arch/alpha/pseudo_inst.cc

   1 /*
   2  * Copyright (c) 2003-2004 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 <fcntl.h>
  30 #include <unistd.h>
  31 #include <cstdio>
  32
  33 #include <string>
  34
  35 #include "arch/alpha/pseudo_inst.hh"
  36 #include "arch/alpha/vtophys.hh"
  37 #include "cpu/base_cpu.hh"
  38 #include "cpu/exec_context.hh"
  39 #include "sim/param.hh"
  40 #include "sim/serialize.hh"
  41 #include "sim/sim_exit.hh"
  42 #include "sim/stat_control.hh"
  43 #include "sim/stats.hh"
  44 #include "sim/system.hh"
  45
  46 using namespace std;
  47 using namespace Stats;
  48
  49 namespace AlphaPseudo
  50 {
  51     bool doStatisticsInsts;
  52     bool doCheckpointInsts;
  53     bool doQuiesce;
  54
  55     void
  56     arm(ExecContext *xc)
  57     {
  58         xc->kernelStats.arm();
  59     }
  60
  61     void
  62     quiesce(ExecContext *xc)
  63     {
  64         if (!doQuiesce)
  65             return;
  66
  67         xc->suspend();
  68         xc->kernelStats.quiesce();
  69     }
  70
  71     void
  72     ivlb(ExecContext *xc)
  73     {
  74         xc->kernelStats.ivlb();
  75     }
  76
  77     void
  78     ivle(ExecContext *xc)
  79     {
  80     }
  81
  82     void
  83     m5exit_old(ExecContext *xc)
  84     {
  85         SimExit(curTick, "m5_exit_old instruction encountered");
  86     }
  87
  88     void
  89     m5exit(ExecContext *xc)
  90     {
  91         Tick delay = xc->regs.intRegFile[16];
  92         Tick when = curTick + NS2Ticks(delay);
  93         SimExit(when, "m5_exit instruction encountered");
  94     }
  95
  96     void
  97     resetstats(ExecContext *xc)
  98     {
  99         if (!doStatisticsInsts)
 100             return;
 101
 102         Tick delay = xc->regs.intRegFile[16];
 103         Tick period = xc->regs.intRegFile[17];
 104
 105         Tick when = curTick + NS2Ticks(delay);
 106         Tick repeat = NS2Ticks(period);
 107
 108         using namespace Stats;
 109         SetupEvent(Reset, when, repeat);
 110     }
 111
 112     void
 113     dumpstats(ExecContext *xc)
 114     {
 115         if (!doStatisticsInsts)
 116             return;
 117
 118         Tick delay = xc->regs.intRegFile[16];
 119         Tick period = xc->regs.intRegFile[17];
 120
 121         Tick when = curTick + NS2Ticks(delay);
 122         Tick repeat = NS2Ticks(period);
 123
 124         using namespace Stats;
 125         SetupEvent(Dump, when, repeat);
 126     }
 127
 128     void
 129     dumpresetstats(ExecContext *xc)
 130     {
 131         if (!doStatisticsInsts)
 132             return;
 133
 134         Tick delay = xc->regs.intRegFile[16];
 135         Tick period = xc->regs.intRegFile[17];
 136
 137         Tick when = curTick + NS2Ticks(delay);
 138         Tick repeat = NS2Ticks(period);
 139
 140         using namespace Stats;
 141         SetupEvent(Dump|Reset, when, repeat);
 142     }
 143
 144     void
 145     m5checkpoint(ExecContext *xc)
 146     {
 147         if (!doCheckpointInsts)
 148             return;
 149
 150         Tick delay = xc->regs.intRegFile[16];
 151         Tick period = xc->regs.intRegFile[17];
 152
 153         Tick when = curTick + NS2Ticks(delay);
 154         Tick repeat = NS2Ticks(period);
 155
 156         Checkpoint::setup(when, repeat);
 157     }
 158
 159     void
 160     readfile(ExecContext *xc)
 161     {
 162         const string &file = xc->cpu->system->readfile;
 163         if (file.empty()) {
 164             xc->regs.intRegFile[0] = ULL(0);
 165             return;
 166         }
 167
 168         Addr vaddr = xc->regs.intRegFile[16];
 169         uint64_t len = xc->regs.intRegFile[17];
 170         uint64_t offset = xc->regs.intRegFile[18];
 171         uint64_t result = 0;
 172
 173         int fd = ::open(file.c_str(), O_RDONLY, 0);
 174         if (fd < 0)
 175             panic("could not open file %s\n", file);
 176
 177         char *buf = new char[len];
 178         char *p = buf;
 179         while (len > 0) {
 180             int bytes = ::pread(fd, p, len, offset);
 181             if (bytes <= 0)
 182                 break;
 183
 184             p += bytes;
 185             offset += bytes;
 186             result += bytes;
 187             len -= bytes;
 188         }
 189
 190         close(fd);
 191         CopyIn(xc, vaddr, buf, result);
 192         delete [] buf;
 193         xc->regs.intRegFile[0] = result;
 194     }
 195
 196     class Context : public ParamContext
 197     {
 198       public:
 199         Context(const string &section) : ParamContext(section) {}
 200         void checkParams();
 201     };
 202
 203     Context context("PseudoInsts");
 204
 205     Param<bool> __quiesce(&context, "quiesce",
 206                           "enable quiesce instructions",
 207                           true);
 208     Param<bool> __statistics(&context, "statistics",
 209                              "enable statistics pseudo instructions",
 210                              true);
 211     Param<bool> __checkpoint(&context, "checkpoint",
 212                              "enable checkpoint pseudo instructions",
 213                              true);
 214
 215     void
 216     Context::checkParams()
 217     {
 218         doQuiesce = __quiesce;
 219         doStatisticsInsts = __statistics;
 220         doCheckpointInsts = __checkpoint;
 221     }
 222 }