AnsweredAssumed Answered

SDMA >64 BD and cache/snooping?

Question asked by Zozobra on Jul 10, 2016
Latest reply on Jul 12, 2016 by igorpadykov

I am doing a bare-metal i.MX6 quad.

 

Question 1:

The basic SDMA engine (scripts) only allows 64 buffer descriptors.  Can this be increased (new scripts)? 

 

Question 2:

Also, the example SDK shows that the buffer (not BD) memory must be non-cache.  Compared to the PowerQuiccII this seems like a drawback.  Does the SDMA engine allow snooping on the bus so that the buffer memory can be cached?

Outcomes