/*
* Copyright (c) 2014 ARM Limited
* All rights reserved
*
* The license below extends only to copyright in the software and shall
* not be construed as granting a license to any other intellectual
* property including but not limited to intellectual property relating
* to a hardware implementation of the functionality of the software
* licensed hereunder. You may use the software subject to the license
* terms below provided that you ensure that this notice is replicated
* unmodified and in its entirety in all distributions of the software,
* modified or unmodified, in source code or in binary form.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met: redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer;
* redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution;
* neither the name of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* Authors: Andrew Bardsley
*/
/**
* @file
*
* C++-only configuration and instantiation support. This allows a
* config to be read back from a .ini and instantiated without
* Python. Useful if you want to embed gem5 within a larger system
* without carrying the integration cost of the fully-featured
* configuration system.
*
* This file contains a demonstration main using CxxConfigManager.
* Build with something like:
*
* scons --without-python build/ARM/libgem5_opt.so
*
* g++ -DTRACING_ON -std=c++0x -Ibuild/ARM src/sim/cxx_main.cc \
* -o gem5cxx.opt -Lbuild/ARM -lgem5_opt
*/
#include <cstdlib>
#include <iostream>
#include <sstream>
#include "base/inifile.hh"
#include "base/statistics.hh"
#include "base/str.hh"
#include "base/trace.hh"
#include "cpu/base.hh"
#include "sim/cxx_config_ini.hh"
#include "sim/cxx_manager.hh"
#include "sim/init_signals.hh"
#include "sim/serialize.hh"
#include "sim/sim_events.hh"
#include "sim/simulate.hh"
#include "sim/stat_control.hh"
#include "sim/system.hh"
#include "stats.hh"
void
usage(const std::string &prog_name)
{
std::cerr << "Usage: " << prog_name << (
" <config-file.ini> [ <option> ]\n\n"
"OPTIONS:\n"
" -p <object> <param> <value> -- set a parameter\n"
" -v <object> <param> <values> -- set a vector parameter from"
" a comma\n"
" separated values string\n"
" -d <flag> -- set a debug flag (-<flag>\n"
" clear a flag)\n"
" -s <dir> <ticks> -- save checkpoint to dir after"
" the given\n"
" number of ticks\n"
" -r <dir> -- restore checkpoint from dir\n"
" -c <from> <to> <ticks> -- switch from cpu 'from' to cpu"
" 'to' after\n"
" the given number of ticks\n"
"\n"
);
std::exit(EXIT_FAILURE);
}
int
main(int argc, char **argv)
{
std::string prog_name(argv[0]);
unsigned int arg_ptr = 1;
if (argc == 1)
usage(prog_name);
cxxConfigInit();
initSignals();
setClockFrequency(1000000000000);
curEventQueue(getEventQueue(0));
Stats::initSimStats();
Stats::registerHandlers(CxxConfig::statsReset, CxxConfig::statsDump);
Trace::enable();
setDebugFlag("Terminal");
// setDebugFlag("CxxConfig");
const std::string config_file(argv[arg_ptr]);
CxxConfigFileBase *conf = new CxxIniFile();
if (!conf->load(config_file.c_str())) {
std::cerr << "Can't open config file: " << config_file << '\n';
return EXIT_FAILURE;
}
arg_ptr++;
CxxConfigManager *config_manager = new CxxConfigManager(*conf);
bool checkpoint_restore = false;
bool checkpoint_save = false;
bool switch_cpus = false;
std::string checkpoint_dir = "";
std::string from_cpu = "";
std::string to_cpu = "";
Tick pre_run_time = 1000000;
Tick pre_switch_time = 1000000;
try {
while (arg_ptr < argc) {
std::string option(argv[arg_ptr]);
arg_ptr++;
unsigned num_args = argc - arg_ptr;
if (option == "-p") {
if (num_args < 3)
usage(prog_name);
config_manager->setParam(argv[arg_ptr], argv[arg_ptr + 1],
