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Re: [ppopov@mvista.com: Re: [Linux-mips-kernel]ioremap & ISA]

To: Jun Sun <jsun@mvista.com>
Subject: Re: [ppopov@mvista.com: Re: [Linux-mips-kernel]ioremap & ISA]
From: "Maciej W. Rozycki" <macro@ds2.pg.gda.pl>
Date: Tue, 18 Dec 2001 21:22:50 +0100 (MET)
Cc: Ralf Baechle <ralf@oss.sgi.com>, Jim Paris <jim@jtan.com>, linux-mips@oss.sgi.com
In-reply-to: <3C1F9AD2.1269192E@mvista.com>
Organization: Technical University of Gdansk
Sender: owner-linux-mips@oss.sgi.com
On Tue, 18 Dec 2001, Jun Sun wrote:

> I was thinking most ISA dirvers should simply use inb/outb to access ioports.
> Don't really any ISA devices have their own memory space.  But, anyway, who
> can still remember those dark ages?

 The so called "shared memory" (mapped in the ISA space; usually below
1MB) for frame storage existed on a few models of better ISA Ethernet
boards.  And, of course, VGA boards have memory mapped in the ISA space.
Certain implementations occupy up to 4MB of ISA space when used in a SVGA
mode.

-- 
+  Maciej W. Rozycki, Technical University of Gdansk, Poland   +
+--------------------------------------------------------------+
+        e-mail: macro@ds2.pg.gda.pl, PGP key available        +


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