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Re: SNI-RM400

To: linux-mips@fnet.fr
Subject: Re: SNI-RM400
From: ralf@uni-koblenz.de
Date: Fri, 17 Apr 1998 16:02:09 +0200
Cc: Chris Wedgwood <chris@cybernet.co.nz>
In-reply-to: <Pine.BSF.3.95.980417081554.10420A-100000@Mercury.mcs.net>; from Andrew Dyer on Fri, Apr 17, 1998 at 08:17:04AM -0500
References: <19980417111915.49107@uni-koblenz.de> <Pine.BSF.3.95.980417081554.10420A-100000@Mercury.mcs.net>
On Fri, Apr 17, 1998 at 08:17:04AM -0500, Andrew Dyer wrote:

> > > Is support for the 4600 complete? I though these had some alien TLB or
> > > something?
> > 
> > R4600 was the first CPU to ever run Linux/MIPS and half of todays CPU's
> > were derived from it like the R5000 etc.
> > 
> > You're thinking of the R6000 / R6000A.  Really unusual stuff.  TLB is
> > part of the last couple of cachelines of the external cache.
> > 
> 
> More likely he's thinking of the base/bounds MMU stuff in the 4650/4640
> CPU family.

Also possible.  The big difference is that it is fundamentally impossible
to support the R4650 / R4640 except with some uclinux/ELKS like thing,
while R6000 / R6000A can be supported quite easily.

  Ralf

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