Messages in this thread | | | Date | Fri, 26 Apr 2013 11:54:54 +0800 | From | Mike Qiu <> | Subject | Re: [PATCH v2] PowerPC: kernel: compiling issue, make additional room in exception vector area |
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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. >> Thank you for your information ! >> >> I have checked the disassemble by powerpc64-linux-gnu-objdump, it seems >> all we have done for 0x900 is almost like the original done for 0x200. >> >> I am just learning about the CFAR (google it), And I plan to wait for a >> day, if all things go smoothly, I will send patch v3. >> >> >> :-) >> >
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