Booting 2.6.29-rc3 on mpc8661d_hpcn failing

[Kumar Gala]

On Feb 2, 2009, at 10:00 AM, Martyn Welch wrote:

> Kumar Gala wrote:
>> On Feb 2, 2009, at 3:36 AM, Martyn Welch wrote:
>>> Becky Bruce wrote:
>>>> On Jan 30, 2009, at 8:42 AM, Kumar Gala wrote:
>>>>>
>>>>> On Jan 30, 2009, at 6:31 AM, Martyn Welch wrote:
>>>>>
>>>>>> Hi Guys,
>>>>>>
>>>>>> It seems that 2.6.29-rc3 is not booting on the MPC8641 HPCN. I  
>>>>>> have just updated u-boot to the latest git to see if that  
>>>>>> improved matters, however I get stuck at the following. Any  
>>>>>> ideas?
>>>>>
>>>>> did you update your .dtb as well?
>>>
>>> Yup, just double checked it. SOC mapped at ffe00000. If I use the  
>>> wrong DTB I don't get any serial output...
>>>
>>>> We've changed the memory map for that board in the latest u-boot,  
>>>> which is why you need a new .dtb.  If this still failing, let me  
>>>> know, and I'll give it a try on my board and see what's up since  
>>>> this is probably my fault :)
>>>
>>> It appears the same problem is affecting our sbc610 as well, the  
>>> location of the SOC hasn't changed on that board.
>>>
>>> Martyn
>> Hm.. maybe try a git-bisect between 2.6.28 and 2.6.29-rc3?
>
> That's was today's "little" task. I was just in the process of  
> writing an email :-)
>
> It got me to the following commit:
>
> commit 64b3d0e8122b422e879b23d42f9e0e8efbbf9744
> Author: Benjamin Herrenschmidt <benh at kernel.crashing.org>
>
>   powerpc/mm: Rework usage of _PAGE_COHERENT/NO_CACHE/GUARDED
>
> I tried reverting it, but as I had kinda thought, that really didn't  
> help.
>
> I'm just recompiling to check that I didn't screw-up during the  
> bisection.

Hmm.

take a look at this thread.

http://ozlabs.org/pipermail/linuxppc-dev/2009-January/067437.html

- k