1 files changed, 15 insertions, 1 deletions
diff --git a/hw/irq.c b/hw/irq.c
index e46ee603c..eca707dd0 100644
--- a/hw/irq.c
+++ b/hw/irq.c
@@ -21,7 +21,8 @@
  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  * THE SOFTWARE.
  */
-#include "vl.h"
+#include "qemu-common.h"
+#include "irq.h"
 
 struct IRQState {
     qemu_irq_handler handler;
@@ -55,3 +56,16 @@ qemu_irq *qemu_allocate_irqs(qemu_irq_handler handler, void *opaque, int n)
     return s;
 }
 
+static void qemu_notirq(void *opaque, int line, int level)
+{
+    struct IRQState *irq = opaque;
+
+    irq->handler(irq->opaque, irq->n, !level);
+}
+
+qemu_irq qemu_irq_invert(qemu_irq irq)
+{
+    /* The default state for IRQs is low, so raise the output now.  */
+    qemu_irq_raise(irq);
+    return qemu_allocate_irqs(qemu_notirq, irq, 1)[0];
+}