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Re: Generic DISCONTIGMEM Support on 32bit MIPS

To: Ralf Baechle <ralf@oss.sgi.com>
Subject: Re: Generic DISCONTIGMEM Support on 32bit MIPS
From: Phil Thompson <phil@river-bank.demon.co.uk>
Date: Sat, 26 Jan 2002 10:37:34 +0000
Cc: linux-mips@oss.sgi.com
Organization: At Home
References: <3C51838A.174F8712@river-bank.demon.co.uk> <20020125124429.A961@dea.linux-mips.net>
Sender: owner-linux-mips@oss.sgi.com
Ralf Baechle wrote:
> 
> On Fri, Jan 25, 2002 at 04:10:50PM +0000, Phil Thompson wrote:
> 
> > I'm working on a port of 32bit MIPS to a board with several large holes
> > in the memory map. So I need to re-implement paging_init() and
> > mem_init().
> >
> > The first question is: has anybody already done this? Particularly as,
> > once you've identified where the holes are, the code isn't board
> > specific.
> >
> > If not then I'll try to work out what needed from the corresponding
> > mips64 and ip27 code, but I'd appreciate any pointers.
> 
> Great, I was already planning to do this next.  Discontiguous memory is a
> common problem on MIPS systems; it's almost standard for systems that
> have more than 256mb of memory.

You may still be quicker as I'm starting from a position of almost
complete ignorance.

Phil

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