[U-Boot-Users] PPC 8260 Linux boot

Ori Idan ori at helicontech.co.il
Wed Jul 28 00:27:11 CEST 2004


>I repeat:
>
>Do you see any messages when you do a post mortem dump of the log_buf
>memory?
>[See http://www.denx.de/twiki/bin/view/DULG/LinuxPostMortemAnalysis]
>
>????
>  
>
I think I don't understand something in your explenation of post mortem, 
how can I do
grep log_buf system.map
when I have nothing but UBOOT prompt?

>  
>
>>I tried removing all my code and tried again, that was the first thing I 
>>thought
>>that maybe I crash the system.
>>I tried again and again and the problem was the same.
>>    
>>
>
>You cannot make such a claim. The _symptoms_ may have been the  same.
>The problem may have been a different one.
>
>  
>
>>>2) Check your memory map, and the init sequence of  your  SDRAM  [no,
>>>  I'm not going to explain this here again. Search the archives.]
>>> 
>>>
>>>      
>>>
>>Unfortunatly the archives are not searchable, otherwise that would be 
>>the first thing I would
>>    
>>
>
>The GMANE archive _is_ searchable.
>  
>
What is the GNAME archive?

>  
>
>>do, could you give me some hints on what do you mean init sequence of SDRAM?
>>    
>>
>
>IO mean the initialization sequence that is required  for  the  SDRAM
>chips. In 98% of all porting problems this is the culprit.
>  
>
I still do not understand what do you mean by init sequence of SDRAM, If 
I had any hint of what you mean by that I would check for it.
All I know is that I have 128MB of RAM mapped from 0x0000 I have checked 
it again.

>Did you read the FAQ? How about the "clocks_in_mhz" setting?  Or  the
>bd_info structure used by the Linux kernel?
>  
>
Yes, I have thought about the clock value and made sure it is passed Ok, 
since I am using
kernel 2.4.25 I understand that the clock should be in Hz and that is 
what U-boot transfers.

--
Ori Idan





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