RTOS/OMAP-L138: How to change a default interrupt # that IPC v3 use?

Part Number:OMAP-L138

Tool/software:TI-RTOS

Hi there, I am using IPC v3 in the DSP core of OMAPL138. I would like to change the INT# used by the DSP core. currently the IPC logic is using INT5 and I would like to change this to INT8. Please, let me know how to change this. Thanks. 

Regards,

Mitesh