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 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.
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 _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
