PPC to PowerPC Migration

Darcy Watkins DWatkins at tranzeo.com
Thu Jun 12 03:15:03 EST 2008

Hi Josh,

I think it would be more helpful if I were to tidy it a bit and add AMCC
Taihu boot support to it first.  Then submit it.  People are more likely
to have access to a Taihu than one of our boards.

What I mean by "AMCC Taihu boot support" is that the board would come up
just like our Taihushui/Kolsch family of boards, but would not include
the extra drivers, etc needed for USB gadgets, the LCD and other like
items that are on the AMCC board.

Once I get this done, I can submit BSP patch sets for kernel 2.6.25 and
2.6.26.  If there is demand, I could submit a BSP patch set for 2.6.24
as well.

Please send me (or URL to) summarized patch submission instructions /



-----Original Message-----
From: Josh Boyer [mailto:jwboyer at gmail.com] On Behalf Of Josh Boyer
Sent: Wednesday, June 11, 2008 9:33 AM
To: Darcy Watkins
Cc: vb; Mike Timmons; Andy Schmidt; linuxppc-embedded at ozlabs.org
Subject: Re: PPC to PowerPC Migration

On Wed, 11 Jun 2008 07:38:44 -0700
"Darcy Watkins" <DWatkins at tranzeo.com> wrote:

> Hello,
> I recently migrated an AMCC PPC405EP system from arch/ppc to
> arch/powerpc and found that in kernel 2.6.25, my board support patches
> have reduced to just the board support patches - approx 20k bytes in
> size (and one small one-line fix needed when using RT Preemption
> kernel).  Compare this with 2.6.24 and earlier where I had to apply
> patches to complete the PPC405EP and/or arch/powerpc support.
>    Prior to 2.6.23 had to use non kernel.org kernel sources and
> arch/ppc.
>    2.6.23 --> patch file size 400k+
>    2.6.24 --> patch file size ~80k
>    2.6.25 --> patch file size ~20k
>    2.6.26 --> patch file size ~20k
> I think that with 2.6.25 (and upcoming 2.6.26) this means that 4xx is
> ready for prime time in arch/powerpc.

Did you post your patch for your board port?  If not, please do.  If
so, kindly point me to it so I can look at merging it into mainline?


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