-Original Message-
From: Dan Malek [mailto:ppc6...@digitaldans.com]
Sent: Wednesday, February 23, 2011 8:39 PM
To: John Linn
Cc: linuxppc-...@ozlabs.org
Subject: Re: Flushing data cache on PPC405 in Linux
Hi John.
On Feb 23, 2011, at 5:04 PM, John Linn wrote:
Any thoughts
-Original Message-
From: John Linn
Sent: Thursday, February 24, 2011 7:15 AM
To: 'Dan Malek'
Cc: linuxppc-...@ozlabs.org; grant.lik...@secretlab.ca
Subject: RE: Flushing data cache on PPC405 in Linux
-Original Message-
From: Dan Malek [mailto:ppc6...@digitaldans.com
On Feb 24, 2011, at 6:43 AM, John Linn wrote:
It seems like this also depends on that fact that __GFP_COLD will
work,
otherwise some of the data could
already be in the cache such that you're not guaranteed to get
everything out of the cache.
I wouldn't count on GFP_COLD as a guarantee the
I have a situation that requires a flush the data cache at specific time
periods to help with memory scrubbing.
On the 405, I don't see any easy way to do this since you don't know
what the cache has in it and there's not an instruction to flush the
whole cache. It looks like a kernel driver is
Hi John.
On Feb 23, 2011, at 5:04 PM, John Linn wrote:
Any thoughts?
I can come up with two methods, but before I describe them
ensure you consider the actual implementation of your 405 core.
My comments are based on the standard ppc405 processor,
but since you can configure the embedded
