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/sampler/sampler.hh"
  41 #include "cpu/thread_context.hh"
  42 #include "cpu/quiesce_event.hh"
  43 #include "kern/kernel_stats.hh"
  44 #include "sim/param.hh"
  45 #include "sim/serialize.hh"
  46 #include "sim/sim_exit.hh"
  47 #include "sim/stat_control.hh"
  48 #include "sim/stats.hh"
  49 #include "sim/system.hh"
  50 #include "sim/debug.hh"
  51 #include "sim/vptr.hh"
  52
  53 using namespace std;
  54
  55 extern Sampler *SampCPU;
  56
  57 using namespace Stats;
  58 using namespace TheISA;
  59
  60 namespace AlphaPseudo
  61 {
  62     bool doStatisticsInsts;
  63     bool doCheckpointInsts;
  64     bool doQuiesce;
  65
  66     void
  67     arm(ThreadContext *tc)
  68     {
  69         if (tc->getKernelStats())
  70             tc->getKernelStats()->arm();
  71     }
  72
  73     void
  74     quiesce(ThreadContext *tc)
  75     {
  76         if (!doQuiesce)
  77             return;
  78
  79         tc->suspend();
  80         if (tc->getKernelStats())
  81             tc->getKernelStats()->quiesce();
  82     }
  83
  84     void
  85     quiesceNs(ThreadContext *tc, uint64_t ns)
  86     {
  87         if (!doQuiesce || ns == 0)
  88             return;
  89
  90         EndQuiesceEvent *quiesceEvent = tc->getQuiesceEvent();
  91
  92         if (quiesceEvent->scheduled())
  93             quiesceEvent->reschedule(curTick + Clock::Int::ns * ns);
  94         else
  95             quiesceEvent->schedule(curTick + Clock::Int::ns * ns);
  96
  97         tc->suspend();
  98         if (tc->getKernelStats())
  99             tc->getKernelStats()->quiesce();
 100     }
 101
 102     void
 103     quiesceCycles(ThreadContext *tc, uint64_t cycles)
 104     {
 105         if (!doQuiesce || cycles == 0)
 106             return;
 107
 108         EndQuiesceEvent *quiesceEvent = tc->getQuiesceEvent();
 109
 110         if (quiesceEvent->scheduled())
 111             quiesceEvent->reschedule(curTick +
 112                                      tc->getCpuPtr()->cycles(cycles));
 113         else
 114             quiesceEvent->schedule(curTick +
 115                                    tc->getCpuPtr()->cycles(cycles));
 116
 117         tc->suspend();
 118         if (tc->getKernelStats())
 119             tc->getKernelStats()->quiesce();
 120     }
 121
 122     uint64_t
 123     quiesceTime(ThreadContext *tc)
 124     {
 125         return (tc->readLastActivate() - tc->readLastSuspend()) / Clock::Int::ns;
 126     }
 127
 128     void
 129     ivlb(ThreadContext *tc)
 130     {
 131         if (tc->getKernelStats())
 132             tc->getKernelStats()->ivlb();
 133     }
 134
 135     void
 136     ivle(ThreadContext *tc)
 137     {
 138     }
 139
 140     void
 141     m5exit_old(ThreadContext *tc)
 142     {
 143         exitSimLoop(curTick, "m5_exit_old instruction encountered");
 144     }
 145
 146     void
 147     m5exit(ThreadContext *tc, Tick delay)
 148     {
 149         Tick when = curTick + delay * Clock::Int::ns;
 150         exitSimLoop(when, "m5_exit instruction encountered");
 151     }
 152
 153     void
 154     resetstats(ThreadContext *tc, Tick delay, Tick period)
 155     {
 156         if (!doStatisticsInsts)
 157             return;
 158
 159
 160         Tick when = curTick + delay * Clock::Int::ns;
 161         Tick repeat = period * Clock::Int::ns;
 162
 163         using namespace Stats;
 164         SetupEvent(Reset, when, repeat);
 165     }
 166
 167     void
 168     dumpstats(ThreadContext *tc, Tick delay, Tick period)
 169     {
