From: Ben Dooks <ben@fluff.org.uk>
To: Steven Scholz <steven.scholz@imc-berlin.de>
Cc: MTD List <linux-mtd@lists.infradead.org>
Subject: Re: ioremap_cached in drivers/mtd/maps ?
Date: Mon, 21 Feb 2005 09:31:00 +0000 [thread overview]
Message-ID: <20050221093100.GF28744@home.fluff.org> (raw)
In-Reply-To: <421998DA.1060503@imc-berlin.de>
On Mon, Feb 21, 2005 at 09:16:26AM +0100, Steven Scholz wrote:
> Hi there,
>
> it looks like only lubbock-flash.c is using ioremap_cached().
>
> Can I use ioremap_cached() with normal NOR flashes?
> Is it only for DMA transfer from/to flash?
you could use it for such, but it also allows an cached
area for flash read, which makes it faster to execute
code from.
> Does it improve something when using JFFS2?
> What do I have to consider? .inval_cache function?
It allows the mapping driver to have a seperate read-only
cached area, the .inval_cache function is needed to flush
this area when writes happen to the un-cached area.
--
Ben (ben@fluff.org, http://www.fluff.org/)
'a smiley only costs 4 bytes'
next prev parent reply other threads:[~2005-02-21 9:31 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-02-21 8:16 ioremap_cached in drivers/mtd/maps ? Steven Scholz
2005-02-21 9:31 ` Ben Dooks [this message]
2005-02-21 16:05 ` Nicolas Pitre
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