CPU reset GPIO & latest powerbooks
CPU reset GPIO & latest powerbooks
- Subject: CPU reset GPIO & latest powerbooks
- From: Benjamin Herrenschmidt <email@hidden>
- Date: Wed, 22 Sep 2004 18:50:05 +1000
Hi !
I know it's an odd question but I would really appreciate if somebody
from Apple could find an answer to it ;)
So basically, earlier machine models used to have the CPU soft reset
line connected to a KL GPIO (used on SMP boxes to bring CPUs up, but
fortunately for me also wired on UP boxes).
This was a very useful kernel debugging tool as I could use a firewire
controller to remotely toggle the GPIO and thus get a 0x100 exception
even when the CPU was locked up with interrupts disabled.
I'm currently chasing a lockup of the latest albooks (in linux) but
couldn't seem to trigger a 0x100 with any of those GPIOs (nor a couple
of other random ones I tried). Is there a way to do the same thing at
all on those machines models ?
Thanks in advance for any reply,
Regards,
Ben.
_______________________________________________
Do not post admin requests to the list. They will be ignored.
Darwin-dev mailing list (email@hidden)
Help/Unsubscribe/Update your Subscription:
This email sent to email@hidden