From ee171038e27e5288e6606f8affb20faabd6daf40 Mon Sep 17 00:00:00 2001 From: Thomas Schwinge Date: Tue, 21 Jul 2009 20:06:47 +0200 Subject: open_issues/user-space_device_drivers: Event objects. --- open_issues/user-space_device_drivers.mdwn | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'open_issues') diff --git a/open_issues/user-space_device_drivers.mdwn b/open_issues/user-space_device_drivers.mdwn index 43795705..33e75942 100644 --- a/open_issues/user-space_device_drivers.mdwn +++ b/open_issues/user-space_device_drivers.mdwn @@ -27,6 +27,11 @@ Also see [[device drivers and IO systems]]. * *Omega0* paper defines an interface. + * As is can be read in the *Mach 3 Kernel Principles*, there is an *event + object* facility in Mach that can be used for having user-space tasks react + to IRQs. However, at least in GNU Mach, that code (`kern/eventcount.c`) + doesn't seem functional at all and isn't integrated properly in the kernel. + ## DMA * Security considerations. -- cgit v1.2.3