8641D with linux 2.6.29 did'n show second cpu

Becky Bruce beckyb at kernel.crashing.org
Wed Apr 1 07:04:17 EST 2009

On Mar 31, 2009, at 10:06 AM, Eduard Fuchs wrote:

> Hi,
> Am Dienstag 31 März 2009 15:20:21 schrieb Kumar Gala:
>> On Mar 31, 2009, at 5:15 AM, Eduard Fuchs wrote:
>>> Hi,
>>> I'm testing the evaluation board from freescale (MPC8641DHPCN) with
>>> the latest
>>> linux kernel (2.6.29) and the second core seems disabled. CONFIG_SPM
>>> is
>>> enabled but the /proc/cpuinfo shows only one cpu. With original
>>> 2.6.27 kernel
>>> both cpu cores appears in /proc/cpuinfo.
>>> Has anyone an idea how can i enable the second core?
>> Are you using u-boot?  I can't remember if you need a newer u-boot to
>> deal with changes in how we bring up the second core.
> Yes. My u-boot version is 2009.03. Are there some additional config  
> keys for
> SMP support in u-boot?

Hrm, I am able to reproduce this here - the second processor is  
reported as stuck and once we're booted, I only see one CPU online.   
Let me poke around and see if I can figure out what's going on here.


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