MAC_CFG_TX_ENB
if ((reg & (MAC_CFG_TX_ENB | MAC_CFG_RX_ENB)) != 0) {
reg &= ~(MAC_CFG_TX_ENB | MAC_CFG_RX_ENB);
reg |= MAC_CFG_TX_ENB | MAC_CFG_RX_ENB;
if ((reg & (MAC_CFG_TX_ENB | MAC_CFG_RX_ENB)) != 0) {
reg &= ~(MAC_CFG_TX_ENB | MAC_CFG_RX_ENB);
reg |= MAC_CFG_TX_ENB | MAC_CFG_RX_ENB;
reg |= MAC_CFG_TX_ENB | MAC_CFG_RX_ENB;
CSR_WRITE_4(sc, AGE_MAC_CFG, reg | MAC_CFG_TX_ENB | MAC_CFG_RX_ENB);
if ((reg & MAC_CFG_TX_ENB) != 0) {
reg &= ~MAC_CFG_TX_ENB;