From: Mats Karlssohn <mats@mida.se>
Subject: Re: Ada OS Kernel features
Date: Wed, 12 Sep 2001 09:12:14 +0200
Date: 2001-09-12T09:12:14+02:00 [thread overview]
Message-ID: <3B9F0ACE.5BE70C25@mida.se> (raw)
In-Reply-To: slrn9ph0md.mou.d97svema@licia.dtek.chalmers.se
Mattias Svensson wrote:
%<
> Why? If the video driver has exclusive access to the video memory and
> just presents an API to other programs by some menas of IPC. In what
> way is this different from having the video driver in the kernel?
> The hard part I think is to give access to the video memory from
> userspace.
Not really, at least on IA-32. The I/O address space can be delegated
to user processes on a per-address basis. Memory can be delegated on
a page (fixed size) or segment (can be of variable size) basis.
--
Mats Karlssohn, developer mailto:mats@mida.se
Mida Systemutveckling AB http://www.mida.se
Box 64, S-732 22 ARBOGA, SWEDEN
Phone: +46-(0)589-89808 Fax: +46-(0)589-89809
next prev parent reply other threads:[~2001-09-12 7:12 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-09-05 5:58 Ada OS Kernel features Brian Catlin
2001-09-05 10:15 ` Jacob Sparre Andersen
2001-09-05 11:16 ` Larry Kilgallen
2001-09-05 17:06 ` Brian Catlin
2001-09-06 14:35 ` Marin David Condic
2001-09-07 9:31 ` Tarjei T. Jensen
2001-09-05 17:55 ` David Starner
2001-09-05 18:42 ` Darren New
2001-09-12 6:47 ` Mats Karlssohn
2001-09-05 14:04 ` Ted Dennison
2001-09-05 17:23 ` Brian Catlin
2001-09-05 20:17 ` Ted Dennison
2001-09-05 21:10 ` Brian Catlin
2001-09-06 6:45 ` Tarjei T. Jensen
2001-09-06 6:56 ` Brian Catlin
2001-09-06 14:05 ` Ted Dennison
2001-09-05 16:02 ` Alfred Hilscher
2001-09-05 16:19 ` Jacob Sparre Andersen
2001-09-05 17:58 ` Brian Catlin
2001-09-05 17:44 ` Brian Catlin
2001-09-05 17:58 ` Darren New
2001-09-05 18:51 ` Larry Kilgallen
2001-09-05 19:25 ` chris.danx
2001-09-05 20:07 ` Darren New
2001-09-05 20:14 ` Larry Kilgallen
2001-09-06 13:45 ` Alfred Hilscher
2001-09-06 18:06 ` chris.danx
2001-09-06 19:41 ` Larry Kilgallen
2001-09-06 22:32 ` chris.danx
2001-09-07 11:04 ` Larry Kilgallen
2001-09-07 8:04 ` Dmitry Kazakov
2001-09-07 8:18 ` Mattias Svensson
2001-09-07 12:40 ` Dmitry Kazakov
2001-09-12 7:12 ` Mats Karlssohn [this message]
2001-09-05 20:18 ` Brian Catlin
2001-09-06 6:48 ` Ole-Hjalmar Kristensen
2001-09-06 6:59 ` Brian Catlin
2001-09-10 7:32 ` Ole-Hjalmar Kristensen
2001-09-06 13:42 ` Alfred Hilscher
2001-09-07 8:13 ` Dmitry Kazakov
2001-09-08 3:55 ` Kenneth Almquist
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