Re: [PATCH 53/61] 82xx: Set NOT_COHERENT_CACHE on 8272 with PCI.

On Jul 18, 2007, at 3:08 PM, Scott Wood wrote:

Kumar Gala wrote:

quoted

On Jul 17, 2007, at 10:28 PM, David Gibson wrote:

quoted

Hrm... I for one would be a lot more comfortable with this patch if
you had a theoretical explanation for why it's necessary, in  
addition
to the "seems to fix things".

Sure, so would I; I just wanted to point out the issue, and make  
available a quick fix for anyone else that might be having problems.

My theoretical explanation is that the hardware is broken. :-P

quoted

I agree w/David.  Have you tried turning on the   
CPU_FTR_NEED_COHERENT?  Take a look at include/asm-powerpc/ 
cputable.h  and search for the reference to CONFIG_PPC_83xx.

OK, that appears to work as well.

Can you dump the POCMRx registers and report their values and what / 
proc/iomem looks like.

- k