On Wed, Apr 27, 2016 at 6:41 PM, Marek Vasut <ma...@denx.de> wrote: > On 04/28/2016 01:32 AM, Robert Nelson wrote: > > > > > > On Wed, Apr 27, 2016 at 6:28 PM, Marek Vasut <ma...@denx.de > > <mailto:ma...@denx.de>> wrote: > > > > On 04/28/2016 01:16 AM, Tom Rini wrote: > > > On Thu, Apr 28, 2016 at 01:06:07AM +0200, Marek Vasut wrote: > > > > > >> Enable support for booting U-Boot image from filesystem instead > of some > > >> random offset on the SD card. This makes the board usable by > putting the > > >> u-boot.img to first partition of the SD card and writing the SPL > this way: > > >> $ dd if=u-boot-with-spl.imx of=/dev/sdX seek=2 bs=512 > > > > > > Wait, you're still writing u-boot + SPL to the device and not just > SPL, > > > but it's still preferring the filesystem one over the appended one? > > > > > > > Ha, good point. I should've written the 'SPL' file instead, which is > > just the SPL without U-Boot. I don't want to install U-Boot to random > > offset on the SD card as it has the potential to corrupt data if the > > u-boot binary changes in size. > > > > If I install u-boot image to random offset 138 blocks from the start > of > > SD card, it will boot that, otherwise it will load from FS. > > > > I will update the commit message with the correct info, sorry. > > > > > > Oh, we went thru this last year... > > > > http://lists.denx.de/pipermail/u-boot/2015-August/222061.html > > > > If your serious about changing "one" i.mx6 board, you need to change > > them "all". > > No, I do not have to change and will not change any other boards I > cannot test. >
Okay, so if you can't test, are you going to keep an updated database: boardx = boots this way? boardy = boots that way? Otherwise, keep like the other i.mx6's.. Or throw it under a "kconfig" so you can easily enable either mode. > > > Otherwise leave a 1MB hole on your mmc partition and dd spl/u-boot.img > > as that works for ti/imx/sunxi... > > No, this design is utterly broken. If U-Boot grows beyond 1 MiB, it will > corrupt my data, silently. I will not have this. I would much rather see > these broken designs go away and have everyone move to > SPL in random location as mandated by BootROM (unfortunately) and > u-boot.img on a filesystem. That way, u-boot.img can grow and shrink > either way, without endangering any surrounding data. > > Can you give me any argument why writing u-boot.img to random location > on the SD card is better than storing it on a filesystem ? > 1: Yeap, end users like to delete "MLO/u-boot.img" that was in the "fat" boot partition in our production beaglebone images specifically "2014-05-14" which was shipped by default on rev C. Thus soft-bricking/etc boards.. http://beagleboard.org/latest-images Moving it under the 1MB location, has solved that problem. 2: fedora/debian/ubuntu/yocto all expect this board to have these settings.. Regards, -- Robert Nelson https://rcn-ee.com/ _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
