[Top][All Lists]
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [Ltib] Puzzle: Booting hangs after tranferring from U-boot to Kernel
From: |
Kurt Mahan |
Subject: |
Re: [Ltib] Puzzle: Booting hangs after tranferring from U-boot to Kernel |
Date: |
Tue, 03 Jun 2008 09:38:36 -0600 |
User-agent: |
Thunderbird 1.5.0.12 (X11/20060911) |
Mike has moved this to the Freescale Coldfire Forums.
--Kurt
Qin, Laigui (GE EntSol, Security) wrote:
> Hi Kurt,
>
> As you suggested, I step into the head.S with the debugger. The head.S
> gets hit, so does the cf_early_init(), even the start_kernel() is hit.
> However, everytime executing the printk(), no output from the console.
> Do you know what is going wrong?
>
>
> Mike Qin
>
>
> -----Original Message-----
> From: Kurt Mahan [mailto:address@hidden
> Sent: Tuesday, June 03, 2008 12:15 AM
> To: Qin, Laigui (GE EntSol, Security)
> Cc: Stuart Hughes; address@hidden
> Subject: Re: [Ltib] Puzzle: Booting hangs after tranferring from U-boot
> to Kernel
>
> Hi Mike
>
> Qin, Laigui (GE EntSol, Security) wrote:
>
>> 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 :-(..
>>
>>
> Well -- one of the first things to do is to figure out if you are
> executing the kernel code after the handoff from uboot. I would put a
> halt instruction in linux/arch/m68k/coldfire/head.S and then see if it
> gets hit. And then step through head.S with the debugger.
>
>> 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?
>>
>>
> I meant the processor clock rate -- if you change that you need to
> change some params in the kernel config file.
>
> --Kurt
>
>> 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*
>>>>
>>>>
>>>> _______________________________________________
>>>> LTIB home page: http://bitshrine.org
>>>>
>>>> Ltib mailing list
>>>> address@hidden <mailto:address@hidden>
>>>> http://lists.nongnu.org/mailman/listinfo/ltib
>>>>
>>>>
>>>>
>>> ---------------------------------------------------------------------
>>> -
>>> --
>>>
>>> _______________________________________________
>>> LTIB home page: http://bitshrine.org
>>>
>>> Ltib mailing list
>>> address@hidden
>>> http://lists.nongnu.org/mailman/listinfo/ltib
>>>
>>>
>>>
>>
>>
>
>
- [Ltib] Puzzle: Booting hangs after tranferring from U-boot to Kernel, Qin, Laigui (GE EntSol, Security), 2008/06/02
- Re: [Ltib] Puzzle: Booting hangs after tranferring from U-boot to Kernel, Stuart Hughes, 2008/06/02
- RE: [Ltib] Puzzle: Booting hangs after tranferring from U-boot toKernel, Qin, Laigui (GE EntSol, Security), 2008/06/02
- Re: [Ltib] Puzzle: Booting hangs after tranferring from U-boot to Kernel, Kurt Mahan, 2008/06/02
- RE: [Ltib] Puzzle: Booting hangs after tranferring from U-boot to Kernel, Qin, Laigui (GE EntSol, Security), 2008/06/02
- Re: [Ltib] Puzzle: Booting hangs after tranferring from U-boot to Kernel, Kurt Mahan, 2008/06/02
- RE: [Ltib] Puzzle: Booting hangs after tranferring from U-boot to Kernel, Qin, Laigui (GE EntSol, Security), 2008/06/03
- Re: [Ltib] Puzzle: Booting hangs after tranferring from U-boot to Kernel,
Kurt Mahan <=