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Date: Mon, 30 Sep 2002 00:38:23 +0000
From: Pavel Machek <pavel@suse.cz>
To: Greg Ungerer <gerg@snapgear.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: Conserving memory for an embedded application
Message-ID: <20020930003822.A35@toy.ucw.cz>
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Hi!

> >> One question I have is whether it is possible to burn an uncompressed image
> >> of the kernel into flash, and then boot the kernel in-place, so that it is
> >> not copied to RAM when it runs.  Of course the kernel would need RAM for
> >> its data structures and user programs, but it would seem to me I should be
> >> able to run the kernel without making a RAM copy.
> > The uclinux guys have eXecute In Place  - google search for uclinux and XIP 
> > will produce a stack of hits - here's one:
> > http://www.snapgear.com/tb20010618.html
> 
> Yep, we have this for uClinux. Currently we are only doing
> this on MMU-less processors though, I haven't heard of anyone
> doing kernel (or apps) XIP from flash on VM processors.

I thought they were doing XIP on VTechHelio? That's MIPS39xx and has MMU.
See linux-vr project.

-- 
Philips Velo 1: 1"x4"x8", 300gram, 60, 12MB, 40bogomips, linux, mutt,
details at http://atrey.karlin.mff.cuni.cz/~pavel/velo/index.html.

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