pseudo_inst.cc revision 5780 
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/kernel_stats.hh"
39#include "arch/vtophys.hh"
40#include "base/annotate.hh"
41#include "cpu/base.hh"
42#include "cpu/thread_context.hh"
43#include "cpu/quiesce_event.hh"
44#include "params/BaseCPU.hh"
45#include "sim/pseudo_inst.hh"
46#include "sim/serialize.hh"
47#include "sim/sim_events.hh"
48#include "sim/sim_exit.hh"
49#include "sim/stat_control.hh"
50#include "sim/stats.hh"
51#include "sim/system.hh"
52#include "sim/debug.hh"
53#if FULL_SYSTEM
54#include "sim/vptr.hh"
55#endif
56
57using namespace std;
58
59using namespace Stats;
60using namespace TheISA;
61
62namespace PseudoInst {
63
64#if FULL_SYSTEM
65
66void
67arm(ThreadContext *tc)
68{
69    if (tc->getKernelStats())
70        tc->getKernelStats()->arm();
71}
72
73void
74quiesce(ThreadContext *tc)
75{
76    if (!tc->getCpuPtr()->params()->do_quiesce)
77        return;
78
79    DPRINTF(Quiesce, "%s: quiesce()\n", tc->getCpuPtr()->name());
80
81    tc->suspend();
82    if (tc->getKernelStats())
83        tc->getKernelStats()->quiesce();
84}
85
86void
87quiesceNs(ThreadContext *tc, uint64_t ns)
88{
89    if (!tc->getCpuPtr()->params()->do_quiesce || ns == 0)
90        return;
91
92    EndQuiesceEvent *quiesceEvent = tc->getQuiesceEvent();
93
94    Tick resume = curTick + Clock::Int::ns * ns;
95
96    mainEventQueue.reschedule(quiesceEvent, resume, true);
97
98    DPRINTF(Quiesce, "%s: quiesceNs(%d) until %d\n",
99            tc->getCpuPtr()->name(), ns, resume);
100
101    tc->suspend();
102    if (tc->getKernelStats())
103        tc->getKernelStats()->quiesce();
104}
105
106void
107quiesceCycles(ThreadContext *tc, uint64_t cycles)
108{
109    if (!tc->getCpuPtr()->params()->do_quiesce || cycles == 0)
110        return;
111
112    EndQuiesceEvent *quiesceEvent = tc->getQuiesceEvent();
113
114    Tick resume = curTick + tc->getCpuPtr()->ticks(cycles);
115
116    mainEventQueue.reschedule(quiesceEvent, resume, true);
117
118    DPRINTF(Quiesce, "%s: quiesceCycles(%d) until %d\n",
119            tc->getCpuPtr()->name(), cycles, resume);
120
121    tc->suspend();
122    if (tc->getKernelStats())
123        tc->getKernelStats()->quiesce();
124}
125
126uint64_t
127quiesceTime(ThreadContext *tc)
128{
129    return (tc->readLastActivate() - tc->readLastSuspend()) / Clock::Int::ns;
130}
131
132#endif
133
134uint64_t
135rpns(ThreadContext *tc)
136{
137    return curTick / Clock::Int::ns;
138}
139
140void
141m5exit(ThreadContext *tc, Tick delay)
142{
143    Tick when = curTick + delay * Clock::Int::ns;
144    Event *event = new SimLoopExitEvent("m5_exit instruction encountered", 0);
145    mainEventQueue.schedule(event, when);
146}
147
148#if FULL_SYSTEM
149
150void
151loadsymbol(ThreadContext *tc)
152{
153    const string &filename = tc->getCpuPtr()->system->params()->symbolfile;
154    if (filename.empty()) {
155        return;
156    }
157
158    std::string buffer;
159    ifstream file(filename.c_str());
160
161    if (!file)
162        fatal("file error: Can't open symbol table file %s\n", filename);
163
164    while (!file.eof()) {
165        getline(file, buffer);
166
167        if (buffer.empty())
168            continue;
169
170        int idx = buffer.find(' ');
171        if (idx == string::npos)
172            continue;
173
174        string address = "0x" + buffer.substr(0, idx);
