  */
  52 void qemu_irq_intercept_in(qemu_irq *gpio_in, qemu_irq_handler handler, int n);
  53 void qemu_irq_intercept_out(qemu_irq **gpio_out, qemu_irq_handler handler, int n);
  54
  55 #endif