On 05/13/2016 07:32 AM, Alexander Graf wrote: > >> Am 13.05.2016 um 16:26 schrieb Stuart Yoder <stuart.yo...@nxp.com>: >> >> >> >>> -----Original Message----- >>> From: Alexander Graf [mailto:ag...@suse.de] >>> Sent: Friday, May 13, 2016 7:22 AM >>> To: u-boot@lists.denx.de >>> Cc: Stuart Yoder <stuart.yo...@nxp.com>; york sun <york....@nxp.com> >>> Subject: [PATCH 5/5] ls2080ardb: Convert to distro boot >>> >>> Most new systems in U-Boot these days make use of the generic "distro" >>> framework which allows a user to have U-Boot scan for a bootable OS >>> on all available media types. >>> >>> This patch converts the LS2080ARDB board to use that framework instead >>> of booting from a hard coded flash offset. >>> >>> Signed-off-by: Alexander Graf <ag...@suse.de> >>> >>> --- >>> >>> This obviously means that we can no longer boot from said offset. Is >>> that a reasonable thing to do or should I put the bootm back into the >>> default boot command and only do distro boot if it fails? >> >> To date all armv8 FSL/NXP sdk releases, field engineers, etc have been using >> bootm. I'm a little concerned about changing the default boot command >> right now...as I assume things will unexpectedly appear to just stop >> working. Or, is booting from the NOR flash one of the distro boot >> "media" types? > > The problem with boot from NOR is that we have no source of information on > what lies where. So distro boot can't have it in its target list, as you have > to know magical offsets. > > We could put the magical bootm after tge distro list, but that would mean > that field engineers get pxe boot with long timeouts first and then their NOR > bootm booted. > > So the only option left that I can see is to always try magical offset NOR > bootm and do distro boot if it fails. Then just tell people to write zeros to > the NOR kernel offset and they get distro boot automatically. >
Alex, I suggest to attempt current boot method before moving on to other sources. I presume booting from NOR would check the image header first. If the image is valid, go ahead to boot it. Otherwise, move on. Beside, it would be helpful to define a list and order of boot source. York _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
