get_free_pages or kmalloc alignment in PPC

[<fh...@at...>]

Is there any info on how to align memory in the Linux PPC
kernel.  Actually info on how get_free_pages aligns memory.
I'm guessing that this is the major problem with getting the
PuP SCSI working.

It looks like what most of the drivers I looked at do is add
a little extra to the size of the chunk and then move the
pointer so it's on a 32 bit boundary.  Seems simple enough.
What if the chip that wants to do DMA only needs 16 bit
(or 8 bit) alignment?  It seems that then there is a further  problem
where the memory needs to be "synced" so the 
16bit or 8 bit parts line up with the 32bit parts.

Fred