sc_main.cc revision 13182
112837Sgabeblack@google.com/* 212837Sgabeblack@google.com * Copyright 2018 Google, Inc. 312837Sgabeblack@google.com * 412837Sgabeblack@google.com * Redistribution and use in source and binary forms, with or without 512837Sgabeblack@google.com * modification, are permitted provided that the following conditions are 612837Sgabeblack@google.com * met: redistributions of source code must retain the above copyright 712837Sgabeblack@google.com * notice, this list of conditions and the following disclaimer; 812837Sgabeblack@google.com * redistributions in binary form must reproduce the above copyright 912837Sgabeblack@google.com * notice, this list of conditions and the following disclaimer in the 1012837Sgabeblack@google.com * documentation and/or other materials provided with the distribution; 1112837Sgabeblack@google.com * neither the name of the copyright holders nor the names of its 1212837Sgabeblack@google.com * contributors may be used to endorse or promote products derived from 1312837Sgabeblack@google.com * this software without specific prior written permission. 1412837Sgabeblack@google.com * 1512837Sgabeblack@google.com * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 1612837Sgabeblack@google.com * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 1712837Sgabeblack@google.com * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 1812837Sgabeblack@google.com * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 1912837Sgabeblack@google.com * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 2012837Sgabeblack@google.com * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 2112837Sgabeblack@google.com * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 2212837Sgabeblack@google.com * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 2312837Sgabeblack@google.com * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 2412837Sgabeblack@google.com * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 2512837Sgabeblack@google.com * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 2612837Sgabeblack@google.com * 2712837Sgabeblack@google.com * Authors: Gabe Black 2812837Sgabeblack@google.com */ 2912837Sgabeblack@google.com 3012837Sgabeblack@google.com#include <cstring> 3113081Sgabeblack@google.com#include <string> 3212837Sgabeblack@google.com 3312862Sgabeblack@google.com#include "base/fiber.hh" 3412837Sgabeblack@google.com#include "base/logging.hh" 3512862Sgabeblack@google.com#include "base/types.hh" 3612956Sgabeblack@google.com#include "sim/core.hh" 3712862Sgabeblack@google.com#include "sim/eventq.hh" 3812837Sgabeblack@google.com#include "sim/init.hh" 3912982Sgabeblack@google.com#include "systemc/core/kernel.hh" 4013038Sgabeblack@google.com#include "systemc/core/python.hh" 4112956Sgabeblack@google.com#include "systemc/core/scheduler.hh" 4212837Sgabeblack@google.com#include "systemc/ext/core/sc_main.hh" 4312861Sgabeblack@google.com#include "systemc/ext/utils/sc_report_handler.hh" 4412837Sgabeblack@google.com 4512949Sgabeblack@google.com// A weak symbol to detect if sc_main has been defined, and if so where it is. 4612949Sgabeblack@google.com[[gnu::weak]] int sc_main(int argc, char *argv[]); 4712837Sgabeblack@google.com 4812837Sgabeblack@google.comnamespace sc_core 4912837Sgabeblack@google.com{ 5012837Sgabeblack@google.com 5112837Sgabeblack@google.comnamespace 5212837Sgabeblack@google.com{ 5312837Sgabeblack@google.com 5412837Sgabeblack@google.combool scMainCalled = false; 5512837Sgabeblack@google.com 5612837Sgabeblack@google.comint _argc = 0; 5712837Sgabeblack@google.comchar **_argv = NULL; 5812837Sgabeblack@google.com 