faults.hh revision 11877:5ea85692a53e 
1/*
2 * Copyright (c) 2003-2005 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: Nathan Binkert
29 *          Gabe Black
30 */
31
32#ifndef __FAULTS_HH__
33#define __FAULTS_HH__
34
35#include "base/types.hh"
36#include "cpu/static_inst.hh"
37#include "sim/stats.hh"
38
39class ThreadContext;
40
41typedef const char * FaultName;
42typedef Stats::Scalar FaultStat;
43
44class FaultBase
45{
46  public:
47    virtual FaultName name() const = 0;
48    virtual void invoke(ThreadContext * tc, const StaticInstPtr &inst =
49                        StaticInst::nullStaticInstPtr);
50};
51
52class UnimpFault : public FaultBase
53{
54  private:
55    std::string panicStr;
56  public:
57    UnimpFault(std::string _str)
58        : panicStr(_str)
59    { }
60
61    FaultName name() const { return "Unimplemented simulator feature"; }
62    void invoke(ThreadContext * tc, const StaticInstPtr &inst =
63                StaticInst::nullStaticInstPtr);
64};
65
66class ReExec : public FaultBase
67{
68  public:
69    virtual FaultName name() const { return "Re-execution fault"; }
70    ReExec() {}
71    void invoke(ThreadContext *tc, const StaticInstPtr &inst =
72                StaticInst::nullStaticInstPtr);
73};
74
75/*
76 * This class is needed to allow system call retries to occur for blocking
77 * system calls in SE mode. A retry fault will be generated by the system call
78 * emulation code if blocking conditions arise; the fault is passed up the
79 * function call chain into the CPU model where it is handled by retrying the
80 * syscall instruction on a later tick.
81 */
82class SyscallRetryFault : public FaultBase
83{
84  public:
85    virtual FaultName name() const { return "System call retry fault"; }
86    SyscallRetryFault() {}
87    void invoke(ThreadContext *tc, const StaticInstPtr &inst =
88                StaticInst::nullStaticInstPtr);
89};
90
91class GenericPageTableFault : public FaultBase
92{
93  private:
94    Addr vaddr;
95  public:
96    FaultName name() const { return "Generic page table fault"; }
97    GenericPageTableFault(Addr va) : vaddr(va) {}
98    void invoke(ThreadContext * tc, const StaticInstPtr &inst =
99                StaticInst::nullStaticInstPtr);
100};
101
102class GenericAlignmentFault : public FaultBase
103{
104  private:
105    Addr vaddr;
106  public:
107    FaultName name() const { return "Generic alignment fault"; }
108    GenericAlignmentFault(Addr va) : vaddr(va) {}
109    void invoke(ThreadContext * tc, const StaticInstPtr &inst =
110                StaticInst::nullStaticInstPtr);
111};
112
113#endif // __FAULTS_HH__
114