From: David Schleef <ds@schleef.org>
To: David T Eger <eger@cc.gatech.edu>
Cc: linux-kernel@vger.kernel.org
Subject: Re: readl() / writel() on PowerPC
Date: Mon, 2 Jul 2001 17:54:12 -0700 [thread overview]
Message-ID: <20010702175412.A15774@stm.lbl.gov> (raw)
In-Reply-To: <Pine.SOL.4.21.0106180852480.16027-100000@oscar.cc.gatech.edu> <Pine.SOL.4.21.0107022017370.23357-100000@oscar.cc.gatech.edu>
In-Reply-To: <Pine.SOL.4.21.0107022017370.23357-100000@oscar.cc.gatech.edu>; from eger@cc.gatech.edu on Mon, Jul 02, 2001 at 08:22:55PM -0400
On Mon, Jul 02, 2001 at 08:22:55PM -0400, David T Eger wrote:
>
> I have been working on a driver for a PowerPC PCI card/framebuffer device,
> and noticed that the standard readl() and writel() for this platform to
> byte swapping, since PowerPC runs big-endian. However, at least for my
> hardware it's *really* not needed, and should just do a regular load
> store, as is done for CONFIG_APUS. Looking at another driver
> (drivers/char/bttv.h) I notice that Mr. Metzler redefines his read and
> write routines for PowerPC as well to do simple loads and stores to IO
> regions.
I believe you are looking for __raw_readl(), __raw_writel().
dave...
next prev parent reply other threads:[~2001-07-03 0:54 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-06-18 13:00 New Linux Drivers - Configure question Modular Forms Boy
2001-06-18 13:20 ` Chakir Ettayebi
2001-06-18 21:56 ` James Simmons
2001-07-03 0:22 ` readl() / writel() on PowerPC David T Eger
2001-07-03 0:54 ` David Schleef [this message]
2001-07-03 2:39 ` James Simmons
2001-07-04 7:50 ` Paul Mackerras
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