AMCC 405ex memory size issue

AMCC 405ex memory size issue

[konamo]

Hi all,
  we are using u-boot 2009.01, linux-2.6.25-rc2, 1GB DDR2 memory(2Gbit * 4,
1 rank), AMCC powerpc 405ex, both 1G and 512MB memory works fine under
u-boot, but linux boot fails in 1G memory, if we limit mem=512M, linux could
boot. Could anyone pls help us how to find the root cause? thanks
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Re: AMCC 405ex memory size issue

[konamo]

any ideas?



konamo wrote:
> 
> Hi all,
>   we are using AMCC 405ex kilauea eval board as a demo, not use any
> pci/nand function, 
> the board configuration is below:
> u-boot 2009.01, 
> linux-2.6.25-rc2, 
> 1GB DDR2 memory(2Gbit * 4, 1 rank), 
> AMCC powerpc 405ex, 
> both 1G and 512MB memory works fine under u-boot, but linux boot fails in
> 1G memory, if we limit mem=512M, linux could boot over nfs. Could anyone
> pls help us how to find the root cause? thanks
> 

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Re: AMCC 405ex memory size issue

[Hunter Cobbs]

Have you modified the hardware?  The default hardware specs says there  
is only 256MB of ram. Regardless, if you upped the ram amount, you  
might need to modify u-boot itself to turn on more address lines or  
you might consider looking at your memory management allocation (slab,  
slub, etc).

Hunter Cobbs

On May 25, 2009, at 1:15 AM, konamo <dai.michael@gmail.com> wrote:

>
> any ideas?
>
>
>
> konamo wrote:
>>
>> Hi all,
>> we are using AMCC 405ex kilauea eval board as a demo, not use any
>> pci/nand function,
>> the board configuration is below:
>> u-boot 2009.01,
>> linux-2.6.25-rc2,
>> 1GB DDR2 memory(2Gbit * 4, 1 rank),
>> AMCC powerpc 405ex,
>> both 1G and 512MB memory works fine under u-boot, but linux boot  
>> fails in
>> 1G memory, if we limit mem=512M, linux could boot over nfs. Could  
>> anyone
>> pls help us how to find the root cause? thanks
>>
>
> -- 
> View this message in context: http://www.nabble.com/AMCC-405ex-memory-size-issue-tp23631525p23701685.html
> Sent from the linuxppc-dev mailing list archive at Nabble.com.
>
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