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