From: Christoph Hellwig <hch@infradead.org>
To: Arnd Bergmann <arnd@arndb.de>
Cc: Jiri Slaby <jirislaby@gmail.com>, Pekka Paalanen <pq@iki.fi>,
linux-kernel@vger.kernel.org
Subject: Re: Do cpu-endian MMIO accessors exist?
Date: Tue, 21 Jul 2009 17:33:33 -0400 [thread overview]
Message-ID: <20090721213333.GA27202@infradead.org> (raw)
In-Reply-To: <200907212315.50225.arnd@arndb.de>
On Tue, Jul 21, 2009 at 11:15:49PM +0200, Arnd Bergmann wrote:
> The best solution would be if you could find a way to set
> the hardware into little-endian mode on all architectures.
> >From the description, it sounds like the hardware should allow that.
Why would you want to do that? That just means a useless byteswap.
We really should have a generic native-endian MMIO-access API as there
is quite a bit of hardware with features like that, and currently we
have a miriad of hacks using __raw_* and manual barriers, the ppc
specific accessors and god knows what.
next prev parent reply other threads:[~2009-07-21 21:33 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-07-21 20:42 Pekka Paalanen
2009-07-21 20:59 ` Jiri Slaby
2009-07-21 21:15 ` Arnd Bergmann
2009-07-21 21:33 ` Christoph Hellwig [this message]
2009-07-21 22:01 ` Arnd Bergmann
2009-07-22 17:11 ` Pekka Paalanen
2009-07-22 21:19 ` Arnd Bergmann
2009-07-23 16:23 ` Pekka Paalanen
2009-07-22 21:20 ` Arnd Bergmann
2009-07-21 21:56 ` Jiri Slaby
2009-07-21 22:05 ` Arnd Bergmann
2009-07-22 7:24 ` Jiri Slaby
2009-07-22 8:35 ` Arnd Bergmann
2009-07-22 8:43 ` Alan Cox
2009-07-22 13:44 ` Arnd Bergmann
2009-07-27 5:00 ` Paul Mundt
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