DM_TCRR
bus_space_write_4(sc->sc_iot, ioh, DM_TCRR, 0);
oclock = bus_space_read_4(sc->sc_iot, sc->sc_ioh[1], DM_TCRR);
clock = bus_space_read_4(sc->sc_iot, sc->sc_ioh[1], DM_TCRR);
return bus_space_read_4(sc->sc_iot, sc->sc_ioh[1], DM_TCRR);
bus_space_write_4(sc->sc_iot, sc->sc_ioh[0], DM_TCRR,
bus_space_write_4(sc->sc_iot, sc->sc_ioh[0], DM_TCRR, UINT32_MAX);