Re: LOBOS (kexec)

Tim Hockin
2001-11-20T06:04:38Z

> The hard part is not linux booting linux but the passing of the
> firmware/BIOS tables from one kernel to the next. Especially those
> that can only be obtained by a 16bit query. It is my assumption that
> after the OS runs you cannot return to the firmware, it's state is
> hopelessly mangled. That may not be totally true but it is fairly
> close to the truth.

It is unless you control the firmware. Our (Cobalt) firmware reserves a
region of memory which the primary (in-flash) kernel is not made aware of.
The in-flash kernel can do all the fun things a kernel can do, and then
return to firmware.