in the PFL User guide on page 8 it means:
"The PFL IP core does not support Raw Binary File (.rbf) format."
However on Page 38 under Third-party Programmer Support it tells me to convert a .POF file to .hexout and then .rbf to Program the Flash with Third-party tools...
I'm apologize for late reply regarding to this issue. I'm out of office last 4days.
Yes, PFL is able to configure the FPGA with .rbf file if only you convert POF to rbf. (not SOF to rbf). You no need to write extra Option Bits to the flash device (in rbf file already include Option Bits (in binary form) )
In addition, you may refer to the following KDB link for more information if you want to program using 3rd party programmer.
I hope this will help you.