hw/irq.h

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