SIP_CFG
val = CSR_READ(l, SIP_CFG);
(bus_space_read_4(sc->sc_st, sc->sc_sh, SIP_CFG) &
bus_space_write_4(st, sh, SIP_CFG, sc->sc_cfg);
bus_space_write_4(sc->sc_st, sc->sc_sh, SIP_CFG, cfg);
reg = bus_space_read_4(sc->sc_st, sc->sc_sh, SIP_CFG);