GDT_MPR_EDOOR
bus_space_write_1(dpmemt, dpmemh, GDT_MPR_EDOOR, 0xff);
GDT_MPR_EDOOR, 0xff);
return bus_space_read_1(sc->sc_dpmemt, sc->sc_dpmemh, GDT_MPR_EDOOR);
bus_space_write_1(sc->sc_dpmemt, sc->sc_dpmemh, GDT_MPR_EDOOR, 0xff);