pseudo_inst.cc revision 3125:febd811bccc6 
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 * Authors: Nathan Binkert
29 */
30
31#include <errno.h>
32#include <fcntl.h>
33#include <unistd.h>
34
35#include <string>
36
37#include "sim/pseudo_inst.hh"
38#include "arch/vtophys.hh"
39#include "base/annotate.hh"
40#include "cpu/base.hh"
41#include "cpu/thread_context.hh"
42#include "cpu/quiesce_event.hh"
43#include "kern/kernel_stats.hh"
44#include "sim/param.hh"
45#include "sim/serialize.hh"
46#include "sim/sim_exit.hh"
47#include "sim/stat_control.hh"
48#include "sim/stats.hh"
49#include "sim/system.hh"
50#include "sim/debug.hh"
51#include "sim/vptr.hh"
52
53using namespace std;
54
55using namespace Stats;
56using namespace TheISA;
57
58namespace AlphaPseudo
59{
60    bool doStatisticsInsts;
61    bool doCheckpointInsts;
62    bool doQuiesce;
63
64    void
65    arm(ThreadContext *tc)
66    {
67        if (tc->getKernelStats())
68            tc->getKernelStats()->arm();
69    }
70
71    void
72    quiesce(ThreadContext *tc)
73    {
74        if (!doQuiesce)
75            return;
76
77        tc->suspend();
78        if (tc->getKernelStats())
79            tc->getKernelStats()->quiesce();
80    }
81
82    void
83    quiesceNs(ThreadContext *tc, uint64_t ns)
84    {
85        if (!doQuiesce || ns == 0)
86            return;
87
88        EndQuiesceEvent *quiesceEvent = tc->getQuiesceEvent();
89
90        if (quiesceEvent->scheduled())
91            quiesceEvent->reschedule(curTick + Clock::Int::ns * ns);
92        else
93            quiesceEvent->schedule(curTick + Clock::Int::ns * ns);
94
95        tc->suspend();
96        if (tc->getKernelStats())
97            tc->getKernelStats()->quiesce();
98    }
99
100    void
101    quiesceCycles(ThreadContext *tc, uint64_t cycles)
102    {
103        if (!doQuiesce || cycles == 0)
104            return;
105
106        EndQuiesceEvent *quiesceEvent = tc->getQuiesceEvent();
107
108        if (quiesceEvent->scheduled())
109            quiesceEvent->reschedule(curTick +
110                                     tc->getCpuPtr()->cycles(cycles));
111        else
112            quiesceEvent->schedule(curTick +
113                                   tc->getCpuPtr()->cycles(cycles));
114
115        tc->suspend();
116        if (tc->getKernelStats())
117            tc->getKernelStats()->quiesce();
118    }
119
120    uint64_t
121    quiesceTime(ThreadContext *tc)
122    {
123        return (tc->readLastActivate() - tc->readLastSuspend()) / Clock::Int::ns;
124    }
125
126    void
127    ivlb(ThreadContext *tc)
128    {
129        if (tc->getKernelStats())
130            tc->getKernelStats()->ivlb();
131    }
132
133    void
134    ivle(ThreadContext *tc)
135    {
136    }
137
138    void
139    m5exit_old(ThreadContext *tc)
140    {
141        exitSimLoop(curTick, "m5_exit_old instruction encountered");
142    }
143
144    void
145    m5exit(ThreadContext *tc, Tick delay)
146    {
147        Tick when = curTick + delay * Clock::Int::ns;
148        exitSimLoop(when, "m5_exit instruction encountered");
149    }
150
151    void
152    loadsymbol(ExecContext *xc)
153    {
154        const string &filename = xc->getCpuPtr()->system->params()->symbolfile;
155        if (filename.empty()) {
156            return;
157        }
158
159        std::string buffer;
160        ifstream file(filename.c_str());
161
162        if (!file)
163            fatal("file error: Can't open symbol table file %s\n", filename);
164
165        while (!file.eof()) {
166            getline(file, buffer);
167
168            if (buffer.empty())
169                continue;
170
171            int idx = buffer.find(' ');
172            if (idx == string::npos)
173                continue;
174
175            string address = "0x" + buffer.substr(0, idx);
176            eat_white(address);
177            if (address.empty())
178                continue;
179
180            // Skip over letter and space
181            string symbol = buffer.substr(idx + 3);
182            eat_white(symbol);
183            if (symbol.empty())
184                continue;
185
186            Addr addr;
187            if (!to_number(address, addr))
188                continue;
189
190            if (!xc->getSystemPtr()->kernelSymtab->insert(addr, symbol))
