xilinx 10GbE ipcore 主要有 axi4-stream data-path 和 axi4-lite control-path,这两口都是接在MAC上,pcs/pma和mac通过xgmii接口和mdio接口连接。
pcs/pma有两种,10GBASE-R or 10GBASE-KR。ieee1588v2只支持10GBASE-R。10GBASE-KR多支持了FEC(Forward Error Correction),AN(Auto-Negotiation),TRAIN(Link Training).
所以10GBASE-R后直接光口,10GBASE-KR还可以接backplane。
+----------+-----------------------------------+------------------------------------------+
|data link | mac control flow control |
| | mac frame check |
|