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How to use interrupt from GPIO in OMAP5912 DSP?

I want to use interrupt from GPIO4 module on DSP side. This module connect to Level 2 interrupt handler. I use CCS 3.3 and DSP BIOS 5.31.02.

In DSP BIOS configuration only Level 1 handler interrupt, but exist HWI_INT3 vector, which use by interrupt handler Level 2. I try to configure my GPIO pin (GPIO62) for FIQ interrupt and then make handler for HWI_INT3 vector. If I change level on GPIO62, I see that interrupt flag rose in GPIO4_IRQSTATUS2 register, what indicate the interrupt occur. But I can't see calling my handler function by DSP BIOS. What is problem?