linux-kernel - Re: [PATCH v2] PowerPC: kernel: compiling issue, make additional room in exception vector area

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Message-ID: <5179E11F.8010007@asianux.com>
Date:	Fri, 26 Apr 2013 10:06:23 +0800
From:	Chen Gang <gang.chen@...anux.com>
To:	Mike Qiu <qiudayu@...ux.vnet.ibm.com>
CC:	Michael Neuling <mikey@...ling.org>,
	Paul Mackerras <paulus@...ba.org>,
	Michael Ellerman <michael@...erman.id.au>,
	linuxppc-dev@...ts.ozlabs.org, sfr@...b.auug.org.au,
	matt@...abs.org, linux-kernel@...r.kernel.org,
	"Aneesh Kumar K.V" <aneesh.kumar@...ux.vnet.ibm.com>
Subject: Re: [PATCH v2] PowerPC: kernel: compiling issue, make additional
 room in exception vector area

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)

:-)

-- 
Chen Gang

Asianux Corporation
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