MII_MV_SWITCH_GLOBAL_ADDR
MV_WRITE(sc, MII_MV_SWITCH_GLOBAL_ADDR, MV_ATU_CONTROL,
status = MV_READ(sc, MII_MV_SWITCH_GLOBAL_ADDR,
MV_WRITE(sc, MII_MV_SWITCH_GLOBAL_ADDR, MV_ATU_OPERATION,