I'm using a Cyclone IV GX FPGA and take advantage of the contained PCIe hard IP. In order to get around a cache issue, I would like to configure an I/O BAR instead of a memory BAR. However, I cannot spot a possibility to configure this in the PCIe Compiler in Platform Designer (18.1).
Thanks for your inputs.
Cyclone IV GX does not support I/O BAR implementation. My apologies on this.
This is covered in our documentation (Pg37):