From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Thu, 25 Jul 2002 21:17:13 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Thu, 25 Jul 2002 21:17:13 -0400 Received: from pacific.moreton.com.au ([203.143.238.4]:32498 "EHLO dorfl.internal.moreton.com.au") by vger.kernel.org with ESMTP id ; Thu, 25 Jul 2002 21:17:12 -0400 Message-ID: <3D40A3E4.9050703@snapgear.com> Date: Fri, 26 Jul 2002 11:20:36 +1000 From: Greg Ungerer Organization: SnapGear User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.0.0) Gecko/20020529 X-Accept-Language: en-us, en MIME-Version: 1.0 To: David Woodhouse CC: linux-kernel@vger.kernel.org, David McCullough Subject: Re: [PATCH]: uClinux (MMU-less) patches against 2.5.28 References: <3D3FA130.6020701@snapgear.com> <9309.1027608767@redhat.com> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Hi David, >David Woodhouse wrote: > > gerg@snapgear.com said: > > > > A new set of uClinux (MMU-less) patches agains 2.5.28. You can get it at: > > > > http://www.uclinux.org/pub/uClinux/uClinux-2.5.x/linux-2.5.28uc0.patch.gz > > > > > > Perhaps drop drivers/block/blkmem.c or justify reinventing the wheel? > > Indeed. That blkmem driver is a complete mess. > I can't think of any justification for it existing :-) > I'll work on cleaning that out. You may have noticed some MAGIC_ROM_PTR patches in the mtd driver code in this patch. This is to allow XIP for applications. We have been support XIP for quite some time on uClinux, it works really well. A problem we have experienced with MTD is that the nature of asynchronous writing to FLASH does not play nice with apps runing XIP. Any thoughts on how to deal with this? (blkmem does synchronous writes so it doesn't suffer any problem. It just locks everyone out for an in-ordinate amount of time while it does the FLASH write). Regards Greg ------------------------------------------------------------------------ Greg Ungerer -- Chief Software Wizard EMAIL: gerg@snapgear.com SnapGear Pty Ltd PHONE: +61 7 3435 2888 825 Stanley St, FAX: +61 7 3891 3630 Woolloongabba, QLD, 4102, Australia WEB: www.snapgear.com