From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965370Ab1KJQzE (ORCPT ); Thu, 10 Nov 2011 11:55:04 -0500 Received: from ch1ehsobe003.messaging.microsoft.com ([216.32.181.183]:21285 "EHLO ch1outboundpool.messaging.microsoft.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S965350Ab1KJQzA (ORCPT ); Thu, 10 Nov 2011 11:55:00 -0500 X-SpamScore: -12 X-BigFish: VS-12(zz9371K1432N98dKzz1202hzzz2dh2a8h668h839h944h) X-Forefront-Antispam-Report: CIP:70.37.183.190;KIP:(null);UIP:(null);IPVD:NLI;H:mail.freescale.net;RD:none;EFVD:NLI X-FB-SS: 13, Date: Thu, 10 Nov 2011 10:54:55 -0600 From: Scott Wood To: Kumar Gala CC: "Moffett, Kyle D" , "linuxppc-dev@lists.ozlabs.org" , "linux-kernel@vger.kernel.org" , Timur Tabi , Paul Gortmaker Subject: Re: [RFC PATCH 00/17] powerpc/e500: separate e500 from e500mc Message-ID: <20111110165455.GE11983@schlenkerla.am.freescale.net> References: <4E42AB6F.1050900@freescale.com> <1320883399-15911-1-git-send-email-Kyle.D.Moffett@boeing.com> <58FDDDA5-26C4-493B-A00D-81DD94A5C26A@kernel.crashing.org> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline In-Reply-To: <58FDDDA5-26C4-493B-A00D-81DD94A5C26A@kernel.crashing.org> User-Agent: Mutt/1.5.21 (2010-09-15) X-OriginatorOrg: freescale.com Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Nov 10, 2011 at 10:30:41AM -0600, Kumar Gala wrote: > On Nov 10, 2011, at 10:17 AM, Moffett, Kyle D wrote: > > Furthermore, it looks like there are a couple issues here I missed > > before. PPC64 systems all appear to have an L1_CACHE_SHIFT of 7, > > except when you turn on the P5020DS board option which magically > > changes it to "6" and breaks lord-knows-what. I think my patch > > series actually "breaks" that and makes e5500 use 7 as well. > > a value of '6' on E5500 / P5020DS is correct and doesn't break anything. Setting it to 7 is wrong and thus the code is correct today. > > > Are you sure that a kernel built to support E5500 can also run on > > other 64-bit PowerPC/POWER systems? > > No it will not. There is not expectation of that as E5500 is an > embedded / Book-E class part and uses that ISA version. Book-S > (server) 64-bit machines are not OS compatible and we are not trying to > make them as such (but we do re-use a lot of code). What about other 64-bit book3e chips? What cache block size does A2 have? -Scott