Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759865Ab3DZDzI (ORCPT ); Thu, 25 Apr 2013 23:55:08 -0400 Received: from e28smtp05.in.ibm.com ([122.248.162.5]:47801 "EHLO e28smtp05.in.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758331Ab3DZDzF (ORCPT ); Thu, 25 Apr 2013 23:55:05 -0400 Message-ID: <5179FA8E.9090501@linux.vnet.ibm.com> Date: Fri, 26 Apr 2013 11:54:54 +0800 From: Mike Qiu User-Agent: Mozilla/5.0 (Windows NT 6.2; WOW64; rv:17.0) Gecko/20130328 Thunderbird/17.0.5 MIME-Version: 1.0 To: Chen Gang CC: Michael Neuling , Paul Mackerras , Michael Ellerman , linuxppc-dev@lists.ozlabs.org, sfr@canb.auug.org.au, matt@ozlabs.org, linux-kernel@vger.kernel.org, "Aneesh Kumar K.V" Subject: Re: [PATCH v2] PowerPC: kernel: compiling issue, make additional room in exception vector area References: <5177965D.9090406@linux.vnet.ibm.com> <20130424083142.GB26834@concordia> <51779941.8080403@linux.vnet.ibm.com> <30651.1366799858@ale.ozlabs.ibm.com> <1366807638.5911.2.camel@localhost> <5178816D.3000309@asianux.com> <5178ABA2.4030109@linux.vnet.ibm.com> <20130425062539.GA421@iris.ozlabs.ibm.com> <517918AB.4020508@asianux.com> <30269.1366931768@ale.ozlabs.ibm.com> <5179D302.9060203@asianux.com> <5179D5D8.8080102@asianux.com> <5179DA23.8000407@asianux.com> <5179E056.2000709@linux.vnet.ibm.com> <5179E11F.8010007@asianux.com> <5179EFB6.3090602@linux.vnet.ibm.com> <5179F39C.5020408@asianux.com> <5179F7B8.5010701@asianux.com> In-Reply-To: <5179F7B8.5010701@asianux.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-TM-AS-MML: No X-Content-Scanned: Fidelis XPS MAILER x-cbid: 13042603-8256-0000-0000-00000739B621 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2314 Lines: 61 于 2013/4/26 11:42, Chen Gang 写道: > On 2013年04月26日 11:25, Chen Gang wrote: >> On 2013年04月26日 11:08, Mike Qiu wrote: >>> 于 2013/4/26 10:06, Chen Gang 写道: >>>> On 2013年04月26日 10:03, Mike Qiu wrote: >>>>> �� 2013/4/26 9:36, Chen Gang д��: >>>>>>> On 2013��04��26�� 09:18, Chen Gang wrote: >>>>>>>>> On 2013��04��26�� 09:06, Chen Gang wrote: >>>>>>>>>>>>> CFAR is the Come From Register. It saves the location of the >>>>>>>>>>>>> last >>>>>>>>>>>>>>> branch and is hence overwritten by any branch. >>>>>>>>>>>>>>> >>>>>>>>>>> Do we process it just like others done (e.g. 0x300, 0xe00, >>>>>>>>>>> 0xe20 ...) ? >>>>>>>>>>> . = 0x900 >>>>>>>>>>> .globl decrementer_pSeries >>>>>>>>>>> decrementer_pSeries: >>>>>>>>>>> HMT_MEDIUM_PPR_DISCARD >>>>>>>>>>> SET_SCRATCH0(r13) >>>>>>>>>>> b decrementer_pSeries_0 >>>>>>>>>>> >>>>>>>>>>> ... >>>>>>>>>>> >>>>>>>>>>> >>>>>>> Oh, it seems EXCEPTION_PROLOG_1 will save the regesters which related >>>>>>> with CFAR, so I think need move EXCEPTION_PROLOG_1 to near 0x900. >>>>> I will try your diff V2, to see if the machine can boot up >>>> OK, thanks. (hope it can work) >>> It seems that the machine can be bootup in powernv mode, but I'm not >>> sure if my machine call that module. >>> >>> At lease my machine can boot up > Please reference commit number: 1707dd161349e6c54170c88d94fed012e3d224e3 > (1707dd1 powerpc: Save CFAR before branching in interrupt entry paths) > > What our diff v2 has done is just the fix for our patch v2 (just like > the commit 1707dd1 has done). > > Please check, thanks. > > :-) I will check this evening or tomorrow, I have something else to do this afteroon. >> Thank you for your information ! >> >> I have checked the disassemble by powerpc64-linux-gnu-objdump, it seems >> all we have done for 0x900 is almost like the original done for 0x200. >> >> I am just learning about the CFAR (google it), And I plan to wait for a >> day, if all things go smoothly, I will send patch v3. >> >> >> :-) >> > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/