On 2013年04月26日 11:54, Mike Qiu wrote:

于 2013/4/26 11:42, Chen Gang 写道:

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On 2013年04月26日 11:25, Chen Gang wrote:

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On 2013年04月26日 11:08, Mike Qiu wrote:

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于 2013/4/26 10:06, Chen Gang 写道:

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On 2013年04月26日 10:03, Mike Qiu wrote:

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�� 2013/4/26 9:36, Chen Gang �:

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On 2013��04��26�� 09:18, Chen Gang wrote:

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On 2013��04��26�� 09:06, Chen Gang wrote:

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CFAR is the Come From Register.  It saves the location of the
last

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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