02881a7bf3
The DTRACE() macro tests both Trace::enabled and the specific flag. This change uses the same administrative interface for enabling/disabling tracing, but masks the SimpleFlags settings directly. This eliminates a load for every DTRACE() test, e.g. DPRINTF.
382 lines
12 KiB
C++
382 lines
12 KiB
C++
/*
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* Copyright (c) 2014 ARM Limited
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* All rights reserved
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*
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* The license below extends only to copyright in the software and shall
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* not be construed as granting a license to any other intellectual
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* property including but not limited to intellectual property relating
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* to a hardware implementation of the functionality of the software
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* licensed hereunder. You may use the software subject to the license
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* terms below provided that you ensure that this notice is replicated
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* unmodified and in its entirety in all distributions of the software,
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* modified or unmodified, in source code or in binary form.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met: redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer;
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* redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution;
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* neither the name of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* Authors: Andrew Bardsley
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*/
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/**
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* @file
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*
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* Example top level file for SystemC integration with C++-only
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* instantiation.
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*
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* Build with something like:
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*
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* scons --without-python build/ARM/libgem5_opt.so
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*
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* g++ -std=c++0x -Ibuild/ARM -Isrc -DTRACING_ON \
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* -o gem5cxx.opt -Lbuild/ARM -lgem5_opt \
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* src/sim/sc_main_cxx.cc src/sim/cxx_stats.cc \
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* src/sim/sc_module.cc src/sim/sc_logger.cc
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*/
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#include <cstdlib>
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#include <iostream>
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#include <sstream>
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#include <systemc>
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#include "base/statistics.hh"
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#include "base/str.hh"
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#include "base/trace.hh"
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#include "cpu/base.hh"
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#include "sim/cxx_config_ini.hh"
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#include "sim/cxx_manager.hh"
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#include "sim/init_signals.hh"
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#include "sim/serialize.hh"
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#include "sim/simulate.hh"
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#include "sim/stat_control.hh"
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#include "sim/system.hh"
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#include "sc_logger.hh"
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#include "sc_module.hh"
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#include "stats.hh"
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void
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usage(const std::string &prog_name)
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{
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std::cerr << "Usage: " << prog_name << (
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" <config_file.ini> [ <option> ]\n\n"
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"OPTIONS:\n"
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" -p <object> <param> <value> -- set a parameter\n"
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" -v <object> <param> <values> -- set a vector parameter from"
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" a comma\n"
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" separated values string\n"
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" -d <flag> -- set a debug flag (-<flag>\n"
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" clear a flag)\n"
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" -s <dir> <ticks> -- save checkpoint to dir after"
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" the given\n"
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" number of ticks\n"
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" -r <dir> -- restore checkpoint to dir\n"
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" -c <from> <to> <ticks> -- switch from cpu 'from' to cpu"
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" 'to' after\n"
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" the given number of ticks\n"
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"\n"
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);
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std::exit(EXIT_FAILURE);
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}
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class SimControl : public Gem5SystemC::Module
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{
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protected:
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int argc;
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char **argv;
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CxxConfigManager *config_manager;
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Gem5SystemC::Logger logger;
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bool checkpoint_restore;
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bool checkpoint_save;
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bool switch_cpus;
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std::string checkpoint_dir;
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std::string from_cpu;
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std::string to_cpu;
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Tick pre_run_time;
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Tick pre_switch_time;
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public:
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SC_HAS_PROCESS(SimControl);
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SimControl(sc_core::sc_module_name name, int argc_, char **argv_);
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void run();
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};
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SimControl::SimControl(sc_core::sc_module_name name,
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int argc_, char **argv_) :
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Gem5SystemC::Module(name),
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argc(argc_),
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argv(argv_)
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{
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SC_THREAD(run);
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std::string prog_name(argv[0]);
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unsigned int arg_ptr = 1;
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if (argc == 1)
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usage(prog_name);
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cxxConfigInit();
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/* Pass DPRINTF messages to SystemC */
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Trace::setDebugLogger(&logger);
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/* @todo need this as an option */
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Gem5SystemC::setTickFrequency();
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/* Make a SystemC-synchronising event queue and install it as the
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* sole top level gem5 EventQueue */
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Gem5SystemC::Module::setupEventQueues(*this);
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if (sc_core::sc_get_time_resolution() !=
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sc_core::sc_time(1, sc_core::SC_PS))
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{
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fatal("Time resolution must be set to 1 ps for gem5 to work");
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}
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/* Enable keyboard interrupt, async I/O etc. */
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initSignals();
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/* Enable stats */
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Stats::initSimStats();
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Stats::registerHandlers(CxxConfig::statsReset, CxxConfig::statsDump);
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Trace::enable();
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setDebugFlag("Terminal");
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checkpoint_restore = false;
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checkpoint_save = false;
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switch_cpus = false;
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checkpoint_dir = "";
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from_cpu = "";
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to_cpu = "";
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pre_run_time = 1000000;
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pre_switch_time = 1000000;
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const std::string config_file(argv[arg_ptr]);
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CxxConfigFileBase *conf = new CxxIniFile();
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if (!conf->load(config_file.c_str()))
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fatal("Can't open config file: %s", config_file);
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arg_ptr++;
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config_manager = new CxxConfigManager(*conf);
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try {
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while (arg_ptr < argc) {
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std::string option(argv[arg_ptr]);
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arg_ptr++;
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unsigned num_args = argc - arg_ptr;
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if (option == "-p") {
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if (num_args < 3)
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usage(prog_name);
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config_manager->setParam(argv[arg_ptr], argv[arg_ptr + 1],
