thread_state.hh revision 2329 
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_O3_THREAD_STATE_HH__
30#define __CPU_O3_THREAD_STATE_HH__
31
32#include "arch/faults.hh"
33#include "arch/isa_traits.hh"
34#include "cpu/exec_context.hh"
35#include "cpu/thread_state.hh"
36
37class Event;
38class Process;
39
40#if FULL_SYSTEM
41class EndQuiesceEvent;
42class FunctionProfile;
43class ProfileNode;
44#else
45class FunctionalMemory;
46class Process;
47#endif
48
49/**
50 * Class that has various thread state, such as the status, the
51 * current instruction being processed, whether or not the thread has
52 * a trap pending or is being externally updated, the ExecContext
53 * proxy pointer, etc.  It also handles anything related to a specific
54 * thread's process, such as syscalls and checking valid addresses.
55 */
56template <class Impl>
57struct O3ThreadState : public ThreadState {
58    typedef ExecContext::Status Status;
59    typedef typename Impl::FullCPU FullCPU;
60
61    Status _status;
62
63    // Current instruction
64    TheISA::MachInst inst;
65  private:
66    FullCPU *cpu;
67  public:
68
69    bool inSyscall;
70
71    bool trapPending;
72
73#if FULL_SYSTEM
74    O3ThreadState(FullCPU *_cpu, int _thread_num, FunctionalMemory *_mem)
75        : ThreadState(-1, _thread_num, _mem),
76          inSyscall(0), trapPending(0)
77    { }
78#else
79    O3ThreadState(FullCPU *_cpu, int _thread_num, Process *_process, int _asid)
80        : ThreadState(-1, _thread_num, _process->getMemory(), _process, _asid),
81          cpu(_cpu), inSyscall(0), trapPending(0)
82    { }
83
84    O3ThreadState(FullCPU *_cpu, int _thread_num, FunctionalMemory *_mem,
85                  int _asid)
86        : ThreadState(-1, _thread_num, _mem, NULL, _asid),
87          cpu(_cpu), inSyscall(0), trapPending(0)
88    { }
89#endif
90
91    ExecContext *xcProxy;
92
93    ExecContext *getXCProxy() { return xcProxy; }
94
95    Status status() const { return _status; }
96
97    void setStatus(Status new_status) { _status = new_status; }
98
99#if !FULL_SYSTEM
100    bool validInstAddr(Addr addr)
101    { return process->validInstAddr(addr); }
102
103    bool validDataAddr(Addr addr)
104    { return process->validDataAddr(addr); }
105#endif
106
107    bool misspeculating() { return false; }
108
109    void setInst(TheISA::MachInst _inst) { inst = _inst; }
110
111    Counter readFuncExeInst() { return funcExeInst; }
112
113    void setFuncExeInst(Counter new_val) { funcExeInst = new_val; }
114
115#if !FULL_SYSTEM
116    void syscall() { process->syscall(xcProxy); }
117#endif
118};
119
120#endif // __CPU_O3_THREAD_STATE_HH__
121