---------- Debut du message initial -----------
De : [EMAIL PROTECTED]
A : [EMAIL PROTECTED]
Copies : xenomai-core@gna.org
Date : Tue, 26 Sep 2006 16:21:18 +0200
Objet : Re: [Xenomai-core] Problem with periodic timer on
PPC40x solved
> > On Mon, 2006-09-25 at 22:29 +0200, Niklaus Giger wrote:
> > > > Am Montag, 25. September 2006 17:57 schrieb Philippe
Gerum:
> > > > > On Sun, 2006-09-24 at 23:07 +0200, Wolfgang
Grandegger wrote:
> > > > > > Niklaus Giger wrote:
> > <..>
> > > > Is the output of lines like "Xenomai: Switching
display-3238 to secondary
> > > > mode after exception #1025 from user-space at
0x100033c4 (pid 3240)"
> > > > harmless or the result of a activated
CONFIG_XENO_OPT_DEBUG<..> option?
>
> A known hw issue seems to exist with the 405GP (revD), which
causes the
> ESR to be incorrectly set upon FPU emulation trap, which
would in turn
> cause the spurious exception to be relayed to the nucleus by
Adeos. The
> patch below is _not_ the final fix, but rather a way to
check if this
> message is indeed related to the FPU emulation on your
board. Does it
> silence the exception without breaking the box?
The FPU fault may be the result of the latency display thread
using the
FPU: on systems with emulated FPU, this looks normal.
--
Gilles Chanteperdrix
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