pseudo_inst.cc revision 8666 
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) 2011 Advanced Micro Devices, Inc.
15 * Copyright (c) 2003-2006 The Regents of The University of Michigan
16 * All rights reserved.
17 *
18 * Redistribution and use in source and binary forms, with or without
19 * modification, are permitted provided that the following conditions are
20 * met: redistributions of source code must retain the above copyright
21 * notice, this list of conditions and the following disclaimer;
22 * redistributions in binary form must reproduce the above copyright
23 * notice, this list of conditions and the following disclaimer in the
24 * documentation and/or other materials provided with the distribution;
25 * neither the name of the copyright holders nor the names of its
26 * contributors may be used to endorse or promote products derived from
27 * this software without specific prior written permission.
28 *
29 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
30 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
31 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
32 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
33 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
34 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
35 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
36 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
37 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
38 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
39 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
40 *
41 * Authors: Nathan Binkert
42 */
43
44#include <fcntl.h>
45#include <unistd.h>
46
47#include <cerrno>
48#include <fstream>
49#include <string>
50
51#include "arch/vtophys.hh"
52#include "base/debug.hh"
53#include "config/full_system.hh"
54#include "config/the_isa.hh"
55#include "cpu/base.hh"
56#include "cpu/quiesce_event.hh"
57#include "cpu/thread_context.hh"
58#include "debug/Loader.hh"
59#include "debug/Quiesce.hh"
60#include "debug/WorkItems.hh"
61#include "params/BaseCPU.hh"
62#include "sim/pseudo_inst.hh"
63#include "sim/serialize.hh"
64#include "sim/sim_events.hh"
65#include "sim/sim_exit.hh"
66#include "sim/stat_control.hh"
67#include "sim/stats.hh"
68#include "sim/system.hh"
69
70#if FULL_SYSTEM
71#include "arch/kernel_stats.hh"
72#include "sim/vptr.hh"
73#endif
74
75using namespace std;
76
77using namespace Stats;
78using namespace TheISA;
79
80namespace PseudoInst {
81
82#if FULL_SYSTEM
83
84void
85arm(ThreadContext *tc)
86{
87    if (tc->getKernelStats())
88        tc->getKernelStats()->arm();
89}
90
91void
92quiesce(ThreadContext *tc)
93{
94    if (!tc->getCpuPtr()->params()->do_quiesce)
95        return;
96
97    DPRINTF(Quiesce, "%s: quiesce()\n", tc->getCpuPtr()->name());
98
99    tc->suspend();
100    if (tc->getKernelStats())
101        tc->getKernelStats()->quiesce();
102}
103
104void
105quiesceSkip(ThreadContext *tc)
106{
107    BaseCPU *cpu = tc->getCpuPtr();
108
109    if (!cpu->params()->do_quiesce)
110        return;
111
112    EndQuiesceEvent *quiesceEvent = tc->getQuiesceEvent();
113
114    Tick resume = curTick() + 1;
115
116    cpu->reschedule(quiesceEvent, resume, true);
117
118    DPRINTF(Quiesce, "%s: quiesceSkip() until %d\n",
119            cpu->name(), resume);
120
121    tc->suspend();
122    if (tc->getKernelStats())
123        tc->getKernelStats()->quiesce();
124}
125
126void
127quiesceNs(ThreadContext *tc, uint64_t ns)
128{
129    BaseCPU *cpu = tc->getCpuPtr();
130
131    if (!cpu->params()->do_quiesce || ns == 0)
132        return;
133
134    EndQuiesceEvent *quiesceEvent = tc->getQuiesceEvent();
135
136    Tick resume = curTick() + SimClock::Int::ns * ns;
137
138    cpu->reschedule(quiesceEvent, resume, true);
139
140    DPRINTF(Quiesce, "%s: quiesceNs(%d) until %d\n",
141            cpu->name(), ns, resume);
142
143    tc->suspend();
144    if (tc->getKernelStats())
145        tc->getKernelStats()->quiesce();
146}
147
148void
149quiesceCycles(ThreadContext *tc, uint64_t cycles)
150{
151    BaseCPU *cpu = tc->getCpuPtr();
152
153    if (!cpu->params()->do_quiesce || cycles == 0)
154        return;
155
156    EndQuiesceEvent *quiesceEvent = tc->getQuiesceEvent();
157
158    Tick resume = curTick() + cpu->ticks(cycles);
159
160    cpu->reschedule(quiesceEvent, resume, true);
161
162    DPRINTF(Quiesce, "%s: quiesceCycles(%d) until %d\n",
163            cpu->name(), cycles, resume);
164
165    tc->suspend();
166    if (tc->getKernelStats())
167        tc->getKernelStats()->quiesce();
168}
169
170uint64_t
171quiesceTime(ThreadContext *tc)
172{
173    return (tc->readLastActivate() - tc->readLastSuspend()) /
174        SimClock::Int::ns;
175}
176
177#endif
178
179uint64_t
180rpns(ThreadContext *tc)
181{
182    return curTick() / SimClock::Int::ns;
183}
184
185void
