1/* 2 * Copyright 2018 Google, Inc. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are 6 * met: redistributions of source code must retain the above copyright 7 * notice, this list of conditions and the following disclaimer; 8 * redistributions in binary form must reproduce the above copyright 9 * notice, this list of conditions and the following disclaimer in the 10 * documentation and/or other materials provided with the distribution; 11 * neither the name of the copyright holders nor the names of its 12 * contributors may be used to endorse or promote products derived from 13 * this software without specific prior written permission. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 16 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 17 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 18 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 19 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 20 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 21 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 25 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 * 27 * Authors: Gabe Black 28 */ 29 30#include <cstring> 31 32#include "base/fiber.hh" 33#include "base/logging.hh" 34#include "base/types.hh" 35#include "python/pybind11/pybind.hh"
|
36#include "sim/core.hh" |
37#include "sim/eventq.hh" 38#include "sim/init.hh"
|
39#include "systemc/core/scheduler.hh" |
40#include "systemc/ext/core/sc_main.hh" 41#include "systemc/ext/utils/sc_report_handler.hh" 42 43// A weak symbol to detect if sc_main has been defined, and if so where it is. 44[[gnu::weak]] int sc_main(int argc, char *argv[]); 45 46namespace sc_core 47{ 48 49namespace 50{ 51 52bool scMainCalled = false; 53 54int _argc = 0; 55char **_argv = NULL; 56 57class ScMainFiber : public Fiber 58{ 59 void 60 main() 61 { 62 if (::sc_main) { 63 ::sc_main(_argc, _argv); 64 } else { 65 // If python tries to call sc_main but no sc_main was defined... 66 fatal("sc_main called but not defined.\n"); 67 } 68 } 69}; 70 71ScMainFiber scMainFiber; 72 73// This wrapper adapts the python version of sc_main to the c++ version. 74void 75sc_main(pybind11::args args) 76{ 77 panic_if(scMainCalled, "sc_main called more than once."); 78 79 _argc = args.size(); 80 _argv = new char *[_argc]; 81 82 // Initialize all the _argvs to NULL so we can delete [] them 83 // unconditionally. 84 for (int idx = 0; idx < _argc; idx++) 85 _argv[idx] = NULL; 86 87 // Attempt to convert all the arguments to strings. If that fails, clean 88 // up after ourselves. Also don't count this as a call to sc_main since 89 // we never got to the c++ version of that function. 90 try { 91 for (int idx = 0; idx < _argc; idx++) { 92 std::string arg = args[idx].cast<std::string>(); 93 _argv[idx] = new char[arg.length() + 1]; 94 strcpy(_argv[idx], arg.c_str()); 95 } 96 } catch (...) { 97 // If that didn't work for some reason (probably a conversion error) 98 // blow away _argv and _argc and pass on the exception. 99 for (int idx = 0; idx < _argc; idx++) 100 delete [] _argv[idx]; 101 delete [] _argv; 102 _argc = 0; 103 throw; 104 } 105 106 // At this point we're going to call the c++ sc_main, so we can't try 107 // again later. 108 scMainCalled = true; 109 110 scMainFiber.run(); 111} 112 113// Make our sc_main wrapper available in the internal _m5 python module under 114// the systemc submodule. 115void 116systemc_pybind(pybind11::module &m_internal) 117{ 118 pybind11::module m = m_internal.def_submodule("systemc"); 119 m.def("sc_main", &sc_main); 120} 121EmbeddedPyBind embed_("systemc", &systemc_pybind); 122 123sc_stop_mode _stop_mode = SC_STOP_FINISH_DELTA; 124sc_status _status = SC_ELABORATION; 125 126Tick _max_tick = MaxTick; 127sc_starvation_policy _starvation = SC_EXIT_ON_STARVATION; 128
|
127uint64_t _deltaCycles = 0;
128
|
129} // anonymous namespace 130 131int 132sc_argc() 133{ 134 return _argc; 135} 136 137const char *const * 138sc_argv() 139{ 140 return _argv; 141} 142 143void 144sc_start() 145{ 146 _max_tick = MaxTick; 147 _starvation = SC_EXIT_ON_STARVATION; 148 149 // Switch back gem5. 150 Fiber::primaryFiber()->run(); 151} 152 153void 154sc_pause() 155{ 156 warn("%s not implemented.\n", __PRETTY_FUNCTION__); 157} 158 159void 160sc_start(const sc_time &time, sc_starvation_policy p) 161{ 162 Tick now = curEventQueue() ? curEventQueue()->getCurTick() : 0; 163 _max_tick = now + time.value(); 164 _starvation = p; 165 166 // Switch back to gem5. 167 Fiber::primaryFiber()->run(); 168} 169 170void 171sc_set_stop_mode(sc_stop_mode mode) 172{ 173 if (sc_is_running()) { 174 SC_REPORT_ERROR("attempt to set sc_stop mode " 175 "after start will be ignored", ""); 176 return; 177 } 178 _stop_mode = mode; 179} 180 181sc_stop_mode 182sc_get_stop_mode() 183{ 184 return _stop_mode; 185} 186 187void 188sc_stop() 189{ 190 warn("%s not implemented.\n", __PRETTY_FUNCTION__); 191} 192 193const sc_time & 194sc_time_stamp() 195{
|
196 warn("%s not implemented.\n", __PRETTY_FUNCTION__);
197 return *(sc_time *)nullptr;
|
196 static sc_time tstamp; 197 Tick tick = sc_gem5::scheduler.eventQueue().getCurTick(); 198 //XXX We're assuming the systemc time resolution is in ps. 199 tstamp = sc_time::from_value(tick / SimClock::Int::ps); 200 return tstamp; |
201} 202 203sc_dt::uint64 204sc_delta_count() 205{
|
203 return _deltaCycles;
|
206 return sc_gem5::scheduler.numCycles(); |
207} 208 209bool 210sc_is_running() 211{ 212 return _status & (SC_RUNNING | SC_PAUSED); 213} 214 215bool 216sc_pending_activity_at_current_time() 217{ 218 warn("%s not implemented.\n", __PRETTY_FUNCTION__); 219 return false; 220} 221 222bool 223sc_pending_activity_at_future_time() 224{ 225 warn("%s not implemented.\n", __PRETTY_FUNCTION__); 226 return false; 227} 228 229bool 230sc_pending_activity() 231{ 232 return sc_pending_activity_at_current_time() || 233 sc_pending_activity_at_future_time(); 234} 235 236sc_time 237sc_time_to_pending_activity() 238{ 239 warn("%s not implemented.\n", __PRETTY_FUNCTION__); 240 return sc_time(); 241} 242 243sc_status 244sc_get_status() 245{ 246 return _status; 247} 248 249} // namespace sc_core
|