[U-Boot] mpc83xx U-boot questions

[Yuke Tian <ytian@bnl.gov>]

Hi David,

Thank you for your kind response. What I am doing is to try to load the
RTEMS (a kind of open source real time operating system) image to the
board. It has a BSP for this board. All the tools I used are targeting
powerpc and tailed for this board.  But the final executable format is
.exe. I am not sure if this format is good to download and run on the
board using U-boot.  I just happen to know there is a mkimage utility
from U-boot.

Thank you,

Yuke

David Hawkins wrote:
> Hi Yuke,
>
>> I am new to U-boot. I have a mpc8313erdb board that already has U-boot
>> burned in flash. When the board reset, I get into U-boot (with U-boot
>> prompt =>).  My questions is: my gcc compiler produce a .exe file, can I
>> just tftp this file to an address and run it (go) ? Or I need to convert
>> it to some format (use mkimage) to run it ?
>>
>> Does the load address and entry address matters ?  Does anyone happen to
>> know what is the correct load address for this board ?  One more
>> question, where do I get the mkimage for this board ?
>
> New to U-Boot and embedded systems, eh?
>
> If your gcc compiler is producing a .exe file, then
> you sound like you are working on a Windows machine,
> with say Cygwin. That particular version of gcc is
> for the *Windows OS* and the *Intel architecture*.
>
> The gcc compiler can be built for a specific processor
> type and OS. The Denx ELDK has a prebuilt version of
> gcc for the PowerPC on the MPC8313 that can be used
> to build both U-boot, stand-alone, and Linux
> applications. You would typically install the ELDK on
> a Linux machine (eg. an Intel-based laptop/desktop).
>
> You'll probably want to get yourself a copy of
>
> "Building Embedded Linux Systems", K. Yagmour, O'Reilly.
>
> and read it to learn some of the basics of embedded
> programming, and cross-platform development.
>
> If you want to run an executable from U-Boot, then you'll
> want to read the 'stand-alone applications' section of
> the DULG.
>
> http://www.denx.de/wiki/DULG/WebHome
>
> But if what you really want is a Linux application, then
> U-Boot will be used to boot Linux, and then your application
> will run under Linux.
>
> If you let us know exactly what you want your program to do,
> we can suggest the path of least-resistance for you.
>
> Cheers,
> Dave
>
>
>
>