186wakeCPU(ThreadContext *tc, uint64_t cpuid)
187{
188    System *sys = tc->getSystemPtr();
189    ThreadContext *other_tc = sys->threadContexts[cpuid];
190    if (other_tc->status() == ThreadContext::Suspended)
191        other_tc->activate();
192}
193
194void
195m5exit(ThreadContext *tc, Tick delay)
196{
197    Tick when = curTick() + delay * SimClock::Int::ns;
198    exitSimLoop("m5_exit instruction encountered", 0, when);
199}
200
201#if FULL_SYSTEM
202
203void
204loadsymbol(ThreadContext *tc)
205{
206    const string &filename = tc->getCpuPtr()->system->params()->symbolfile;
207    if (filename.empty()) {
208        return;
209    }
210
211    std::string buffer;
212    ifstream file(filename.c_str());
213
214    if (!file)
215        fatal("file error: Can't open symbol table file %s\n", filename);
216
217    while (!file.eof()) {
218        getline(file, buffer);
219
220        if (buffer.empty())
221            continue;
222
223        string::size_type idx = buffer.find(' ');
224        if (idx == string::npos)
225            continue;
226
227        string address = "0x" + buffer.substr(0, idx);
228        eat_white(address);
229        if (address.empty())
230            continue;
231
232        // Skip over letter and space
233        string symbol = buffer.substr(idx + 3);
234        eat_white(symbol);
235        if (symbol.empty())
236            continue;
237
238        Addr addr;
239        if (!to_number(address, addr))
240            continue;
241
242        if (!tc->getSystemPtr()->kernelSymtab->insert(addr, symbol))
243            continue;
244
245
246        DPRINTF(Loader, "Loaded symbol: %s @ %#llx\n", symbol, addr);
247    }
248    file.close();
249}
250
251void
252addsymbol(ThreadContext *tc, Addr addr, Addr symbolAddr)
253{
254    char symb[100];
255    CopyStringOut(tc, symb, symbolAddr, 100);
256    std::string symbol(symb);
257
258    DPRINTF(Loader, "Loaded symbol: %s @ %#llx\n", symbol, addr);
259
260    tc->getSystemPtr()->kernelSymtab->insert(addr,symbol);
261    debugSymbolTable->insert(addr,symbol);
262}
263
264uint64_t
265initParam(ThreadContext *tc)
266{
267    return tc->getCpuPtr()->system->init_param;
268}
269
270#endif
271
272
273void
274resetstats(ThreadContext *tc, Tick delay, Tick period)
275{
276    if (!tc->getCpuPtr()->params()->do_statistics_insts)
277        return;
278
279
280    Tick when = curTick() + delay * SimClock::Int::ns;
281    Tick repeat = period * SimClock::Int::ns;
282
283    Stats::schedStatEvent(false, true, when, repeat);
284}
285
286void
287dumpstats(ThreadContext *tc, Tick delay, Tick period)
288{
289    if (!tc->getCpuPtr()->params()->do_statistics_insts)
290        return;
291
292
293    Tick when = curTick() + delay * SimClock::Int::ns;
294    Tick repeat = period * SimClock::Int::ns;
295
296    Stats::schedStatEvent(true, false, when, repeat);
297}
298
299void
300dumpresetstats(ThreadContext *tc, Tick delay, Tick period)
301{
302    if (!tc->getCpuPtr()->params()->do_statistics_insts)
303        return;
304
305
306    Tick when = curTick() + delay * SimClock::Int::ns;
307    Tick repeat = period * SimClock::Int::ns;
308
309    Stats::schedStatEvent(true, true, when, repeat);
310}
311
312void
313m5checkpoint(ThreadContext *tc, Tick delay, Tick period)
314{
315    if (!tc->getCpuPtr()->params()->do_checkpoint_insts)
316        return;
317
318    Tick when = curTick() + delay * SimClock::Int::ns;
319    Tick repeat = period * SimClock::Int::ns;
320
321    exitSimLoop("checkpoint", 0, when, repeat);
322}
323
324#if FULL_SYSTEM
325
326uint64_t
327readfile(ThreadContext *tc, Addr vaddr, uint64_t len, uint64_t offset)
328{
329    const string &file = tc->getSystemPtr()->params()->readfile;
330    if (file.empty()) {
331        return ULL(0);
332    }
333
334    uint64_t result = 0;
335
336    int fd = ::open(file.c_str(), O_RDONLY, 0);
337    if (fd < 0)
338        panic("could not open file %s\n", file);
339
340    if (::lseek(fd, offset, SEEK_SET) < 0)
341        panic("could not seek: %s", strerror(errno));
342
343    char *buf = new char[len];
344    char *p = buf;
345    while (len > 0) {
346        int bytes = ::read(fd, p, len);
347        if (bytes <= 0)
348            break;
349
350        p += bytes;
351        result += bytes;
352        len -= bytes;
353    }
354
355    close(fd);
356    CopyIn(tc, vaddr, buf, result);
357    delete [] buf;
358    return result;
359}
360
361#endif
362
363void
364debugbreak(ThreadContext *tc)
365{
366    Debug::breakpoint();
367}
368
369void
370switchcpu(ThreadContext *tc)
371{
372    exitSimLoop("switchcpu");
373}
374
375//
376// This function is executed when annotated work items begin.  Depending on
377// what the user specified at the command line, the simulation may exit and/or
378// take a checkpoint when a certain work item begins.
