Porting u boot for a Qualcomm IPQ4019 based router.

Hi, I want to port u boot for a custom-made Qualcomm IPQ4019 based router, I've finished the dts part but had problems with these files:

board/<myboard>.c include/configs/<myboard>.h

Since there is no similar board to take reference, I have absolutely no idea what code should I write to these files. I've read some of these files for other boards, it seems contains code that is very device specific and that leaves me even more confused because I don't know what words; functions; definitions my device uses. So, what should I do?

Thanks for your help.