GMAC_INT4_STATUS
bus_space_write_4(sc->sc_iot, sc->sc_ioh, GMAC_INT4_STATUS, ~0);
bus_space_read_4(sc->sc_iot, sc->sc_ioh, GMAC_INT4_STATUS));
GMAC_INT4_STATUS);
bus_space_write_4(sc->sc_iot, sc->sc_ioh, GMAC_INT4_STATUS,
bus_space_write_4(sc->sc_iot, sc->sc_ioh, GMAC_INT4_STATUS, status);
bus_space_read_4(sc->sc_iot, sc->sc_ioh, GMAC_INT4_STATUS));