From: Nicolas Pitre <nico@cam.org>
To: Franck <vagabon.xyz@gmail.com>
Cc: lkml <linux-kernel@vger.kernel.org>
Subject: Re: How can I prevent MTD to access the end of a flash device ?
Date: Mon, 28 Nov 2005 11:55:10 -0500 (EST) [thread overview]
Message-ID: <Pine.LNX.4.64.0511281151010.6022@localhost.localdomain> (raw)
In-Reply-To: <cda58cb80511240032q7e4fbc67l@mail.gmail.com>
On Thu, 24 Nov 2005, Franck wrote:
> > Yes. It was tested on ARM only though. Some architectures like i386
> > for example might need special tricks to implement this.
> >
>
> do you know why ?
Apparently i386 might have issues having two virtual mappings for the
same physical address range. This can be worked around in the map
driver by relying on the knowledge of flash aliases on the bus.
> What was the gain on ARM ?
The ability to use burst transfers which are only activated with cached
memory, hence twice the read speed or more.
Nicolas
next prev parent reply other threads:[~2005-11-28 16:55 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <cda58cb80511070248o6d7a18bex@mail.gmail.com>
2005-11-22 14:58 ` Franck
2005-11-22 15:21 ` Josh Boyer
2005-11-22 15:53 ` Nicolas Pitre
2005-11-24 8:32 ` Franck
2005-11-28 16:55 ` Nicolas Pitre [this message]
2006-04-23 17:06 ` Franck Bui-Huu
2006-04-23 17:24 ` Nicolas Pitre
2006-04-23 18:57 ` Franck Bui-Huu
2006-04-24 15:40 ` David Woodhouse
2006-04-24 16:12 ` Franck Bui-Huu
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