Re: USB driver for MPC850/823

The simple reason (makes me blush) why buffers in SDRAM didn't work was
beacuse I omitted to flush the cache. (Thanks Brad and Malek)

I did a quick change and an even quicker test.
Patch attached.

Cheers
 Bjorn

Dan Malek wrote:

snip

When using the CPM on the 8xx, you have to be careful about the cache
attributes on the pages as the 8xx doesn't have bus snooping to ensure
coherency.  I use a couple of different methods to get memory allocated
in the kernel for the CPM, sometimes they are cached and require software
management, other times not cached.  Depends upon how it is used.