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117 lines
2.7 KiB
C++
117 lines
2.7 KiB
C++
/*
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* \brief IRQ session interface
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* \author Christian Helmuth
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* \author Martin Stein
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* \date 2007-09-13
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*
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* An open IRQ session represents a valid IRQ attachment/association.
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* Initially, the interrupt is masked and will only occur if enabled. This is
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* done by calling ack_irq().
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*
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* Disassociation from an IRQ is done by closing the session.
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*/
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/*
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* Copyright (C) 2007-2017 Genode Labs GmbH
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*
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* This file is part of the Genode OS framework, which is distributed
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* under the terms of the GNU Affero General Public License version 3.
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*/
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#ifndef _INCLUDE__IRQ_SESSION__IRQ_SESSION_H_
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#define _INCLUDE__IRQ_SESSION__IRQ_SESSION_H_
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#include <base/signal.h>
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#include <base/capability.h>
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#include <session/session.h>
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namespace Genode {
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struct Irq_session;
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}
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struct Genode::Irq_session : Session
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{
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struct Info {
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enum Type { INVALID, MSI } type;
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unsigned long address;
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unsigned long value;
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};
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/**
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* Interrupt trigger
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*/
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enum Trigger { TRIGGER_UNCHANGED = 0, TRIGGER_LEVEL, TRIGGER_EDGE };
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/**
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* Interrupt trigger polarity
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*/
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enum Polarity { POLARITY_UNCHANGED = 0, POLARITY_HIGH, POLARITY_LOW };
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/**
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* Destructor
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*/
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virtual ~Irq_session() { }
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/**
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* Acknowledge handling of last interrupt - re-enables interrupt reception
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*/
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virtual void ack_irq() = 0;
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/**
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* Register irq signal handler
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*/
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virtual void sigh(Genode::Signal_context_capability sigh) = 0;
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/**
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* Request information about IRQ, e.g. on x86 request MSI address and
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* MSI value to be programmed to device specific PCI registers.
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*/
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virtual Info info() = 0;
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/*************
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** Session **
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*************/
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/**
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* \noapi
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*/
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static const char * service_name() { return "IRQ"; }
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enum { CAP_QUOTA = 3, RAM_QUOTA = 6 * 1024 };
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/*********************
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** RPC declaration **
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*********************/
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GENODE_RPC(Rpc_ack_irq, void, ack_irq);
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GENODE_RPC(Rpc_sigh, void, sigh, Genode::Signal_context_capability);
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GENODE_RPC(Rpc_info, Info, info);
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GENODE_RPC_INTERFACE(Rpc_ack_irq, Rpc_sigh, Rpc_info);
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};
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namespace Genode {
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static inline void print(Output &out, Irq_session::Trigger value)
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{
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switch (value) {
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case Irq_session::TRIGGER_UNCHANGED: print(out, "UNCHANGED"); break;
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case Irq_session::TRIGGER_LEVEL: print(out, "LEVEL"); break;
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case Irq_session::TRIGGER_EDGE: print(out, "EDGE"); break;
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}
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}
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static inline void print(Output &out, Irq_session::Polarity value)
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{
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switch (value) {
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case Irq_session::POLARITY_UNCHANGED: print(out, "UNCHANGED"); break;
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case Irq_session::POLARITY_HIGH: print(out, "HIGH"); break;
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case Irq_session::POLARITY_LOW: print(out, "LOW"); break;
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}
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}
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}
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#endif /* _INCLUDE__IRQ_SESSION__IRQ_SESSION_H_ */
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