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To: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: davidm@hpl.hp.com, linux-kernel@vger.kernel.org
Subject: Re: ioremap() vs. ioremap_nocache()
In-Reply-To: <E15pFPM-00044b-00@the-village.bc.nu>
From: Jes Sorensen <jes@sunsite.dk>
Date: 05 Oct 2001 16:12:49 +0200
In-Reply-To: Alan Cox's message of "Thu, 4 Oct 2001 21:47:52 +0100 (BST)"
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>>>>> "Alan" == Alan Cox <alan@lxorguk.ukuu.org.uk> writes:

>> Now, as far as I know, on x86, ioremap() will give write-through
>> cached mappings (in the absence of mtrr games).  If this is true,
>> how

Alan> On x86 ioremap will give mappings appropriate to the object you
Alan> map - which means by default it wil give uncached mappings. The
Alan> PCI hardware will do intelligent things in certain cases such as
Alan> write merging

Are you thereby saying that ioremap() and ioremap_nocache() are
identical on the x86?

Cheers,
Jes