sim/pseudo_inst.cc

   1 /*
   2  * Copyright (c) 2003-2005 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 #include <cstdio>
  33
  34 #include <string>
  35
  36 #include "sim/pseudo_inst.hh"
  37 #include "targetarch/vtophys.hh"
  38 #include "cpu/base.hh"
  39 #include "cpu/sampler/sampler.hh"
  40 #include "cpu/exec_context.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         xc->kernelStats->arm();
  68     }
  69
  70     void
  71     quiesce(ExecContext *xc)
  72     {
  73         if (!doQuiesce)
  74             return;
  75
  76         xc->suspend();
  77         xc->kernelStats->quiesce();
  78     }
  79
  80     void
  81     ivlb(ExecContext *xc)
  82     {
  83         xc->kernelStats->ivlb();
  84     }
  85
  86     void
  87     ivle(ExecContext *xc)
  88     {
  89     }
  90
  91     void
  92     m5exit_old(ExecContext *xc)
  93     {
  94         SimExit(curTick, "m5_exit_old instruction encountered");
  95     }
  96
  97     void
  98     m5exit(ExecContext *xc, Tick delay)
  99     {
 100         Tick when = curTick + delay * Clock::Int::ns;
 101         SimExit(when, "m5_exit instruction encountered");
 102     }
 103
 104     void
 105     resetstats(ExecContext *xc, Tick delay, Tick period)
 106     {
 107         if (!doStatisticsInsts)
 108             return;
 109
 110
 111         Tick when = curTick + delay * Clock::Int::ns;
 112         Tick repeat = period * Clock::Int::ns;
 113
 114         using namespace Stats;
 115         SetupEvent(Reset, when, repeat);
 116     }
 117
 118     void
 119     dumpstats(ExecContext *xc, Tick delay, Tick period)
 120     {
 121         if (!doStatisticsInsts)
 122             return;
 123
 124
 125         Tick when = curTick + delay * Clock::Int::ns;
 126         Tick repeat = period * Clock::Int::ns;
 127
 128         using namespace Stats;
 129         SetupEvent(Dump, when, repeat);
 130     }
 131
 132     void
 133     addsymbol(ExecContext *xc, Addr addr, Addr symbolAddr)
 134     {
 135         char symb[100];
 136         CopyString(xc, symb, symbolAddr, 100);
 137         std::string symbol(symb);
 138
 139         DPRINTF(Loader, "Loaded symbol: %s @ %#llx\n", symbol, addr);
 140
 141         xc->system->kernelSymtab->insert(addr,symbol);
 142     }
 143
 144     void
 145     dumpresetstats(ExecContext *xc, Tick delay, Tick period)
 146     {
 147         if (!doStatisticsInsts)
 148             return;
 149
 150
 151         Tick when = curTick + delay * Clock::Int::ns;
 152         Tick repeat = period * Clock::Int::ns;
 153
 154         using namespace Stats;
 155         SetupEvent(Dump|Reset, when, repeat);
 156     }
 157
 158     void
 159     m5checkpoint(ExecContext *xc, Tick delay, Tick period)
 160     {
 161         if (!doCheckpointInsts)
 162             return;
 163
 164
 165         Tick when = curTick + delay * Clock::Int::ns;
 166         Tick repeat = period * Clock::Int::ns;
 167
 168         Checkpoint::setup(when, repeat);
 169     }
 170
 171     uint64_t
 172     readfile(ExecContext *xc, Addr vaddr, uint64_t len, uint64_t offset)
 173     {
 174         const string &file = xc->cpu->system->params->readfile;
 175         if (file.empty()) {
 176             return ULL(0);
 177         }
 178
 179         uint64_t result = 0;
 180
 181         int fd = ::open(file.c_str(), O_RDONLY, 0);
 182         if (fd < 0)
 183             panic("could not open file %s\n", file);
 184
 185         if (::lseek(fd, offset, SEEK_SET) < 0)
 186             panic("could not seek: %s", strerror(errno));
 187
 188         char *buf = new char[len];
 189         char *p = buf;
 190         while (len > 0) {
 191             int bytes = ::read(fd, p, len);
 192             if (bytes <= 0)
 193                 break;
 194
 195             p += bytes;
 196             result += bytes;
 197             len -= bytes;
 198         }
 199
 200         close(fd);
 201         CopyIn(xc, vaddr, buf, result);
 202         delete [] buf;
 203         return result;
 204     }
 205
 206     class Context : public ParamContext
 207     {
 208       public:
 209         Context(const string &section) : ParamContext(section) {}
 210         void checkParams();
 211     };
 212
 213     Context context("pseudo_inst");
 214
 215     Param<bool> __quiesce(&context, "quiesce",
 216                           "enable quiesce instructions",
 217                           true);
 218     Param<bool> __statistics(&context, "statistics",
 219                              "enable statistics pseudo instructions",
 220                              true);
 221     Param<bool> __checkpoint(&context, "checkpoint",
 222                              "enable checkpoint pseudo instructions",
 223                              true);
 224
 225     void
 226     Context::checkParams()
 227     {
 228         doQuiesce = __quiesce;
 229         doStatisticsInsts = __statistics;
 230         doCheckpointInsts = __checkpoint;
 231     }
 232
 233     void debugbreak(ExecContext *xc)
 234     {
 235         debug_break();
 236     }
 237
 238     void switchcpu(ExecContext *xc)
 239     {
 240         if (SampCPU)
 241             SampCPU->switchCPUs();
 242     }
 243 }