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From: Paul Mundt <lethal@linux-sh.org>
To: linux-sh@vger.kernel.org
Subject: Re: User mode address error problems on 7763
Date: Tue, 15 Sep 2009 11:57:18 +0000	[thread overview]
Message-ID: <20090915115717.GA22736@linux-sh.org> (raw)
In-Reply-To: <6e6aa1a80909111106l6dbcfccag4e9e7a3abb922688@mail.gmail.com>

On Tue, Sep 15, 2009 at 06:54:35AM -0500, Dale Larson wrote:
> On Tue, Sep 15, 2009 at 3:39 AM, Matt Fleming <matt@console-pimps.org> wrote:
> > OK, these are unexpected fixups and similar to the issues I've been
> > seeing. The current train of thought is that these unaligned accesses
> > are a symptom of having aliases in the D-cache. I've been trawling
> > through the cache/tlb code for SH4 and so far haven't found the bug.
> >
> > As a little experiment, could you try bumping the page size from 4K to
> > 8K and see if the unaligned accesses go away? If they are caused by
> > D-cache aliasing, in theory, they should disappear with 8K pages.
> 
> The 7763 only supports 1K, 4K, 64K and 1M pages. Would a 64K page
> yield any useful info?
> 
You can get 8kB pages by enabling extended mode TLB. But yes, 64k pages
are fine too, if using the compat mode TLB.

  parent reply	other threads:[~2009-09-15 11:57 UTC|newest]

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-09-11 18:06 User mode address error problems on 7763 Dale Larson
2009-09-11 18:35 ` Matt Fleming
2009-09-11 19:16 ` Dale Larson
2009-09-14 13:02 ` Dale Larson
2009-09-14 13:10 ` Paul Mundt
2009-09-14 13:14 ` Matt Fleming
2009-09-14 13:54 ` Dale Larson
2009-09-15  8:39 ` Matt Fleming
2009-09-15 11:54 ` Dale Larson
2009-09-15 11:57 ` Paul Mundt [this message]
2009-09-15 12:20 ` Dale Larson
2009-09-15 12:36 ` Paul Mundt
2009-09-15 12:55 ` Dale Larson
2009-09-15 13:07 ` Paul Mundt
2009-09-15 13:16 ` Dale Larson
2009-09-15 13:23 ` Dale Larson
2009-09-15 13:29 ` Dale Larson
2009-09-15 13:39 ` Paul Mundt
2009-09-15 13:49 ` Valentin R Sitsikov
2009-09-15 14:43 ` Dale Larson
2009-09-15 23:42 ` Paul Mundt
2009-09-16 12:45 ` Dale Larson
2009-09-16 19:22 ` Dale Larson

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