From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from metis.ext.pengutronix.de ([2001:6f8:1178:4:290:27ff:fe1d:cc33]) by bombadil.infradead.org with esmtps (Exim 4.76 #1 (Red Hat Linux)) id 1RpIgc-0007MN-BT for barebox@lists.infradead.org; Mon, 23 Jan 2012 12:07:48 +0000 Date: Mon, 23 Jan 2012 13:07:38 +0100 From: Sascha Hauer Message-ID: <20120123120738.GB26642@pengutronix.de> References: <1324133529-2036-1-git-send-email-s.hauer@pengutronix.de> <1324133529-2036-8-git-send-email-s.hauer@pengutronix.de> <20120101043717.GC945@game.jcrosoft.org> <20120102141345.GB5446@pengutronix.de> <20120102150901.GF945@game.jcrosoft.org> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20120102150901.GF945@game.jcrosoft.org> 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: [PATCH 7/9] ARM: move exception vectors away from start of binary To: Jean-Christophe PLAGNIOL-VILLARD Cc: barebox@lists.infradead.org On Mon, Jan 02, 2012 at 04:09:01PM +0100, Jean-Christophe PLAGNIOL-VILLARD wrote: > On 15:13 Mon 02 Jan , Sascha Hauer wrote: > > On Sun, Jan 01, 2012 at 05:37:17AM +0100, Jean-Christophe PLAGNIOL-VILLARD wrote: > > > On 15:52 Sat 17 Dec , Sascha Hauer wrote: > > > > Traditionally U-Boot and barebox have the exception vectors at > > > > the start of the binary. There is no real reason in doing so, > > > > because in the majority of cases this data will not be at 0x0 > > > > where it could be used as vectors directly anyway. > > > > This patch puts the vectors into a separate linker section and > > > > defines an head function which is placed at the start of the > > > > image instead. Putting this in a separate function also has > > > > the advantage that it can be placed at the start of images > > > > which require an additional header like several Freescale i.MX > > > > images. As the head function contains the barebox arm magic > > > > those images can now also be detected aas barebox images. > > > > > > > > Signed-off-by: Sascha Hauer > > > > --- > > > I've to make it optionnal as on AT91 for boot we must have it at the bigeniing > > > of the binary > > > > Instead of this: > > > > "b reset\n" > > ".rept 7\n" > > ".word 0x0\n" > > ".endr\n" > > > > we could do this: > > > > "b reset\n" > > ".rept 7\n" > > "1: b 1b\n" > > ".endr\n" > > > > This looks like a exception vector table for the at91 bootloader. BTW > > I just looked at a at91 datasheet and at least on the at91sam9260 the > > sixth vector should contain the image size to copy. So maybe this does > > not work on at91 anyway? > I'm working on it so please hold on this ping. I'd really like to merge the remaining thumb2 support pieces. Sascha -- Pengutronix e.K. | | Industrial Linux Solutions | http://www.pengutronix.de/ | Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 | _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox