From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from e28smtp01.in.ibm.com (e28smtp01.in.ibm.com [122.248.162.1]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client CN "e28smtp01.in.ibm.com", Issuer "GeoTrust SSL CA" (not verified)) by ozlabs.org (Postfix) with ESMTPS id 3DB2A2C00C2 for ; Fri, 26 Apr 2013 13:55:05 +1000 (EST) Received: from /spool/local by e28smtp01.in.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Fri, 26 Apr 2013 09:20:05 +0530 Received: from d28relay05.in.ibm.com (d28relay05.in.ibm.com [9.184.220.62]) by d28dlp01.in.ibm.com (Postfix) with ESMTP id 79973E0053 for ; Fri, 26 Apr 2013 09:27:06 +0530 (IST) Received: from d28av01.in.ibm.com (d28av01.in.ibm.com [9.184.220.63]) by d28relay05.in.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id r3Q3sur17733702 for ; Fri, 26 Apr 2013 09:24:56 +0530 Received: from d28av01.in.ibm.com (loopback [127.0.0.1]) by d28av01.in.ibm.com (8.14.4/8.13.1/NCO v10.0 AVout) with ESMTP id r3Q3sxsi012686 for ; Fri, 26 Apr 2013 03:55:00 GMT Message-ID: <5179FA8E.9090501@linux.vnet.ibm.com> Date: Fri, 26 Apr 2013 11:54:54 +0800 From: Mike Qiu MIME-Version: 1.0 To: Chen Gang 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 Cc: sfr@canb.auug.org.au, Michael Neuling , matt@ozlabs.org, linux-kernel@vger.kernel.org, Paul Mackerras , "Aneesh Kumar K.V" , linuxppc-dev@lists.ozlabs.org List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , 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. >> >> >> :-) >> >