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Date:      Sun, 10 Feb 2013 23:22:07 -0700
From:      Warner Losh <imp@bsdimp.com>
To:        Tim Kientzle <tim@kientzle.com>
Cc:        freebsd-arm@freebsd.org
Subject:   Re: building RaspPi Images
Message-ID:  <8454CB00-22D2-40ED-AAE3-51C1AF28463A@bsdimp.com>
In-Reply-To: <67660AAE-0489-40F1-9729-FF2F0C631DF8@kientzle.com>
References:  <5116CB50.9080303@ceetonetechnology.com> <7757848F-45C6-4DEF-A4A2-5F900EB10A06@kientzle.com> <20130210012052.4d7e1a46@ivory.local> <58DCA6BE-8C06-4F69-81A2-A3582FBB5B12@kientzle.com> <E691571B-EA19-4485-BB02-7486685B44C7@bsdimp.com> <EB4A0D67-9813-47DA-B3DB-F1309B2773F5@kientzle.com> <8087503F-BE98-45B9-888B-044D9DA58B80@bsdimp.com> <20130210212025.009ee482@bender> <ADEA1B10-6C17-43C8-B364-8819593D312E@bsdimp.com> <1339E085-2B31-485D-9EED-9D0AFB7664C5@kientzle.com> <7F7AE905-7A08-48EE-8905-8D688266739A@bsdimp.com> <67660AAE-0489-40F1-9729-FF2F0C631DF8@kientzle.com>

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On Feb 10, 2013, at 11:11 PM, Tim Kientzle wrote:

>>=20
>>>> The stand alone interface should, in theory, provide us with the =
DTB, but the code that is in ubldr doesn't seem to be reliably getitng =
this image.
>>>=20
>>> I don't think anyone has spent time on this.  We've
>>> just been focused on "making it work" and the compiled-in
>>> DTB does work for any single board.
>>=20
>> Ah, that makes sense. I just know the theory, not the practice.  I =
haven't had time for armv6 stuff=85
>=20
> I started taking a look at this tonight.  It appears
> we can get the FDT through the U-Boot API.

Cool!

> In particular, U-Boot exposes an environment
> variable "fdtaddr" with the address of the FDT
> blob in memory.  The attached (entirely untested)
> patch might do the trick.

That's really cool!  It looks good to me, but I don't know how well the =
docs match the code :)

> Hopefully I'll have time this week to rebuild all
> the boot bits and test this.
>=20
> Cheers,
>=20
> Tim
>=20
> <t.diff>
>=20




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