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Re: userspace drivers

From: Marcus Brinkmann
Subject: Re: userspace drivers
Date: Fri, 31 Jan 2003 21:08:40 +0100
User-agent: Mutt/1.5.3i

On Fri, Jan 31, 2003 at 04:36:35PM +0100, Robert Millan wrote:
> I've read the IO section and doesn't realy seem a useful interface. any plans
> to provide ioperm ()?

ioperm is supported in GNU Mach v2, that's what I implemented a year ago
(and I think it is in the GNU Mach manual, although I am not sure).
GNU Mach v1 pathetically doesn't restrict I/O access at all (we could easily
revert that to prevent all I/O access, though).

The question of user interrupt handlers: There is an interface, but I don't
think it was ever tried in GNU Mach, so I don't know if that works or can be
resurrected.  In any case user space drivers are only interesting in a more
modern microkernel like L4.


`Rhubarb is no Egyptian god.' GNU      http://www.gnu.org    marcus@gnu.org
Marcus Brinkmann              The Hurd http://www.gnu.org/software/hurd/

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