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User-space device drivers: ``interface to interrupt hardware'' (was: wri

From: Thomas Schwinge
Subject: User-space device drivers: ``interface to interrupt hardware'' (was: writing device drivers in Java)
Date: Tue, 18 Sep 2007 21:09:15 +0200
User-agent: Mutt/1.5.11


On Tue, Sep 18, 2007 at 08:58:56PM +0200, I wrote:
> No framework for user-space device drivers exists so far.  This has to
> be designed and impemented first

> If someone is still interested in working on this user space device
> driver effort, then go for it!

I'm also interested in that, I may add.  I was -- already some months
ago; then I had to interrupt because of more stringent issues taking over
-- thinking about attempting such a project, starting with reading papers
about (a proposal for?) L4's way of handling hardware interrupts in user
space servers.  <http://os.inf.tu-dresden.de/~hohmuth/prj/omega0.ps.gz>
-- ``Omega0 -- a portable interface to interrupt hardware for L4
systems.'' by J. Löser and M. Hohmuth.

Can any of the L4-savvy people (Marcus?, Neal?) comment on this?  Is this
feasible for Mach as well?  Is this what L4 is still using?  I can see
code for this in the TU Dresden L4 repository, so i guess they're
actually actively using this proposed interface?

What is Minix doing?  Or other microkernel-based systems?


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