Re: Question about caching

[Jason Thorpe <thorpej%shagadelic.org@localhost>]

Ping?  Does no one else remember either? :-)

On Aug 25, 2009, at 5:37 PM, Jason Thorpe wrote:

> I have forgotten some of the details about how the cache on the m68k  
> works, and I long since got rid of my manuals, so I need to ask the  
> question here :-)
>
> If a page is mapped into multiple pmaps (e.g. kernel pmap and a user  
> pmap), and one of those mappings is cache-inhibited, do all of the  
> mappings need to be cache-inhibited?  My feeling is that the answer  
> is "yes".
>
> I know I need to do this for the HP MMU/VAC case (separate VACs for  
> kernel/user), but I want to verify for the physically-addressed  
> cache case.
>
> Thanks.
>
> -- thorpej

-- thorpej