lkml.org 
[lkml]   [2013]   [Apr]   [27]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH v2] PowerPC: kernel: compiling issue, make additional room in exception vector area
On 2013年04月26日 11:54, Mike Qiu wrote:
> 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 �:
>>>>>>>> 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.

I think the diff v2 is correct, but is not the best one for this issue.

I prefer the Paul's patch for this issue which has better performance

:-)


Thanks.

--
Chen Gang

Flying Transformer
--
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/

\
 
 \ /
  Last update: 2013-04-27 12:01    [W:0.057 / U:3.332 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site