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Re: MIPS 64?

To: "Matthew Dharm" <mdharm@momenco.com>
Subject: Re: MIPS 64?
From: "Kip Walker" <kwalker@broadcom.com>
Date: Wed, 15 May 2002 15:29:01 -0700
Cc: Linux-MIPS <linux-mips@oss.sgi.com>
Organization: Broadcom Corp. BPBU
References: <NEBBLJGMNKKEEMNLHGAICEACCHAA.mdharm@momenco.com>
Sender: owner-linux-mips@oss.sgi.com
Yes... in my environment, I have firmware calls to find out what
physical memory exists, then I call add_memory_region as necessary.  See
arch/mips/sibyte/swarm/setup.c if you're interested.  Nothing too
interesting about it.

Kip

Matthew Dharm wrote:
> 
> Right....
> 
> So, how should my boot code convey that info?  With more
> add_memory_region() calls?  Is that really all I need?
> 
> Matt
> 
> --
> Matthew D. Dharm                            Senior Software Designer
> Momentum Computer Inc.                      1815 Aston Ave.  Suite 107
> (760) 431-8663 X-115                        Carlsbad, CA 92008-7310
> Momentum Works For You                      www.momenco.com
> 
> > -----Original Message-----
> > From: owner-linux-mips@oss.sgi.com
> > [mailto:owner-linux-mips@oss.sgi.com]On Behalf Of Kip Walker
> > Sent: Wednesday, May 15, 2002 3:15 PM
> > To: Matthew Dharm
> > Cc: Linux-MIPS
> > Subject: Re: MIPS 64?
> >
> >
> > Matthew Dharm wrote:
> > >
> > > I don't suppose anyone has a primer or white paper on the
> > High Memory
> > > stuff?  i.e. Applications, requirements, or a quick HOWTO?
> >
> > Well, the CONFIG option is at the bottom of the Machine
> > Selection menu.
> > With a fairly recent 2.4 or 2.5 kernel, it should build at work.
> > Basically, if your firmware/boot code conveys info about
> > regions above
> > physical address 0x1fffffff, the kernel will allocate "struct page"
> > entries for it, and add them to the pool of allocatable memory.  The
> > kernel gets at them by mapping them into Kseg2/Kseg3 temporarily.
> >
> > turn it on, see what happens!  I haven't looked for a primer.
> >
> > Kip
> >


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