Re: Booting homebrew ELF kernel on NewWorld OpenFirmware 3.0?

[Hollis Blanchard]

On Oct 15, 2005, at 5:35 PM, Andrei Warkentin wrote:

> Thanks for your help. Right now I've gotten to the point where I can 
> print ``hello world'' and exit back to OpenFirmware.
> It is interesting though that I cannot ``boot'' it again (or for that 
> matter launch BootX and procede back into OS X) until I reboot the 
> machine.
> When I boot my own kernel again I get a CLAIM Failed. When I boot 
> BootX I get ``illegal instruction executed``. As far as I understand, 
> it is because OF CLAIMed the memory area where it was loading my 
> image, and after my kernel quit, that area was still CLAIMed by OF, so 
> it couldn't CLAIM it again. Is there some way of convincing OF to free 
> up the memory it just gobbled up, after my kernel had exited?

The real problem is that many firmwares are not well-tested for unusual 
cases like this.

It's probably possible to fix this up with a Forth script, but 
reset-all isn't too inconvenient...

-Hollis