pseudo_inst.cc revision 8232 
1/*
2 * Copyright (c) 2010 ARM Limited
3 * All rights reserved
4 *
5 * The license below extends only to copyright in the software and shall
6 * not be construed as granting a license to any other intellectual
7 * property including but not limited to intellectual property relating
8 * to a hardware implementation of the functionality of the software
9 * licensed hereunder.  You may use the software subject to the license
10 * terms below provided that you ensure that this notice is replicated
11 * unmodified and in its entirety in all distributions of the software,
12 * modified or unmodified, in source code or in binary form.
13 *
14 * Copyright (c) 2003-2006 The Regents of The University of Michigan
15 * All rights reserved.
16 *
17 * Redistribution and use in source and binary forms, with or without
18 * modification, are permitted provided that the following conditions are
19 * met: redistributions of source code must retain the above copyright
20 * notice, this list of conditions and the following disclaimer;
21 * redistributions in binary form must reproduce the above copyright
22 * notice, this list of conditions and the following disclaimer in the
23 * documentation and/or other materials provided with the distribution;
24 * neither the name of the copyright holders nor the names of its
25 * contributors may be used to endorse or promote products derived from
26 * this software without specific prior written permission.
27 *
28 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
29 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
30 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
31 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
32 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
33 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
34 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
35 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
36 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
37 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
38 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
39 *
40 * Authors: Nathan Binkert
41 */
42
43#include <fcntl.h>
44#include <unistd.h>
45
46#include <cerrno>
47#include <fstream>
48#include <string>
49
50#include "arch/vtophys.hh"
51#include "base/debug.hh"
52#include "config/full_system.hh"
53#include "config/the_isa.hh"
54#include "cpu/base.hh"
55#include "cpu/quiesce_event.hh"
56#include "cpu/thread_context.hh"
57#include "debug/Loader.hh"
58#include "debug/Quiesce.hh"
59#include "debug/WorkItems.hh"
60#include "params/BaseCPU.hh"
61#include "sim/pseudo_inst.hh"
62#include "sim/serialize.hh"
63#include "sim/sim_events.hh"
64#include "sim/sim_exit.hh"
65#include "sim/stat_control.hh"
66#include "sim/stats.hh"
67#include "sim/system.hh"
68
69#if FULL_SYSTEM
70#include "arch/kernel_stats.hh"
71#include "sim/vptr.hh"
72#endif
73
74using namespace std;
75
76using namespace Stats;
77using namespace TheISA;
78
79namespace PseudoInst {
80
81#if FULL_SYSTEM
82
83void
84arm(ThreadContext *tc)
85{
86    if (tc->getKernelStats())
87        tc->getKernelStats()->arm();
88}
89
90void
91quiesce(ThreadContext *tc)
92{
93    if (!tc->getCpuPtr()->params()->do_quiesce)
94        return;
95
96    DPRINTF(Quiesce, "%s: quiesce()\n", tc->getCpuPtr()->name());
97
98    tc->suspend();
99    if (tc->getKernelStats())
100        tc->getKernelStats()->quiesce();
101}
102
103void
104quiesceSkip(ThreadContext *tc)
105{
106    BaseCPU *cpu = tc->getCpuPtr();
107
108    if (!cpu->params()->do_quiesce)
109        return;
110
111    EndQuiesceEvent *quiesceEvent = tc->getQuiesceEvent();
112
113    Tick resume = curTick() + 1;
114
115    cpu->reschedule(quiesceEvent, resume, true);
116
117    DPRINTF(Quiesce, "%s: quiesceSkip() until %d\n",
118            cpu->name(), resume);
119
120    tc->suspend();
121    if (tc->getKernelStats())
122        tc->getKernelStats()->quiesce();
123}
124
125void
126quiesceNs(ThreadContext *tc, uint64_t ns)
127{
128    BaseCPU *cpu = tc->getCpuPtr();
129
130    if (!cpu->params()->do_quiesce || ns == 0)
131        return;
132
133    EndQuiesceEvent *quiesceEvent = tc->getQuiesceEvent();
134
135    Tick resume = curTick() + SimClock::Int::ns * ns;
136
137    cpu->reschedule(quiesceEvent, resume, true);
138
139    DPRINTF(Quiesce, "%s: quiesceNs(%d) until %d\n",
140            cpu->name(), ns, resume);
141
142    tc->suspend();
143    if (tc->getKernelStats())
144        tc->getKernelStats()->quiesce();
145}
146
147void
148quiesceCycles(ThreadContext *tc, uint64_t cycles)
149{
150    BaseCPU *cpu = tc->getCpuPtr();
151
152    if (!cpu->params()->do_quiesce || cycles == 0)
153        return;
154
155    EndQuiesceEvent *quiesceEvent = tc->getQuiesceEvent();
156
157    Tick resume = curTick() + cpu->ticks(cycles);
158
159    cpu->reschedule(quiesceEvent, resume, true);
160
161    DPRINTF(Quiesce, "%s: quiesceCycles(%d) until %d\n",
162            cpu->name(), cycles, resume);
163
164    tc->suspend();
165    if (tc->getKernelStats())