5912862Sgabeblack@google.comclass ScMainFiber : public Fiber 6012862Sgabeblack@google.com{ 6113081Sgabeblack@google.com public: 6213081Sgabeblack@google.com std::string resultStr; 6313081Sgabeblack@google.com int resultInt; 6413081Sgabeblack@google.com 6513081Sgabeblack@google.com ScMainFiber() : resultInt(1) {} 6613081Sgabeblack@google.com 6712862Sgabeblack@google.com void 6812862Sgabeblack@google.com main() 6912862Sgabeblack@google.com { 7012949Sgabeblack@google.com if (::sc_main) { 7113081Sgabeblack@google.com try { 7213081Sgabeblack@google.com resultInt = ::sc_main(_argc, _argv); 7313081Sgabeblack@google.com if (resultInt) 7413081Sgabeblack@google.com resultStr = "sc_main returned non-zero"; 7513081Sgabeblack@google.com else 7613081Sgabeblack@google.com resultStr = "sc_main finished"; 7713081Sgabeblack@google.com // Make sure no systemc events/notifications are scheduled 7813081Sgabeblack@google.com // after sc_main returns. 7913081Sgabeblack@google.com } catch (const sc_report &r) { 8013081Sgabeblack@google.com // There was an exception nobody caught. 8113081Sgabeblack@google.com resultStr = r.what(); 8213182Sgabeblack@google.com } catch (...) { 8313182Sgabeblack@google.com // There was some other type of exception we need to wrap. 8413182Sgabeblack@google.com const sc_report *r = ::sc_gem5::reportifyException(); 8513182Sgabeblack@google.com resultStr = r->what(); 8613081Sgabeblack@google.com } 8713077Sgabeblack@google.com ::sc_gem5::Kernel::scMainFinished(true); 8813077Sgabeblack@google.com ::sc_gem5::scheduler.clear(); 8912949Sgabeblack@google.com } else { 9012949Sgabeblack@google.com // If python tries to call sc_main but no sc_main was defined... 9112949Sgabeblack@google.com fatal("sc_main called but not defined.\n"); 9212949Sgabeblack@google.com } 9312862Sgabeblack@google.com } 9412862Sgabeblack@google.com}; 9512862Sgabeblack@google.com 9612862Sgabeblack@google.comScMainFiber scMainFiber; 9712862Sgabeblack@google.com 9812837Sgabeblack@google.com// This wrapper adapts the python version of sc_main to the c++ version. 9912837Sgabeblack@google.comvoid 10012837Sgabeblack@google.comsc_main(pybind11::args args) 10112837Sgabeblack@google.com{ 10212837Sgabeblack@google.com panic_if(scMainCalled, "sc_main called more than once."); 10312837Sgabeblack@google.com 10412837Sgabeblack@google.com _argc = args.size(); 10512837Sgabeblack@google.com _argv = new char *[_argc]; 10612837Sgabeblack@google.com 10712837Sgabeblack@google.com // Initialize all the _argvs to NULL so we can delete [] them 10812837Sgabeblack@google.com // unconditionally. 10912837Sgabeblack@google.com for (int idx = 0; idx < _argc; idx++) 11012837Sgabeblack@google.com _argv[idx] = NULL; 11112837Sgabeblack@google.com 11212837Sgabeblack@google.com // Attempt to convert all the arguments to strings. If that fails, clean 11312837Sgabeblack@google.com // up after ourselves. Also don't count this as a call to sc_main since 11412837Sgabeblack@google.com // we never got to the c++ version of that function. 11512837Sgabeblack@google.com try { 11612837Sgabeblack@google.com for (int idx = 0; idx < _argc; idx++) { 11712837Sgabeblack@google.com std::string arg = args[idx].cast<std::string>(); 11812837Sgabeblack@google.com _argv[idx] = new char[arg.length() + 1]; 11912837Sgabeblack@google.com strcpy(_argv[idx], arg.c_str()); 12012837Sgabeblack@google.com } 12112837Sgabeblack@google.com } catch (...) { 12212837Sgabeblack@google.com // If that didn't work for some reason (probably a conversion error) 12312837Sgabeblack@google.com // blow away _argv and _argc and pass on the exception. 