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/*
* Copyright (c) 2001-2005 The Regents of The University of Michigan
* Copyright (c) 2010 Advanced Micro Devices, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met: redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer;
* redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution;
* neither the name of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* Authors: Steve Reinhardt
* Nathan Binkert
*/
/* @file
* User Console Definitions
*/
#ifndef __SIM_OBJECT_HH__
#define __SIM_OBJECT_HH__
#include <iostream>
#include <list>
#include <map>
#include <string>
#include <vector>
#include "params/SimObject.hh"
#include "sim/eventq.hh"
#include "sim/serialize.hh"
class BaseCPU;
class Event;
/*
* Abstract superclass for simulation objects. Represents things that
* correspond to physical components and can be specified via the
* config file (CPUs, caches, etc.).
*/
class SimObject : public EventManager, public Serializable
{
public:
enum State {
Running,
Draining,
Drained
};
private:
State state;
protected:
void changeState(State new_state) { state = new_state; }
public:
State getState() { return state; }
private:
typedef std::vector<SimObject *> SimObjectList;
// list of all instantiated simulation objects
static SimObjectList simObjectList;
protected:
const SimObjectParams *_params;
public:
typedef SimObjectParams Params;
const Params *params() const { return _params; }
SimObject(const Params *_params);
virtual ~SimObject() {}
public:
virtual const std::string name() const { return params()->name; }
// The following SimObject initialization methods are called from
// the instantiate() method in src/python/m5/simulate.py. See
// that function for details on how/when these methods are
// invoked.
/**
* init() is called after all C++ SimObjects have been created and
* all ports are connected. Initializations that are independent
* of unserialization but rely on a fully instantiated and
* connected SimObject graph should be done here.
*/
virtual void init();
/**
* loadState() is called on each SimObject when restoring from a
* checkpoint. The default implementation simply calls
* unserialize() if there is a corresponding section in the
* checkpoint. However, objects can override loadState() to get
* other behaviors, e.g., doing other programmed initializations
* after unserialize(), or complaining if no checkpoint section is
* found.
*/
virtual void loadState(Checkpoint *cp);
/**
* initState() is called on each SimObject when *not* restoring
* from a checkpoint. This provides a hook for state
* initializations that are only required for a "cold start".
*/
virtual void initState();
// register statistics for this object
virtual void regStats();
virtual void regFormulas();
virtual void resetStats();
/**
* startup() is the final initialization call before simulation.
* All state is initialized (including unserialized state, if any,
* such as the curTick value), so this is the appropriate place to
* schedule initial event(s) for objects that need them.
*/
virtual void startup();
// static: call nameOut() & serialize() on all SimObjects
static void serializeAll(std::ostream &);
static void unserializeAll(Checkpoint *cp);
// Methods to drain objects in order to take checkpoints
// Or switch from timing -> atomic memory model
// Drain returns 0 if the simobject can drain immediately or
// the number of times the drain_event's process function will be called
// before the object will be done draining. Normally this should be 1
virtual unsigned int drain(Event *drain_event);
virtual void resume();
virtual void setMemoryMode(State new_mode);
virtual void switchOut();
virtual void takeOverFrom(BaseCPU *cpu);
#ifdef DEBUG
public:
bool doDebugBreak;
static void debugObjectBreak(const std::string &objs);
#endif
/**
* Find the SimObject with the given name and return a pointer to
* it. Primarily used for interactive debugging. Argument is
* char* rather than std::string to make it callable from gdb.
*/
static SimObject *find(const char *name);
};
#endif // __SIM_OBJECT_HH__
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