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To: Alan Cox <alan@lxorguk.ukuu.org.uk>
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Subject: Re: [parisc-linux] FB cleanups
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From: Jes Sorensen <jes@linuxcare.com>
Date: 17 Apr 2001 20:04:53 +0200
In-Reply-To: Alan Cox's message of "Fri, 13 Apr 2001 19:11:52 +0100 (BST)"
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>>>>> "Alan" == Alan Cox <alan@lxorguk.ukuu.org.uk> writes:

>> Well time to go study the bus behaviors and compare them then. How
>> does gsc behave wrt cache coherency, read-around-write, write
>> ordering etc etc.

Alan> And ISA is noticable for the fact it doesnt behave quite like
Alan> PCI. You use readb/readw/readl on ISA.

Yes, except that ISA has stronger semantics than PCI.

>> Using writeb on a gsc is misleading everybody else who reads the
>> code into believing that it's a PCI device.

Alan> Rubbish.

Unfortunately not, look at the fb code to see the chaos.

Jes