I have similar problem as you. We have FMC230 and FMC126, which is DAC and ADC respectively.
I think it is difficult to directly bring up DAC and ADC boards without the reference designs of 4DSP. So I reuse and modify some code, and use ROM to collect the initial command form the Ethernet. It finally works.
If you want to know more, e-mail me (firstname.lastname@example.org), and we can have more discussions.