Hi Timur,
In either case, you would use the byte-conversion routines to serialize the descriptor entries in memory, or in the source buffer, into the correct endianness before performing enabling the DMA.
Very true. However, this means that if the original data is in the wrong endian, you have to have a middle layer that modifies the data when copying from the source buffer to the DMA buffer. This adds overhead.
This would be the key question for Vivek then.
Does his highest volume data set have any endianness issues that need to be resolved?
If Vivek's application correctly serializes any endian-specific data before using the MPC8349EA DMA controller, then he should have no issues.
Yes, but it may take him weeks to find all the places in the where the endianness matters.
Indeed.
Conversely, it may take months to get a little-endian PowerPC port working!
:)
Cheers, Dave