blob: 5443accd9baf861304a286fd805281d140682ad3 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
|
(** evtchn.ml
*
* event channel interface
*
* @author copyright (c) 2005 alex ho
* @see <www.cl.cam.ac.uk/netos/pdb> pervasive debugger
* @version 1
*)
let dev_name = "/dev/xen/evtchn" (* EVTCHN_DEV_NAME *)
let dev_major = 10 (* EVTCHN_DEV_MAJOR *)
let dev_minor = 201 (* EVTCHN_DEV_MINOR *)
let virq_pdb = 6 (* as defined VIRQ_PDB *)
external bind_virq : int -> int = "evtchn_bind_virq"
external bind : Unix.file_descr -> int -> unit = "evtchn_bind"
external unbind : Unix.file_descr -> int -> unit = "evtchn_unbind"
external ec_open : string -> int -> int -> Unix.file_descr = "evtchn_open"
external read : Unix.file_descr -> int = "evtchn_read"
external ec_close : Unix.file_descr -> unit = "evtchn_close"
external unmask : Unix.file_descr -> int -> unit = "evtchn_unmask"
let setup () =
let port = bind_virq virq_pdb in
let fd = ec_open dev_name dev_major dev_minor in
bind fd port;
fd
let teardown fd =
unbind fd virq_pdb;
ec_close fd
|
