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Re: [Xen-devel] Using mini-os ioremap()

To: Matthew Fioravante <matthew.fioravante@xxxxxxxxxx>
Subject: Re: [Xen-devel] Using mini-os ioremap()
From: Samuel Thibault <samuel.thibault@xxxxxxxxxxxx>
Date: Thu, 6 Jan 2011 18:19:21 +0100
Cc: Rolf Neugebauer <rolf.neugebauer@xxxxxxxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>
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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

> 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

> 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@xxxxxxxxxxxxx>,


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