osb4_iot
bus_space_write_1(ph->osb4_iot, ph->osb4_ioh, 0, link);
*irqp = bus_space_read_1(ph->osb4_iot, ph->osb4_ioh, 1) & 0xf;
bus_space_write_1(ph->osb4_iot, ph->osb4_ioh, 0, link);
bus_space_write_1(ph->osb4_iot, ph->osb4_ioh, 1, irq & 0xf);