pseudo_inst.cc revision 2632:1bb2f91485ea 
1/*
2 * Copyright (c) 2003-2006 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#include <errno.h>
30#include <fcntl.h>
31#include <unistd.h>
32
33#include <string>
34
35#include "sim/pseudo_inst.hh"
36#include "arch/vtophys.hh"
37#include "cpu/base.hh"
38#include "cpu/sampler/sampler.hh"
39#include "cpu/exec_context.hh"
40#include "kern/kernel_stats.hh"
41#include "sim/param.hh"
42#include "sim/serialize.hh"
43#include "sim/sim_exit.hh"
44#include "sim/stat_control.hh"
45#include "sim/stats.hh"
46#include "sim/system.hh"
47#include "sim/debug.hh"
48#include "sim/vptr.hh"
49
50using namespace std;
51
52extern Sampler *SampCPU;
53
54using namespace Stats;
55using namespace TheISA;
56
57namespace AlphaPseudo
58{
59    bool doStatisticsInsts;
60    bool doCheckpointInsts;
61    bool doQuiesce;
62
63    void
64    arm(ExecContext *xc)
65    {
66        xc->getCpuPtr()->kernelStats->arm();
67    }
68
69    void
70    quiesce(ExecContext *xc)
71    {
72        if (!doQuiesce)
73            return;
74
75        xc->suspend();
76        xc->getCpuPtr()->kernelStats->quiesce();
77    }
78
79    void
80    quiesceNs(ExecContext *xc, uint64_t ns)
81    {
82        if (!doQuiesce || ns == 0)
83            return;
84
85        Event *quiesceEvent = xc->getQuiesceEvent();
86
87        if (quiesceEvent->scheduled())
88            quiesceEvent->reschedule(curTick + Clock::Int::ns * ns);
89        else
90            quiesceEvent->schedule(curTick + Clock::Int::ns * ns);
91
92        xc->suspend();
93        xc->getCpuPtr()->kernelStats->quiesce();
94    }
95
96    void
97    quiesceCycles(ExecContext *xc, uint64_t cycles)
98    {
99        if (!doQuiesce || cycles == 0)
100            return;
101
102        Event *quiesceEvent = xc->getQuiesceEvent();
103
104        if (quiesceEvent->scheduled())
105            quiesceEvent->reschedule(curTick +
106                                     xc->getCpuPtr()->cycles(cycles));
107        else
108            quiesceEvent->schedule(curTick +
109                                   xc->getCpuPtr()->cycles(cycles));
110
111        xc->suspend();
112        xc->getCpuPtr()->kernelStats->quiesce();
113    }
114
115    uint64_t
116    quiesceTime(ExecContext *xc)
117    {
118        return (xc->readLastActivate() - xc->readLastSuspend()) / Clock::Int::ns;
119    }
120
121    void
122    ivlb(ExecContext *xc)
123    {
124        xc->getCpuPtr()->kernelStats->ivlb();
125    }
126
127    void
128    ivle(ExecContext *xc)
129    {
130    }
131
132    void
133    m5exit_old(ExecContext *xc)
134    {
135        SimExit(curTick, "m5_exit_old instruction encountered");
136    }
137
138    void
139    m5exit(ExecContext *xc, Tick delay)
140    {
141        Tick when = curTick + delay * Clock::Int::ns;
142        SimExit(when, "m5_exit instruction encountered");
143    }
144
145    void
146    resetstats(ExecContext *xc, Tick delay, Tick period)
147    {
148        if (!doStatisticsInsts)
149            return;
150
151
152        Tick when = curTick + delay * Clock::Int::ns;
153        Tick repeat = period * Clock::Int::ns;
154
155        using namespace Stats;
156        SetupEvent(Reset, when, repeat);
157    }
158
159    void
160    dumpstats(ExecContext *xc, Tick delay, Tick period)
161    {
162        if (!doStatisticsInsts)
163            return;
164
165
166        Tick when = curTick + delay * Clock::Int::ns;
167        Tick repeat = period * Clock::Int::ns;
168
169        using namespace Stats;
170        SetupEvent(Dump, when, repeat);
171    }
172
173    void
174    addsymbol(ExecContext *xc, Addr addr, Addr symbolAddr)
175    {
176        char symb[100];
177        CopyStringOut(xc, symb, symbolAddr, 100);
178        std::string symbol(symb);
179
180        DPRINTF(Loader, "Loaded symbol: %s @ %#llx\n", symbol, addr);
181
182        xc->getSystemPtr()->kernelSymtab->insert(addr,symbol);
183    }
184
185    void
186    dumpresetstats(ExecContext *xc, Tick delay, Tick period)
187    {
188        if (!doStatisticsInsts)
189            return;
190
191
192        Tick when = curTick + delay * Clock::Int::ns;
193        Tick repeat = period * Clock::Int::ns;
194
195        using namespace Stats;
196        SetupEvent(Dump|Reset, when, repeat);
197    }
198
199    void
200    m5checkpoint(ExecContext *xc, Tick delay, Tick period)
201    {
202        if (!doCheckpointInsts)
203            return;
204
205
206        Tick when = curTick + delay * Clock::Int::ns;
207        Tick repeat = period * Clock::Int::ns;
208
209        Checkpoint::setup(when, repeat);
210    }
211
212    uint64_t
213    readfile(ExecContext *xc, Addr vaddr, uint64_t len, uint64_t offset)
214    {
215        const string &file = xc->getCpuPtr()->system->params()->readfile;
216        if (file.empty()) {
217            return ULL(0);
218        }
219
220        uint64_t result = 0;
221
222        int fd = ::open(file.c_str(), O_RDONLY, 0);
223        if (fd < 0)
224            panic("could not open file %s\n", file);
225
226        if (::lseek(fd, offset, SEEK_SET) < 0)
227            panic("could not seek: %s", strerror(errno));
228
229        char *buf = new char[len];
230        char *p = buf;
231        while (len > 0) {
232            int bytes = ::read(fd, p, len);
233            if (bytes <= 0)
234                break;
235
236            p += bytes;
237            result += bytes;
238            len -= bytes;
239        }
240
241        close(fd);
242        CopyIn(xc, vaddr, buf, result);
243        delete [] buf;
244        return result;
245    }
246
247    class Context : public ParamContext
248    {
249      public:
250        Context(const string &section) : ParamContext(section) {}
251        void checkParams();
252    };
253
254    Context context("pseudo_inst");
255
256    Param<bool> __quiesce(&context, "quiesce",
257                          "enable quiesce instructions",
258                          true);
259    Param<bool> __statistics(&context, "statistics",
260                             "enable statistics pseudo instructions",
261                             true);
262    Param<bool> __checkpoint(&context, "checkpoint",
263                             "enable checkpoint pseudo instructions",
264                             true);
265
266    void
267    Context::checkParams()
268    {
269        doQuiesce = __quiesce;
270        doStatisticsInsts = __statistics;
271        doCheckpointInsts = __checkpoint;
272    }
273
274    void debugbreak(ExecContext *xc)
275    {
276        debug_break();
277    }
278
279    void switchcpu(ExecContext *xc)
280    {
281        if (SampCPU)
282            SampCPU->switchCPUs();
283    }
284}
285