INT4_GMAC1
sc->sc_int_select[4] = INT4_GMAC1;
bus_space_write_4(sc->sc_iot, sc->sc_ioh, GMAC_INT4_SELECT, INT4_GMAC1);
sc->sc_int_mask[4] = (sc->sc_port1 ? INT4_GMAC1 : INT4_GMAC0);