Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Wed, 3 Oct 2001 21:10:30 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Wed, 3 Oct 2001 21:10:19 -0400 Received: from [209.237.5.66] ([209.237.5.66]:15778 "EHLO clyde.stargateip.com") by vger.kernel.org with ESMTP id ; Wed, 3 Oct 2001 21:10:10 -0400 From: "Ian Thompson" To: Subject: How can I jump to non-linux address space? Date: Wed, 3 Oct 2001 18:10:31 -0700 Message-ID: MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook IMO, Build 9.0.2416 (9.0.2910.0) Importance: Normal X-MimeOLE: Produced By Microsoft MimeOLE V5.50.4133.2400 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Hi all, I'm sorry if this is off-topic, but I wasn't sure where else to ask... My kernel is running from RAM, and I want to jump to an address in ROM (which unfortunately, the kernel doesn't seem to know anything about). I don't plan on trying to resume the kernel after doing this. However, I'm getting a prefetch abort. If I try and load the data, I get a similar error: "Unable to handle kernel paging request at virtual address 00003000" where 0x3000 is the ROM address I'm trying to jump to / load from. How can I pass execution to this address? Do I have to turn off the MMU? FYI, I'm running a 2.2 variant on an XScale, and used inline assembly to generate the load & the branch. Thanks for your help, -ian - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/