12412837Sgabeblack@google.com for (int idx = 0; idx < _argc; idx++) 12512837Sgabeblack@google.com delete [] _argv[idx]; 12612837Sgabeblack@google.com delete [] _argv; 12712837Sgabeblack@google.com _argc = 0; 12812837Sgabeblack@google.com throw; 12912837Sgabeblack@google.com } 13012837Sgabeblack@google.com 13112837Sgabeblack@google.com // At this point we're going to call the c++ sc_main, so we can't try 13212837Sgabeblack@google.com // again later. 13312837Sgabeblack@google.com scMainCalled = true; 13412837Sgabeblack@google.com 13512862Sgabeblack@google.com scMainFiber.run(); 13612837Sgabeblack@google.com} 13712837Sgabeblack@google.com 13813081Sgabeblack@google.comint 13913081Sgabeblack@google.comsc_main_result_code() 14013081Sgabeblack@google.com{ 14113081Sgabeblack@google.com return scMainFiber.resultInt; 14213081Sgabeblack@google.com} 14313081Sgabeblack@google.com 14413081Sgabeblack@google.comstd::string 14513081Sgabeblack@google.comsc_main_result_str() 14613081Sgabeblack@google.com{ 14713081Sgabeblack@google.com return scMainFiber.resultStr; 14813081Sgabeblack@google.com} 14913081Sgabeblack@google.com 15012837Sgabeblack@google.com// Make our sc_main wrapper available in the internal _m5 python module under 15112837Sgabeblack@google.com// the systemc submodule. 15213038Sgabeblack@google.com 15313038Sgabeblack@google.comstruct InstallScMain : public ::sc_gem5::PythonInitFunc 15412837Sgabeblack@google.com{ 15513038Sgabeblack@google.com void 15613038Sgabeblack@google.com run(pybind11::module &systemc) override 15713038Sgabeblack@google.com { 15813038Sgabeblack@google.com systemc.def("sc_main", &sc_main); 15913081Sgabeblack@google.com systemc.def("sc_main_result_code", &sc_main_result_code); 16013081Sgabeblack@google.com systemc.def("sc_main_result_str", &sc_main_result_str); 16113038Sgabeblack@google.com } 16213038Sgabeblack@google.com} installScMain; 16312837Sgabeblack@google.com 16412861Sgabeblack@google.comsc_stop_mode _stop_mode = SC_STOP_FINISH_DELTA; 16512861Sgabeblack@google.com 16612837Sgabeblack@google.com} // anonymous namespace 16712837Sgabeblack@google.com 16812837Sgabeblack@google.comint 16912837Sgabeblack@google.comsc_argc() 17012837Sgabeblack@google.com{ 17112837Sgabeblack@google.com return _argc; 17212837Sgabeblack@google.com} 17312837Sgabeblack@google.com 17412837Sgabeblack@google.comconst char *const * 17512837Sgabeblack@google.comsc_argv() 17612837Sgabeblack@google.com{ 17712837Sgabeblack@google.com return _argv; 17812837Sgabeblack@google.com} 17912837Sgabeblack@google.com 18012860Sgabeblack@google.comvoid 18112860Sgabeblack@google.comsc_start() 18212860Sgabeblack@google.com{ 18312962Sgabeblack@google.com Tick now = ::sc_gem5::scheduler.getCurTick(); 18412961Sgabeblack@google.com sc_start(sc_time::from_value(MaxTick - now), SC_EXIT_ON_STARVATION); 18512860Sgabeblack@google.com} 18612860Sgabeblack@google.com 18712860Sgabeblack@google.comvoid 18812860Sgabeblack@google.comsc_pause() 18912860Sgabeblack@google.com{ 19012990Sgabeblack@google.com if (::sc_gem5::Kernel::status() == SC_RUNNING) 19112961Sgabeblack@google.com ::sc_gem5::scheduler.schedulePause(); 19212860Sgabeblack@google.com} 19312860Sgabeblack@google.com 19412860Sgabeblack@google.comvoid 19512860Sgabeblack@google.comsc_start(const sc_time &time, sc_starvation_policy p) 19612860Sgabeblack@google.com{ 19713061Sgabeblack@google.com if (time.value() == 0) { 19813061Sgabeblack@google.com ::sc_gem5::scheduler.oneCycle(); 19913061Sgabeblack@google.com } else { 20013061Sgabeblack@google.com Tick now = ::sc_gem5::scheduler.getCurTick(); 20113084Sgabeblack@google.com if (MaxTick - now < time.value()) { 