From: "David S. Miller" <davem@redhat.com>
To: Linus Torvalds <torvalds@osdl.org>
Cc: geert@linux-m68k.org, paulus@samba.org, hch@infradead.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] fix ppc ioremap prototype
Date: Thu, 4 Sep 2003 10:03:43 -0700 [thread overview]
Message-ID: <20030904100343.32c99406.davem@redhat.com> (raw)
In-Reply-To: <Pine.LNX.4.44.0309040958420.6676-100000@home.osdl.org>
On Thu, 4 Sep 2003 10:06:48 -0700 (PDT)
Linus Torvalds <torvalds@osdl.org> wrote:
>
> On Thu, 4 Sep 2003, David S. Miller wrote:
> >
> > > So clearly ioremap() has to work for other buses too.
> >
> > What if they are like I/O ports on x86 and require special
> > instructions to access?
>
> ioremap() is very easy to explain to a mathematician: its "domain" is
> _exactly_ that which is in the "iomem_resource" tree. The "range" is a
> virtual address.
A virtual address? On x86 IOMEM resources are stored as physical
addresses and ioremap() returns a virtual mapping of that physical
address.
Maybe our wires are just crossed.
next prev parent reply other threads:[~2003-09-04 17:14 UTC|newest]
Thread overview: 53+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-09-03 20:32 [PATCH] fix ppc ioremap prototype Christoph Hellwig
2003-09-04 0:33 ` Paul Mackerras
2003-09-04 7:13 ` Christoph Hellwig
2003-09-04 7:25 ` David S. Miller
2003-09-04 7:30 ` Russell King
2003-09-04 7:38 ` Christoph Hellwig
2003-09-04 8:09 ` David S. Miller
2003-09-04 8:12 ` Linus Torvalds
2003-09-04 8:10 ` David S. Miller
2003-09-04 8:28 ` Christoph Hellwig
2003-09-04 10:06 ` Benjamin Herrenschmidt
2003-09-04 11:03 ` Paul Mackerras
2003-09-04 12:21 ` Geert Uytterhoeven
2003-09-04 12:41 ` Paul Mackerras
2003-09-04 12:41 ` David S. Miller
2003-09-04 12:57 ` Geert Uytterhoeven
2003-09-04 15:58 ` Deepak Saxena
2003-09-04 16:15 ` Geert Uytterhoeven
2003-09-04 16:36 ` Jes Sorensen
2003-09-04 23:18 ` Paul Mackerras
2003-09-05 20:56 ` Geert Uytterhoeven
2003-09-04 16:41 ` Linus Torvalds
2003-09-04 16:43 ` David S. Miller
2003-09-04 17:06 ` Linus Torvalds
2003-09-04 17:03 ` David S. Miller [this message]
2003-09-04 17:16 ` Linus Torvalds
2003-09-04 17:13 ` Jeff Garzik
2003-09-04 17:24 ` Linus Torvalds
2003-09-05 8:02 ` Eric W. Biederman
2003-09-04 8:22 ` Christoph Hellwig
2003-09-04 9:29 ` Christoph Hellwig
2003-09-04 10:07 ` Benjamin Herrenschmidt
2003-09-04 9:21 ` Paul Mackerras
2003-09-04 9:36 ` David S. Miller
2003-09-04 9:48 ` Russell King
2003-09-04 9:51 ` Christoph Hellwig
2003-09-04 12:38 ` Paul Mackerras
2003-09-04 12:59 ` Paul Mackerras
2003-09-04 13:01 ` David S. Miller
2003-09-04 14:15 ` Matt Porter
2003-09-04 14:12 ` David S. Miller
2003-09-04 13:30 ` Russell King
2003-09-04 15:50 ` Deepak Saxena
2003-09-04 16:09 ` David S. Miller
2003-09-04 10:34 ` Alan Cox
2003-09-04 10:33 ` David S. Miller
2003-09-04 12:42 ` Jeff Garzik
2003-09-04 12:43 ` David S. Miller
2003-09-04 14:36 ` Matt Porter
2003-09-04 14:30 ` David S. Miller
2003-09-04 15:26 ` Matt Porter
2003-09-04 16:03 ` David S. Miller
2003-09-04 15:35 ` Linus Torvalds
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