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TDA4VM: How to use DMA between CPU and DSP

Part Number: TDA4VM

Hello, 

       When I  use TDA4VM for computer vision development. I meet a problem: I want to transfer image data from CPU to DSP for further processing(mainly based on TIOVX).

       But,e  the  PFS after DSP dealing is quite slow  ~  However the DSP loading is only about 60%, thus the problem shall be the bandwidth between CPU and DSP.

       To accelerate the communication, I want to use DMA. However, from the TIVOX  user guideline. I can't find useful information. 

       Only a compile option BUILD_BAM which is related with  DMA. no further infomation.

       My question is: does current version of SDK support DMA? if yes, is there  any guideline (how to setup in code and how to  integrate?) If no, there any plan?  (my sdk is 7.3)

       Thank you!