CPSW_ALE_CONTROL
reg = cpsw_read_4(sc->swsc, CPSW_ALE_CONTROL);
cpsw_write_4(sc->swsc, CPSW_ALE_CONTROL, reg);
cpsw_write_4(sc, CPSW_ALE_CONTROL, CPSW_ALE_CTL_CLEAR_TBL);
cpsw_write_4(sc, CPSW_ALE_CONTROL, reg);