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Re: [PATCH] Change PCI host bridge setup/resources

To: Geert Uytterhoeven <geert@linux-m68k.org>
Subject: Re: [PATCH] Change PCI host bridge setup/resources
From: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Date: Mon, 09 Apr 2007 18:44:39 +0400
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>, linux-mips@linux-mips.org
In-reply-to: <Pine.LNX.4.64.0704091028010.1807@anakin>
Organization: MontaVista Software Inc.
Original-recipient: rfc822;linux-mips@linux-mips.org
References: <20070408113457.GB7553@alpha.franken.de> <4619245F.4030704@ru.mvista.com> <20070408230710.GA9092@alpha.franken.de> <Pine.LNX.4.64.0704091028010.1807@anakin>
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Hello.

Geert Uytterhoeven wrote:

This is certainly *not* a PCI or [E]ISA resource. It's decoded by the *host* bridge.

so ? It's an IO address no device should use, because it won't work.
Therefore mark it busy. That's all the code does.

Yep, it's transparently decoded ISA (which is behind PCI) to control the PCI
bus. Just traditional PC legacy hacks :-)

Rubbish. I was complaining about the PCI config/data ports at 0xCF8/0xCFC which are by no means part of either [E]ISA or PCI. They're decoded by the host to PCI bridge.

WBR, Sergei

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