Re: [Ltib] Loading kernel onto the target board and boot the target

[aaron]

I'm working with a MPC8349E processor and a reference board from Wind
River.  I can tell you that I had tried a BSP intended for the EP8343M
board from Embedded Planet, and as I recall, I wasn't able to get that to
run properly with my MPC8349E processor and reference board.  I definitely
encountered problems after that kernel printout during various attempts to
find a working kernel.  Sometimes I would get to that "Uncompressing
Kernel Image ... OK", and then it would hang.  Other times it would reboot
continuously.  It's not a U-Boot problem.  It's a kernel problem.  Once I
got the right kernel it ran as expected.  The next printout for my kernel
is "## Loading RAMDisk Image at ffa00000 ...", so it looks like you have
some very basic setup issue with your kernel.  Either the wrong processor
is selected, or your board is not being initialized properly.  I'm far
from a kernel expert, and I believe this is fairly basic info, so just
keep trying different kernels or kernel configurations until you find
something that works for your processor/board.  Smaller possibility that
it could be your cross-tool chain as well.

> Hi Jyotshna,
>
> I just checked back in my archives, and this is just a "straw man"
> platform I added at a user request.  I've never personally worked on
> this or do I have an 82xx platform to test on.
>
> Sorry to be vague, but it looks like there's something wrong with your
> kernel image. It could be anything from load address to bootloader
> issues.  Looking at what I put it, the kernel extracted from a very old
> PCS BSP that was known to work on an 8260ads.  So your board is
> different, so you would need to make at least some adjustments to the
> kernel configuration.  Personally I would recommend adding another
> kernel spec and .config file to reference a more up to date kernel.
>
> Unfortunately I'm no kernel expert.  So the best way to get help with
> this would be to ask some kernel hackers (ppc-dev), or on some other
> embedded forum where there's a person with the same type of board as
> you.  If they have a working board/kernel/config you can easily add that
> to the ltib configuration.
>
> Maybe someone else on the list can help?
>
> Regards, Stuart
>
>
> On Thu, 2008-10-16 at 07:27 -0700, Jyotshna Cherukuri wrote:
>> Hi Stuart,
>>
>> Below is the o/p of cat .config
>>
>> address@hidden ltib]$ cat .config
>> #
>> #
>> CONFIG_PLATFORM_DIR="config/platform/mpc82xx"
>>
>>
>> Thanks
>> Jyotshna
>>
>> --- On Thu, 10/16/08, Stuart Hughes <address@hidden> wrote:
>>         From: Stuart Hughes <address@hidden>
>>         Subject: Re: [Ltib] Loading kernel onto the target board and
>>         boot the target
>>         To: address@hidden
>>         Date: Thursday, October 16, 2008, 10:03 AM
>>
>>         Hi Jyotshna,
>>
>>         When you built your image you must have selected a
>>         board/platform.
>>          This
>>         will be recorded in the top level .config.  Can you run:
>>
>>         $ cat .config
>>
>>         and post the output.
>>
>>         As far as I know (and I looked) we do not have and MPC8275
>>         targets in
>>         LTIB.
>>
>>         Regards, Stuart
>>
>>         On Thu, 2008-10-16 at 06:36 -0700, Jyotshna Cherukuri wrote:
>>         >
>>         > Hi Stuart,
>>         >
>>         > Thanks for your help and
>>         >
>>         > Ltib version :: ltib 8.1.2 ($Revision: 1.18 $ sv)
>>         > the board we are trying it on is PQIIFADS which has MPC8275
>>         processor.
>>         > and I am not exactly sure to what you meant by configuration
>>         and BSP.
>>         > Can you be more specific on those 2 questions.
>>         >
>>         > Thanks
>>         > Jyotshna
>>         >
>>         >
>>         >
>>         > --- On Thu, 10/16/08, Stuart Hughes <address@hidden> wrote:
>>         >         From: Stuart Hughes <address@hidden>
>>         >         Subject: Re: [Ltib] Loading kernel onto the target
>>         board and
>>         >         boot the target
>>         >         To:
>>          address@hidden
>>         >         Cc: address@hidden
>>         >         Date: Thursday, October 16, 2008, 4:12 AM
>>         >
>>         >         Hi Jyotshna,
>>         >
>>         >         That's not enough to go on.
>>         >
>>         >         Which version of LTIB? from Freescale or Savannah?
>>         >         Which
>>         >          BSP?
>>         >         What configuration (default or otherwise)?
>>         >         Which board are you trying it on?
>>         >
>>         >         Regards, Stuart
>>         >
>>         >
>>         >         On Wed, 2008-10-15 at 07:15 -0700, Jyotshna
>>         Cherukuri wrote:
>>         >         > Hi All,
>>         >         >
>>         >         > I had built linux kernel and file system for ppc
>>         using ltib
>>         and when I
>>         >         > try to  load the kernel in the eval board RAM
>>         using UBoot,
>>         the board
>>         >         > displays "Uncompressing Kernel Image ... OK" and
>>         it
>>         restarts
>>         >
>>          > immediately back into UBoot. The kernel doesn't print
>>         anything on
>>         >         > screen. Could anyone please let me know to what
>>         might be the
>>         possible
>>         >         > reasons for the board to reset itself. Any help
>>         would be
>>         greatly
>>         >         > appreciated.
>>         >         >
>>         >         > Thanks in advance
>>         >         > Regards
>>         >         > Jyotshna
>>         >         >
>>         >         >
>>         >         >
>>         >         >
>>         >         > _______________________________________________
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>>
>
>
>
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