From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mail-ia0-f177.google.com ([209.85.210.177]) by merlin.infradead.org with esmtps (Exim 4.76 #1 (Red Hat Linux)) id 1TenP6-0007nD-QJ for barebox@lists.infradead.org; Sat, 01 Dec 2012 13:46:49 +0000 Received: by mail-ia0-f177.google.com with SMTP id u21so1038020ial.36 for ; Sat, 01 Dec 2012 05:46:45 -0800 (PST) MIME-Version: 1.0 In-Reply-To: References: Date: Sat, 1 Dec 2012 17:46:45 +0400 Message-ID: From: Antony Pavlov List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-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: "Robert P. J. Day" Cc: "U-Boot Version 2 (barebox)" On 1 December 2012 17:19, Robert P. J. Day 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). -- Best regards, Antony Pavlov _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox