MACSTNADDR2
| ((uint64_t)le32toh(cpu_read_4(ETSEC1_BASE + MACSTNADDR2)) << 48);
sc->sc_macstnaddr2 = etsec_read(sc, MACSTNADDR2);
etsec_write(sc, MACSTNADDR2, (uint32_t)(macstnaddr >> 0));