ubldr question

[Ian Lepore]

On Sun, 2017-12-17 at 21:19 +0200, Daniel Braniss wrote:
> 
> > 
> > On 17 Dec 2017, at 19:02, Ian Lepore <ian at freebsd.org> wrote:
> > 
> > On Sun, 2017-12-17 at 17:03 +0200, Daniel Braniss wrote:
> > > 
> > > Hi,
> > > in the past there was CONFIG.TXT and/or UENV.TXT where I could
> > > override the
> > > default .dtb file set by uboot, but now it seems these files are
> > > either not read, or the
> > > command has changed.
> > > 
> > > So, apart from stoping the loader, and typing ‘env set fdtfile
> > > xxx.dtb’
> > > is there another way?
> > > 
> > > cheers,
> > > 	danny
> > > 
> > You should be able to "saveenv" after making your change.
> > 
> > The uEnv.txt that used to be supported was to make it possible to
> > programatically change the boot behavior from freebsd
> > userland.  That
> > feature got lost when the uboot ports were all rewritten to use a
> > default environment (boot scripts and all) for freebsd that is
> > basically identical to what linux uses.  It's a lot less work for
> > the
> > port maintainers, but we lost some functionality along the way.
> > 
> > — Ian
> thank sIan,
> that did it, now if uboot could figure out what SOC it booted from
> and choose the appropriate
> dtb file would be great!
> 
> cheers,
> 	danny
> 

I'm not sure why it's not doing so, but you can work around it by
manually doing "setenv fdt_file yourfilename.dtb" then saveenv.

-- Ian