HELP !! Reconfigured EPCQ256 Flash via PCIe link

hello,everyone!

I want to reconfigured EPCQ256 Flash via PCIe link, Our EPCQ256 is connected with the FPGA by ASx4.

i am thinking about build a EPCQ256 Control Module and then include in my top design, but i was wondering Whether they are dedicated pins.

or is there any Official loaded modules or ip that i can use directly ?