Function bcm_mips_attach

freebsd/mips/broadcom/bcm_mips.c:299–393

* BHND MIPS device attach. * * This must be called from subclass drivers' DEVICE_ATTACH(). * * @param dev BHND MIPS device. * @param num_cpuirqs The number of usable MIPS HW IRQs. * @param timer_irq The MIPS HW IRQ assigned to the MIPS CPU timer. * @param filter The subclass's core-specific IRQ dispatch filter. Will be * passed the associated bcm_mips_cpuirq instance as its argument. */

 * passed the associated bcm_mips_cpuirq instance as its argument.
 */
int
bcm_mips_attach(device_t dev, u_int num_cpuirqs, u_int timer_irq,
    driver_filter_t filter)
{
	struct bcm_mips_softc	*sc;
	struct intr_pic		*pic;
	uintptr_t		 xref;
	u_int			 irq_rid;
	rman_res_t		 irq;
	int			 error;

	sc = device_get_softc(dev);
	sc->dev = dev;
	sc->num_cpuirqs = num_cpuirqs;
	sc->timer_irq = timer_irq;

	/* Must not exceed the actual size of our fixed IRQ array */
	if (sc->num_cpuirqs > nitems(sc->cpuirqs)) {
		device_printf(dev, "%u nirqs exceeds maximum supported %zu",
		    sc->num_cpuirqs, nitems(sc->cpuirqs));
		return (ENXIO);
	}

	pic = NULL;
	xref = bcm_mips_pic_xref(sc);

	BCM_MIPS_LOCK_INIT(sc);

	/* Register our interrupt sources */
	if ((error = bcm_mips_register_isrcs(sc))) {
		BCM_MIPS_LOCK_DESTROY(sc);
		return (error);
	}

	/* Initialize our CPU interrupt state */
	irq_rid = bhnd_get_intr_count(dev); /* last bhnd-assigned RID + 1 */
	irq = 0;
	for (u_int i = 0; i < sc->num_cpuirqs; i++) {
		/* Must not overflow signed resource ID representation */
		if (irq_rid >= INT_MAX) {
			device_printf(dev, "exhausted IRQ resource IDs\n");
			error = ENOMEM;
			goto failed;
		}

		if (irq == sc->timer_irq) {
			/* Mark the CPU timer's IRQ as unavailable */
			error = bcm_mips_init_cpuirq_unavail(sc,
			    &sc->cpuirqs[i]);
		} else {
			/* Initialize state */
			error = bcm_mips_init_cpuirq(sc, &sc->cpuirqs[i],
			    irq_rid, irq, filter);
		}

		if (error)
			goto failed;