ET_MAC_CFG1
CSR_WRITE_4(sc, ET_MAC_CFG1,
CSR_WRITE_4(sc, ET_MAC_CFG1, 0);
CSR_WRITE_4(sc, ET_MAC_CFG1,
CSR_WRITE_4(sc, ET_MAC_CFG1, 0);
val = CSR_READ_4(sc, ET_MAC_CFG1);
CSR_WRITE_4(sc, ET_MAC_CFG1, val);
val = CSR_READ_4(sc, ET_MAC_CFG1);
CSR_WRITE_4(sc, ET_MAC_CFG1,
CSR_WRITE_4(sc, ET_MAC_CFG1,
CSR_WRITE_4(sc, ET_MAC_CFG1, 0);