src/sim/pseudo_inst.cc

   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
  29 #include <errno.h>
  30 #include <fcntl.h>
  31 #include <unistd.h>
  32
  33 #include <string>
  34
  35 #include "sim/pseudo_inst.hh"
  36 #include "arch/vtophys.hh"
  37 #include "cpu/base.hh"
  38 #include "cpu/sampler/sampler.hh"
  39 #include "cpu/exec_context.hh"
  40 #include "cpu/quiesce_event.hh"
  41 #include "kern/kernel_stats.hh"
  42 #include "sim/param.hh"
  43 #include "sim/serialize.hh"
  44 #include "sim/sim_exit.hh"
  45 #include "sim/stat_control.hh"
  46 #include "sim/stats.hh"
  47 #include "sim/system.hh"
  48 #include "sim/debug.hh"
  49 #include "sim/vptr.hh"
  50
  51 using namespace std;
  52
  53 extern Sampler *SampCPU;
  54
  55 using namespace Stats;
  56 using namespace TheISA;
  57
  58 namespace AlphaPseudo
  59 {
  60     bool doStatisticsInsts;
  61     bool doCheckpointInsts;
  62     bool doQuiesce;
  63
  64     void
  65     arm(ExecContext *xc)
  66     {
  67         if (xc->getKernelStats())
  68             xc->getKernelStats()->arm();
  69     }
  70
  71     void
  72     quiesce(ExecContext *xc)
  73     {
  74         if (!doQuiesce)
  75             return;
  76
  77         xc->suspend();
  78         if (xc->getKernelStats())
  79             xc->getKernelStats()->quiesce();
  80     }
  81
  82     void
  83     quiesceNs(ExecContext *xc, uint64_t ns)
  84     {
  85         if (!doQuiesce || ns == 0)
  86             return;
  87
  88         EndQuiesceEvent *quiesceEvent = xc->getQuiesceEvent();
  89
  90         if (quiesceEvent->scheduled())
  91             quiesceEvent->reschedule(curTick + Clock::Int::ns * ns);
  92         else
  93             quiesceEvent->schedule(curTick + Clock::Int::ns * ns);
  94
  95         xc->suspend();
  96         if (xc->getKernelStats())
  97             xc->getKernelStats()->quiesce();
  98     }
  99
 100     void
 101     quiesceCycles(ExecContext *xc, uint64_t cycles)
 102     {
 103         if (!doQuiesce || cycles == 0)
 104             return;
 105
 106         EndQuiesceEvent *quiesceEvent = xc->getQuiesceEvent();
 107
 108         if (quiesceEvent->scheduled())
 109             quiesceEvent->reschedule(curTick +
 110                                      xc->getCpuPtr()->cycles(cycles));
 111         else
 112             quiesceEvent->schedule(curTick +
 113                                    xc->getCpuPtr()->cycles(cycles));
 114
 115         xc->suspend();
 116         if (xc->getKernelStats())
 117             xc->getKernelStats()->quiesce();
 118     }
 119
 120     uint64_t
 121     quiesceTime(ExecContext *xc)
 122     {
 123         return (xc->readLastActivate() - xc->readLastSuspend()) / Clock::Int::ns;
 124     }
 125
 126     void
 127     ivlb(ExecContext *xc)
 128     {
 129         if (xc->getKernelStats())
 130             xc->getKernelStats()->ivlb();
 131     }
 132
 133     void
 134     ivle(ExecContext *xc)
 135     {
 136     }
 137
 138     void
 139     m5exit_old(ExecContext *xc)
 140     {
 141         SimExit(curTick, "m5_exit_old instruction encountered");
 142     }
 143
 144     void
 145     m5exit(ExecContext *xc, Tick delay)
 146     {
 147         Tick when = curTick + delay * Clock::Int::ns;
 148         SimExit(when, "m5_exit instruction encountered");
 149     }
 150
 151     void
 152     resetstats(ExecContext *xc, Tick delay, Tick period)
 153     {
 154         if (!doStatisticsInsts)
 155             return;
 156
 157
 158         Tick when = curTick + delay * Clock::Int::ns;
 159         Tick repeat = period * Clock::Int::ns;
 160
 161         using namespace Stats;
 162         SetupEvent(Reset, when, repeat);
