include/hw/irq.h

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