Programming FPGA through RISC-V

I am connecting a Arria 10 Programmable Acceleration Card FPGA to Hifive Sifive Unmatched Board through PCIe Gen3 x16 and trying to program it through RISC-V CPU(SoC) available on Hifive Sifive Unmatched Board.Can you suggest any ideas on how to load bitstream file into the FPGA through RISC-V CPU OS terminal.Is it possible to program FPGA through RISC-V CPU .If so,kindly provide solution

Thanks & Regards

KN Ganendra Murthy