argv[arg_ptr + 2]);
arg_ptr += 3;
} else if (option == "-v") {
std::vector<std::string> values;
if (num_args < 3)
usage(prog_name);
tokenize(values, argv[arg_ptr + 2], ',');
config_manager->setParamVector(argv[arg_ptr],
argv[arg_ptr + 1], values);
arg_ptr += 3;
} else if (option == "-d") {
if (num_args < 1)
usage(prog_name);
if (argv[arg_ptr][0] == '-')
clearDebugFlag(argv[arg_ptr] + 1);
else
setDebugFlag(argv[arg_ptr]);
arg_ptr++;
} else if (option == "-r") {
if (num_args < 1)
usage(prog_name);
checkpoint_dir = argv[arg_ptr];
checkpoint_restore = true;
arg_ptr++;
} else if (option == "-s") {
if (num_args < 2)
usage(prog_name);
checkpoint_dir = argv[arg_ptr];
std::istringstream(argv[arg_ptr + 1]) >> pre_run_time;
checkpoint_save = true;
arg_ptr += 2;
} else if (option == "-c") {
if (num_args < 3)
usage(prog_name);
switch_cpus = true;
from_cpu = argv[arg_ptr];
to_cpu = argv[arg_ptr + 1];
std::istringstream(argv[arg_ptr + 2]) >> pre_switch_time;
arg_ptr += 3;
} else {
usage(prog_name);
}
}
} catch (CxxConfigManager::Exception &e) {
std::cerr << e.name << ": " << e.message << "\n";
return EXIT_FAILURE;
}
if (checkpoint_save && checkpoint_restore) {
std::cerr << "Don't try and save and restore a checkpoint in the"
" same run\n";
return EXIT_FAILURE;
}
CxxConfig::statsEnable();
getEventQueue(0)->dump();
try {
config_manager->instantiate();
if (!checkpoint_restore) {
config_manager->initState();
config_manager->startup();
}
} catch (CxxConfigManager::Exception &e) {
std::cerr << "Config problem in sim object " << e.name
<< ": " << e.message << "\n";
return EXIT_FAILURE;
}
GlobalSimLoopExitEvent *exit_event = NULL;
if (checkpoint_save) {
exit_event = simulate(pre_run_time);
unsigned int drain_count = 1;
do {
drain_count = config_manager->drain();
std::cerr << "Draining " << drain_count << '\n';
if (drain_count > 0) {
exit_event = simulate();
}
} while (drain_count > 0);
std::cerr << "Simulation stop at tick " << curTick()
<< ", cause: " << exit_event->getCause() << '\n';
std::cerr << "Checkpointing\n";
/* FIXME, this should really be serialising just for
* config_manager rather than using serializeAll's ugly
* SimObject static object list */
Serializable::serializeAll(checkpoint_dir);
std::cerr << "Completed checkpoint\n";
config_manager->drainResume();
}
if (checkpoint_restore) {
std::cerr << "Restoring checkpoint\n";
CheckpointIn *checkpoint = new CheckpointIn(checkpoint_dir,
config_manager->getSimObjectResolver());
DrainManager::instance().preCheckpointRestore();
Serializable::unserializeGlobals(*checkpoint);
config_manager->loadState(*checkpoint);
config_manager->startup();
config_manager->drainResume();
std::cerr << "Restored from checkpoint\n";
}
if (switch_cpus) {
exit_event = simulate(pre_switch_time);
std::cerr << "Switching CPU\n";
/* Assume the system is called system */
System &system = config_manager->getObject<System>("system");
BaseCPU &old_cpu = config_manager->getObject<BaseCPU>(from_cpu);
BaseCPU &new_cpu = config_manager->getObject<BaseCPU>(to_cpu);
unsigned int drain_count = 1;
do {
drain_count = config_manager->drain();
std::cerr << "Draining " << drain_count << '\n';
if (drain_count > 0) {
exit_event = simulate();
}
} while (drain_count > 0);
old_cpu.switchOut();
system.setMemoryMode(Enums::timing);
new_cpu.takeOverFrom(&old_cpu);
config_manager->drainResume();
std::cerr << "Switched CPU\n";
}
exit_event = simulate();
std::cerr << "Exit at tick " << curTick()
<< ", cause: " << exit_event->getCause() << '\n';
getEventQueue(0)->dump();
#if TRY_CLEAN_DELETE
config_manager->deleteObjects();
#endif
delete config_manager;
return EXIT_SUCCESS;
}