From owner-freebsd-arm@FreeBSD.ORG  Tue Nov 12 23:41:41 2013
Return-Path: <owner-freebsd-arm@FreeBSD.ORG>
Delivered-To: freebsd-arm@FreeBSD.org
Received: from mx1.freebsd.org (mx1.freebsd.org
 [IPv6:2001:1900:2254:206a::19:1])
 (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits))
 (No client certificate requested)
 by hub.freebsd.org (Postfix) with ESMTPS id 8CACF904;
 Tue, 12 Nov 2013 23:41:41 +0000 (UTC)
Received: from mailhost.m5p.com (ip-2-1-0-2.r03.asbnva02.us.ce.gin.ntt.net
 [IPv6:2001:418:0:5000::16])
 (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits))
 (No client certificate requested)
 by mx1.freebsd.org (Postfix) with ESMTPS id 481B121D5;
 Tue, 12 Nov 2013 23:41:41 +0000 (UTC)
Received: from wonderland.m5p.com (localhost [IPv6:::1])
 by mailhost.m5p.com (8.14.5/8.14.5) with ESMTP id rACNfYWa042986;
 Tue, 12 Nov 2013 18:41:39 -0500 (EST)
 (envelope-from george+freebsd@m5p.com)
Message-ID: <5282BCAE.1000707@m5p.com>
Date: Tue, 12 Nov 2013 18:41:34 -0500
From: George Mitchell <george+freebsd@m5p.com>
User-Agent: Mozilla/5.0 (X11; FreeBSD amd64;
 rv:24.0) Gecko/20100101 Thunderbird/24.0
MIME-Version: 1.0
To: Ian Lepore <ian@FreeBSD.org>
Subject: Re: FreeBSD on HardKernel's ODROID platform
References: <106622132.66623.1384225190003.JavaMail.mail@webmail07>	
 <20131112073941.GA19103@mail.bsdpad.com> <52820D9C.8060707@m5p.com>
 <1384274735.31172.299.camel@revolution.hippie.lan>
In-Reply-To: <1384274735.31172.299.camel@revolution.hippie.lan>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit
X-Scanned-By: MIMEDefang 2.73 on 10.100.0.3
X-Greylist: Sender passed SPF test, not delayed by milter-greylist-4.2.7
 (mailhost.m5p.com [IPv6:::1]); Tue, 12 Nov 2013 18:41:39 -0500 (EST)
Cc: freebsd-arm@FreeBSD.org
X-BeenThere: freebsd-arm@freebsd.org
X-Mailman-Version: 2.1.16
Precedence: list
List-Id: Porting FreeBSD to the StrongARM Processor <freebsd-arm.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/options/freebsd-arm>,
 <mailto:freebsd-arm-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-arm/>
List-Post: <mailto:freebsd-arm@freebsd.org>
List-Help: <mailto:freebsd-arm-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-arm>,
 <mailto:freebsd-arm-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Tue, 12 Nov 2013 23:41:41 -0000

On 11/12/13 11:45, Ian Lepore wrote:
> On Tue, 2013-11-12 at 06:14 -0500, George Mitchell wrote:
>> On 11/12/13 02:39, Ruslan Bukin wrote:
>>> [...]
>>> We suspect that uboot sets incorrect values for cpu clocks
>>> and/or voltage regulators. In result we have prefetch abort
>>> after first interrupt received.
>>> [...]
>>
>> Could this be connected to the persistent prefetch abort problem I've
>> been having in my Raspberry Pi?                    -- George Mitchell
>
> I suspected the same thing on my wandboard with the wrong-endian
> prefetch abort problem, and noticed that u-boot was violating some of
> the imx6 rules for voltage regulation, so with great hopes for a fix I
> added some code to the freebsd early kernel init to increase the voltage
> slightly and get all 3 regulators in range with each other according to
> what the manual said... it didn't help.
>
> -- Ian
>

Too bad, but thanks for checking.  Any other progress on the problem?
-- George