AVE_MAX_ETHFRAME
AVE_RXCR_FLOCTR | (AVE_MAX_ETHFRAME & AVE_RXCR_MPSIZ_MASK);
ndev->max_mtu = AVE_MAX_ETHFRAME - (ETH_HLEN + ETH_FCS_LEN);
skb = netdev_alloc_skb(ndev, AVE_MAX_ETHFRAME);
AVE_MAX_ETHFRAME + AVE_FRAME_HEADROOM,
AVE_STS_INTR | AVE_MAX_ETHFRAME);