AFAIK sbmips is mips64 arch, perhaps you might get some pointers
from there. You probably would like to have ("write") kernel compat
glue to be able to run 32bit userland with 64bit kernel, which
might not be written for mips yet (at least I didn't notice any
COMPAT_NETBSD32 option in sbmips kernel config).

Jaromir

GIRISH V. GULAWANI wrote:
> 
> Hello, All.
> Subject is quite discussed at length. However my
> target is slightly different.
> After Malta4Kc is running for me, I'm looking into
> 64-bit port. I've MIPS 20Kc for next couple of weeks.
> >From last 2 days I was trying to bring up the Bonito64
> part. Now, including PCI detection & access to some of
> the devices I'm able to move the kernel. 
> Since I am new to NetBSD development I've couple of
> doubts.
> .1 TOOLCHAIN: Currently I'm using the lastest (March
> 27?) build of cross mipseb toolchain. I do "config
> MALTA" with MIPS32 & MIPS64 both. Is this all ok? How
> to build entire 64bit kernel??
> .2 USERLAND: Since sgimips did work for me on Malta4Kc
> I guess it will work with this board too. Anyway,
> where to get the all 64bit userland?
> .3 KERNEL: Many features of 20Kc are expected to
> enhance total performance. Is there anybody already
> working on this particular port? I'm very much
> interested in this port. It'd be great if we start
> disucussing about it. Especially about the toolchain &
> the port in detail.
> Ofcourse looking at the responses that I did *not* get
> it is quite disappointing, sometimes. Let us keep this
> list active.
> Many thanks.
> Girish.
> 
> 
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-- 
Jaromir Dolecek <jdolecek@NetBSD.org> http://www.NetBSD.org/Ports/i386/ps2.html
-=- We should be mindful of the potential goal, but as the tantric    -=-
-=- Buddhist masters say, ``You may notice during meditation that you -=-
-=- sometimes levitate or glow.   Do not let this distract you.''     -=-