From: Eugene Surovegin <ebs@ebshome.net>
To: John Whitney <johnw@sands-edge.com>
Cc: linuxppc-dev@lists.linuxppc.org
Subject: Re: Proposed changes to io.h
Date: Wed, 31 Mar 2004 08:44:23 -0800 [thread overview]
Message-ID: <20040331164423.GA417@gate.ebshome.net> (raw)
In-Reply-To: <49B568CB-832A-11D8-9FF0-000A95A07384@sands-edge.com>
On Wed, Mar 31, 2004 at 10:44:25AM -0500, John Whitney wrote:
> 2. I'd like to add 64-bit __raw_readll and __raw_writell routines to
> io.h, done using floating-point registers. Currently, modules such as
> MTD (when writing to 64-bit buses) perform two 32-bit, non-atomic
> writes, which can cause problems. Using a floating-point register to
> guarantee a 64-bit write is ugly, but it works. Code for these inlined
> routines is as follows:
[snip]
I wonder will it work on 4xx CPUs which don't have floating point unit?
Eugene.
** Sent via the linuxppc-dev mail list. See http://lists.linuxppc.org/
next prev parent reply other threads:[~2004-03-31 16:44 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-03-31 15:44 Proposed changes to io.h John Whitney
2004-03-31 16:44 ` Eugene Surovegin [this message]
2004-03-31 16:58 ` Dan Malek
2004-03-31 17:30 ` Matt Porter
2004-03-31 17:32 ` John Whitney
2004-03-31 17:40 ` Dan Malek
2004-03-31 17:03 ` Matt Porter
2004-03-31 19:57 ` John Whitney
2004-03-31 22:07 ` Matt Porter
2004-03-31 22:25 ` John Whitney
2004-03-31 22:52 ` Dan Malek
2004-04-01 5:30 ` Kumar Gala
2004-03-31 17:01 ` Matt Porter
2004-03-31 17:29 ` Dan Malek
2004-03-31 18:18 ` Christoph Hellwig
2004-03-31 18:40 ` John Whitney
2004-03-31 18:43 ` Christoph Hellwig
2004-03-31 18:50 ` John Whitney
2004-03-31 21:09 ` John Whitney
2004-03-31 21:49 ` Dan Malek
2004-03-31 21:52 ` Eugene Surovegin
2004-03-31 22:07 ` John Whitney
2004-04-01 2:52 ` Benjamin Herrenschmidt
[not found] ` <209F76E4-838B-11D8-9FF0-000A95A07384@sands-edge.com>
[not found] ` <1080790433.1433.59.camel@gaston>
[not found] ` <43B0E668-84BC-11D8-9FF0-000A95A07384@sands-edge.com>
2004-04-03 3:04 ` Benjamin Herrenschmidt
2004-04-03 3:40 ` John Whitney
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