191                continue;
192
193
194            DPRINTF(Loader, "Loaded symbol: %s @ %#llx\n", symbol, addr);
195        }
196        file.close();
197    }
198
199    void
200    resetstats(ThreadContext *tc, Tick delay, Tick period)
201    {
202        if (!doStatisticsInsts)
203            return;
204
205
206        Tick when = curTick + delay * Clock::Int::ns;
207        Tick repeat = period * Clock::Int::ns;
208
209        using namespace Stats;
210        SetupEvent(Reset, when, repeat);
211    }
212
213    void
214    dumpstats(ThreadContext *tc, Tick delay, Tick period)
215    {
216        if (!doStatisticsInsts)
217            return;
218
219
220        Tick when = curTick + delay * Clock::Int::ns;
221        Tick repeat = period * Clock::Int::ns;
222
223        using namespace Stats;
224        SetupEvent(Dump, when, repeat);
225    }
226
227    void
228    addsymbol(ThreadContext *tc, Addr addr, Addr symbolAddr)
229    {
230        char symb[100];
231        CopyStringOut(tc, symb, symbolAddr, 100);
232        std::string symbol(symb);
233
234        DPRINTF(Loader, "Loaded symbol: %s @ %#llx\n", symbol, addr);
235
236        tc->getSystemPtr()->kernelSymtab->insert(addr,symbol);
237    }
238
239    void
240    anBegin(ThreadContext *tc, uint64_t cur)
241    {
242        Annotate::annotations.add(tc->getSystemPtr(), 0, cur >> 32, cur &
243                0xFFFFFFFF, 0,0);
244    }
245
246    void
247    anWait(ThreadContext *tc, uint64_t cur, uint64_t wait)
248    {
249        Annotate::annotations.add(tc->getSystemPtr(), 0, cur >> 32, cur &
250                0xFFFFFFFF, wait >> 32, wait & 0xFFFFFFFF);
251    }
252
253
254    void
255    dumpresetstats(ThreadContext *tc, Tick delay, Tick period)
256    {
257        if (!doStatisticsInsts)
258            return;
259
260
261        Tick when = curTick + delay * Clock::Int::ns;
262        Tick repeat = period * Clock::Int::ns;
263
264        using namespace Stats;
265        SetupEvent(Dump|Reset, when, repeat);
266    }
267
268    void
269    m5checkpoint(ThreadContext *tc, Tick delay, Tick period)
270    {
271        if (!doCheckpointInsts)
272            return;
273        exitSimLoop("checkpoint");
274    }
275
276    uint64_t
277    readfile(ThreadContext *tc, Addr vaddr, uint64_t len, uint64_t offset)
278    {
279        const string &file = tc->getCpuPtr()->system->params()->readfile;
280        if (file.empty()) {
281            return ULL(0);
282        }
283
284        uint64_t result = 0;
285
286        int fd = ::open(file.c_str(), O_RDONLY, 0);
287        if (fd < 0)
288            panic("could not open file %s\n", file);
289
290        if (::lseek(fd, offset, SEEK_SET) < 0)
291            panic("could not seek: %s", strerror(errno));
292
293        char *buf = new char[len];
294        char *p = buf;
295        while (len > 0) {
296            int bytes = ::read(fd, p, len);
297            if (bytes <= 0)
298                break;
299
300            p += bytes;
301            result += bytes;
302            len -= bytes;
303        }
304
305        close(fd);
306        CopyIn(tc, vaddr, buf, result);
307        delete [] buf;
308        return result;
309    }
310
311    class Context : public ParamContext
312    {
313      public:
314        Context(const string &section) : ParamContext(section) {}
315        void checkParams();
316    };
317
318    Context context("pseudo_inst");
319
320    Param<bool> __quiesce(&context, "quiesce",
321                          "enable quiesce instructions",
322                          true);
323    Param<bool> __statistics(&context, "statistics",
324                             "enable statistics pseudo instructions",
325                             true);
326    Param<bool> __checkpoint(&context, "checkpoint",
327                             "enable checkpoint pseudo instructions",
328                             true);
329
330    void
331    Context::checkParams()
332    {
333        doQuiesce = __quiesce;
334        doStatisticsInsts = __statistics;
335        doCheckpointInsts = __checkpoint;
336    }
337
338    void debugbreak(ThreadContext *tc)
339    {
340        debug_break();
341    }
342
343    void switchcpu(ThreadContext *tc)
344    {
345        exitSimLoop("switchcpu");
346    }
347}
348