From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.kontron-modular.com (mail.kontron-modular.com [213.179.130.140]) by ozlabs.org (Postfix) with ESMTP id C12DDDDDEC for ; Wed, 22 Oct 2008 23:59:52 +1100 (EST) Message-ID: <48FF23C4.5030408@kontron.com> Date: Wed, 22 Oct 2008 14:59:48 +0200 From: =?ISO-8859-1?Q?R=E9gis_Odey=E9?= MIME-Version: 1.0 To: Kumar Gala Subject: Re: Extended Addressing Mode References: <48FEEB88.6050505@kontron.com> <83735324-C37B-4C57-A50F-FFF0D133E4E3@kernel.crashing.org> In-Reply-To: <83735324-C37B-4C57-A50F-FFF0D133E4E3@kernel.crashing.org> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Cc: linuxppc-dev@ozlabs.org List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Kumar Gala wrote: > > On Oct 22, 2008, at 3:59 AM, Régis Odeyé wrote: > >> Hello Everyone, >> I'm looking for some information about the Extended Addressing Mode >> (XAEN bit of HID0 register) of PPC32 support in Linux. >> I do not see anything in the main kernel tree but there may be some >> patches available ? >> Any information will be appreciate. >> Regards. > > There are patches from Becky Bruce that are going into 2.6.28. What > are you needing >32-bit for? There are some SW IO MMU changes that > are still pending to complete this work. > > - k We are developing a board based on Freescale 8641D which can get 4GB of ram. So I need 4GB+IOs (~1GB) of physical addressing space. My plan is to put a part of this ram above of 4GB to keep accesses to the IOs below the 4GB limit. It means non-contiguous ram addressing and XAEN features to be working. Where can I glance through Becky patches ? -- Régis ODEYE Kontron Modular Computers SA 150, rue M. Berthelot / ZI Toulon Est / BP 244 / Fr 83078 TOULON Cedex 9 Phone: (33) 4 98 16 34 86 Fax: (33) 4 98 16 34 01 E-mail: regis.odeye@kontron.com Web : www.kontron.com