My project was quite a long time ago. I was using 2.6.32 from one of TI PSP packages. I was using EDMA on a SPI port on the DSP. I was getiing weird panics in conflict with EDMA on UART on the ARM. I was getting spurious EDMA SPI IRQs on the ARM side. I worked around this by avoiding UART output on the ARM and by changing the EDMA ISR to ignore spurious IRQs. Carefully changing the reserved numbers did seem to help some.
No idea who to ask about those reserved numbers. I posted about EDMA problems as well and did not receive any response back then.
That's all I got. Perhaps try not using EDMA and use code to move data around. I get the impression that TI wants everybody to use the DSP as just a number cruncher for the ARM. It should not be talking to peripherals.