On Wed, 8 Oct 2003, Ralf Baechle wrote: > That hook you're proposing isn't even necessary in generic code. NMI > on MIPS hardware is a fairly odd type of exception - it goes straight to > 0xbfc00000 which usually is a a firmware address - and lots of firmware > doesn't even offer an NMI hook. So for those cases where it's possible, > you need to do something firmware anyway before jumping to Linux's NMI > handler. An additional problem with the NMI design of MIPS is it's using > ErrorEPC, just like cache errors so you better pray - or simply design > systems only to rely on NMI for debugging and catastrophic failures. On Lasat boards NMI is used to reboot into Service Mode. There's no hook to override this behaviour. // Thomas