 163     }
 164
 165     void
 166     dumpstats(ExecContext *xc, Tick delay, Tick period)
 167     {
 168         if (!doStatisticsInsts)
 169             return;
 170
 171
 172         Tick when = curTick + delay * Clock::Int::ns;
 173         Tick repeat = period * Clock::Int::ns;
 174
 175         using namespace Stats;
 176         SetupEvent(Dump, when, repeat);
 177     }
 178
 179     void
 180     addsymbol(ExecContext *xc, Addr addr, Addr symbolAddr)
 181     {
 182         char symb[100];
 183         CopyStringOut(xc, symb, symbolAddr, 100);
 184         std::string symbol(symb);
 185
 186         DPRINTF(Loader, "Loaded symbol: %s @ %#llx\n", symbol, addr);
 187
 188         xc->getSystemPtr()->kernelSymtab->insert(addr,symbol);
 189     }
 190
 191     void
 192     dumpresetstats(ExecContext *xc, Tick delay, Tick period)
 193     {
 194         if (!doStatisticsInsts)
 195             return;
 196
 197
 198         Tick when = curTick + delay * Clock::Int::ns;
 199         Tick repeat = period * Clock::Int::ns;
 200
 201         using namespace Stats;
 202         SetupEvent(Dump|Reset, when, repeat);
 203     }
 204
 205     void
 206     m5checkpoint(ExecContext *xc, Tick delay, Tick period)
 207     {
 208         if (!doCheckpointInsts)
 209             return;
 210
 211
 212         Tick when = curTick + delay * Clock::Int::ns;
 213         Tick repeat = period * Clock::Int::ns;
 214
 215         Checkpoint::setup(when, repeat);
 216     }
 217
 218     uint64_t
 219     readfile(ExecContext *xc, Addr vaddr, uint64_t len, uint64_t offset)
 220     {
 221         const string &file = xc->getCpuPtr()->system->params()->readfile;
 222         if (file.empty()) {
 223             return ULL(0);
 224         }
 225
 226         uint64_t result = 0;
 227
 228         int fd = ::open(file.c_str(), O_RDONLY, 0);
 229         if (fd < 0)
 230             panic("could not open file %s\n", file);
 231
 232         if (::lseek(fd, offset, SEEK_SET) < 0)
 233             panic("could not seek: %s", strerror(errno));
 234
 235         char *buf = new char[len];
 236         char *p = buf;
 237         while (len > 0) {
 238             int bytes = ::read(fd, p, len);
 239             if (bytes <= 0)
 240                 break;
 241
 242             p += bytes;
 243             result += bytes;
 244             len -= bytes;
 245         }
 246
 247         close(fd);
 248         CopyIn(xc, vaddr, buf, result);
 249         delete [] buf;
 250         return result;
 251     }
 252
 253     class Context : public ParamContext
 254     {
 255       public:
 256         Context(const string &section) : ParamContext(section) {}
 257         void checkParams();
 258     };
 259
 260     Context context("pseudo_inst");
 261
 262     Param<bool> __quiesce(&context, "quiesce",
 263                           "enable quiesce instructions",
 264                           true);
 265     Param<bool> __statistics(&context, "statistics",
 266                              "enable statistics pseudo instructions",
 267                              true);
 268     Param<bool> __checkpoint(&context, "checkpoint",
 269                              "enable checkpoint pseudo instructions",
 270                              true);
 271
 272     void
 273     Context::checkParams()
 274     {
 275         doQuiesce = __quiesce;
 276         doStatisticsInsts = __statistics;
 277         doCheckpointInsts = __checkpoint;
 278     }
 279
 280     void debugbreak(ExecContext *xc)
 281     {
 282         debug_break();
 283     }
 284
 285     void switchcpu(ExecContext *xc)
 286     {
 287         if (SampCPU)
 288             SampCPU->switchCPUs();
 289     }
 290 }