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SRIO in DSP/BIOS error

I am testing  the SRIO funtion  in EVM6474 using the CSL library.

It can work correctly!A DSP can receive the data from the other one.

But when I transplant those codes into a DSP/BIOS  project,A error occoured!

 LSU0_REG6 ==  0x0000000A,

it means "DMA transfer error"!

firstly, I define a  unsigned char array as the source buffer,  error occour !

then,I use "MEM_alloc" to malloc the source buffer,But still error!

Can anybody help me,Thanks!