1 /*
2 * \brief IRQ session interface
3 * \author Christian Helmuth
4 * \date 2007-09-13
5 *
6 * An open IRQ session represents a valid IRQ attachment/association.
7 * Initially, the interrupt is masked and will only occur if enabled. This is
8 * done by calling wait_for_irq(). When the interrupt is delivered to the
9 * client, it was acknowledged and masked at the interrupt controller before.
10 *
11 * Disassociation from an IRQ is done by closing the session.
12 */
13
14 /*
15 * Copyright (C) 2007-2013 Genode Labs GmbH
16 *
17 * This file is part of the Genode OS framework, which is distributed
18 * under the terms of the GNU General Public License version 2.
19 */
20
21 #ifndef _INCLUDE__IRQ_SESSION__IRQ_SESSION_H_
22 #define _INCLUDE__IRQ_SESSION__IRQ_SESSION_H_
23
24 #include <base/capability.h>
25 #include <session/session.h>
26
27 namespace Genode {
28
29 struct Irq_session : Session
30 {
31
32 /**
33 * Interrupt trigger
34 */
35 enum Trigger { TRIGGER_UNCHANGED = 0, TRIGGER_LEVEL, TRIGGER_EDGE };
36
37 /**
38 * Interrupt trigger polarity
39 */
40 enum Polarity { POLARITY_UNCHANGED = 0, POLARITY_HIGH, POLARITY_LOW };
41
42 static const char *service_name() { return "IRQ"; }
43
44 virtual ~Irq_session() { }
45
46 virtual void wait_for_irq() = 0;
47
48
49 /*********************
50 ** RPC declaration **
51 *********************/
52
53 GENODE_RPC(Rpc_wait_for_irq, void, wait_for_irq);
54 GENODE_RPC_INTERFACE(Rpc_wait_for_irq);
55 };
56 }
57
58 #endif /* _INCLUDE__IRQ_SESSION__IRQ_SESSION_H_ */