From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mailout-de.gmx.net ([213.165.64.22]) by canuck.infradead.org with smtp (Exim 4.72 #1 (Red Hat Linux)) id 1Q9xjf-0001Ek-LH for barebox@lists.infradead.org; Wed, 13 Apr 2011 10:55:48 +0000 Message-ID: <4DA58130.5060709@gmx.de> Date: Wed, 13 Apr 2011 12:55:44 +0200 From: Thomas Mayer MIME-Version: 1.0 References: <4D9ED2EC.8070406@telemotive.de> <20110408132127.GW7285@pengutronix.de> <4DA56CC1.6040904@gmx.de> <4DA5720E.7020601@pengutronix.de> In-Reply-To: <4DA5720E.7020601@pengutronix.de> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Sender: barebox-bounces@lists.infradead.org Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org Subject: Re: Update barebox on mmc without touching partition table To: barebox@lists.infradead.org Hi Marc, Am 13.04.2011 11:51, schrieb Marc Kleine-Budde: > On 04/13/2011 11:28 AM, Thomas Mayer wrote: >>>> to copy barebox to a mmc I use the command "dd if=barebox.bin >>>> of=/dev/sdb bs=512 seek=2 skip=2&& sync". So I don't touch the >>>> first 0x400 bytes with contains the partition table and everything >>>> is fine. >>>> >>>> But I want to write a little script to update barebox itself via >>>> tftp. So I create a partition "/dev/self0" (0x00000 to 0x40000) and >>>> update barebox with "tftp barebox.bin /dev/self0". The problem is >>>> that barebox write the first 0x400 bytes too and overwrite the >>>> partition table . >>>> >>>> Is there any way to "seek" and "skip" with barebox? >>> Not directly. What you can do is this: >>> >>> tftp barebox.bin >>> memcpy -s barebox.bin -d /dev/self0 512 0 >> It's working, but I have to use "1024" instead of "512". Also I have to >> change my partition init from >> "devfs_add_partition("disk0", 0x000000, 0x040000, PARTITION_FIXED, >> "self0");" >> to >> devfs_add_partition("disk0", 0x000400, 0x040000, PARTITION_FIXED, "self0"); > what about using: > > memcpy -s barebox.bin -d /dev/self0 1024 1024 > works too, with partition from 0x00000 to 0x040000. Regards, Thomas _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox