MPU401_NPORT
bus_space_unmap(iot, ioh, MPU401_NPORT);
ia->ia_iosize = MPU401_NPORT;
if (bus_space_map (ia->ia_iot, ia->ia_iobase, MPU401_NPORT,
if (bus_space_map(iot, iobase, MPU401_NPORT, 0, &ioh)) {