[U-Boot] mpc83xx U-boot questions

[Yuke Tian]

David Hawkins wrote:
> Hi Yuke,
>
>> To be specific, I followed the steps to build RTEMS:
>> 1) Download a set of toolsets (gcc-4.2.3, binutils-2.18, newlib-1.16 and
>> RTEMS specific patches) and build them or use the pre-built rpm toolset
>> for RHLE5.
>> 2) Download the RTEMS (4.9.0 for the latest version) and use the toolset
>> to build RTEMS.
>> 3) Compile a RTEMS application,  tailed for specific BSP.  That is where
>> I get .exe (it is ELF 32-bit MSB executable, PowerPC or cisco 4500,
>> version 1 (SYSV), statically linked, not stripped).  I just want to use
>> the vendor provided U-Boot to download the .exe and get it run. I didn't
>> expect to rebuilt U-Boot, but that might be educational :-)          
>
> Great, that is useful background information in which
> to pose your questions.
>
> It sounds like the Makefile puts a .exe extension on
> the ELF file, and that can safely be ignored.
>
> Does the RTEMs BSP for the MPC8313 board have a README
> that tells you how to boot RTEMs? The ELF file is
> not what will be executed by U-Boot. powerpc-linux-objcopy
> would most likely be used to convert the ELF into a binary
> image.  mkimage might be run on that image to add a header.
> However, I've only used U-Boot with standalone apps and
> Linux, so someone else would have to comment.
> (VxWorks/RTEMs users - any help here?)
>
> It does however sound like you have a reasonable tools
> setup, and the step you are looking for is
>
>  'what is necessary to convert the ELF file to a U-Boot
>   compatible format, and then what U-Boot command is needed
>   to execute it?'
>
That is exactly what I want now (I need to pick up U-boot later :-) ). I
will try powerpc-linux-objcopy and let you know.

Thank you and sorry again for the unclear statement.

> Hopefully someone can help answer that. Please go and re-review
> the U-Boot README file too, there's a chance that there are
> some useful comments in there - now that you know what you
> are looking for.
>
> If someone on the RTEMs list answers your question, please
> post the results back to this list so that the solution
> is available in the archive.
>
> Cheers,
> Dave
>
>