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

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Message-ID: <5179EFB6.3090602@linux.vnet.ibm.com>
Date:	Fri, 26 Apr 2013 11:08:38 +0800
From:	Mike Qiu <qiudayu@...ux.vnet.ibm.com>
To:	Chen Gang <gang.chen@...anux.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

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

Thanks
Mike
>
> :-)
>

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