1 files changed, 65 insertions, 0 deletions
diff --git a/qemu/include/hw/irq.h b/qemu/include/hw/irq.h
new file mode 100644
index 000000000..4c4c2eaf9
--- /dev/null
+++ b/qemu/include/hw/irq.h
@@ -0,0 +1,65 @@
+#ifndef QEMU_IRQ_H
+#define QEMU_IRQ_H
+
+/* Generic IRQ/GPIO pin infrastructure.  */
+
+#define TYPE_IRQ "irq"
+
+typedef struct IRQState *qemu_irq;
+
+typedef void (*qemu_irq_handler)(void *opaque, int n, int level);
+
+void qemu_set_irq(qemu_irq irq, int level);
+
+static inline void qemu_irq_raise(qemu_irq irq)
+{
+    qemu_set_irq(irq, 1);
+}
+
+static inline void qemu_irq_lower(qemu_irq irq)
+{
+    qemu_set_irq(irq, 0);
+}
+
+static inline void qemu_irq_pulse(qemu_irq irq)
+{
+    qemu_set_irq(irq, 1);
+    qemu_set_irq(irq, 0);
+}
+
+/* Returns an array of N IRQs. Each IRQ is assigned the argument handler and
+ * opaque data.
+ */
+qemu_irq *qemu_allocate_irqs(qemu_irq_handler handler, void *opaque, int n);
+
+/*
+ * Allocates a single IRQ. The irq is assigned with a handler, an opaque
+ * data and the interrupt number.
+ */
+qemu_irq qemu_allocate_irq(qemu_irq_handler handler, void *opaque, int n);
+
+/* Extends an Array of IRQs. Old IRQs have their handlers and opaque data
+ * preserved. New IRQs are assigned the argument handler and opaque data.
+ */
+qemu_irq *qemu_extend_irqs(qemu_irq *old, int n_old, qemu_irq_handler handler,
+                                void *opaque, int n);
+
+void qemu_free_irqs(qemu_irq *s, int n);
+void qemu_free_irq(qemu_irq irq);
+
+/* Returns a new IRQ with opposite polarity.  */
+qemu_irq qemu_irq_invert(qemu_irq irq);
+
+/* Returns a new IRQ which feeds into both the passed IRQs */
+qemu_irq qemu_irq_split(qemu_irq irq1, qemu_irq irq2);
+
+/* Returns a new IRQ set which connects 1:1 to another IRQ set, which
+ * may be set later.
+ */
+qemu_irq *qemu_irq_proxy(qemu_irq **target, int n);
+
+/* For internal use in qtest.  Similar to qemu_irq_split, but operating
+   on an existing vector of qemu_irq.  */
+void qemu_irq_intercept_in(qemu_irq *gpio_in, qemu_irq_handler handler, int n);
+
+#endif