166        tc->getKernelStats()->quiesce();
167}
168
169uint64_t
170quiesceTime(ThreadContext *tc)
171{
172    return (tc->readLastActivate() - tc->readLastSuspend()) /
173        SimClock::Int::ns;
174}
175
176#endif
177
178uint64_t
179rpns(ThreadContext *tc)
180{
181    return curTick() / SimClock::Int::ns;
182}
183
184void
185wakeCPU(ThreadContext *tc, uint64_t cpuid)
186{
187    System *sys = tc->getSystemPtr();
188    ThreadContext *other_tc = sys->threadContexts[cpuid];
189    if (other_tc->status() == ThreadContext::Suspended)
190        other_tc->activate();
191}
192
193void
194m5exit(ThreadContext *tc, Tick delay)
195{
196    Tick when = curTick() + delay * SimClock::Int::ns;
197    exitSimLoop("m5_exit instruction encountered", 0, when);
198}
199
200#if FULL_SYSTEM
201
202void
203loadsymbol(ThreadContext *tc)
204{
205    const string &filename = tc->getCpuPtr()->system->params()->symbolfile;
206    if (filename.empty()) {
207        return;
208    }
209
210    std::string buffer;
211    ifstream file(filename.c_str());
212
213    if (!file)
214        fatal("file error: Can't open symbol table file %s\n", filename);
215
216    while (!file.eof()) {
217        getline(file, buffer);
218
219        if (buffer.empty())
220            continue;
221
222        string::size_type idx = buffer.find(' ');
223        if (idx == string::npos)
224            continue;
225
226        string address = "0x" + buffer.substr(0, idx);
227        eat_white(address);
228        if (address.empty())
229            continue;
230
231        // Skip over letter and space
232        string symbol = buffer.substr(idx + 3);
233        eat_white(symbol);
234        if (symbol.empty())
235            continue;
236
237        Addr addr;
238        if (!to_number(address, addr))
239            continue;
240
241        if (!tc->getSystemPtr()->kernelSymtab->insert(addr, symbol))
242            continue;
243
244
245        DPRINTF(Loader, "Loaded symbol: %s @ %#llx\n", symbol, addr);
246    }
247    file.close();
248}
249
250void
251addsymbol(ThreadContext *tc, Addr addr, Addr symbolAddr)
252{
253    char symb[100];
254    CopyStringOut(tc, symb, symbolAddr, 100);
255    std::string symbol(symb);
256
257    DPRINTF(Loader, "Loaded symbol: %s @ %#llx\n", symbol, addr);
258
259    tc->getSystemPtr()->kernelSymtab->insert(addr,symbol);
260    debugSymbolTable->insert(addr,symbol);
261}
262
263#endif
264
265
266void
267resetstats(ThreadContext *tc, Tick delay, Tick period)
268{
269    if (!tc->getCpuPtr()->params()->do_statistics_insts)
270        return;
271
272
273    Tick when = curTick() + delay * SimClock::Int::ns;
274    Tick repeat = period * SimClock::Int::ns;
275
276    Stats::schedStatEvent(false, true, when, repeat);
277}
278
279void
280dumpstats(ThreadContext *tc, Tick delay, Tick period)
281{
282    if (!tc->getCpuPtr()->params()->do_statistics_insts)
283        return;
284
285
286    Tick when = curTick() + delay * SimClock::Int::ns;
287    Tick repeat = period * SimClock::Int::ns;
288
289    Stats::schedStatEvent(true, false, when, repeat);
290}
291
292void
293dumpresetstats(ThreadContext *tc, Tick delay, Tick period)
294{
295    if (!tc->getCpuPtr()->params()->do_statistics_insts)
296        return;
297
298
299    Tick when = curTick() + delay * SimClock::Int::ns;
300    Tick repeat = period * SimClock::Int::ns;
301
302    Stats::schedStatEvent(true, true, when, repeat);
303}
304
305void
306m5checkpoint(ThreadContext *tc, Tick delay, Tick period)
307{
308    if (!tc->getCpuPtr()->params()->do_checkpoint_insts)
309        return;
310
311    Tick when = curTick() + delay * SimClock::Int::ns;
312    Tick repeat = period * SimClock::Int::ns;
313
314    exitSimLoop("checkpoint", 0, when, repeat);
315}
316
317#if FULL_SYSTEM
318
319uint64_t
320readfile(ThreadContext *tc, Addr vaddr, uint64_t len, uint64_t offset)
321{
322    const string &file = tc->getSystemPtr()->params()->readfile;
323    if (file.empty()) {
324        return ULL(0);
325    }
326
327    uint64_t result = 0;
328
329    int fd = ::open(file.c_str(), O_RDONLY, 0);
330    if (fd < 0)
331        panic("could not open file %s\n", file);
332
333    if (::lseek(fd, offset, SEEK_SET) < 0)
334        panic("could not seek: %s", strerror(errno));
335
336    char *buf = new char[len];
337    char *p = buf;
338    while (len > 0) {
339        int bytes = ::read(fd, p, len);
340        if (bytes <= 0)
341            break;
342
343        p += bytes;
344        result += bytes;
345        len -= bytes;
346    }
347
348    close(fd);
349    CopyIn(tc, vaddr, buf, result);
350    delete [] buf;
351    return result;
352}
353
354#endif
355
356void
357debugbreak(ThreadContext *tc)
358{
359    Debug::breakpoint();
360}
361
362void
363switchcpu(ThreadContext *tc)
364{
365    exitSimLoop("switchcpu");
366}
367
368//
369// This function is executed when annotated work items begin.  Depending on
370// what the user specified at the command line, the simulation may exit and/or
371// take a checkpoint when a certain work item begins.
