SCOOP_GPCR
rv = bus_space_read_2(sc->sc_iot, sc->sc_ioh, SCOOP_GPCR);
bus_space_write_2(sc->sc_iot, sc->sc_ioh, SCOOP_GPCR, rv);
gpcr = ioreg16_read(baseaddr + SCOOP_GPCR);