[parisc-linux] Watchdog on parisc?

Grant Grundler grundler@dsl2.external.hp.com
Sun, 16 Feb 2003 22:11:08 -0700

On Sun, Feb 16, 2003 at 10:42:35AM +0100, Jan-Benedict Glaw wrote:
> So there's nothing what's like a watchdog as you know it from some
> machines (SGI Indys for example) or as add-on cards in machines (PCI/ISA
> cards).

Offhand, I think all the HP9000/8xx servers have either built-in
or add-on "management ports" for remote console. And that always
includes ability to reset or cycle power on the machine (or generate TOC).

> > not if it's what I'm thinking of (transaction timeout, ie causes an
> > HPMC). This is a built-in HW feature. 
> Hmmm... Triggering a HPMC would be a neat feature. So we could think
> about a way to initiate something that, if not handled, would trigger a
> HPMC some 60 seconds later:-?

Generating an HPMC is easy. reference an address in MMIO space that
isn't maintained by a device.  Figuring out a failsafe way of knowing
when to trigger the HPMC is the hardpart.
Besides, Lamont proposed a patch to reset the machine after HPMC/panic.
I thought it was a great idea but several people I trust tell me it
needs a bit more work.