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Re: video mem access with oskit-mach
From: |
Marcus Brinkmann |
Subject: |
Re: video mem access with oskit-mach |
Date: |
Tue, 2 Oct 2001 22:09:50 +0200 |
User-agent: |
Mutt/1.3.22i |
On Tue, Oct 02, 2001 at 03:54:46PM -0400, Roland McGrath wrote:
> But that's already implemented! The existing iopb code works exactly this
> way. All we have to change is its use of device_t to use a generic
> ipc_port pointer instead.
Fair enough. And you already said that it can get a port matching a
bit mask, so it's as generic as it can get (before I realized that
I was worried about just having a similar set of io port permission
groups as we have with the devices in gnumach).
> Yeah, that's why. You don't hand anybody your task port if you can help
> it. proc has to have it, but nobody else does.
That's a pretty good reason, which I overlooked.
> The more nebulous reasons are that you might get this capability,
> hang on to it for later, pass it to other tasks, etc.
That's not actually an issue, as the server could still hand out such ports
But I see the problems, and why your solution is better.
Thanks,
Marcus
--
`Rhubarb is no Egyptian god.' Debian http://www.debian.org brinkmd@debian.org
Marcus Brinkmann GNU http://www.gnu.org marcus@gnu.org
Marcus.Brinkmann@ruhr-uni-bochum.de
http://www.marcus-brinkmann.de
- video mem and keyboard access with oskit-mach, Marcus Brinkmann, 2001/10/01
- Re: video mem access with oskit-mach, Roland McGrath, 2001/10/01
- Re: video mem access with oskit-mach, Marcus Brinkmann, 2001/10/01
- Re: video mem access with oskit-mach, Roland McGrath, 2001/10/02
- Re: video mem access with oskit-mach, Thomas Bushnell, BSG, 2001/10/02
- Re: video mem access with oskit-mach, Marcus Brinkmann, 2001/10/02
- Re: video mem access with oskit-mach, Roland McGrath, 2001/10/02
- Re: video mem access with oskit-mach,
Marcus Brinkmann <=
- Re: video mem access with oskit-mach, Marcus Brinkmann, 2001/10/03
- Re: video mem access with oskit-mach, Roland McGrath, 2001/10/03
- Re: video mem access with oskit-mach, Marcus Brinkmann, 2001/10/07
- Re: video mem access with oskit-mach, Marcus Brinkmann, 2001/10/07
- Re: video mem access with oskit-mach, Marcus Brinkmann, 2001/10/02
- Re: video mem access with oskit-mach, Marcus Brinkmann, 2001/10/02
- Re: video mem access with oskit-mach, Marcus Brinkmann, 2001/10/03
- Re: video mem access with oskit-mach, Roland McGrath, 2001/10/03
- Re: video mem access with oskit-mach, Marcus Brinkmann, 2001/10/03
- Re: video mem access with oskit-mach, Roland McGrath, 2001/10/03