path: root/microkernel
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authorJustus Winter <>2016-10-12 10:10:19 +0200
committerJustus Winter <>2016-10-12 11:45:55 +0200
commitc97ee062c33ec8cbd90d6e98ee68c68e75697d69 (patch)
treec5a5b99843bf7357a84ffd2e6141ec20fe4f08cf /microkernel
parent0ca46c502ac0f37d818d9b8c4748b8189c31a1c3 (diff)
Add interface for user-space drivers
Diffstat (limited to 'microkernel')
1 files changed, 26 insertions, 0 deletions
diff --git a/microkernel/mach/gnumach/projects/mach_5.mdwn b/microkernel/mach/gnumach/projects/mach_5.mdwn
index b90f04d5..7b59170b 100644
--- a/microkernel/mach/gnumach/projects/mach_5.mdwn
+++ b/microkernel/mach/gnumach/projects/mach_5.mdwn
@@ -19,6 +19,8 @@ it, we could straighten out some of these problems.
This page is a place to keep track of such changes.
+[[!toc startlevel=2 levels=1]]
## Protected payloads
Protected payloads are a way of optimizing the receiver object lookup
@@ -135,3 +137,27 @@ A prototype exists.
* <>
* <>
+## Interface for userspace drivers
+We need to provide an interface suitable for implementing drivers in
+* A way to handle interrupts
+* and a way to allocate memory suitable for DMA buffers
+### Required ABI changes
+None. This is a new interface. Debian/Hurd uses a non-standard rpc
+id, so we do not change an existing procedure there.
+### Status
+A DDE-based solution is used in Debian/Hurd to provide network
+drivers. A rump kernel prototype is implemented. These use a kernel
+interface written by Zheng Da available in the
+"master-user_level_drivers" branch in the GNU Mach repository.
+### Discussions
+* <>