I, To avoid cache problem when doing dma transfer on a MPC8245 I want to set myself the WIMG flags of the pte entry for a mapped block of memory. Where can I do this. I don't find the code responsible to create the pte and to set those flags for the MPC8245.
The purpose of this is to do PowerPC initiated DMA on pre-allocated buffers. And I have some problems with datas not well written sometime whith copy_from_user. Can this be related to the use of get_free_page instead of kmalloc ? Or does someone have an idea to ensure cache coherency for the DMA transfer without using bus snooping if possible. Like a manual management of the cache (using flush_dcache_range and invalidate_dcache_range for example) Thanks, Benoit Callebaut ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
