[U-Boot] [RFC PATCH] ARM: Merge v7 and v8 outer cache operations

Albert ARIBAUD albert.u.boot at aribaud.net
Thu Apr 2 08:57:15 CEST 2015


Hello Mark,

On Mon, 30 Mar 2015 10:39:36 +0100, Mark Rutland <mark.rutland at arm.com>
wrote:
> On Fri, Mar 27, 2015 at 02:11:48PM +0000, Albert ARIBAUD wrote:
> > Hello Mark,
> > 
> > On Thu, 12 Feb 2015 15:56:52 +0000, Mark Rutland <mark.rutland at arm.com>
> > wrote:
> > > On Sat, Jan 31, 2015 at 03:08:54AM +0000, fenghua at phytium.com.cn wrote:
> > > > From: David Feng <fenghua at phytium.com.cn>
> > > > 
> > > > Armv7 and Armv8 allow outer cache exist, it is outside of the architecture
> > > > defined cache hierarchy and can not be manipulated by architecture defined
> > > > instructions. It's processor specific.
> > > > This patch merge v7_outer_cache_* and v8 l3_cache_*.
> > > 
> > > This commit message is a little misleading, though it probably makes
> > > sense to have something of this sort ARMv8. Info dump below.
> 
> [...]
> 
> > So, does the commit message require rewriting?
> 
> Yup. My complaint was that outer caches _can_ be manipulated by
> architecturally defined instructions, but only for maintenance by VA. So
> it's wrong to say that they cannot be manipulated by archtiecturally
> defined instructions.

Thanks. I expect a new version of this patch, then (and a non-RFC one
if the commit message is the only thing to fix).

> Mark.

Amicalement,
-- 
Albert.


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