sim_object.hh revision 5314 
1/*
2 * Copyright (c) 2001-2005 The Regents of The University of Michigan
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met: redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer;
9 * redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution;
12 * neither the name of the copyright holders nor the names of its
13 * contributors may be used to endorse or promote products derived from
14 * this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 *
28 * Authors: Steve Reinhardt
29 *          Nathan Binkert
30 */
31
32/* @file
33 * User Console Definitions
34 */
35
36#ifndef __SIM_OBJECT_HH__
37#define __SIM_OBJECT_HH__
38
39#include <map>
40#include <list>
41#include <vector>
42#include <iostream>
43
44#include "params/SimObject.hh"
45#include "sim/serialize.hh"
46#include "sim/startup.hh"
47
48class BaseCPU;
49class Event;
50
51/*
52 * Abstract superclass for simulation objects.  Represents things that
53 * correspond to physical components and can be specified via the
54 * config file (CPUs, caches, etc.).
55 */
56class SimObject : public Serializable, protected StartupCallback
57{
58  public:
59    enum State {
60        Running,
61        Draining,
62        Drained
63    };
64
65  private:
66    State state;
67
68  protected:
69    void changeState(State new_state) { state = new_state; }
70
71  public:
72    State getState() { return state; }
73
74  private:
75    typedef std::vector<SimObject *> SimObjectList;
76
77    // list of all instantiated simulation objects
78    static SimObjectList simObjectList;
79
80  protected:
81    const SimObjectParams *_params;
82
83  public:
84    typedef SimObjectParams Params;
85    const Params *params() const { return _params; }
86    SimObject(const Params *_params);
87    virtual ~SimObject() {}
88
89  protected:
90    // static: support for old-style constructors (call manually)
91    static Params *makeParams(const std::string &name);
92
93  public:
94
95    virtual const std::string name() const { return params()->name; }
96
97    // initialization pass of all objects.
98    // Gets invoked after construction, before unserialize.
99    virtual void init();
100    static void initAll();
101
102    // register statistics for this object
103    virtual void regStats();
104    virtual void regFormulas();
105    virtual void resetStats();
106
107    // static: call reg_stats on all SimObjects
108    static void regAllStats();
109
110    // static: call resetStats on all SimObjects
111    static void resetAllStats();
112
113    // static: call nameOut() & serialize() on all SimObjects
114    static void serializeAll(std::ostream &);
115    static void unserializeAll(Checkpoint *cp);
116
117    // Methods to drain objects in order to take checkpoints
118    // Or switch from timing -> atomic memory model
119    // Drain returns 0 if the simobject can drain immediately or
120    // the number of times the drain_event's process function will be called
121    // before the object will be done draining. Normally this should be 1
122    virtual unsigned int drain(Event *drain_event);
123    virtual void resume();
124    virtual void setMemoryMode(State new_mode);
125    virtual void switchOut();
126    virtual void takeOverFrom(BaseCPU *cpu);
127
128#ifdef DEBUG
129  public:
130    bool doDebugBreak;
131    static void debugObjectBreak(const std::string &objs);
132#endif
133
134    /**
135     * Find the SimObject with the given name and return a pointer to
136     * it.  Priarily used for interactive debugging.  Argument is
137     * char* rather than std::string to make it callable from gdb.
138     */
139    static SimObject *find(const char *name);
140
141  public:
142    void recordEvent(const std::string &stat);
143};
144
145#endif // __SIM_OBJECT_HH__
146