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argv[arg_ptr + 2]);
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arg_ptr += 3;
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} else if (option == "-v") {
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std::vector<std::string> values;
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if (num_args < 3)
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usage(prog_name);
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tokenize(values, argv[2], ',');
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config_manager->setParamVector(argv[arg_ptr],
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argv[arg_ptr], values);
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arg_ptr += 3;
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} else if (option == "-d") {
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if (num_args < 1)
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usage(prog_name);
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if (argv[arg_ptr][0] == '-')
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clearDebugFlag(argv[arg_ptr] + 1);
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else
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setDebugFlag(argv[arg_ptr]);
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arg_ptr++;
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} else if (option == "-r") {
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if (num_args < 1)
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usage(prog_name);
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checkpoint_dir = argv[arg_ptr];
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checkpoint_restore = true;
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arg_ptr++;
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} else if (option == "-s") {
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if (num_args < 2)
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usage(prog_name);
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checkpoint_dir = argv[arg_ptr];
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std::istringstream(argv[arg_ptr + 1]) >> pre_run_time;
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checkpoint_save = true;
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arg_ptr += 2;
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} else if (option == "-c") {
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if (num_args < 3)
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usage(prog_name);
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switch_cpus = true;
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from_cpu = argv[arg_ptr];
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to_cpu = argv[arg_ptr + 1];
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std::istringstream(argv[arg_ptr + 2]) >> pre_switch_time;
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arg_ptr += 3;
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} else {
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usage(prog_name);
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}
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}
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} catch (CxxConfigManager::Exception &e) {
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fatal("Config problem in sim object %s: %s", e.name, e.message);
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}
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CxxConfig::statsEnable();
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getEventQueue(0)->dump();
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try {
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config_manager->instantiate();
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} catch (CxxConfigManager::Exception &e) {
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fatal("Config problem in sim object %s: %s", e.name, e.message);
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}
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}
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void SimControl::run()
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{
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EventQueue *eventq = getEventQueue(0);
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GlobalSimLoopExitEvent *exit_event = NULL;
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/* There *must* be no scheduled events yet */
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fatal_if(!eventq->empty(), "There must be no posted events"
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" before SimControl::run");
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try {
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if (checkpoint_restore) {
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std::cerr << "Restoring checkpoint\n";
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Checkpoint *checkpoint = new Checkpoint(checkpoint_dir,
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config_manager->getSimObjectResolver());
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/* Catch SystemC up with gem5 after checkpoint restore.
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* Note that gem5 leading SystemC is always a violation of the
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* required relationship between the two, hence this careful
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* catchup */
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Tick systemc_time = sc_core::sc_time_stamp().value();
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if (curTick() > systemc_time) {
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Tick wait_period = curTick() - systemc_time;
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std::cerr << "Waiting for " << wait_period << "ps for"
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" SystemC to catch up to gem5\n";
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wait(sc_core::sc_time(wait_period, sc_core::SC_PS));
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}
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config_manager->loadState(checkpoint);
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config_manager->startup();
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config_manager->drainResume();
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} else {
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config_manager->initState();
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config_manager->startup();
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}
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} catch (CxxConfigManager::Exception &e) {
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fatal("Config problem in sim object %s: %s", e.name, e.message);
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}
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fatal_if(eventq->empty(), "No events to process after system startup");
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if (checkpoint_save) {
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exit_event = simulate(pre_run_time);
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DrainManager drain_manager;
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unsigned int drain_count = 1;
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do {
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drain_count = config_manager->drain(&drain_manager);
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std::cerr << "Draining " << drain_count << '\n';
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if (drain_count > 0) {
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drain_manager.setCount(drain_count);
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exit_event = simulate();
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}
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} while (drain_count > 0);
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std::cerr << "Simulation stop at tick " << curTick()
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<< ", cause: " << exit_event->getCause() << '\n';
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std::cerr << "Checkpointing\n";
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/* FIXME, this should really be serialising just for
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* config_manager rather than using serializeAll's ugly
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* SimObject static object list */
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Serializable::serializeAll(checkpoint_dir);
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std::cerr << "Completed checkpoint\n";
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config_manager->drainResume();
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}
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if (switch_cpus) {
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exit_event = simulate(pre_switch_time);
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std::cerr << "Switching CPU\n";
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/* Assume the system is called system */
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System &system = config_manager->getObject<System>("system");
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BaseCPU &old_cpu = config_manager->getObject<BaseCPU>(from_cpu);
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BaseCPU &new_cpu = config_manager->getObject<BaseCPU>(to_cpu);
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DrainManager drain_manager;
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unsigned int drain_count = 1;
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do {
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drain_count = config_manager->drain(&drain_manager);
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std::cerr << "Draining " << drain_count << '\n';
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if (drain_count > 0) {
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drain_manager.setCount(drain_count);
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exit_event = simulate();
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}
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} while (drain_count > 0);
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old_cpu.switchOut();
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system.setMemoryMode(Enums::timing);
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new_cpu.takeOverFrom(&old_cpu);
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config_manager->drainResume();
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std::cerr << "Switched CPU\n";
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}
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exit_event = simulate();
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std::cerr << "Exit at tick " << curTick()
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<< ", cause: " << exit_event->getCause() << '\n';
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getEventQueue(0)->dump();
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#if TRY_CLEAN_DELETE
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config_manager->deleteObjects();
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#endif
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}
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int
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sc_main(int argc, char **argv)
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{
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SimControl sim_control("gem5", argc, argv);
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sc_core::sc_start();
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return EXIT_SUCCESS;
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}
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