From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Gerhard Pircher <gerhard_pircher@gmx.net>
Cc: linuxppc-dev@ozlabs.org
Subject: Re: [RFC] Porting AmigaOne platform code from ppc to powerpc
Date: Sun, 22 Oct 2006 09:51:32 +1000 [thread overview]
Message-ID: <1161474692.10524.266.camel@localhost.localdomain> (raw)
In-Reply-To: <20061019132423.270440@gmx.net>
On Thu, 2006-10-19 at 15:24 +0200, Gerhard Pircher wrote:
> Hi!
>
> I'm working on the AmigaOne Linux kernel port. The AmigaOne is a G3/G4 desktop system and makes use of U-boot v1.1.0 as firmware. I intend to port the current code base of this platform to the powerpc architecture, but I'm not sure how to address this.
>
> The "problem" is the device tree required by the powerpc architecture. The AmigaOne's U-boot version doesn't support the flattened device tree yet and also requires a special flash rom programmer tool (I guess it adds some sort of dongle code to the flash rom content). Otherwise users won't be able to boot AmigaOS4. Thus using a newer U-boot version is not really an option and AFAIK the OS4 developers are not going to update their U-boot version.
>
> Well, some time ago I read about a CUIMAGE target that can be used to get powerpc-arch kernels working on old U-boot versions by using a precompiled/static device tree. I don't think that this approch makes sense for a desktop platform, which uses different CPUs (750FX, 750GX, 7410, 7450, 7455, etc..), PCI/AGP cards, etc.
>
> Any advice for me in this case?
You can also look at the rework being done currently on zImage wrappers.
Among others, they have the ability to embed a device-tree.
Ben.
next prev parent reply other threads:[~2006-10-21 23:51 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-06-28 20:27 Re: [Alsa-devel] RFC: dma_mmap_coherent() for powerpc/ppc architecture and ALSA? Gerhard Pircher
2006-06-29 9:27 ` Takashi Iwai
2006-06-29 21:15 ` Gerhard Pircher
2006-06-30 9:12 ` Takashi Iwai
2006-06-30 18:21 ` Gerhard Pircher
2006-10-19 13:24 ` [RFC] Porting AmigaOne platform code from ppc to powerpc Gerhard Pircher
2006-10-21 23:51 ` Benjamin Herrenschmidt [this message]
2006-10-23 18:57 ` Crash with highmem support enabled Gerhard Pircher
2006-10-25 5:34 ` Paul Mackerras
2006-10-25 7:45 ` Gerhard Pircher
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