Re: Adding(?) XI support to MIPS-Linux?

["Kevin D. Kissell" <kevink@mips.com>]

Ralf Baechle wrote:
> On Mon, Jun 09, 2008 at 09:32:59PM +0200, Kevin D. Kissell wrote:
>
>   
> > That is correct, though there has long been interest in having XI/RI as an 
> > option for non-SmartMIPS cores and I would not be surprised if sooner or later 
> > it became more generally available.
> >     
> Cavium has it in their 64-bit core.  I haven't verified this in the docs
> but apparently it is meant to be compatible with the old SmartMIPS ASE
> for MIPS32.
>   
Do check the documentation.  I can't comment officially, but I can 
observe that,
in the hypothetical case where you'd want XI/RI semantics in a 64-bit 
processor,
you might use exactly the same semantics (and therefore the same kernel 
C code
support), but you might want to use different bits  for XI/RI in a 
64-bit TLB entry
than in a 32-bit TLB entry (and therefore different header file 
definitions).
         Regards,

         Kevin K.