From: Samuel Thibault <samuel.thibault@ens-lyon.org>
To: Matthew Fioravante <matthew.fioravante@jhuapl.edu>
Cc: Rolf Neugebauer <rolf.neugebauer@netronome.com>,
"xen-devel@lists.xensource.com" <xen-devel@lists.xensource.com>
Subject: Re: Using mini-os ioremap()
Date: Thu, 6 Jan 2011 18:19:21 +0100 [thread overview]
Message-ID: <20110106171921.GF5776@const.bordeaux.inria.fr> (raw)
In-Reply-To: <4D25F514.3010502@jhuapl.edu>
Matthew Fioravante, le Thu 06 Jan 2011 12:00:04 -0500, a écrit :
> My box doesn't have more than 4GB. I've tried this on 32 bit and 64 bit.
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
> virtual memory address but when I try to read and write to it, it
> 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
> ioremap() call or actually does some memory mapped io operations?
It was implemeted by Rolf Neugebauer <rolf.neugebauer@netronome.com>,
Cc-ed.
Samuel
prev parent reply other threads:[~2011-01-06 17:19 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-01-05 19:24 Using mini-os ioremap() Matthew Fioravante
2011-01-05 22:55 ` Samuel Thibault
2011-01-06 17:00 ` Matthew Fioravante
2011-01-06 17:19 ` Samuel Thibault [this message]
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