From: Clemens Koller <clemens.koller@anagramm•de>
To: fabien <fabien.fb@gmail•com>
Cc: linuxppc-embedded@ozlabs•org
Subject: Re: ppcboot and powerpc branch question
Date: Fri, 30 Nov 2007 16:09:45 +0100 [thread overview]
Message-ID: <475027B9.4060804@anagramm.de> (raw)
In-Reply-To: <f8f856500711300533t3bad1c1dxb4ff137534acbccb@mail.gmail.com>
fabien schrieb:
> hi all,
>
> After some problem with my custom board and kernel 2.6.19 about the
> init process, i've moved
> on 2.6.23 and that had fixed my problems. (related to this post :
> http://marc.info/?l=linuxppc-embedded&m=119609022221017&w=2)
> Apparently it was a problem with cpm_uart on SMC1.
> (http://lkml.org/lkml/2007/9/23/99)
> the patch have been integrated in 2.6.23. Now i use this kernel and
> busybox works.
> I want to migrated my board in powerpc branch instead of ppc (i plan
> to use xenomai but in 2.6.23
> there is only an adeos patch for piowerpc branch), but i see the use
> of a device tree
> instead of bd_t struct. I'm a bit disappointed because i also see that
> older u-boot (in my case
> ppcboot 1.1.5) aren't capable to pass dts to kernel.
> Is there a way to keep my old bootloader to boot a powerpc branch kernel ?
please read linux/Documentation/powerpc/booting-without-of.txt
To get a cuImage, you
- need to adjust your <platform>.dts and configure your kernel to use it.
- need the latest dtc (device tree compiler),
- need the latest mkimage (from the latest u-boot tree)
- and build your cuImage by building the target zImage (make zImage)
-> your cuImage then rests in i.e. arch/powerpc/boot/cuImage.<platform>
Aside of no good documentation, I ran into the problem that the
embedded device tree doesn't get updated by the bd_t struct properly
(the mac addresses) in the latest versions of the kernel. This might be
a bug or a configuration error on my side. I didn't check yet.
U-Boot with full device tree support will hopfully fix that, when it's
out.
Regards,
--
Clemens Koller
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next prev parent reply other threads:[~2007-11-30 15:09 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-11-30 13:33 ppcboot and powerpc branch question fabien
2007-11-30 13:43 ` Grant Likely
2007-11-30 14:45 ` fabien
2007-11-30 15:04 ` Scott Wood
2007-11-30 15:09 ` Clemens Koller [this message]
2007-11-30 15:57 ` fabien
2007-11-30 22:15 ` Wolfgang Denk
2007-11-30 22:25 ` Pagnotta, Chris
2007-11-30 23:10 ` Cannot login via tinylogin on sequoia Leonid
2007-12-03 20:25 ` Leonid
2007-12-01 22:54 ` ppcboot and powerpc branch question Wolfgang Denk
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