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From: Pavel Machek <>
To: Greg Ungerer <>
Subject: Re: Conserving memory for an embedded application
Date: Mon, 30 Sep 2002 00:38:23 +0000	[thread overview]
Message-ID: <> (raw)
In-Reply-To: <>; from on Wed, Sep 25, 2002 at 04:25:42PM +1000


> >> 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:
> >
> 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

  reply	other threads:[~2002-10-01 22:19 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2002-09-25  6:25 Greg Ungerer
2002-09-30  0:38 ` Pavel Machek [this message]
  -- strict thread matches above, loose matches on Subject: below --
2002-09-25  4:53 Michael D. Crawford
2002-09-24 21:59 ` Brad Hards
2002-09-25  0:52 ` Ralf Baechle
2002-09-25  5:18 ` Robert Schwebel

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