From: Jes Sorensen <jes@sunsite.dk>
To: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: davidm@hpl.hp.com, linux-kernel@vger.kernel.org
Subject: Re: ioremap() vs. ioremap_nocache()
Date: 05 Oct 2001 16:12:49 +0200 [thread overview]
Message-ID: <d3itdutbtq.fsf@lxplus014.cern.ch> (raw)
In-Reply-To: <E15pFPM-00044b-00@the-village.bc.nu>
In-Reply-To: Alan Cox's message of "Thu, 4 Oct 2001 21:47:52 +0100 (BST)"
>>>>> "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
next prev parent reply other threads:[~2001-10-05 14:12 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-10-04 0:29 David Mosberger
2001-10-04 20:47 ` Alan Cox
2001-10-05 14:12 ` Jes Sorensen [this message]
2001-10-05 14:39 ` Alan Cox
[not found] <E15pXGL-0006n6-00@the-village.bc.nu>
[not found] ` <15293.54409.884529.251159@napali.hpl.hp.com>
2001-10-05 16:08 ` David Mosberger
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