TXPFC_PF_EN
ecmd->tx_pause = (jme->reg_txpfc & TXPFC_PF_EN) != 0;
if (((jme->reg_txpfc & TXPFC_PF_EN) != 0) ^
jme->reg_txpfc |= TXPFC_PF_EN;
jme->reg_txpfc &= ~TXPFC_PF_EN;