IMX_UCR1
bus_space_write_4(iot, ioh, IMX_UCR1, sc->sc_ucr1);
bus_space_write_region_4(iot, ioh, IMX_UCR1, sc->sc_ucr, 4);
bus_space_write_region_4(iot, ioh, IMX_UCR1, sc->sc_ucr, 2);
bus_space_write_4(iot, ioh, IMX_UCR1, ucr1);
bus_space_write_4(regsp->ur_iot, regsp->ur_ioh, IMX_UCR1,
bus_space_write_4(iot, ioh, IMX_UCR1, sc->sc_ucr1);
bus_space_read_region_4(iot, ioh, IMX_UCR1, sc->sc_ucr, 4);
reg = bus_space_read_4(iot, ioh, IMX_UCR1);
bus_space_write_4(iot, ioh, IMX_UCR1, reg);
#define IMX_UCRn(n) (IMX_UCR1 + ((n) << 2))