From mboxrd@z Thu Jan  1 00:00:00 1970
Return-path: <barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org>
Received: from astoria.ccjclearline.com ([64.235.106.9])
 by merlin.infradead.org with esmtps (Exim 4.76 #1 (Red Hat Linux))
 id 1TenjZ-0000Sc-0Q
 for barebox@lists.infradead.org; Sat, 01 Dec 2012 14:07:57 +0000
Date: Sat, 1 Dec 2012 09:07:53 -0500 (EST)
From: "Robert P. J. Day" <rpjday@crashcourse.ca>
In-Reply-To: <CAA4bVAHj_Q12r087kYOvwXj+9vRb1cFANa7nMUKTQzH+qmmEAw@mail.gmail.com>
Message-ID: <alpine.DEB.2.02.1212010906080.13744@oneiric>
References: <alpine.DEB.2.02.1212010809040.13064@oneiric>
 <alpine.DEB.2.02.1212010818090.13158@oneiric>
 <CAA4bVAHj_Q12r087kYOvwXj+9vRb1cFANa7nMUKTQzH+qmmEAw@mail.gmail.com>
MIME-Version: 1.0
List-Id: <barebox.lists.infradead.org>
List-Unsubscribe: <http://lists.infradead.org/mailman/options/barebox>,
 <mailto:barebox-request@lists.infradead.org?subject=unsubscribe>
List-Archive: <http://lists.infradead.org/pipermail/barebox/>
List-Post: <mailto:barebox@lists.infradead.org>
List-Help: <mailto:barebox-request@lists.infradead.org?subject=help>
List-Subscribe: <http://lists.infradead.org/mailman/listinfo/barebox>,
 <mailto:barebox-request@lists.infradead.org?subject=subscribe>
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: 7bit
Sender: barebox-bounces@lists.infradead.org
Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org
Subject: Re: how does barebox deal with more than one environment?
To: Antony Pavlov <antonynpavlov@gmail.com>
Cc: "U-Boot Version 2 (barebox)" <barebox@lists.infradead.org>

On Sat, 1 Dec 2012, Antony Pavlov wrote:

> On 1 December 2012 17:19, Robert P. J. Day <rpjday@crashcourse.ca> wrote:
> > On Sat, 1 Dec 2012, Robert P. J. Day wrote:
> >
> >>
> >>   writing up a simple barebox exercise for students and on this page:
> >>
> >> http://wiki.barebox.org/doku.php?id=user:first_steps
> >>
> >> it seems clear(?) that you can define multiple environments that will
> >> appear at /dev/env0, /dev/env1, etc, but that page also claims that
> >> *only* the configuration on /dev/env0 will be executed automatically
> >> if barebox finds that it's a valid configuration sector.
> >>
> >>   so what happens with the additional environments?  that page doesn't
> >> make it clear.  i'm just about to read the source to see if i can
> >> figure this out.
> >
> >   oh, wait, i think i see ... the "loadenv" command will load a given
> > environment into a directory so i'm *assuming* that additional
> > environments are simply available to be loaded, but /dev/env0 is the
> > only one treated special.  or feel free to correct me if i'm
> > hopelessly wrong.
>
> See common/startup.c:110
>
> #ifdef CONFIG_ENV_HANDLING
>         if (envfs_load(default_environment_path, "/env")) {
> #ifdef CONFIG_DEFAULT_ENVIRONMENT
>                 printf("no valid environment found on %s. "
>                         "Using default environment\n",
>                         default_environment_path);
>                 envfs_load("/dev/defaultenv", "/env");
> #endif
>
> By default  default_environment_path="/dev/env0", but it can be
> overwritten in a board code (e.g. see arch/arm/boards/panda/board.c).

  i realize that -- what i was asking about were the possible
*additional* environments (/dev/env1, /dev/env2, ...) that are
mentioned on that page.

rday

-- 

========================================================================
Robert P. J. Day                                 Ottawa, Ontario, CANADA
                        http://crashcourse.ca

Twitter:                                       http://twitter.com/rpjday
LinkedIn:                               http://ca.linkedin.com/in/rpjday
========================================================================

_______________________________________________
barebox mailing list
barebox@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/barebox