pseudo_inst.cc revision 6227 
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 "config/full_system.hh"
39
40#include "arch/vtophys.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
54#if FULL_SYSTEM
55#include "arch/kernel_stats.hh"
56#include "sim/vptr.hh"
57#endif
58
59using namespace std;
60
61using namespace Stats;
62using namespace TheISA;
63
64namespace PseudoInst {
65
66#if FULL_SYSTEM
67
68void
69arm(ThreadContext *tc)
70{
71    if (tc->getKernelStats())
72        tc->getKernelStats()->arm();
73}
74
75void
76quiesce(ThreadContext *tc)
77{
78    if (!tc->getCpuPtr()->params()->do_quiesce)
79        return;
80
81    DPRINTF(Quiesce, "%s: quiesce()\n", tc->getCpuPtr()->name());
82
83    tc->suspend();
84    if (tc->getKernelStats())
85        tc->getKernelStats()->quiesce();
86}
87
88void
89quiesceNs(ThreadContext *tc, uint64_t ns)
90{
91    if (!tc->getCpuPtr()->params()->do_quiesce || ns == 0)
92        return;
93
94    EndQuiesceEvent *quiesceEvent = tc->getQuiesceEvent();
95
96    Tick resume = curTick + Clock::Int::ns * ns;
97
98    mainEventQueue.reschedule(quiesceEvent, resume, true);
99
100    DPRINTF(Quiesce, "%s: quiesceNs(%d) until %d\n",
101            tc->getCpuPtr()->name(), ns, resume);
102
103    tc->suspend();
104    if (tc->getKernelStats())
105        tc->getKernelStats()->quiesce();
106}
107
108void
109quiesceCycles(ThreadContext *tc, uint64_t cycles)
110{
111    if (!tc->getCpuPtr()->params()->do_quiesce || cycles == 0)
112        return;
113
114    EndQuiesceEvent *quiesceEvent = tc->getQuiesceEvent();
115
116    Tick resume = curTick + tc->getCpuPtr()->ticks(cycles);
117
118    mainEventQueue.reschedule(quiesceEvent, resume, true);
119
120    DPRINTF(Quiesce, "%s: quiesceCycles(%d) until %d\n",
121            tc->getCpuPtr()->name(), cycles, resume);
122
123    tc->suspend();
124    if (tc->getKernelStats())
125        tc->getKernelStats()->quiesce();
126}
127
128uint64_t
129quiesceTime(ThreadContext *tc)
130{
131    return (tc->readLastActivate() - tc->readLastSuspend()) / Clock::Int::ns;
132}
133
134#endif
135
136uint64_t
137rpns(ThreadContext *tc)
138{
139    return curTick / Clock::Int::ns;
140}
141
142void
143wakeCPU(ThreadContext *tc, uint64_t cpuid)
144{
145    System *sys = tc->getSystemPtr();
146    ThreadContext *other_tc = sys->threadContexts[cpuid];
147    if (other_tc->status() == ThreadContext::Suspended)
148        other_tc->activate();
149}
150
151void
152m5exit(ThreadContext *tc, Tick delay)
153{
154    Tick when = curTick + delay * Clock::Int::ns;
155    Event *event = new SimLoopExitEvent("m5_exit instruction encountered", 0);
156    mainEventQueue.schedule(event, when);
157}
158
159#if FULL_SYSTEM
160
161void
162loadsymbol(ThreadContext *tc)
163{
164    const string &filename = tc->getCpuPtr()->system->params()->symbolfile;
165    if (filename.empty()) {
166        return;
167    }
168
169    std::string buffer;
170    ifstream file(filename.c_str());
171
172    if (!file)
173        fatal("file error: Can't open symbol table file %s\n", filename);
174
175    while (!file.eof()) {
176        getline(file, buffer);
177
178        if (buffer.empty())
179            continue;
180
181        string::size_type idx = buffer.find(' ');
182        if (idx == string::npos)
183            continue;
184
185        string address = "0x" + buffer.substr(0, idx);
186        eat_white(address);
