From mboxrd@z Thu Jan 1 00:00:00 1970 From: Simon Schwarz Date: Fri, 21 Oct 2011 13:08:57 +0200 Subject: [U-Boot] [PATCH 5/7] omap_gpmc: use SOFTECC in SPL if it's enabled In-Reply-To: <4EA03CFB.8040302@emcraft.com> References: <1318894433-9038-1-git-send-email-yanok@emcraft.com> <1318894433-9038-6-git-send-email-yanok@emcraft.com> <4EA00D56.9070103@gmail.com> <4EA03CFB.8040302@emcraft.com> Message-ID: <4EA152C9.1040407@gmail.com> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de Hi Ilya, On 10/20/2011 05:23 PM, Ilya Yanok wrote: > Hi Simon, > > On 20.10.2011 16:00, Simon Schwarz wrote: >>> Use software ECC for the SPL build if support for software ECC in SPL is >>> enabled. >> >> I'am curious: Is there a special reason for having software ecc in SPL? > > Well, yes. On OMAP2+ ECC mode defaults to software (incompatible with HW > mode; 256 vs 512 bytes block size) both in U-Boot and Linux (U-Boot has > command to change it while in Linux you have to recompile the kernel). > > So we need software ecc to read images written from Linux. ok. Agreed. Another thing just poped into my mind, ATM I have a DMA patch for devkit8000 on the ML: http://article.gmane.org/gmane.comp.boot-loaders.u-boot/109744 http://article.gmane.org/gmane.comp.boot-loaders.u-boot/112661 It speeds up the process of copying the u-boot/linux image. ATM this is in combination with HW ecc and I doubt that it will work seamlessly with SW-ecc, yet. However IMHO DMA in combination with SW-ecc could be nearly as fast as using HW-ecc. So maybe an adaption is worth a try? Regards Simon