On Apr 1, 2009, at 8:36 AM, Eduard Fuchs wrote:

Hi,

Am Mittwoch 01 April 2009 06:10:36 schrieb Kumar Gala:

quoted

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

quoted

Hi,

Am Dienstag 31 M=E4rz 2009 15:20:21 schrieb Kumar Gala:

quoted

On Mar 31, 2009, at 5:15 AM, Eduard Fuchs wrote:

quoted

Hi,

I'm testing the evaluation board from freescale (MPC8641DHPCN) =20
with
the latest
linux kernel (2.6.29) and the second core seems disabled. =20
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-=20
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?

It appears we introduced a bug in v2009.03 of u-boot.

I never thought that the problem could be in u-boot. I tested the =20
board with
u-boot v2009.01 and it works well.

the u-boot bug is that we are over-writting the page of code we need =20
to bring up the second core.  Thus when the kernel releases the 2nd =20
core it goes off in the weeds.

I've sent some patches to the u-boot list that should fix the problem =20=

by making sure that u-boot avoids using the page of memory we need for =20=

the 2nd core.

- k=