SGE_ADDR_LO
desc->sge_ptr = htole32(SGE_ADDR_LO(segs[0].ds_addr));
desc->sge_ptr = htole32(SGE_ADDR_LO(txsegs[i].ds_addr));
CSR_WRITE_4(sc, TX_DESC, SGE_ADDR_LO(sc->sge_ldata.sge_tx_paddr));
CSR_WRITE_4(sc, RX_DESC, SGE_ADDR_LO(sc->sge_ldata.sge_rx_paddr));