[Xenomai] Trying to install Xenomai 3.0.3 on i.MX6 Kernel 4.1.15

Mauro Salvini mauro.salvini at smigroup.net
Tue Mar 21 08:38:31 CET 2017


On Mon, 2017-03-20 at 17:34 +0100, Cédric Perles wrote:
> Hi Mauro,
> 
> In fact, I was booting the wrong kernel through tftp. Using the correct one, 
> I have indeed IPIPE and XENOMAI running.
> Sorry for bothering you and thx for your time.

You are welcome.

> 
> By the way, is there any classical traps to know concerning Xeno 3.0.3 on 
> iMX6 ?

You should pay attention to L2 cache: if you experience high latencies
it could be a culprit (see cache write disable handling in
arch/arm/mm/cache-l2x0.c). For everything else, I have found all things
I needed in documentation and mailing-list.

Regards


> 
> Regards
> 
> Cédric
> 
> 
> 
> 
> -----Message d'origine-----
> De : Mauro Salvini [mailto:mauro.salvini at smigroup.net]
> Envoyé : lundi 20 mars 2017 15:44
> À : Cédric Perles
> Cc : xenomai at xenomai.org
> Objet : Re: [Xenomai] Trying to install Xenomai 3.0.3 on i.MX6 Kernel 4.1.15
> 
> On Mon, 2017-03-20 at 15:29 +0100, Cédric Perles wrote:
> > Hi Mauro,
> >
> > First of all, thx for your answer. Knowing that Xenomai 3.0.3 is
> > possible on
> > iMX6 kernel 4.1.15 is already a relief for me.
> >
> > I compile my kernel through BuildRoot that automatically builds the
> > .config file.
> > However, when I check into kernel menuconfig, I can see I-PIPE is
> > selected (kernel Features -> -*- Interrupt pipeline) and Xenomai is
> > selected ([*] Xenomai/cobalt ).
> > My .config file is also OK (CONFIG_IPIPE=y , CONFIG_IPIPE_CORE=y,
> > CONFIG_XENOMAI=y).
> >
> > ==> What IPIPE patch did you use ?
> I use ipipe-core-4.1.18-arm-9 from git.xenomai.org without problem.
> Configuration comes from Yocto's meta-freescale layer defconfig.
> 
> > ==> Does IPIPE need something from RootFS ?
> AFAIK no, you don't need anything from rootfs to enable i-pipe in kernel.
> 
> 
> So running from console
> 
> dmesg | grep -i -e pipe -e xenomai
> 
> doesn't show nothing?
> 
> Regards
> Mauro
> 
> >
> > Regards,
> >
> > Cédric
> >
> >  Sepro<http://extranet.sepro-robotique.com/signatures/Logo_GROUP.jpg>
> >
> > Cédric PERLES
> > Software R&D engineer
> > SEPRO Robotique - Rue Henry Bessemer - Zone Acti-Est - CS 10084 -
> > 85003 La Roche sur Yon Cedex (France)
> >
> > Tel : +33 (0)2 51 45 05 31
> >
> > ________________________________
> >
> > www.sepro-group.com <http://www.sepro-group.com/fr>  |
> > twitter at SeproGroup <https://twitter.com/seprogroup>
> >
> >
> >
> >
> > -----Message d'origine-----
> > De : Mauro Salvini [mailto:mauro.salvini at smigroup.net]
> > Envoyé : lundi 20 mars 2017 09:34
> > À : Cédric Perles
> > Cc : xenomai at xenomai.org
> > Objet : Re: [Xenomai] Trying to install Xenomai 3.0.3 on i.MX6 Kernel
> > 4.1.15
> >
> > On Mon, 2017-03-20 at 08:52 +0100, Cédric Perles wrote:
> > > Hi community,
> > >
> > >
> > >
> > > I’m a Xenomai newby and I’m trying to install Xenomai 3.0.3 on my
> > > i.MX6 based board (kernel 4.1.15 from NXP).
> > >
> > >
> > >
> > > So I followed the “Installing Xenomai 3.x” chapter in Xenomai.org
> > > site and began to download ipipe-core-4.1.18-arm-8.patch.
> > >
> > > Since my kernel is not 4.1.18 but 4.1.15, I had to slightly adapt
> > > the patch to make it fit.
> > >
> > > Then I ran prepare-kernel.sh that tells me everything was OK.
> > >
> > > Finally I successfully compiled kernel (and saw a few ipipe and
> > > xenomai source files were built with into kernel).
> > >
> > >
> > >
> > > However, when I boot on that newly built kernel there is absolutely
> > > no xenomai nor ipipe logs into kernel boot logs, and no /proc/xenomai at 
> > > all.
> > >
> > > I must have missed something or doing something wrong, but I don’t see.
> > >
> > >
> > >
> > > ==> Did somebody successfully run Xeno 3.0.3 on i.MX6 ?
> > >
> > > ==> What am I doing wrong ?
> > >
> > Hi Cédric,
> >
> > I'm using Xenomai 3.0.3 with 4.1.15 kernel from NXP community with 
> > success.
> >
> > What defconfig have you used to configure your kernel? Before build
> > it, did you check with 'make menuconfig' that i-pipe was enabled?
> >
> > Regards
> > Mauro
> > >
> > >
> > > Regards,
> > >
> > >
> > >
> > > Cédric
> > >
> > >
> > >
> > >
> > > Sepro
> > >
> > > Cédric PERLES
> > > Software R&D engineer
> > > SEPRO Robotique - Rue Henry Bessemer - Zone Acti-Est - CS 10084 -
> > > 85003 La Roche sur Yon Cedex (France)
> > >
> > > Tel : +33 (0)2 51 45 05 31
> > >
> > >   _____
> > >
> > >  <http://www.sepro-group.com/fr> www.sepro-group.com |
> > > <https://twitter.com/seprogroup> twitter at SeproGroup
> > >
> > >
> > >
> > >
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