187        if (address.empty())
188            continue;
189
190        // Skip over letter and space
191        string symbol = buffer.substr(idx + 3);
192        eat_white(symbol);
193        if (symbol.empty())
194            continue;
195
196        Addr addr;
197        if (!to_number(address, addr))
198            continue;
199
200        if (!tc->getSystemPtr()->kernelSymtab->insert(addr, symbol))
201            continue;
202
203
204        DPRINTF(Loader, "Loaded symbol: %s @ %#llx\n", symbol, addr);
205    }
206    file.close();
207}
208
209void
210addsymbol(ThreadContext *tc, Addr addr, Addr symbolAddr)
211{
212    char symb[100];
213    CopyStringOut(tc, symb, symbolAddr, 100);
214    std::string symbol(symb);
215
216    DPRINTF(Loader, "Loaded symbol: %s @ %#llx\n", symbol, addr);
217
218    tc->getSystemPtr()->kernelSymtab->insert(addr,symbol);
219    debugSymbolTable->insert(addr,symbol);
220}
221
222#endif
223
224
225void
226resetstats(ThreadContext *tc, Tick delay, Tick period)
227{
228    if (!tc->getCpuPtr()->params()->do_statistics_insts)
229        return;
230
231
232    Tick when = curTick + delay * Clock::Int::ns;
233    Tick repeat = period * Clock::Int::ns;
234
235    Stats::StatEvent(false, true, when, repeat);
236}
237
238void
239dumpstats(ThreadContext *tc, Tick delay, Tick period)
240{
241    if (!tc->getCpuPtr()->params()->do_statistics_insts)
242        return;
243
244
245    Tick when = curTick + delay * Clock::Int::ns;
246    Tick repeat = period * Clock::Int::ns;
247
248    Stats::StatEvent(true, false, when, repeat);
249}
250
251void
252dumpresetstats(ThreadContext *tc, Tick delay, Tick period)
253{
254    if (!tc->getCpuPtr()->params()->do_statistics_insts)
255        return;
256
257
258    Tick when = curTick + delay * Clock::Int::ns;
259    Tick repeat = period * Clock::Int::ns;
260
261    Stats::StatEvent(true, true, when, repeat);
262}
263
264void
265m5checkpoint(ThreadContext *tc, Tick delay, Tick period)
266{
267    if (!tc->getCpuPtr()->params()->do_checkpoint_insts)
268        return;
269
270    Tick when = curTick + delay * Clock::Int::ns;
271    Tick repeat = period * Clock::Int::ns;
272
273    Event *event = new SimLoopExitEvent("checkpoint", 0, repeat);
274    mainEventQueue.schedule(event, when);
275}
276
277#if FULL_SYSTEM
278
279uint64_t
280readfile(ThreadContext *tc, Addr vaddr, uint64_t len, uint64_t offset)
281{
282    const string &file = tc->getSystemPtr()->params()->readfile;
283    if (file.empty()) {
284        return ULL(0);
285    }
286
287    uint64_t result = 0;
288
289    int fd = ::open(file.c_str(), O_RDONLY, 0);
290    if (fd < 0)
291        panic("could not open file %s\n", file);
292
293    if (::lseek(fd, offset, SEEK_SET) < 0)
294        panic("could not seek: %s", strerror(errno));
295
296    char *buf = new char[len];
297    char *p = buf;
298    while (len > 0) {
299        int bytes = ::read(fd, p, len);
300        if (bytes <= 0)
301            break;
302
303        p += bytes;
304        result += bytes;
305        len -= bytes;
306    }
307
308    close(fd);
309    CopyIn(tc, vaddr, buf, result);
310    delete [] buf;
311    return result;
312}
313
314#endif
315
316void
317debugbreak(ThreadContext *tc)
318{
319    debug_break();
320}
321
322void
323switchcpu(ThreadContext *tc)
324{
325    exitSimLoop("switchcpu");
326}
327
328/* namespace PseudoInst */ }
329