379//
380void
381workbegin(ThreadContext *tc, uint64_t workid, uint64_t threadid)
382{
383    tc->getCpuPtr()->workItemBegin();
384    System *sys = tc->getSystemPtr();
385    const System::Params *params = sys->params();
386    sys->workItemBegin(threadid, workid);
387
388    DPRINTF(WorkItems, "Work Begin workid: %d, threadid %d\n", workid,
389            threadid);
390
391    //
392    // If specified, determine if this is the specific work item the user
393    // identified
394    //
395    if (params->work_item_id == -1 || params->work_item_id == workid) {
396
397        uint64_t systemWorkBeginCount = sys->incWorkItemsBegin();
398        int cpuId = tc->getCpuPtr()->cpuId();
399
400        if (params->work_cpus_ckpt_count != 0 &&
401            sys->markWorkItem(cpuId) >= params->work_cpus_ckpt_count) {
402            //
403            // If active cpus equals checkpoint count, create checkpoint
404            //
405            exitSimLoop("checkpoint");
406        }
407
408        if (systemWorkBeginCount == params->work_begin_ckpt_count) {
409            //
410            // Note: the string specified as the cause of the exit event must
411            // exactly equal "checkpoint" inorder to create a checkpoint
412            //
413            exitSimLoop("checkpoint");
414        }
415
416        if (systemWorkBeginCount == params->work_begin_exit_count) {
417            //
418            // If a certain number of work items started, exit simulation
419            //
420            exitSimLoop("work started count reach");
421        }
422
423        if (cpuId == params->work_begin_cpu_id_exit) {
424            //
425            // If work started on the cpu id specified, exit simulation
426            //
427            exitSimLoop("work started on specific cpu");
428        }
429    }
430}
431
432//
433// This function is executed when annotated work items end.  Depending on
434// what the user specified at the command line, the simulation may exit and/or
435// take a checkpoint when a certain work item ends.
436//
437void
438workend(ThreadContext *tc, uint64_t workid, uint64_t threadid)
439{
440    tc->getCpuPtr()->workItemEnd();
441    System *sys = tc->getSystemPtr();
442    const System::Params *params = sys->params();
443    sys->workItemEnd(threadid, workid);
444
445    DPRINTF(WorkItems, "Work End workid: %d, threadid %d\n", workid, threadid);
446
447    //
448    // If specified, determine if this is the specific work item the user
449    // identified
450    //
451    if (params->work_item_id == -1 || params->work_item_id == workid) {
452
453        uint64_t systemWorkEndCount = sys->incWorkItemsEnd();
454        int cpuId = tc->getCpuPtr()->cpuId();
455
456        if (params->work_cpus_ckpt_count != 0 &&
457            sys->markWorkItem(cpuId) >= params->work_cpus_ckpt_count) {
458            //
459            // If active cpus equals checkpoint count, create checkpoint
460            //
461            exitSimLoop("checkpoint");
462        }
463
464        if (params->work_end_ckpt_count != 0 &&
465            systemWorkEndCount == params->work_end_ckpt_count) {
466            //
467            // If total work items completed equals checkpoint count, create
468            // checkpoint
469            //
470            exitSimLoop("checkpoint");
471        }
472
473        if (params->work_end_exit_count != 0 &&
474            systemWorkEndCount == params->work_end_exit_count) {
475            //
476            // If total work items completed equals exit count, exit simulation
477            //
478            exitSimLoop("work items exit count reached");
479        }
480    }
481}
482
483} // namespace PseudoInst
484