175        eat_white(address);
176        if (address.empty())
177            continue;
178
179        // Skip over letter and space
180        string symbol = buffer.substr(idx + 3);
181        eat_white(symbol);
182        if (symbol.empty())
183            continue;
184
185        Addr addr;
186        if (!to_number(address, addr))
187            continue;
188
189        if (!tc->getSystemPtr()->kernelSymtab->insert(addr, symbol))
190            continue;
191
192
193        DPRINTF(Loader, "Loaded symbol: %s @ %#llx\n", symbol, addr);
194    }
195    file.close();
196}
197
198void
199addsymbol(ThreadContext *tc, Addr addr, Addr symbolAddr)
200{
201    char symb[100];
202    CopyStringOut(tc, symb, symbolAddr, 100);
203    std::string symbol(symb);
204
205    DPRINTF(Loader, "Loaded symbol: %s @ %#llx\n", symbol, addr);
206
207    tc->getSystemPtr()->kernelSymtab->insert(addr,symbol);
208}
209
210#endif
211
212
213void
214resetstats(ThreadContext *tc, Tick delay, Tick period)
215{
216    if (!tc->getCpuPtr()->params()->do_statistics_insts)
217        return;
218
219
220    Tick when = curTick + delay * Clock::Int::ns;
221    Tick repeat = period * Clock::Int::ns;
222
223    Stats::StatEvent(false, true, when, repeat);
224}
225
226void
227dumpstats(ThreadContext *tc, Tick delay, Tick period)
228{
229    if (!tc->getCpuPtr()->params()->do_statistics_insts)
230        return;
231
232
233    Tick when = curTick + delay * Clock::Int::ns;
234    Tick repeat = period * Clock::Int::ns;
235
236    Stats::StatEvent(true, false, when, repeat);
237}
238
239void
240dumpresetstats(ThreadContext *tc, Tick delay, Tick period)
241{
242    if (!tc->getCpuPtr()->params()->do_statistics_insts)
243        return;
244
245
246    Tick when = curTick + delay * Clock::Int::ns;
247    Tick repeat = period * Clock::Int::ns;
248
249    Stats::StatEvent(true, true, when, repeat);
250}
251
252void
253m5checkpoint(ThreadContext *tc, Tick delay, Tick period)
254{
255    if (!tc->getCpuPtr()->params()->do_checkpoint_insts)
256        return;
257
258    Tick when = curTick + delay * Clock::Int::ns;
259    Tick repeat = period * Clock::Int::ns;
260
261    Event *event = new SimLoopExitEvent("checkpoint", 0, repeat);
262    mainEventQueue.schedule(event, when);
263}
264
265#if FULL_SYSTEM
266
267uint64_t
268readfile(ThreadContext *tc, Addr vaddr, uint64_t len, uint64_t offset)
269{
270    const string &file = tc->getSystemPtr()->params()->readfile;
271    if (file.empty()) {
272        return ULL(0);
273    }
274
275    uint64_t result = 0;
276
277    int fd = ::open(file.c_str(), O_RDONLY, 0);
278    if (fd < 0)
279        panic("could not open file %s\n", file);
280
281    if (::lseek(fd, offset, SEEK_SET) < 0)
282        panic("could not seek: %s", strerror(errno));
283
284    char *buf = new char[len];
285    char *p = buf;
286    while (len > 0) {
287        int bytes = ::read(fd, p, len);
288        if (bytes <= 0)
289            break;
290
291        p += bytes;
292        result += bytes;
293        len -= bytes;
294    }
295
296    close(fd);
297    CopyIn(tc, vaddr, buf, result);
298    delete [] buf;
299    return result;
300}
301
302#endif
303
304void
305debugbreak(ThreadContext *tc)
306{
307    debug_break();
308}
309
310void
311switchcpu(ThreadContext *tc)
312{
313    exitSimLoop("switchcpu");
314}
315
316/* namespace PseudoInst */ }
317