[U-Boot] [PATCH] arm: vf610: move device tree after kernel image

[Albert ARIBAUD]

Hello Stefan,

On Wed, 14 Oct 2015 10:45:57 -0700, Stefan Agner <stefan at agner.ch>
wrote:
> On 2015-10-14 01:36, Albert ARIBAUD wrote:
> > Hello Stefan,
> > 
> > On Tue, 13 Oct 2015 23:11:45 -0700, Stefan Agner <stefan at agner.ch>
> > wrote:
> >> Since the device tree relocation is disabled (fdt_high set to
> >> 0xffffffff), U-Boot keeps the device tree at its load address
> >> 0x81000000. The kernel uncompresses itself to 0x80008000 by
> >> default, hence this limits the maximum (uncompressed) kernel
> >> size to somewhat below 16MiB, otherwise the device tree gets
> >> overwritten by the kernel data...
> >>
> >> Move the device tree load address to 0x84000000 to avoid that
> >> the device tree being overwritten by the kernel.
> > 
> > OOC, why is device tree relocation disabled? I'm asking because by
> > manually placing the device tree (or anything else) high in DDR, one
> > runs the risk of overwriting some of U-Boot's data.
> 
> I guess this has been done for Cortex-M4 firmwares running from DDR. As
> Tom pointed out, this can be archived in a nicer way using bootm_size.

Thanks -- I've just seen Tom's answer. I guess I'll update pcm052
too...

> Stefan

Amicalement,
-- 
Albert.