summaryrefslogtreecommitdiff
path: root/src/arch/arm/linux/system.hh
blob: 709776ffcecdc9aaedfefb89823f003ce99e763d (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
/*
 * Copyright (c) 2010-2013 ARM Limited
 * All rights reserved
 *
 * The license below extends only to copyright in the software and shall
 * not be construed as granting a license to any other intellectual
 * property including but not limited to intellectual property relating
 * to a hardware implementation of the functionality of the software
 * licensed hereunder.  You may use the software subject to the license
 * terms below provided that you ensure that this notice is replicated
 * unmodified and in its entirety in all distributions of the software,
 * modified or unmodified, in source code or in binary form.
 *
 * Copyright (c) 2002-2005 The Regents of The University of Michigan
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met: redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer;
 * redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution;
 * neither the name of the copyright holders nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * Authors: Ali Saidi
 */

#ifndef __ARCH_ARM_LINUX_SYSTEM_HH__
#define __ARCH_ARM_LINUX_SYSTEM_HH__

#include <cstdio>
#include <map>
#include <string>
#include <vector>

#include "arch/arm/system.hh"
#include "base/output.hh"
#include "kern/linux/events.hh"
#include "params/LinuxArmSystem.hh"
#include "sim/core.hh"

class DumpStatsPCEvent;

class LinuxArmSystem : public GenericArmSystem
{
  protected:
    DumpStatsPCEvent *dumpStatsPCEvent;

  public:
    /** Boilerplate params code */
    typedef LinuxArmSystemParams Params;
    const Params *
    params() const
    {
        return dynamic_cast<const Params *>(_params);
    }

    /** When enabled, dump stats/task info on context switches for
     *  Streamline and per-thread cache occupancy studies, etc. */
    bool enableContextSwitchStatsDump;

    /** This map stores a mapping of OS process IDs to internal Task IDs. The
     * mapping is done because the stats system doesn't tend to like vectors
     * that are much greater than 1000 items and the entire process space is
     * 65K. */
    std::map<uint32_t, uint32_t> taskMap;

    /** This is a file that is placed in the run directory that prints out
     * mappings between taskIds and OS process IDs */
    OutputStream* taskFile;

    LinuxArmSystem(Params *p);
    ~LinuxArmSystem();

    void initState();

    void startup();

    /** This function creates a new task Id for the given pid.
     * @param tc thread context that is currentyl executing  */
    void mapPid(ThreadContext* tc, uint32_t pid);

  public: // Exported Python methods
    /**
     * Dump the kernel's dmesg buffer to stdout
     */
    void dumpDmesg();

  private:
    /** Event to halt the simulator if the kernel calls panic()  */
    PCEvent *kernelPanicEvent;

    /** Event to halt the simulator if the kernel calls oopses  */
    PCEvent *kernelOopsEvent;

    /**
     * PC based event to skip udelay(<time>) calls and quiesce the
     * processor for the appropriate amount of time. This is not functionally
     * required but does speed up simulation.
     */
    Linux::UDelayEvent *uDelaySkipEvent;

    /** Another PC based skip event for const_udelay(). Similar to the udelay
     * skip, but this function precomputes the first multiply that is done
     * in the generic case since the parameter is known at compile time.
     * Thus we need to do some division to get back to us.
     */
    Linux::UDelayEvent *constUDelaySkipEvent;

};

class DumpStatsPCEvent : public PCEvent
{
  public:
    DumpStatsPCEvent(PCEventQueue *q, const std::string &desc, Addr addr)
        : PCEvent(q, desc, addr)
    {}

    virtual void process(ThreadContext* tc);
};


#endif // __ARCH_ARM_LINUX_SYSTEM_HH__