DSP/IOMMU needs 128-byte alignment from user-space buffers?

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Hi,

I received information from TI saying that user-space buffers need to
be 128-byte aligned for the DSP to work properly.

Is this true or is it some kind of limitation on their MMU code that
might be solved by Hiroshi's iommu?

This impacts quite drastically user-space applications like GStreamer
since a memory copy would be required to achieve that 128-byte
alignment.

They also claim that adding 128-byte padding at the beginning and at
the end achieves the same purpose.

-- 
Felipe Contreras
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