Re: [U-Boot] Where to put a large bootloader-supplied device tree on ARM ?

Hi Rob,

On Thu, 12 Jul 2012 20:28:22 -0500, Rob Herring [off-list ref] wrote:

On 07/12/2012 04:47 PM, Wolfgang Denk wrote:

quoted

Dear Albert ARIBAUD,

In message <20120712233801.0411daa7@lilith> you wrote:

quoted

If I'm not mistaken, yes U-Boot loads itself as high as it can, and I don't
know about the FDT, but no, U-Boot does not "like" to load initrd "just
below that": it loads initrd where the boot commands tell it to, and the
boot commands are written by board developers. Nothing in U-Boot forces
initrd to be loaded as high as possible.

u-boot loads the initrd where you tell it, then bootm relocates it for
some reason.

quoted

quoted

That leaves the question of the FDT, though -- I'm not familiar enough
with it (yet) to tell if it is always located just under U-Boot or if
its placement is controllable by board commands.

You can always just set the "fdt_high" and "initrd_high" evironment
variables to restrict the positioning of initrd and FDT in RAM; see
the README for details.

Yes, I'm aware of all this, but this is not the default behavior and the
default behavior will not work in this case. It also has another bug
related to the relocation that I fixed:

http://www.mail-archive.com/u-boot-0aAXYlwwYIKGBzrmiIFOJg@public.gmane.org/msg86475.html

Rob

As for the default behavior, this becomes a board config issue, not a
U-Boot issue.

Regarding the patch, as a bugfix it will go in u-boot-arm/master
for 2012.07.

With all this, do we have the overall issue covered?

Amicalement,
-- 
Albert.