20213084Sgabeblack@google.com SC_REPORT_ERROR("(E544) simulation time value overflow, " 20313084Sgabeblack@google.com "simulation aborted", ""); 20413084Sgabeblack@google.com } 20513061Sgabeblack@google.com ::sc_gem5::scheduler.start(now + time.value(), p == SC_RUN_TO_TIME); 20613061Sgabeblack@google.com } 20712860Sgabeblack@google.com} 20812860Sgabeblack@google.com 20912860Sgabeblack@google.comvoid 21012860Sgabeblack@google.comsc_set_stop_mode(sc_stop_mode mode) 21112860Sgabeblack@google.com{ 21212861Sgabeblack@google.com if (sc_is_running()) { 21312861Sgabeblack@google.com SC_REPORT_ERROR("attempt to set sc_stop mode " 21412861Sgabeblack@google.com "after start will be ignored", ""); 21512861Sgabeblack@google.com return; 21612861Sgabeblack@google.com } 21712861Sgabeblack@google.com _stop_mode = mode; 21812860Sgabeblack@google.com} 21912860Sgabeblack@google.com 22012860Sgabeblack@google.comsc_stop_mode 22112860Sgabeblack@google.comsc_get_stop_mode() 22212860Sgabeblack@google.com{ 22312861Sgabeblack@google.com return _stop_mode; 22412860Sgabeblack@google.com} 22512860Sgabeblack@google.com 22612860Sgabeblack@google.comvoid 22712860Sgabeblack@google.comsc_stop() 22812860Sgabeblack@google.com{ 22912990Sgabeblack@google.com if (::sc_gem5::Kernel::status() == SC_STOPPED) 23012961Sgabeblack@google.com return; 23112961Sgabeblack@google.com 23213097Sgabeblack@google.com if ((sc_get_status() & SC_RUNNING)) { 23312961Sgabeblack@google.com bool finish_delta = (_stop_mode == SC_STOP_FINISH_DELTA); 23412961Sgabeblack@google.com ::sc_gem5::scheduler.scheduleStop(finish_delta); 23512961Sgabeblack@google.com } else { 23612990Sgabeblack@google.com ::sc_gem5::Kernel::stop(); 23712961Sgabeblack@google.com } 23812860Sgabeblack@google.com} 23912860Sgabeblack@google.com 24012860Sgabeblack@google.comconst sc_time & 24112860Sgabeblack@google.comsc_time_stamp() 24212860Sgabeblack@google.com{ 24312956Sgabeblack@google.com static sc_time tstamp; 24412962Sgabeblack@google.com Tick tick = ::sc_gem5::scheduler.getCurTick(); 24512956Sgabeblack@google.com //XXX We're assuming the systemc time resolution is in ps. 24613083Sgabeblack@google.com // If tick is zero, the time scale may not be fixed yet, and 24713083Sgabeblack@google.com // SimClock::Int::ps may be zero. 24813083Sgabeblack@google.com tstamp = sc_time::from_value(tick ? tick / SimClock::Int::ps : 0); 24912956Sgabeblack@google.com return tstamp; 25012860Sgabeblack@google.com} 25112860Sgabeblack@google.com 25212860Sgabeblack@google.comsc_dt::uint64 25312860Sgabeblack@google.comsc_delta_count() 25412860Sgabeblack@google.com{ 25512956Sgabeblack@google.com return sc_gem5::scheduler.numCycles(); 25612860Sgabeblack@google.com} 25712860Sgabeblack@google.com 25812860Sgabeblack@google.combool 25912860Sgabeblack@google.comsc_is_running() 26012860Sgabeblack@google.com{ 26112982Sgabeblack@google.com return sc_get_status() & (SC_RUNNING | SC_PAUSED); 26212860Sgabeblack@google.com} 26312860Sgabeblack@google.com 26412860Sgabeblack@google.combool 26512860Sgabeblack@google.comsc_pending_activity_at_current_time() 26612860Sgabeblack@google.com{ 26712962Sgabeblack@google.com return ::sc_gem5::scheduler.pendingCurr(); 26812860Sgabeblack@google.com} 26912860Sgabeblack@google.com 27012860Sgabeblack@google.combool 27112860Sgabeblack@google.comsc_pending_activity_at_future_time() 27212860Sgabeblack@google.com{ 27312962Sgabeblack@google.com return ::sc_gem5::scheduler.pendingFuture(); 27412860Sgabeblack@google.com} 27512860Sgabeblack@google.com 27612860Sgabeblack@google.combool 27712860Sgabeblack@google.comsc_pending_activity() 27812860Sgabeblack@google.com{ 