kernel.cc revision 13207
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 "systemc/core/kernel.hh" 31 32#include "base/logging.hh" 33#include "systemc/core/channel.hh" 34#include "systemc/core/module.hh" 35#include "systemc/core/port.hh" 36#include "systemc/core/scheduler.hh" 37 38namespace sc_gem5 39{ 40 41namespace 42{ 43 44bool scMainDone = false; 45bool stopAfterCallbacks = false; 46bool startComplete = false; 47bool endComplete = false; 48 49sc_core::sc_status _status = sc_core::SC_ELABORATION; 50 51} // anonymous namespace 52 53bool Kernel::startOfSimulationComplete() { return startComplete; } 54bool Kernel::endOfSimulationComplete() { return endComplete; } 55 56bool Kernel::scMainFinished() { return scMainDone; } 57void Kernel::scMainFinished(bool finished) { scMainDone = finished; } 58 59sc_core::sc_status Kernel::status() { return _status; } 60void Kernel::status(sc_core::sc_status s) { _status = s; } 61 62Kernel::Kernel(Params *params) : 63 SimObject(params), t0Event(this, false, EventBase::Default_Pri - 1) 64{ 65 // Install ourselves as the scheduler's event manager. 66 ::sc_gem5::scheduler.setEventQueue(eventQueue()); 67} 68 69void 70Kernel::init() 71{ 72 if (scMainDone) 73 return; 74 75 if (stopAfterCallbacks) 76 fatal("Simulation called sc_stop during elaboration.\n"); 77 78 status(::sc_core::SC_BEFORE_END_OF_ELABORATION); 79 for (auto p: allPorts) 80 p->sc_port_base()->before_end_of_elaboration(); 81 for (auto m: sc_gem5::allModules) 82 m->beforeEndOfElaboration(); 83 for (auto c: sc_gem5::allChannels) 84 c->sc_chan()->before_end_of_elaboration(); 85} 86 87void 88Kernel::regStats() 89{ 90 if (scMainDone || stopAfterCallbacks) 91 return; 92 93 try { 94 for (auto p: allPorts) 95 p->finalize(); 96 97 status(::sc_core::SC_END_OF_ELABORATION); 98 for (auto p: allPorts) 99 p->sc_port_base()->end_of_elaboration(); 100 for (auto m: sc_gem5::allModules) 101 m->endOfElaboration(); 102 for (auto c: sc_gem5::allChannels) 103 c->sc_chan()->end_of_elaboration(); 104 } catch (...) { 105 ::sc_gem5::scheduler.throwToScMain(); 106 } 107 108 ::sc_gem5::scheduler.elaborationDone(true); 109} 110 111void 112Kernel::startup() 113{ 114 if (scMainDone) 115 return; 116 117 schedule(t0Event, curTick()); 118 119 if (stopAfterCallbacks) 120 return; 121 122 try { 123 status(::sc_core::SC_START_OF_SIMULATION); 124 for (auto p: allPorts) 125 p->sc_port_base()->start_of_simulation(); 126 for (auto m: sc_gem5::allModules) 127 m->startOfSimulation(); 128 for (auto c: sc_gem5::allChannels) 129 c->sc_chan()->start_of_simulation(); 130 } catch (...) { 131 ::sc_gem5::scheduler.throwToScMain(); 132 } 133 134 startComplete = true; 135 136 if (stopAfterCallbacks) 137 stopWork(); 138 139 kernel->status(::sc_core::SC_RUNNING); 140} 141 142void 143Kernel::stop() 144{ 145 if (status() < ::sc_core::SC_RUNNING) 146 stopAfterCallbacks = true; 147 else 148 stopWork(); 149} 150 151void 152Kernel::stopWork() 153{ 154 status(::sc_core::SC_END_OF_SIMULATION); 155 try { 156 for (auto p: allPorts) 157 p->sc_port_base()->end_of_simulation(); 158 for (auto m: sc_gem5::allModules) 159 m->endOfSimulation(); 160 for (auto c: sc_gem5::allChannels) 161 c->sc_chan()->end_of_simulation(); 162 } catch (...) { 163 ::sc_gem5::scheduler.throwToScMain(); 164 } 165 166 endComplete = true; 167 168 status(::sc_core::SC_STOPPED); 169} 170 171void 172Kernel::t0Handler() 173{ 174 if (stopAfterCallbacks) { 175 scheduler.clear(); 176 ::sc_gem5::scheduler.initPhase(); 177 scheduler.scheduleStop(false); 178 } else { 179 ::sc_gem5::scheduler.initPhase(); 180 status(::sc_core::SC_RUNNING); 181 } 182} 183 184Kernel *kernel; 185 186} // namespace sc_gem5 187 188sc_gem5::Kernel * 189SystemC_KernelParams::create() 190{ 191 panic_if(sc_gem5::kernel, 192 "Only one systemc kernel object may be defined.\n"); 193 sc_gem5::kernel = new sc_gem5::Kernel(this); 194 return sc_gem5::kernel; 195} 196