372//
373void
374workbegin(ThreadContext *tc, uint64_t workid, uint64_t threadid)
375{
376    tc->getCpuPtr()->workItemBegin();
377    System *sys = tc->getSystemPtr();
378
379    DPRINTF(WorkItems, "Work Begin workid: %d, threadid %d\n", workid,
380            threadid);
381
382    //
383    // If specified, determine if this is the specific work item the user
384    // identified
385    //
386    if (sys->params()->work_item_id == -1 ||
387        sys->params()->work_item_id == workid) {
388
389        uint64_t systemWorkBeginCount = sys->incWorkItemsBegin();
390        int cpuId = tc->getCpuPtr()->cpuId();
391
392        if (sys->params()->work_cpus_ckpt_count != 0 &&
393            sys->markWorkItem(cpuId) >= sys->params()->work_cpus_ckpt_count) {
394            //
395            // If active cpus equals checkpoint count, create checkpoint
396            //
397            Event *event = new SimLoopExitEvent("checkpoint", 0);
398            mainEventQueue.schedule(event, curTick());
399        }
400
401        if (systemWorkBeginCount == sys->params()->work_begin_ckpt_count) {
402            //
403            // Note: the string specified as the cause of the exit event must
404            // exactly equal "checkpoint" inorder to create a checkpoint
405            //
406            Event *event = new SimLoopExitEvent("checkpoint", 0);
407            mainEventQueue.schedule(event, curTick());
408        }
409
410        if (systemWorkBeginCount == sys->params()->work_begin_exit_count) {
411            //
412            // If a certain number of work items started, exit simulation
413            //
414            Event *event = new SimLoopExitEvent("work started count reach", 0);
415            mainEventQueue.schedule(event, curTick());
416        }
417
418        if (tc->getCpuPtr()->cpuId() == sys->params()->work_begin_cpu_id_exit) {
419            //
420            // If work started on the specific cpu id specified, exit simulation
421            //
422            Event *event = new SimLoopExitEvent("work started on specific cpu",
423                                                0);
424
425            mainEventQueue.schedule(event, curTick() + 1);
426        }
427    }
428}
429
430//
431// This function is executed when annotated work items end.  Depending on
432// what the user specified at the command line, the simulation may exit and/or
433// take a checkpoint when a certain work item ends.
434//
435void
436workend(ThreadContext *tc, uint64_t workid, uint64_t threadid)
437{
438    tc->getCpuPtr()->workItemEnd();
439    System *sys = tc->getSystemPtr();
440
441    DPRINTF(WorkItems, "Work End workid: %d, threadid %d\n", workid, threadid);
442
443    //
444    // If specified, determine if this is the specific work item the user
445    // identified
446    //
447    if (sys->params()->work_item_id == -1 ||
448        sys->params()->work_item_id == workid) {
449
450        uint64_t systemWorkEndCount = sys->incWorkItemsEnd();
451        int cpuId = tc->getCpuPtr()->cpuId();
452
453        if (sys->params()->work_cpus_ckpt_count != 0 &&
454            sys->markWorkItem(cpuId) >= sys->params()->work_cpus_ckpt_count) {
455            //
456            // If active cpus equals checkpoint count, create checkpoint
457            //
458            Event *event = new SimLoopExitEvent("checkpoint", 0);
459            mainEventQueue.schedule(event, curTick());
460        }
461
462        if (sys->params()->work_end_ckpt_count != 0 &&
463            systemWorkEndCount == sys->params()->work_end_ckpt_count) {
464            //
465            // If total work items completed equals checkpoint count, create
466            // checkpoint
467            //
468            Event *event = new SimLoopExitEvent("checkpoint", 0);
469            mainEventQueue.schedule(event, curTick());
470        }
471
472        if (sys->params()->work_end_exit_count != 0 &&
473            systemWorkEndCount == sys->params()->work_end_exit_count) {
474            //
475            // If total work items completed equals exit count, exit simulation
476            //
477            Event *event = new SimLoopExitEvent("work items exit count reached",
478                                                0);
479
480            mainEventQueue.schedule(event, curTick());
481        }
482    }
483}
484
485} // namespace PseudoInst
486