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List:       linux-arm-kernel
Subject:    Re: XIP?
From:       Marc Singer <elf () buici ! com>
Date:       2004-04-19 17:33:54
Message-ID: 20040419173354.GA31721 () flea
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On Mon, Apr 19, 2004 at 12:22:14PM -0500, Mark Beckwith wrote:
> Hi guys, I just got informed from my client that:
> 
> "XIP is CRITICAL to this project.  If this won't work, we need to know it
> ASAP and will need to re-evaluate our approach.  Resolving the issues with
> XIP needs to be your top priority, above trying to reduce code size or
> working on additional drivers."

I've heard that there are patches.  I've never tried them because
execution from flash is so slow.

> The target platform has 2M of flash and 2M of Ram.  From what I've read so
> far about XIP on arm, its a lot of work and its not going to save me anyway
> (its not a silver bullet).  So, do I have a prayer?  Any thoughts would be
> appreciated.  

I've been able to get the compressed kernel down to about 500K, IIRC.
I think that your target be too small for Linux.  Try eCos.

Cheers.

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