How can I get the ethernet datasheet of the Unmatched board

I am developing the ethernet chip driver for the Unmatchec board.

In the existing manual, I did not see the description of the ethernet registers.

Is there a datasheet for the ethernet cadence macb chip of Unmatched?

Xilinx’s Zynq-7000 SoC Technical Reference Manual (UG585) Chapter 16 documents the same part as is used on the HiFive Unmatched

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Thank you very much for your help !
Found the datasheet for ethernet: