[U-Boot] bootm not taking dtb

[JR Rivers]

On Jan 11, 2012, at 6:45 PM, Aggrwal Poonam-B10812 wrote:

> 
> 
>> -----Original Message-----
>> From: u-boot-bounces at lists.denx.de [mailto:u-boot-bounces at lists.denx.de]
>> On Behalf Of JR Rivers
>> Sent: Thursday, January 12, 2012 6:49 AM
>> To: u-boot at lists.denx.de
>> Subject: Re: [U-Boot] bootm not taking dtb
>> 
>> 
>> Ping
>> 
>> On Jan 11, 2012, at 1:47 PM, JR Rivers wrote:
>> 
>>> 
>>> I am working with a powerpc embedded system where u-boot seems to be
>> passing in a constructed fdt (or one embedded in u-boot) as opposed to
>> one that is either passed directly to bootm or as the third image of a
>> multi-file image.
>>> 
>>> I'm sure sure that the system is NOT using my dtb file because I
>> modified the my linux platform file to print out the "model" and
>> "compatible" properties of root, and they make sense, but are not the
>> values that I pass in with my dtb.
>>> 
>>> I've tried "bootm ${kerneladdr} - ${dtbaddr}" for nfs boot, and I've
>> constructed a multi-file uImage with kernel:initramfs:dtb.  The behavior
>> is the same in all cases.  Is this expected behavior, and if so, is there
>> some way to force u-boot to use my dtb file?
> Did you check that $(dtb_addr) is same as the location where your dtb is there.
> I know this is trivial question I am asking.
> Also can you specify which board and which u-boot version. I am assuming you are talking about Denx top of tree.

In the first case, yes, I'm quite sure... in fact uboot start off indicating that it's using my dtb, but it doesn't actually use it (per the evidence above).

## Flattened Device Tree blob at 09000000
   Booting using the fdt blob at 0x9000000
   Uncompressing Kernel Image ... OK
   Loading Device Tree to 007fc000, end 007ffa53 ... OK

The second case (where the DTB is included as the third component of a multi-file image) indicates that there isn't an addressing problem.

The uboot version is... U-Boot 2009.06 (Apr 19 2011 - 12:54:10).  It came with the system and we're loading a new kernel/rootfs on to it.

>>> 
>>> Thanks,
>>> 
>>> JR
>>> 
>>> 
>>> 
>>> 
>>> 
>>> 
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