From mboxrd@z Thu Jan 1 00:00:00 1970 From: Matthias Kaehlcke Date: Fri, 5 Mar 2010 13:31:20 +0100 Subject: [U-Boot] Two U-Boot versions on same device In-Reply-To: References: Message-ID: <20100305123120.GD17414@darwin> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de El Fri, Mar 05, 2010 at 07:09:11AM -0500 Rishi Dhupar ha dit: > Strange question but I am using an OMAP 3530 and the boot process currently > is from TI's X-Loader to U-Boot to Linux. > > What I want is to have two different versions of U-Boot, an extremely > optimized and small one (to reduce boot time) but then also a debug version > that has a built in device test suite and allows updating of the Linux > kernel. > > The optimized version would boot first and then check if a GPIO is set, if > so then it would boot into the debug U-Boot to perform tests or software > updates. > > Anyone do anything like this or is it even possible? i think it should be possible, but i wonder if you really need this. do you have hard data that suggest that the test suite or allowing to update the linux slows down U-Boot significantly? in my environment i use scripts stored in environment variables to update the kernel and the rootfs, afaik this doesn't add any overhead at all. the test suite you mentioned might be a different issue depending on its size, as it has to be copied from flash to RAM at boot time. if it's just adds a few kB i think it shouldn't be relevant, especially on your high-profile system best regards -- Matthias Kaehlcke Embedded Linux Developer Barcelona There is no passion to be found playing small - in settling for a life that is less than the one you are capable of living (Nelson Mandela) .''`. using free software / Debian GNU/Linux | http://debian.org : :' : `. `'` gpg --keyserver pgp.mit.edu --recv-keys 47D8E5D4 `-