8291d9db0a
Since the early days of M5, an event needed to know which event queue it was on, and that data was required at the time of construction of the event object. In the future parallelized M5, this sort of requirement does not work well since the proper event queue will not always be known at the time of construction of an event. Now, events are created, and the EventQueue itself has the schedule function, e.g. eventq->schedule(event, when). To simplify the syntax, I created a class called EventManager which holds a pointer to an EventQueue and provides the schedule interface that is a proxy for the EventQueue. The intent is that objects that frequently schedule events can be derived from EventManager and then they have the schedule interface. SimObject and Port are examples of objects that will become EventManagers. The end result is that any SimObject can just call schedule(event, when) and it will just call that SimObject's eventq->schedule function. Of course, some objects may have more than one EventQueue, so this interface might not be perfect for those, but they should be relatively few.
144 lines
4.4 KiB
C++
144 lines
4.4 KiB
C++
/*
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* Copyright (c) 2001-2005 The Regents of The University of Michigan
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met: redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer;
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* redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution;
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* neither the name of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* Authors: Steve Reinhardt
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* Nathan Binkert
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*/
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/* @file
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* User Console Definitions
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*/
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#ifndef __SIM_OBJECT_HH__
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#define __SIM_OBJECT_HH__
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#include <iostream>
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#include <list>
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#include <map>
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#include <string>
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#include <vector>
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#include "params/SimObject.hh"
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#include "sim/eventq.hh"
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#include "sim/serialize.hh"
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#include "sim/startup.hh"
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class BaseCPU;
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class Event;
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/*
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* Abstract superclass for simulation objects. Represents things that
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* correspond to physical components and can be specified via the
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* config file (CPUs, caches, etc.).
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*/
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class SimObject
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: public EventManager, public Serializable, protected StartupCallback
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{
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public:
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enum State {
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Running,
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Draining,
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Drained
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};
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private:
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State state;
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protected:
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void changeState(State new_state) { state = new_state; }
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public:
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State getState() { return state; }
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private:
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typedef std::vector<SimObject *> SimObjectList;
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// list of all instantiated simulation objects
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static SimObjectList simObjectList;
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protected:
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const SimObjectParams *_params;
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public:
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typedef SimObjectParams Params;
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const Params *params() const { return _params; }
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SimObject(const Params *_params);
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virtual ~SimObject() {}
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public:
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virtual const std::string name() const { return params()->name; }
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// initialization pass of all objects.
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// Gets invoked after construction, before unserialize.
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virtual void init();
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static void initAll();
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// register statistics for this object
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virtual void regStats();
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virtual void regFormulas();
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virtual void resetStats();
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// static: call reg_stats on all SimObjects
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static void regAllStats();
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// static: call resetStats on all SimObjects
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static void resetAllStats();
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// static: call nameOut() & serialize() on all SimObjects
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static void serializeAll(std::ostream &);
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static void unserializeAll(Checkpoint *cp);
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// Methods to drain objects in order to take checkpoints
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// Or switch from timing -> atomic memory model
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// Drain returns 0 if the simobject can drain immediately or
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// the number of times the drain_event's process function will be called
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// before the object will be done draining. Normally this should be 1
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virtual unsigned int drain(Event *drain_event);
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virtual void resume();
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virtual void setMemoryMode(State new_mode);
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virtual void switchOut();
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virtual void takeOverFrom(BaseCPU *cpu);
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#ifdef DEBUG
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public:
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bool doDebugBreak;
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static void debugObjectBreak(const std::string &objs);
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#endif
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/**
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* Find the SimObject with the given name and return a pointer to
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* it. Primarily used for interactive debugging. Argument is
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* char* rather than std::string to make it callable from gdb.
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*/
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static SimObject *find(const char *name);
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public:
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void recordEvent(const std::string &stat);
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};
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#endif // __SIM_OBJECT_HH__
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