[uClinux-dev] uClinux doesn't boot up on a board with ColdFireCPU. Help please.

Wang, Gang S gang.s.wang at intel.com
Thu Oct 20 21:05:54 EDT 2005


Thank you, David. I checked it, since my board requires MBAR to be at
40000000, and the value is just what I need, but uClinux still doesn't
boot up.

-----Original Message-----
From: uclinux-dev-bounces at uclinux.org
[mailto:uclinux-dev-bounces at uclinux.org] On Behalf Of David McCullough
Sent: Thursday, October 20, 2005 3:42 PM
To: uClinux development list
Subject: Re: [uClinux-dev] uClinux doesn't boot up on a board with
ColdFireCPU. Help please.


Jivin Wang, Gang S lays it down ...
> Hi,
> 
> I'm now trying to run uClinux (kernel 2.4.x) on a board with Motorola
> ColdFire CPU (the board is based on M5272C23 but has some differences
in
> flash address, MBAR address, etc.). To boot it, I already successfully
> run U-Boot on that board. I have the following problems and would like
> your help.
> 
> -          To make U-Boot boot up uClinux, I need to create uImage by
> running "mkimage" and give load_address as well as entry_point, is
that
> correct?
> 
> -          I did that and burn the created uImage to the flash address
> 0x202000. I did "imi 202000" to verify the CRC and then run "bootm
> 202000". However, after U-Boot gave control to uClinux, the system
just
> hanged there. No more output message. I wonder how to figure out the
> problem.

The kernel expects MBAR to be at 0x10000000,  if you have moved it then
things are not going to work very well.

Have a look in:

	linux-2.4.x/include/asm-m68knommu/coldfire.h

If you can,  you should try and keep MBAR where it is and move some
other bits around,

Cheers,
Davidm

-- 
David McCullough, davidm at cyberguard.com.au, Custom Embedded Solutions +
Security
Ph:+61 734352815 Fx:+61 738913630 http://www.uCdot.org
http://www.cyberguard.com
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