Re: NMI handling in MIPS64

[Jun Sun <jsun@mvista.com>]

On Mon, Mar 29, 2004 at 06:39:16PM -0500, Lijun Chen wrote:
> Hi,
> 
> I noticed there is a NMI handler in mips32 kernel tree 
> (arch/mips/kernel/head.S and traps.c).
> But there is not a counterpart in mips64. Do we need one?

Personally I don't see much need of this.  Even if firmware redirect
NMI to the linux handler, you would die anyway.

> >From Ralf's earlier emails, the execution of NMI will pass through the 
> >firmware. Does that
> mean just the firmware handles the NMI? 

Yes.

> And if the NMI can be enabled/disabled?

The NMI on CPU can't be disabled.  Of course you can always have extra
PIC in front of the NMI signal and you are free to enable/disable 
there.

Jun