value of XIP? and whether it works with 2.6 kernel?

Wolfgang Denk wd at
Wed Aug 25 17:55:26 EST 2004

In message <Pine.LNX.4.60.0408241141110.6489 at localhost.localdomain> you wrote:
>    as i read it from david w's post on the MTD list, XIP has limited
> value since flash is noticeably more expensive than RAM anyway.

The fact that flash is more expensive does NOT mean that XIP  has  no
use.  Actually  this  is nonsense. There are several good reasons why
using XIP may be a good idea. For example, in some security  critical
environments users are much more happy to execute code from read-only
storage. Also boot time may be an issue.

>    so, thoughts?  who's actually using this?  and it's not clear from
> the DENX page that there's a patch for the 2.6 kernel -- that page
> refers specifically to 2.4.

We use it on 2.4 with 8xx only (so far).

>    anyway, i'm just curious, wondering whether it would be worth giving
> it a try, just for the entertainment value.

Go on...

Best regards,

Wolfgang Denk

Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
Phone: (+49)-8142-4596-87  Fax: (+49)-8142-4596-88  Email: wd at
You can observe a lot just by watchin'.                  - Yogi Berra

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