pseudo_inst.cc revision 5882 
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 "base/debug.hh"
42#include "cpu/base.hh"
43#include "cpu/thread_context.hh"
44#include "cpu/quiesce_event.hh"
45#include "params/BaseCPU.hh"
46#include "sim/pseudo_inst.hh"
47#include "sim/serialize.hh"
48#include "sim/sim_events.hh"
49#include "sim/sim_exit.hh"
50#include "sim/stat_control.hh"
51#include "sim/stats.hh"
52#include "sim/system.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
141wakeCPU(ThreadContext *tc, uint64_t cpuid)
142{
143    System *sys = tc->getSystemPtr();
144    ThreadContext *other_tc = sys->threadContexts[cpuid];
145    if (other_tc->status() == ThreadContext::Suspended)
146        other_tc->activate();
147}
148
149void
150m5exit(ThreadContext *tc, Tick delay)
151{
152    Tick when = curTick + delay * Clock::Int::ns;
153    Event *event = new SimLoopExitEvent("m5_exit instruction encountered", 0);
154    mainEventQueue.schedule(event, when);
155}
156
157#if FULL_SYSTEM
158
159void
160loadsymbol(ThreadContext *tc)
161{
162    const string &filename = tc->getCpuPtr()->system->params()->symbolfile;
163    if (filename.empty()) {
164        return;
165    }
166
167    std::string buffer;
168    ifstream file(filename.c_str());
169
170    if (!file)
171        fatal("file error: Can't open symbol table file %s\n", filename);
172
173    while (!file.eof()) {
174        getline(file, buffer);
175
176        if (buffer.empty())
177            continue;
178
179        int idx = buffer.find(' ');
180        if (idx == string::npos)
181            continue;
182
183        string address = "0x" + buffer.substr(0, idx);
184        eat_white(address);
185        if (address.empty())
186            continue;
187
188        // Skip over letter and space
189        string symbol = buffer.substr(idx + 3);
190        eat_white(symbol);
191        if (symbol.empty())
192            continue;
193
194        Addr addr;
195        if (!to_number(address, addr))
196            continue;
197
198        if (!tc->getSystemPtr()->kernelSymtab->insert(addr, symbol))
199            continue;
200
201
202        DPRINTF(Loader, "Loaded symbol: %s @ %#llx\n", symbol, addr);
203    }
204    file.close();
205}
206
207void
208addsymbol(ThreadContext *tc, Addr addr, Addr symbolAddr)
209{
210    char symb[100];
211    CopyStringOut(tc, symb, symbolAddr, 100);
212    std::string symbol(symb);
213
214    DPRINTF(Loader, "Loaded symbol: %s @ %#llx\n", symbol, addr);
215
216    tc->getSystemPtr()->kernelSymtab->insert(addr,symbol);
217}
218
219#endif
220
221
222void
223resetstats(ThreadContext *tc, Tick delay, Tick period)
224{
225    if (!tc->getCpuPtr()->params()->do_statistics_insts)
226        return;
227
228
229    Tick when = curTick + delay * Clock::Int::ns;
230    Tick repeat = period * Clock::Int::ns;
231
232    Stats::StatEvent(false, true, when, repeat);
233}
234
235void
236dumpstats(ThreadContext *tc, Tick delay, Tick period)
237{
238    if (!tc->getCpuPtr()->params()->do_statistics_insts)
239        return;
240
241
242    Tick when = curTick + delay * Clock::Int::ns;
243    Tick repeat = period * Clock::Int::ns;
244
245    Stats::StatEvent(true, false, when, repeat);
246}
247
248void
249dumpresetstats(ThreadContext *tc, Tick delay, Tick period)
250{
251    if (!tc->getCpuPtr()->params()->do_statistics_insts)
252        return;
253
254
255    Tick when = curTick + delay * Clock::Int::ns;
256    Tick repeat = period * Clock::Int::ns;
257
258    Stats::StatEvent(true, true, when, repeat);
259}
260
261void
262m5checkpoint(ThreadContext *tc, Tick delay, Tick period)
263{
264    if (!tc->getCpuPtr()->params()->do_checkpoint_insts)
265        return;
266
267    Tick when = curTick + delay * Clock::Int::ns;
268    Tick repeat = period * Clock::Int::ns;
269
270    Event *event = new SimLoopExitEvent("checkpoint", 0, repeat);
271    mainEventQueue.schedule(event, when);
272}
273
274#if FULL_SYSTEM
275
276uint64_t
277readfile(ThreadContext *tc, Addr vaddr, uint64_t len, uint64_t offset)
278{
279    const string &file = tc->getSystemPtr()->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#endif
312
313void
314debugbreak(ThreadContext *tc)
315{
316    debug_break();
317}
318
319void
320switchcpu(ThreadContext *tc)
321{
322    exitSimLoop("switchcpu");
323}
324
325/* namespace PseudoInst */ }
326