From: Ralf Baechle <ralf@linux-mips.org>
To: "Maciej W. Rozycki" <macro@ds2.pg.gda.pl>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>,
Carsten Langgaard <carstenl@mips.com>,
Dominic Sweetman <dom@algor.co.uk>,
linux-mips@linux-mips.org
Subject: Re: Promblem with PREF (prefetching) in memcpy
Date: Fri, 4 Oct 2002 15:17:18 +0200 [thread overview]
Message-ID: <20021004151718.A16064@linux-mips.org> (raw)
In-Reply-To: <Pine.GSO.3.96.1021004145625.6208C-100000@delta.ds2.pg.gda.pl>; from macro@ds2.pg.gda.pl on Fri, Oct 04, 2002 at 03:01:17PM +0200
On Fri, Oct 04, 2002 at 03:01:17PM +0200, Maciej W. Rozycki wrote:
> > > Is a bus error exception an address related exception ?
> > > I'm afraid some implementation think it's not.
> >
> > So you need an option for broken systems, no new news 8)
>
> For MIPS a bus error exception is not an address related exception by
> definition (not surprising, anyway). Specifically, the BadVaddr register
> is not set upon one.
A particular pain is the exception can be delayed almost arbitrarily due to
posted writes. So quite frequently there is no easy association between
the machine state at exception time and the cause ...
Ralf
next prev parent reply other threads:[~2002-10-04 13:17 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-10-04 7:50 Promblem with PREF (prefetching) in memcpy Carsten Langgaard
2002-10-04 11:53 ` Dominic Sweetman
2002-10-04 12:11 ` Carsten Langgaard
2002-10-04 12:35 ` Dr. David Alan Gilbert
2002-10-04 12:36 ` Alan Cox
2002-10-04 12:35 ` Carsten Langgaard
2002-10-04 13:09 ` Alan Cox
2002-10-04 13:07 ` Hartvig Ekner
2002-10-04 13:07 ` Hartvig Ekner
2002-10-04 13:00 ` Kevin D. Kissell
2002-10-04 13:00 ` Kevin D. Kissell
2002-10-04 13:15 ` Alan Cox
2002-10-04 13:15 ` Kevin D. Kissell
2002-10-04 13:15 ` Kevin D. Kissell
2002-10-04 13:44 ` Alan Cox
2002-10-04 14:17 ` Kevin D. Kissell
2002-10-04 14:17 ` Kevin D. Kissell
2002-10-04 14:54 ` Alan Cox
2002-10-04 13:01 ` Maciej W. Rozycki
2002-10-04 13:17 ` Ralf Baechle [this message]
2002-10-04 13:32 ` Maciej W. Rozycki
2002-10-04 13:29 ` Dominic Sweetman
2002-10-04 13:46 ` Maciej W. Rozycki
2002-10-04 12:33 ` Hartvig Ekner
2002-10-04 12:33 ` Hartvig Ekner
2002-10-04 12:38 ` Ralf Baechle
2002-10-04 12:36 ` Kevin D. Kissell
2002-10-04 12:36 ` Kevin D. Kissell
2002-10-04 14:24 ` Dominic Sweetman
2002-10-04 14:24 ` Dominic Sweetman
2002-10-04 23:43 ` Ralf Baechle
2002-10-05 15:12 ` Hartvig Ekner
2002-10-05 15:12 ` Hartvig Ekner
2002-10-05 15:56 ` Alan Cox
2002-10-04 12:37 ` Kevin D. Kissell
2002-10-04 12:37 ` Kevin D. Kissell
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