Function intr_pic_register

freebsd/kern/subr_intr.c:811–825

* Register interrupt controller. */

 *  Register interrupt controller.
 */
struct intr_pic *
intr_pic_register(device_t dev, intptr_t xref)
{
	struct intr_pic *pic;

	if (dev == NULL)
		return (NULL);
	pic = pic_create(dev, xref, FLAG_PIC);
	if (pic == NULL)
		return (NULL);

	debugf("PIC %p registered for %s <dev %p, xref %jx>\n", pic,
	    device_get_nameunit(dev), dev, (uintmax_t)xref);
	return (pic);
}

/*
 *  Unregister interrupt controller.