cpu_intr_establish
if ((iv = cpu_intr_establish(pri, irq, apic_intr, aiv, NULL))) {
cpu_intr_establish(IPL_CLOCK, 31, itmr_intr, NULL, "clock");
cpu_intr_establish(IPL_IPI, 30, hppa_ipi_intr, NULL, "ipi");
sc->sc_ih = cpu_intr_establish(IPL_NESTED, irqbit,
sc->sc_ih = cpu_intr_establish(IPL_HIGH, ca->ca_irq,
sc->sc_ih = cpu_intr_establish(IPL_CLOCK, ca->ca_irq,
cpu_intr_establish(IPL_BIO, ca->ca_irq, siop_intr, sc,
sc->sc_ih = cpu_intr_establish(IPL_NESTED, irqbit,
void *cpu_intr_establish(int pri, int irq, int (*handler)(void *),