 170         if (!doStatisticsInsts)
 171             return;
 172
 173
 174         Tick when = curTick + delay * Clock::Int::ns;
 175         Tick repeat = period * Clock::Int::ns;
 176
 177         using namespace Stats;
 178         SetupEvent(Dump, when, repeat);
 179     }
 180
 181     void
 182     addsymbol(ThreadContext *tc, Addr addr, Addr symbolAddr)
 183     {
 184         char symb[100];
 185         CopyStringOut(tc, symb, symbolAddr, 100);
 186         std::string symbol(symb);
 187
 188         DPRINTF(Loader, "Loaded symbol: %s @ %#llx\n", symbol, addr);
 189
 190         tc->getSystemPtr()->kernelSymtab->insert(addr,symbol);
 191     }
 192
 193     void
 194     dumpresetstats(ThreadContext *tc, Tick delay, Tick period)
 195     {
 196         if (!doStatisticsInsts)
 197             return;
 198
 199
 200         Tick when = curTick + delay * Clock::Int::ns;
 201         Tick repeat = period * Clock::Int::ns;
 202
 203         using namespace Stats;
 204         SetupEvent(Dump|Reset, when, repeat);
 205     }
 206
 207     void
 208     m5checkpoint(ThreadContext *tc, Tick delay, Tick period)
 209     {
 210         if (!doCheckpointInsts)
 211             return;
 212
 213
 214         Tick when = curTick + delay * Clock::Int::ns;
 215         Tick repeat = period * Clock::Int::ns;
 216
 217         Checkpoint::setup(when, repeat);
 218     }
 219
 220     uint64_t
 221     readfile(ThreadContext *tc, Addr vaddr, uint64_t len, uint64_t offset)
 222     {
 223         const string &file = tc->getCpuPtr()->system->params()->readfile;
 224         if (file.empty()) {
 225             return ULL(0);
 226         }
 227
 228         uint64_t result = 0;
 229
 230         int fd = ::open(file.c_str(), O_RDONLY, 0);
 231         if (fd < 0)
 232             panic("could not open file %s\n", file);
 233
 234         if (::lseek(fd, offset, SEEK_SET) < 0)
 235             panic("could not seek: %s", strerror(errno));
 236
 237         char *buf = new char[len];
 238         char *p = buf;
 239         while (len > 0) {
 240             int bytes = ::read(fd, p, len);
 241             if (bytes <= 0)
 242                 break;
 243
 244             p += bytes;
 245             result += bytes;
 246             len -= bytes;
 247         }
 248
 249         close(fd);
 250         CopyIn(tc, vaddr, buf, result);
 251         delete [] buf;
 252         return result;
 253     }
 254
 255     class Context : public ParamContext
 256     {
 257       public:
 258         Context(const string &section) : ParamContext(section) {}
 259         void checkParams();
 260     };
 261
 262     Context context("pseudo_inst");
 263
 264     Param<bool> __quiesce(&context, "quiesce",
 265                           "enable quiesce instructions",
 266                           true);
 267     Param<bool> __statistics(&context, "statistics",
 268                              "enable statistics pseudo instructions",
 269                              true);
 270     Param<bool> __checkpoint(&context, "checkpoint",
 271                              "enable checkpoint pseudo instructions",
 272                              true);
 273
 274     void
 275     Context::checkParams()
 276     {
 277         doQuiesce = __quiesce;
 278         doStatisticsInsts = __statistics;
 279         doCheckpointInsts = __checkpoint;
 280     }
 281
 282     void debugbreak(ThreadContext *tc)
 283     {
 284         debug_break();
 285     }
 286
 287     void switchcpu(ThreadContext *tc)
 288     {
 289         if (SampCPU)
 290             SampCPU->switchCPUs();
 291     }
 292 }