From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from e1.ny.us.ibm.com ([32.97.182.141]) by canuck.infradead.org with esmtps (Exim 4.76 #1 (Red Hat Linux)) id 1QSStS-0003KJ-Hn for kexec@lists.infradead.org; Fri, 03 Jun 2011 11:50:23 +0000 Received: from d01relay01.pok.ibm.com (d01relay01.pok.ibm.com [9.56.227.233]) by e1.ny.us.ibm.com (8.14.4/8.13.1) with ESMTP id p53BclMW015567 for ; Fri, 3 Jun 2011 07:38:47 -0400 Received: from d01av02.pok.ibm.com (d01av02.pok.ibm.com [9.56.224.216]) by d01relay01.pok.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id p53BoH97121728 for ; Fri, 3 Jun 2011 07:50:17 -0400 Received: from d01av02.pok.ibm.com (loopback [127.0.0.1]) by d01av02.pok.ibm.com (8.14.4/8.13.1/NCO v10.0 AVout) with ESMTP id p53BoHAq006892 for ; Fri, 3 Jun 2011 08:50:17 -0300 Message-ID: <4DE8CA76.2060303@in.ibm.com> Date: Fri, 03 Jun 2011 17:20:14 +0530 From: Suzuki Poulose MIME-Version: 1.0 Subject: Re: [RFC][PATCH] Kexec support for PPC440x References: <4DE345B0.8020505@in.ibm.com> <4DE50617.7090509@linutronix.de> <4DE72EFE.8080502@in.ibm.com> In-Reply-To: <4DE72EFE.8080502@in.ibm.com> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Sender: kexec-bounces@lists.infradead.org Errors-To: kexec-bounces+dwmw2=twosheds.infradead.org@lists.infradead.org To: Sebastian Andrzej Siewior Cc: linux ppc dev , "kexec@lists.infradead.org" , lkml On 06/02/11 12:04, Suzuki Poulose wrote: > On 05/31/11 20:45, Sebastian Andrzej Siewior wrote: >> >> Suzuki Poulose wrote: >>> Index: powerpc/arch/powerpc/kernel/44x_kexec_mapping.S >>> =================================================================== >>> --- /dev/null >>> +++ powerpc/arch/powerpc/kernel/44x_kexec_mapping.S >> .... >> >>> + * >>> + */ >>> + bl nxtins /* Find our address */ >>> +nxtins: mflr r5 /* Make it accessible */ >> >> Please don't mix labels and instructions. > OK. >> >>> + tlbsx r23,0,r5 /* Find entry we are in */ >> >> using tabs instead of spaces would make it look nice. Please also separate the arguments of the instruction i.e. >> tlbsx r23, 0, r5 > > Sure. >> >> >>> Index: powerpc/arch/powerpc/kernel/misc_32.S >>> =================================================================== >>> --- powerpc.orig/arch/powerpc/kernel/misc_32.S >>> +++ powerpc/arch/powerpc/kernel/misc_32.S >>> @@ -736,6 +736,28 @@ relocate_new_kernel: >>> mr r5, r31 >>> >>> li r0, 0 >>> +#elif defined(CONFIG_44x) && !defined(CONFIG_47x) >>> + >>> + mr r29, r3 >>> + mr r30, r4 >>> + mr r31, r5 >>> + >>> +#include "44x_kexec_mapping.S" >> >> The way you setup the 1:1 mapping should be close to what you are doing on >> kernel entry.Isn't it possible to include the file here and in the entry >> code? > I will make this change and resend the patch. I took a look at the way we do it at kernel entry. It looks more cleaner to leave it untouched. Especially, when we add the support for 47x in the future, the code will become more unreadable. What do you think ? Thanks Suzuki > > Thanks > > Suzuki > _______________________________________________ > Linuxppc-dev mailing list > Linuxppc-dev@lists.ozlabs.org > https://lists.ozlabs.org/listinfo/linuxppc-dev _______________________________________________ kexec mailing list kexec@lists.infradead.org http://lists.infradead.org/mailman/listinfo/kexec