RE: [Ltib] Puzzle: Booting hangs after tranferring from U-boot to Kernel

[Qin, Laigui (GE EntSol, Security)]

Hi Kurt,

Thanks for the pointing. My final goal is to build the Linux kernel with
Ltib, so I posted it here at the beginning..

Yes, I finally found this message in the cf_early_init(). The problem is
that current booting hangs before this message... I think the Uboot
parameter transferring maybe a cause. I have made a post in Uboot
maillist and waiting for reponse...

I have a Greenhill BDM degugger on hand, but since the source code is
maintained by Makefile, I can only trace the steps in assembly :-(..

For the clock, you mean the external RTC? The memory map is a little
different, I handled the difference in Uboot, but in Ltib, I am not sure
where the change should happen and how. Can you give me a guide? 

Thanks,
Mike Qin

-----Original Message-----
From: Kurt Mahan [mailto:address@hidden 
Sent: Monday, June 02, 2008 11:29 PM
To: Stuart Hughes
Cc: Qin, Laigui (GE EntSol, Security); address@hidden
Subject: Re: [Ltib] Puzzle: Booting hangs after tranferring from U-boot
to Kernel

Hi Mike,

You probably want to ask in the Freescale Coldfire Forums.  I monitor it
and answer questions about the M5445x BSP there.
       http://forums.freescale.com/freescale/board?board.id=CFCOMM

The/ "Bumping USB Priority"/ message is emitted from the kernel very
early on to indicate that the memory crossbar switch is being
reprogrammed to give USB the highest access priority to the memory bus. 
This is needed to address an issue with usb disconnects in certain
situations.

As for your issues with transferring control to the kernel.  It could be
a number of things.  Do you have a debugger that you can attach to your
board?

Also -- is your hardware clock/memory map/etc the same as the M54455EVB?

--Kurt

Stuart Hughes wrote:
> Hi Mike,
>
> It could be many things.  Check for instance that you have the right 
> tty type and also baud rate set.
>
> Your best bet would be to try the linuxppc mailing list as this looks 
> like a kernel/setup problem.
>
> Regards, Stuart
>
> On Mon, 2008-06-02 at 14:38 +0530, Qin, Laigui (GE EntSol, Security)
> wrote:
>> Hi all,
>>
>> I have successfully porting U-boot for my custom board. Now, I am 
>> trying to boot the uImage built from the Ltib for M54454EVB (I plan 
>> to modify Ltib based on the M54454EVB, while I am not using its Uboot

>> in Ltib). The booting hangs after tranferring from U-boot to Linux 
>> Kernel. Any one can help on this?
>>
>> ---------------------------------------------------------------------
>> /baudrate    = 115200 bps/
>> /No initrd/
>> /## Transferring control to Linux (at address 40020000) ../ */(HANGS 
>> HERE)/*
>> ---------------------------------------------------------------------
>>
>> And anyone knows the "Bumping USB Priority"? This come before the 
>> "Linux version 2.6.23..." in M54454EVB booting...
>>
>> ---------------------------------------------------------------------
>> /   Verifying Checksum ... OK/
>> /OK/
>> /Bumping USB Priority/
>> /Linux version 2.6.23 (address@hidden) (gcc version 4.2.0 20070318
>> (prerelease) (Sourcery G++ Lite 4.2-35)) #2 Wed May 21 06:59:31 PDT 
>> 2008/
>>
>> ---------------------------------------------------------------------
>>
>> Thanks,
>>
>> *Mike Qin*
>>
>>
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