ALC_MAC_CFG
reg = CSR_READ_4(sc, ALC_MAC_CFG);
CSR_WRITE_4(sc, ALC_MAC_CFG, reg);
mac = CSR_READ_4(sc, ALC_MAC_CFG);
mac = CSR_READ_4(sc, ALC_MAC_CFG);
CSR_WRITE_4(sc, ALC_MAC_CFG, mac);
reg = CSR_READ_4(sc, ALC_MAC_CFG);
CSR_WRITE_4(sc, ALC_MAC_CFG, reg);
CSR_WRITE_4(sc, ALC_MAC_CFG, reg);
reg = CSR_READ_4(sc, ALC_MAC_CFG);
CSR_WRITE_4(sc, ALC_MAC_CFG, reg);
reg = CSR_READ_4(sc, ALC_MAC_CFG);
CSR_WRITE_4(sc, ALC_MAC_CFG, reg);
reg = CSR_READ_4(sc, ALC_MAC_CFG);
CSR_WRITE_4(sc, ALC_MAC_CFG, reg);
rxcfg = CSR_READ_4(sc, ALC_MAC_CFG);
CSR_WRITE_4(sc, ALC_MAC_CFG, rxcfg);