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Re: Reverting old hack

To: Bjorn Helgaas <bjorn.helgaas@hp.com>
Subject: Re: Reverting old hack
From: Ralf Baechle <ralf@linux-mips.org>
Date: Wed, 24 Feb 2010 18:41:27 +0100
Cc: Yoichi Yuasa <yuasa@linux-mips.org>, linux-mips@linux-mips.org, Benjamin Herrenschmidt <benh@kernel.crashing.org>
In-reply-to: <201002240959.56706.bjorn.helgaas@hp.com>
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References: <20100220113134.GA27194@linux-mips.org> <20100224090333.44a16d0a.yuasa@linux-mips.org> <20100224164100.GD5130@linux-mips.org> <201002240959.56706.bjorn.helgaas@hp.com>
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On Wed, Feb 24, 2010 at 09:59:56AM -0700, Bjorn Helgaas wrote:

> > There is another somewhat theoretical correctness issue.  Because the
> > VIA SuperIO chip only decodes 24 bits of address space but port address
> > space currently being configured as 32MB there is the theoretical
> > possibility of I/O port addresses that alias with legacy addresses getting
> > allocated.
> 
> Does this mean my comment:
> 
> +        * but the VT82C586 IDE controller does respond at 0x100001f0 because
> +        * it only decodes the low 16 bits of the address.
> 
> should say "24 bits" instead of "16 bits"?

Yes, afair.

  Ralf

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