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Date: Fri, 10 Jul 2009 08:16:15 -0500
From: Anthony Liguori <anthony@codemonkey.ws>
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Subject: Re: [Qemu-devel] [PATCH 6/6] use uint32_t for ioport port and value
	instead of int.
References: <1246530731-14597-1-git-send-email-yamahata@valinux.co.jp>	<1246530731-14597-7-git-send-email-yamahata@valinux.co.jp>	<4A564003.5080707@codemonkey.ws>	<20090710082121.GB5471@const.bordeaux.inria.fr>	<20090710084508.GM12665%yamahata@valinux.co.jp>	<20090710085434.GK5471@const.bordeaux.inria.fr>
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To: Tristan Gingold <gingold@adacore.com>
Cc: Isaku Yamahata <yamahata@valinux.co.jp>, Samuel Thibault <samuel.thibault@gnu.org>, qemu-devel@nongnu.org

Tristan Gingold wrote:
> Yes.
>
> Port IO is done through usual memory access, but either the processor 
> or the north-bridge can recognize this
> address and convert the memory access to a port access.  After all PCI 
> cards knows about IO vs Memory.

So would we actually model this in QEMU through cpu_in/out?

Can PCI IO regions that are marked as PIO actually be > 16-bit in size?

Regards,

Anthony Liguori