how to generate an PCIE interrupt

hi ,

i am using cycloneIV device, in qsys am using "IP_compiler_for_PCI express" ip in single DW Completer mode. I have tested PCIe stand alone using Jungo Driver , it was working fine.

i need to generate a interrupt when the data is available , rxm_irq interrupt signal is visible in System inspector in qsys, but is not available in verilog instance generated(HDL Example in qsys). how to generate an interrupt , in user guide given pci express mailbox registers how to access that registers.

Is there any design example for PCI express interrupt.

Thanks.