Booting Standalone App?

Hi there,

So what are the steps to get u-boot to boot the hello_world example? I'm evaluating the PowerPC 440-based AMCC Yosemite board. This is what I have done:

gzip hello_world.bin

mkimage -A ppc -0 linux -T standalone -C gzip -a 40000 -e 40004 -n "Standalone" -d hello_world.bin.gz hello_world.ub

Then I loaded the ub file onto the board at 0x40000. Then when I tried to bootm 40000, it would uncompress the standalone app (Uncompressing Standalone Application ... OK) then stop after showing 2 symbols.

What am I doing wrong?

I'm a complete newbie to u-boot and I've tried to find discussions online and reading the DULG, but I'm not having too much luck...

Thanks!

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Here are the notes I wrote for the Yosemite board, they include how to build the standard standalone example. Perhaps that will help you.

http://www.ovro.caltech.edu/~dwh/powerpc_440ep.pdf

Cheers,
Dave

Please RTFM.

Seems you didn't really try.

See http://www.denx.de/wiki/view/DULG/UBootStandalone and
http://www.denx.de/wiki/view/DULG/MyStandaloneProgramDoesNotWork

Best regards,

Wolfgang Denk

DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
Save energy:  Drive a smaller shell.

Wolfgang,

Thank you for your reply.

I've already read the documents that you have referenced before posting my first message. I had already gotten hello_world to run in u-boot without problems (by using the go command), so that is not an issue.

My original question was - is it possible to boot a standalone application like the hello_world example like a kernel? I did not see any reference materials which shows how this is done. I have not changed the code in hello_world, so the entry point should not have moved. Did I use mkimage correctly?

Thanks,
Randy

See http://www.denx.de/wiki/view/DULG/UBootStandalone and
http://www.denx.de/wiki/view/DULG/MyStandaloneProgramDoesNotWork

Best regards,

Wolfgang Denk

DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
Save energy:  Drive a smaller shell.

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Well, that's the documented way to start standalone applications.

The only documented way, IIRC.

Is it a kernel? No. Does any part of the documentation say it could be used like that? No.

This question makes no sense to me.

Best regards,

Wolfgang Denk

DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
If you can't beat it or corrupt it, you pretend it was your  idea  in
the first place.                 - Terry Pratchett, _Guards! Guards!_