thread_state.hh revision 8766 
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 * Authors: Kevin Lim
29 */
30
31#ifndef __CPU_O3_THREAD_STATE_HH__
32#define __CPU_O3_THREAD_STATE_HH__
33
34#include "base/callback.hh"
35#include "base/output.hh"
36#include "cpu/thread_context.hh"
37#include "cpu/thread_state.hh"
38#include "sim/sim_exit.hh"
39
40class Event;
41class Process;
42
43#if FULL_SYSTEM
44class EndQuiesceEvent;
45class FunctionProfile;
46class ProfileNode;
47#else
48class FunctionalMemory;
49class Process;
50#endif
51
52/**
53 * Class that has various thread state, such as the status, the
54 * current instruction being processed, whether or not the thread has
55 * a trap pending or is being externally updated, the ThreadContext
56 * pointer, etc.  It also handles anything related to a specific
57 * thread's process, such as syscalls and checking valid addresses.
58 */
59template <class Impl>
60struct O3ThreadState : public ThreadState {
61    typedef ThreadContext::Status Status;
62    typedef typename Impl::O3CPU O3CPU;
63
64  private:
65    /** Pointer to the CPU. */
66    O3CPU *cpu;
67  public:
68    /** Whether or not the thread is currently in syscall mode, and
69     * thus able to be externally updated without squashing.
70     */
71    bool inSyscall;
72
73    /** Whether or not the thread is currently waiting on a trap, and
74     * thus able to be externally updated without squashing.
75     */
76    bool trapPending;
77
78    O3ThreadState(O3CPU *_cpu, int _thread_num, Process *_process)
79        : ThreadState(_cpu, _thread_num, _process),
80          cpu(_cpu), inSyscall(0), trapPending(0)
81    {
82#if FULL_SYSTEM
83        if (cpu->params()->profile) {
84            profile = new FunctionProfile(cpu->params()->system->kernelSymtab);
85            Callback *cb =
86                new MakeCallback<O3ThreadState,
87                &O3ThreadState::dumpFuncProfile>(this);
88            registerExitCallback(cb);
89        }
90
91        // let's fill with a dummy node for now so we don't get a segfault
92        // on the first cycle when there's no node available.
93        static ProfileNode dummyNode;
94        profileNode = &dummyNode;
95        profilePC = 3;
96#endif
97    }
98
99    /** Pointer to the ThreadContext of this thread. */
100    ThreadContext *tc;
101
102    /** Returns a pointer to the TC of this thread. */
103    ThreadContext *getTC() { return tc; }
104
105#if !FULL_SYSTEM
106    /** Handles the syscall. */
107    void syscall(int64_t callnum) { process->syscall(callnum, tc); }
108#endif
109
110#if FULL_SYSTEM
111    void dumpFuncProfile()
112    {
113        std::ostream *os = simout.create(csprintf("profile.%s.dat", cpu->name()));
114        profile->dump(tc, *os);
115    }
116#endif
117};
118
119#endif // __CPU_O3_THREAD_STATE_HH__
120