27912861Sgabeblack@google.com return sc_pending_activity_at_current_time() || 28012861Sgabeblack@google.com sc_pending_activity_at_future_time(); 28112860Sgabeblack@google.com} 28212860Sgabeblack@google.com 28312860Sgabeblack@google.comsc_time 28412860Sgabeblack@google.comsc_time_to_pending_activity() 28512860Sgabeblack@google.com{ 28612962Sgabeblack@google.com return sc_time::from_value(::sc_gem5::scheduler.timeToPending()); 28712860Sgabeblack@google.com} 28812860Sgabeblack@google.com 28912860Sgabeblack@google.comsc_status 29012860Sgabeblack@google.comsc_get_status() 29112860Sgabeblack@google.com{ 29212982Sgabeblack@google.com return ::sc_gem5::kernel ? ::sc_gem5::kernel->status() : SC_ELABORATION; 29312860Sgabeblack@google.com} 29412860Sgabeblack@google.com 29513043Sgabeblack@google.comstd::ostream & 29613043Sgabeblack@google.comoperator << (std::ostream &os, sc_status s) 29713043Sgabeblack@google.com{ 29813043Sgabeblack@google.com switch (s) { 29913043Sgabeblack@google.com case SC_ELABORATION: 30013043Sgabeblack@google.com os << "SC_ELABORATION"; 30113043Sgabeblack@google.com break; 30213043Sgabeblack@google.com case SC_BEFORE_END_OF_ELABORATION: 30313043Sgabeblack@google.com os << "SC_BEFORE_END_OF_ELABORATION"; 30413043Sgabeblack@google.com break; 30513043Sgabeblack@google.com case SC_END_OF_ELABORATION: 30613043Sgabeblack@google.com os << "SC_END_OF_ELABORATION"; 30713043Sgabeblack@google.com break; 30813043Sgabeblack@google.com case SC_START_OF_SIMULATION: 30913043Sgabeblack@google.com os << "SC_START_OF_SIMULATION"; 31013043Sgabeblack@google.com break; 31113043Sgabeblack@google.com case SC_RUNNING: 31213043Sgabeblack@google.com os << "SC_RUNNING"; 31313043Sgabeblack@google.com break; 31413043Sgabeblack@google.com case SC_PAUSED: 31513043Sgabeblack@google.com os << "SC_PAUSED"; 31613043Sgabeblack@google.com break; 31713043Sgabeblack@google.com case SC_STOPPED: 31813043Sgabeblack@google.com os << "SC_STOPPED"; 31913043Sgabeblack@google.com break; 32013043Sgabeblack@google.com case SC_END_OF_SIMULATION: 32113043Sgabeblack@google.com os << "SC_END_OF_SIMULATION"; 32213043Sgabeblack@google.com break; 32313043Sgabeblack@google.com 32413043Sgabeblack@google.com // Nonstandard 32513043Sgabeblack@google.com case SC_END_OF_INITIALIZATION: 32613043Sgabeblack@google.com os << "SC_END_OF_INITIALIZATION"; 32713043Sgabeblack@google.com break; 32813043Sgabeblack@google.com case SC_END_OF_UPDATE: 32913043Sgabeblack@google.com os << "SC_END_OF_UPDATE"; 33013043Sgabeblack@google.com break; 33113043Sgabeblack@google.com case SC_BEFORE_TIMESTEP: 33213043Sgabeblack@google.com os << "SC_BEFORE_TIMESTEP"; 33313043Sgabeblack@google.com break; 33413043Sgabeblack@google.com 33513043Sgabeblack@google.com default: 33613043Sgabeblack@google.com if (s & SC_STATUS_ANY) { 33713043Sgabeblack@google.com const char *prefix = "("; 33813043Sgabeblack@google.com for (sc_status m = (sc_status)0x1; 33913043Sgabeblack@google.com m < SC_STATUS_ANY; m = (sc_status)(m << 1)) { 34013043Sgabeblack@google.com if (m & s) { 34113043Sgabeblack@google.com os << prefix; 34213043Sgabeblack@google.com prefix = "|"; 34313043Sgabeblack@google.com os << m; 34413043Sgabeblack@google.com } 34513043Sgabeblack@google.com } 34613043Sgabeblack@google.com os << ")"; 34713043Sgabeblack@google.com } else { 34813043Sgabeblack@google.com ccprintf(os, "%#x", s); 34913043Sgabeblack@google.com } 35013043Sgabeblack@google.com } 35113043Sgabeblack@google.com 35213043Sgabeblack@google.com return os; 35313043Sgabeblack@google.com} 35413043Sgabeblack@google.com 35512837Sgabeblack@google.com} // namespace sc_core 356