pseudo_inst.cc revision 5100:7a0180040755 
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 <fstream>
36#include <string>
37
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 "arch/kernel_stats.hh"
44#include "sim/pseudo_inst.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 PseudoInst
59{
60    void
61    arm(ThreadContext *tc)
62    {
63        if (tc->getKernelStats())
64            tc->getKernelStats()->arm();
65    }
66
67    void
68    quiesce(ThreadContext *tc)
69    {
70        if (!tc->getCpuPtr()->params->do_quiesce)
71            return;
72
73        DPRINTF(Quiesce, "%s: quiesce()\n", tc->getCpuPtr()->name());
74
75        tc->suspend();
76        if (tc->getKernelStats())
77            tc->getKernelStats()->quiesce();
78    }
79
80    void
81    quiesceNs(ThreadContext *tc, uint64_t ns)
82    {
83        if (!tc->getCpuPtr()->params->do_quiesce || ns == 0)
84            return;
85
86        EndQuiesceEvent *quiesceEvent = tc->getQuiesceEvent();
87
88        Tick resume = curTick + Clock::Int::ns * ns;
89
90        quiesceEvent->reschedule(resume, true);
91
92        DPRINTF(Quiesce, "%s: quiesceNs(%d) until %d\n",
93                tc->getCpuPtr()->name(), ns, resume);
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 (!tc->getCpuPtr()->params->do_quiesce || cycles == 0)
104            return;
105
106        EndQuiesceEvent *quiesceEvent = tc->getQuiesceEvent();
107
108        Tick resume = curTick + tc->getCpuPtr()->ticks(cycles);
109
110        quiesceEvent->reschedule(resume, true);
111
112        DPRINTF(Quiesce, "%s: quiesceCycles(%d) until %d\n",
113                tc->getCpuPtr()->name(), cycles, resume);
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    m5exit_old(ThreadContext *tc)
128    {
129        exitSimLoop("m5_exit_old instruction encountered");
130    }
131
132    void
133    m5exit(ThreadContext *tc, Tick delay)
134    {
135        Tick when = curTick + delay * Clock::Int::ns;
136        schedExitSimLoop("m5_exit instruction encountered", when);
137    }
138
139    void
140    loadsymbol(ThreadContext *tc)
141    {
142        const string &filename = tc->getCpuPtr()->system->params()->symbolfile;
143        if (filename.empty()) {
144            return;
145        }
146
147        std::string buffer;
148        ifstream file(filename.c_str());
149
150        if (!file)
151            fatal("file error: Can't open symbol table file %s\n", filename);
152
153        while (!file.eof()) {
154            getline(file, buffer);
155
156            if (buffer.empty())
157                continue;
158
159            int idx = buffer.find(' ');
160            if (idx == string::npos)
161                continue;
162
163            string address = "0x" + buffer.substr(0, idx);
164            eat_white(address);
165            if (address.empty())
166                continue;
167
168            // Skip over letter and space
169            string symbol = buffer.substr(idx + 3);
170            eat_white(symbol);
171            if (symbol.empty())
172                continue;
173
174            Addr addr;
175            if (!to_number(address, addr))
176                continue;
177
178            if (!tc->getSystemPtr()->kernelSymtab->insert(addr, symbol))
179                continue;
180
181
182            DPRINTF(Loader, "Loaded symbol: %s @ %#llx\n", symbol, addr);
183        }
184        file.close();
185    }
186
187    void
188    resetstats(ThreadContext *tc, Tick delay, Tick period)
189    {
190        if (!tc->getCpuPtr()->params->do_statistics_insts)
191            return;
192
193
194        Tick when = curTick + delay * Clock::Int::ns;
195        Tick repeat = period * Clock::Int::ns;
196
197        Stats::StatEvent(false, true, when, repeat);
198    }
199
200    void
201    dumpstats(ThreadContext *tc, Tick delay, Tick period)
202    {
203        if (!tc->getCpuPtr()->params->do_statistics_insts)
204            return;
205
206
207        Tick when = curTick + delay * Clock::Int::ns;
208        Tick repeat = period * Clock::Int::ns;
209
210        Stats::StatEvent(true, false, when, repeat);
211    }
212
213    void
214    addsymbol(ThreadContext *tc, Addr addr, Addr symbolAddr)
215    {
216        char symb[100];
217        CopyStringOut(tc, symb, symbolAddr, 100);
218        std::string symbol(symb);
219
220        DPRINTF(Loader, "Loaded symbol: %s @ %#llx\n", symbol, addr);
221
222        tc->getSystemPtr()->kernelSymtab->insert(addr,symbol);
223    }
224
225    void
226    anBegin(ThreadContext *tc, uint64_t cur)
227    {
228        Annotate::annotations.add(tc->getSystemPtr(), 0, cur >> 32, cur &
229                0xFFFFFFFF, 0,0);
230    }
231
232    void
233    anWait(ThreadContext *tc, uint64_t cur, uint64_t wait)
234    {
235        Annotate::annotations.add(tc->getSystemPtr(), 0, cur >> 32, cur &
236                0xFFFFFFFF, wait >> 32, wait & 0xFFFFFFFF);
237    }
238
239
240    void
241    dumpresetstats(ThreadContext *tc, Tick delay, Tick period)
242    {
243        if (!tc->getCpuPtr()->params->do_statistics_insts)
244            return;
245
246
247        Tick when = curTick + delay * Clock::Int::ns;
248        Tick repeat = period * Clock::Int::ns;
249
250        Stats::StatEvent(true, true, when, repeat);
251    }
252
253    void
254    m5checkpoint(ThreadContext *tc, Tick delay, Tick period)
255    {
256        if (!tc->getCpuPtr()->params->do_checkpoint_insts)
257            return;
258
259        Tick when = curTick + delay * Clock::Int::ns;
260        Tick repeat = period * Clock::Int::ns;
261
262        schedExitSimLoop("checkpoint", when, repeat);
263    }
264
265    uint64_t
266    readfile(ThreadContext *tc, Addr vaddr, uint64_t len, uint64_t offset)
267    {
268        const string &file = tc->getSystemPtr()->params()->readfile;
269        if (file.empty()) {
270            return ULL(0);
271        }
272
273        uint64_t result = 0;
274
275        int fd = ::open(file.c_str(), O_RDONLY, 0);
276        if (fd < 0)
277            panic("could not open file %s\n", file);
278
279        if (::lseek(fd, offset, SEEK_SET) < 0)
280            panic("could not seek: %s", strerror(errno));
281
282        char *buf = new char[len];
283        char *p = buf;
284        while (len > 0) {
285            int bytes = ::read(fd, p, len);
286            if (bytes <= 0)
287                break;
288
289            p += bytes;
290            result += bytes;
291            len -= bytes;
292        }
293
294        close(fd);
295        CopyIn(tc, vaddr, buf, result);
296        delete [] buf;
297        return result;
298    }
299
300    void debugbreak(ThreadContext *tc)
301    {
302        debug_break();
303    }
304
305    void switchcpu(ThreadContext *tc)
306    {
307        exitSimLoop("switchcpu");
308    }
309}
310