From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.humboldt.co.uk (mail.humboldt.co.uk [80.68.93.146]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTP id A03C9679F7 for ; Fri, 3 Mar 2006 20:57:41 +1100 (EST) Subject: Re: Linux on PPC From: Adrian Cox To: David Hawkins In-Reply-To: <4407CFD3.4060206@ovro.caltech.edu> References: <190edfbd0603021801g5505cab9h8e285fdc7bf476d1@mail.gmail.com> <4407CFD3.4060206@ovro.caltech.edu> Content-Type: text/plain Date: Fri, 03 Mar 2006 09:33:24 +0000 Message-Id: <1141378405.8912.31.camel@localhost.localdomain> Mime-Version: 1.0 Cc: linuxppc-embedded@ozlabs.org List-Id: Linux on Embedded PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , On Thu, 2006-03-02 at 21:10 -0800, David Hawkins wrote: > Step 2. Find a PPC 750 port in the Linux source. > > For example, in the 2.6 series kernel, the place to start > looking is under arch/ppc/platforms. grep -Ie 750 shows > up some of the PPC 750 based systems. > > chestnut.c 750FX/GX evaluation board > katana.c Looks like one too > prpmc750.c Looks like a Motorola board > > Look at the comments in the code, look at the memory map > of the reference board versus your custom board. There is > a very good chance that the custom board is based on a > reference design - thats the whole point of them. I'd add the caution that within the 6xx, 7xx, and 7xxx family of processors, the north-bridge makes a much greater difference than the processor core. Within that family of processors Linux will auto-detect the processor specific features at boot time. It will be easier to port from a board using a 7450 with the same north-bridge, than from a board using a 750 with a different north-bridge. -- Adrian Cox