pseudo_inst.cc revision 7811 
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/debug.hh"
40#include "config/full_system.hh"
41#include "config/the_isa.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 + SimClock::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()) /
132        SimClock::Int::ns;
133}
134
135#endif
136
137uint64_t
138rpns(ThreadContext *tc)
139{
140    return curTick / SimClock::Int::ns;
141}
142
143void
144wakeCPU(ThreadContext *tc, uint64_t cpuid)
145{
146    System *sys = tc->getSystemPtr();
147    ThreadContext *other_tc = sys->threadContexts[cpuid];
148    if (other_tc->status() == ThreadContext::Suspended)
149        other_tc->activate();
150}
151
152void
153m5exit(ThreadContext *tc, Tick delay)
154{
155    Tick when = curTick + delay * SimClock::Int::ns;
156    Event *event = new SimLoopExitEvent("m5_exit instruction encountered", 0);
157    mainEventQueue.schedule(event, when);
158}
159
160#if FULL_SYSTEM
161
162void
163loadsymbol(ThreadContext *tc)
164{
165    const string &filename = tc->getCpuPtr()->system->params()->symbolfile;
166    if (filename.empty()) {
167        return;
168    }
169
170    std::string buffer;
171    ifstream file(filename.c_str());
172
173    if (!file)
174        fatal("file error: Can't open symbol table file %s\n", filename);
175
176    while (!file.eof()) {
177        getline(file, buffer);
178
179        if (buffer.empty())
180            continue;
181
182        string::size_type idx = buffer.find(' ');
183        if (idx == string::npos)
184            continue;
185
186        string address = "0x" + buffer.substr(0, idx);
187        eat_white(address);
188        if (address.empty())
189            continue;
190
191        // Skip over letter and space
192        string symbol = buffer.substr(idx + 3);
193        eat_white(symbol);
194        if (symbol.empty())
195            continue;
196
197        Addr addr;
198        if (!to_number(address, addr))
199            continue;
200
201        if (!tc->getSystemPtr()->kernelSymtab->insert(addr, symbol))
202            continue;
203
204
205        DPRINTF(Loader, "Loaded symbol: %s @ %#llx\n", symbol, addr);
206    }
207    file.close();
208}
209
210void
211addsymbol(ThreadContext *tc, Addr addr, Addr symbolAddr)
212{
213    char symb[100];
214    CopyStringOut(tc, symb, symbolAddr, 100);
215    std::string symbol(symb);
216
217    DPRINTF(Loader, "Loaded symbol: %s @ %#llx\n", symbol, addr);
218
219    tc->getSystemPtr()->kernelSymtab->insert(addr,symbol);
220    debugSymbolTable->insert(addr,symbol);
221}
222
223#endif
224
225
226void
227resetstats(ThreadContext *tc, Tick delay, Tick period)
228{
229    if (!tc->getCpuPtr()->params()->do_statistics_insts)
230        return;
231
232
233    Tick when = curTick + delay * SimClock::Int::ns;
234    Tick repeat = period * SimClock::Int::ns;
235
236    Stats::StatEvent(false, true, when, repeat);
237}
238
239void
240dumpstats(ThreadContext *tc, Tick delay, Tick period)
241{
242    if (!tc->getCpuPtr()->params()->do_statistics_insts)
243        return;
244
245
246    Tick when = curTick + delay * SimClock::Int::ns;
247    Tick repeat = period * SimClock::Int::ns;
248
249    Stats::StatEvent(true, false, when, repeat);
250}
251
252void
253dumpresetstats(ThreadContext *tc, Tick delay, Tick period)
254{
255    if (!tc->getCpuPtr()->params()->do_statistics_insts)
256        return;
257
258
259    Tick when = curTick + delay * SimClock::Int::ns;
260    Tick repeat = period * SimClock::Int::ns;
261
262    Stats::StatEvent(true, true, when, repeat);
263}
264
265void
266m5checkpoint(ThreadContext *tc, Tick delay, Tick period)
267{
268    if (!tc->getCpuPtr()->params()->do_checkpoint_insts)
269        return;
270
271    Tick when = curTick + delay * SimClock::Int::ns;
272    Tick repeat = period * SimClock::Int::ns;
273
274    Event *event = new SimLoopExitEvent("checkpoint", 0, repeat);
275    mainEventQueue.schedule(event, when);
276}
277
278#if FULL_SYSTEM
279
280uint64_t
281readfile(ThreadContext *tc, Addr vaddr, uint64_t len, uint64_t offset)
282{
283    const string &file = tc->getSystemPtr()->params()->readfile;
284    if (file.empty()) {
285        return ULL(0);
286    }
287
288    uint64_t result = 0;
289
290    int fd = ::open(file.c_str(), O_RDONLY, 0);
291    if (fd < 0)
292        panic("could not open file %s\n", file);
293
294    if (::lseek(fd, offset, SEEK_SET) < 0)
295        panic("could not seek: %s", strerror(errno));
296
297    char *buf = new char[len];
298    char *p = buf;
299    while (len > 0) {
300        int bytes = ::read(fd, p, len);
301        if (bytes <= 0)
302            break;
303
304        p += bytes;
305        result += bytes;
306        len -= bytes;
307    }
308
309    close(fd);
310    CopyIn(tc, vaddr, buf, result);
311    delete [] buf;
312    return result;
313}
314
315#endif
316
317void
318debugbreak(ThreadContext *tc)
319{
320    debug_break();
321}
322
323void
324switchcpu(ThreadContext *tc)
325{
326    exitSimLoop("switchcpu");
327}
328
329} // namespace PseudoInst
330