kernel.cc revision 12982
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 "systemc/core/kernel.hh" 3112982Sgabeblack@google.com 3212982Sgabeblack@google.com#include "base/logging.hh" 3312982Sgabeblack@google.com#include "systemc/core/module.hh" 3412953Sgabeblack@google.com#include "systemc/core/scheduler.hh" 3512837Sgabeblack@google.com 3612982Sgabeblack@google.comnamespace sc_gem5 3712837Sgabeblack@google.com{ 3812837Sgabeblack@google.com 3912954Sgabeblack@google.comKernel::Kernel(Params *params) : 4012982Sgabeblack@google.com SimObject(params), _stopAfterCallbacks(false), 4112982Sgabeblack@google.com _startComplete(false), _endComplete(false), 4212982Sgabeblack@google.com _status(sc_core::SC_ELABORATION), 4312982Sgabeblack@google.com t0Event(this, false, EventBase::Default_Pri - 1) {} 4412982Sgabeblack@google.com 4512982Sgabeblack@google.comvoid 4612982Sgabeblack@google.comKernel::init() 4712982Sgabeblack@google.com{ 4812982Sgabeblack@google.com kernel->status(::sc_core::SC_BEFORE_END_OF_ELABORATION); 4912982Sgabeblack@google.com for (auto m: sc_gem5::allModules) 5012982Sgabeblack@google.com m->sc_mod()->before_end_of_elaboration(); 5112982Sgabeblack@google.com 5212982Sgabeblack@google.com if (_stopAfterCallbacks) 5312982Sgabeblack@google.com stopWork(); 5412982Sgabeblack@google.com} 5512982Sgabeblack@google.com 5612982Sgabeblack@google.comvoid 5712982Sgabeblack@google.comKernel::regStats() 5812982Sgabeblack@google.com{ 5912982Sgabeblack@google.com kernel->status(::sc_core::SC_END_OF_ELABORATION); 6012982Sgabeblack@google.com for (auto m: sc_gem5::allModules) 6112982Sgabeblack@google.com m->sc_mod()->end_of_elaboration(); 6212982Sgabeblack@google.com 6312982Sgabeblack@google.com if (_stopAfterCallbacks) 6412982Sgabeblack@google.com stopWork(); 6512982Sgabeblack@google.com} 6612953Sgabeblack@google.com 6712953Sgabeblack@google.comvoid 6812953Sgabeblack@google.comKernel::startup() 6912837Sgabeblack@google.com{ 7012982Sgabeblack@google.com kernel->status(::sc_core::SC_START_OF_SIMULATION); 7112982Sgabeblack@google.com for (auto m: sc_gem5::allModules) 7212982Sgabeblack@google.com m->sc_mod()->start_of_simulation(); 7312982Sgabeblack@google.com 7412982Sgabeblack@google.com _startComplete = true; 7512982Sgabeblack@google.com 7612982Sgabeblack@google.com if (_stopAfterCallbacks) 7712982Sgabeblack@google.com stopWork(); 7812982Sgabeblack@google.com 7912982Sgabeblack@google.com kernel->status(::sc_core::SC_RUNNING); 8012982Sgabeblack@google.com 8112953Sgabeblack@google.com schedule(t0Event, curTick()); 8212954Sgabeblack@google.com // Install ourselves as the scheduler's event manager. 8312954Sgabeblack@google.com ::sc_gem5::scheduler.setEventQueue(eventQueue()); 8412954Sgabeblack@google.com // Run update once before the event queue starts. 8512954Sgabeblack@google.com ::sc_gem5::scheduler.update(); 8612953Sgabeblack@google.com} 8712953Sgabeblack@google.com 8812953Sgabeblack@google.comvoid 8912982Sgabeblack@google.comKernel::stop() 9012982Sgabeblack@google.com{ 9112982Sgabeblack@google.com if (status() < ::sc_core::SC_RUNNING) 9212982Sgabeblack@google.com _stopAfterCallbacks = true; 9312982Sgabeblack@google.com else 9412982Sgabeblack@google.com stopWork(); 9512982Sgabeblack@google.com} 9612982Sgabeblack@google.com 9712982Sgabeblack@google.comvoid 9812982Sgabeblack@google.comKernel::stopWork() 9912982Sgabeblack@google.com{ 10012982Sgabeblack@google.com kernel->status(::sc_core::SC_END_OF_SIMULATION); 10112982Sgabeblack@google.com for (auto m: sc_gem5::allModules) 10212982Sgabeblack@google.com m->sc_mod()->end_of_simulation(); 10312982Sgabeblack@google.com 10412982Sgabeblack@google.com _endComplete = true; 10512982Sgabeblack@google.com 10612982Sgabeblack@google.com kernel->status(::sc_core::SC_STOPPED); 10712982Sgabeblack@google.com 10812982Sgabeblack@google.com if (_stopAfterCallbacks) 10912982Sgabeblack@google.com fatal("Simulation called sc_stop during elaboration.\n"); 11012982Sgabeblack@google.com} 11112982Sgabeblack@google.com 11212982Sgabeblack@google.comvoid 11312953Sgabeblack@google.comKernel::t0Handler() 11412953Sgabeblack@google.com{ 11512954Sgabeblack@google.com // Now that the event queue has started, mark all the processes that 11612954Sgabeblack@google.com // need to be initialized as ready to run. 11712954Sgabeblack@google.com // 11812954Sgabeblack@google.com // This event has greater priority than delta notifications and so will 11912954Sgabeblack@google.com // happen before them, honoring the ordering for the initialization phase 12012954Sgabeblack@google.com // in the spec. The delta phase will happen at normal priority, and then 12112954Sgabeblack@google.com // the event which runs the processes which is at a lower priority. 12212957Sgabeblack@google.com ::sc_gem5::scheduler.prepareForInit(); 12312982Sgabeblack@google.com 12412982Sgabeblack@google.com status(::sc_core::SC_RUNNING); 12512837Sgabeblack@google.com} 12612837Sgabeblack@google.com 12712982Sgabeblack@google.comKernel *kernel; 12812837Sgabeblack@google.com 12912982Sgabeblack@google.com} // namespace sc_gem5 13012982Sgabeblack@google.com 13112982Sgabeblack@google.comsc_gem5::Kernel * 13212837Sgabeblack@google.comSystemC_KernelParams::create() 13312837Sgabeblack@google.com{ 13412982Sgabeblack@google.com panic_if(sc_gem5::kernel, 13512982Sgabeblack@google.com "Only one systemc kernel object may be defined.\n"); 13612982Sgabeblack@google.com sc_gem5::kernel = new sc_gem5::Kernel(this); 13712982Sgabeblack@google.com return sc_gem5::kernel; 13812837Sgabeblack@google.com} 139