From mboxrd@z Thu Jan  1 00:00:00 1970
From: Samuel Thibault <samuel.thibault@ens-lyon.org>
Subject: Re: Using mini-os ioremap()
Date: Thu, 6 Jan 2011 18:19:21 +0100
Message-ID: <20110106171921.GF5776@const.bordeaux.inria.fr>
References: <4D24C587.6060907@jhuapl.edu>
	<20110105225552.GI4618@const.famille.thibault.fr>
	<4D25F514.3010502@jhuapl.edu>
Mime-Version: 1.0
Content-Type: text/plain; charset=iso-8859-1
Content-Transfer-Encoding: quoted-printable
Return-path: <xen-devel-bounces@lists.xensource.com>
Content-Disposition: inline
In-Reply-To: <4D25F514.3010502@jhuapl.edu>
List-Unsubscribe: <http://lists.xensource.com/mailman/listinfo/xen-devel>,
	<mailto:xen-devel-request@lists.xensource.com?subject=unsubscribe>
List-Post: <mailto:xen-devel@lists.xensource.com>
List-Help: <mailto:xen-devel-request@lists.xensource.com?subject=help>
List-Subscribe: <http://lists.xensource.com/mailman/listinfo/xen-devel>,
	<mailto:xen-devel-request@lists.xensource.com?subject=subscribe>
Sender: xen-devel-bounces@lists.xensource.com
Errors-To: xen-devel-bounces@lists.xensource.com
To: Matthew Fioravante <matthew.fioravante@jhuapl.edu>
Cc: Rolf Neugebauer <rolf.neugebauer@netronome.com>, "xen-devel@lists.xensource.com" <xen-devel@lists.xensource.com>
List-Id: xen-devel@lists.xenproject.org

Matthew Fioravante, le Thu 06 Jan 2011 12:00:04 -0500, a =E9crit :
>  My box doesn't have more than 4GB. I've tried this on 32 bit and 64 bi=
t.

How much does it have? Could you post the memory map recorded in xm
dmesg?

> I tried nuking the mfn_is_ram check. When I do that the call returns a=20
> virtual memory address but when I try to read and write to it, it=20
> appears to act just like a normal page of memory and not the device.

Mmm... I wonder how that can be possible if your address is really an IO
area.

> Does anyone know offhand of a mini-os project that either tested the=20
> ioremap() call or actually does some memory mapped io operations?

It was implemeted by Rolf Neugebauer <rolf.neugebauer@netronome.com>,
Cc-ed.

Samuel