thread_state.hh revision 2669:f2b336e89d2a 
1/*
2 * Copyright (c) 2006 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
29#ifndef __CPU_THREAD_STATE_HH__
30#define __CPU_THREAD_STATE_HH__
31
32#include "cpu/exec_context.hh"
33
34#if FULL_SYSTEM
35class EndQuiesceEvent;
36class FunctionProfile;
37class ProfileNode;
38namespace Kernel {
39    class Statistics;
40};
41#else
42class FunctionalMemory;
43class Process;
44#endif
45
46/**
47 *  Struct for holding general thread state that is needed across CPU
48 *  models.  This includes things such as pointers to the process,
49 *  memory, quiesce events, and certain stats.  This can be expanded
50 *  to hold more thread-specific stats within it.
51 */
52struct ThreadState {
53#if FULL_SYSTEM
54    ThreadState(int _cpuId, int _tid, FunctionalMemory *_mem)
55        : cpuId(_cpuId), tid(_tid), mem(_mem), lastActivate(0), lastSuspend(0),
56          profile(NULL), profileNode(NULL), profilePC(0), quiesceEvent(NULL)
57#else
58    ThreadState(int _cpuId, int _tid, FunctionalMemory *_mem,
59                Process *_process, short _asid)
60        : cpuId(_cpuId), tid(_tid), mem(_mem), process(_process), asid(_asid)
61#endif
62    {
63        funcExeInst = 0;
64        storeCondFailures = 0;
65    }
66
67    ExecContext::Status status;
68
69    int cpuId;
70
71    // Index of hardware thread context on the CPU that this represents.
72    int tid;
73
74    Counter numInst;
75    Stats::Scalar<> numInsts;
76    Stats::Scalar<> numMemRefs;
77
78    // number of simulated loads
79    Counter numLoad;
80    Counter startNumLoad;
81
82    FunctionalMemory *mem;	// functional storage for process address space
83
84#if FULL_SYSTEM
85    Tick lastActivate;
86    Tick lastSuspend;
87
88    FunctionProfile *profile;
89    ProfileNode *profileNode;
90    Addr profilePC;
91
92    EndQuiesceEvent *quiesceEvent;
93
94    Kernel::Statistics *kernelStats;
95#else
96    Process *process;
97
98    // Address space ID.  Note that this is used for TIMING cache
99    // simulation only; all functional memory accesses should use
100    // one of the FunctionalMemory pointers above.
101    short asid;
102
103#endif
104
105    /**
106     * Temporary storage to pass the source address from copy_load to
107     * copy_store.
108     * @todo Remove this temporary when we have a better way to do it.
109     */
110    Addr copySrcAddr;
111    /**
112     * Temp storage for the physical source address of a copy.
113     * @todo Remove this temporary when we have a better way to do it.
114     */
115    Addr copySrcPhysAddr;
116
117    /*
118     * number of executed instructions, for matching with syscall trace
119     * points in EIO files.
120     */
121    Counter funcExeInst;
122
123    //
124    // Count failed store conditionals so we can warn of apparent
125    // application deadlock situations.
126    unsigned storeCondFailures;
127};
128
129#endif // __CPU_THREAD_STATE_HH__
130