kernel.cc revision 13045
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 3912990Sgabeblack@google.comnamespace 4012990Sgabeblack@google.com{ 4112990Sgabeblack@google.com 4212990Sgabeblack@google.combool stopAfterCallbacks = false; 4312990Sgabeblack@google.combool startComplete = false; 4412990Sgabeblack@google.combool endComplete = false; 4512990Sgabeblack@google.com 4612990Sgabeblack@google.comsc_core::sc_status _status = sc_core::SC_ELABORATION; 4712990Sgabeblack@google.com 4812990Sgabeblack@google.com} // anonymous namespace 4912990Sgabeblack@google.com 5012990Sgabeblack@google.combool Kernel::startOfSimulationComplete() { return startComplete; } 5112990Sgabeblack@google.combool Kernel::endOfSimulationComplete() { return endComplete; } 5212990Sgabeblack@google.com 5312990Sgabeblack@google.comsc_core::sc_status Kernel::status() { return _status; } 5412990Sgabeblack@google.comvoid Kernel::status(sc_core::sc_status s) { _status = s; } 5512990Sgabeblack@google.com 5612954Sgabeblack@google.comKernel::Kernel(Params *params) : 5713042Sgabeblack@google.com SimObject(params), t0Event(this, false, EventBase::Default_Pri - 1) 5813042Sgabeblack@google.com{ 5913042Sgabeblack@google.com // Install ourselves as the scheduler's event manager. 6013042Sgabeblack@google.com ::sc_gem5::scheduler.setEventQueue(eventQueue()); 6113042Sgabeblack@google.com} 6212982Sgabeblack@google.com 6312982Sgabeblack@google.comvoid 6412982Sgabeblack@google.comKernel::init() 6512982Sgabeblack@google.com{ 6612990Sgabeblack@google.com status(::sc_core::SC_BEFORE_END_OF_ELABORATION); 6713045Sgabeblack@google.com for (auto m: sc_gem5::allModules) { 6813045Sgabeblack@google.com callbackModule(m); 6912982Sgabeblack@google.com m->sc_mod()->before_end_of_elaboration(); 7013045Sgabeblack@google.com } 7113045Sgabeblack@google.com callbackModule(nullptr); 7212982Sgabeblack@google.com 7312990Sgabeblack@google.com if (stopAfterCallbacks) 7412982Sgabeblack@google.com stopWork(); 7512982Sgabeblack@google.com} 7612982Sgabeblack@google.com 7712982Sgabeblack@google.comvoid 7812982Sgabeblack@google.comKernel::regStats() 7912982Sgabeblack@google.com{ 8012990Sgabeblack@google.com status(::sc_core::SC_END_OF_ELABORATION); 8112982Sgabeblack@google.com for (auto m: sc_gem5::allModules) 8212982Sgabeblack@google.com m->sc_mod()->end_of_elaboration(); 8312982Sgabeblack@google.com 8412990Sgabeblack@google.com if (stopAfterCallbacks) 8512982Sgabeblack@google.com stopWork(); 8612982Sgabeblack@google.com} 8712953Sgabeblack@google.com 8812953Sgabeblack@google.comvoid 8912953Sgabeblack@google.comKernel::startup() 9012837Sgabeblack@google.com{ 9112990Sgabeblack@google.com status(::sc_core::SC_START_OF_SIMULATION); 9212982Sgabeblack@google.com for (auto m: sc_gem5::allModules) 9312982Sgabeblack@google.com m->sc_mod()->start_of_simulation(); 9412982Sgabeblack@google.com 9512990Sgabeblack@google.com startComplete = true; 9612982Sgabeblack@google.com 9712990Sgabeblack@google.com if (stopAfterCallbacks) 9812982Sgabeblack@google.com stopWork(); 9912982Sgabeblack@google.com 10012982Sgabeblack@google.com kernel->status(::sc_core::SC_RUNNING); 10112982Sgabeblack@google.com 10212953Sgabeblack@google.com schedule(t0Event, curTick()); 10312954Sgabeblack@google.com // Run update once before the event queue starts. 10412954Sgabeblack@google.com ::sc_gem5::scheduler.update(); 10512953Sgabeblack@google.com} 10612953Sgabeblack@google.com 10712953Sgabeblack@google.comvoid 10812982Sgabeblack@google.comKernel::stop() 10912982Sgabeblack@google.com{ 11012982Sgabeblack@google.com if (status() < ::sc_core::SC_RUNNING) 11112990Sgabeblack@google.com stopAfterCallbacks = true; 11212982Sgabeblack@google.com else 11312982Sgabeblack@google.com stopWork(); 11412982Sgabeblack@google.com} 11512982Sgabeblack@google.com 11612982Sgabeblack@google.comvoid 11712982Sgabeblack@google.comKernel::stopWork() 11812982Sgabeblack@google.com{ 11912990Sgabeblack@google.com status(::sc_core::SC_END_OF_SIMULATION); 12012982Sgabeblack@google.com for (auto m: sc_gem5::allModules) 12112982Sgabeblack@google.com m->sc_mod()->end_of_simulation(); 12212982Sgabeblack@google.com 12312990Sgabeblack@google.com endComplete = true; 12412982Sgabeblack@google.com 12512990Sgabeblack@google.com status(::sc_core::SC_STOPPED); 12612982Sgabeblack@google.com 12712990Sgabeblack@google.com if (stopAfterCallbacks) 12812982Sgabeblack@google.com fatal("Simulation called sc_stop during elaboration.\n"); 12912982Sgabeblack@google.com} 13012982Sgabeblack@google.com 13112982Sgabeblack@google.comvoid 13212953Sgabeblack@google.comKernel::t0Handler() 13312953Sgabeblack@google.com{ 13412954Sgabeblack@google.com // Now that the event queue has started, mark all the processes that 13512954Sgabeblack@google.com // need to be initialized as ready to run. 13612954Sgabeblack@google.com // 13712954Sgabeblack@google.com // This event has greater priority than delta notifications and so will 13812954Sgabeblack@google.com // happen before them, honoring the ordering for the initialization phase 13912954Sgabeblack@google.com // in the spec. The delta phase will happen at normal priority, and then 14012954Sgabeblack@google.com // the event which runs the processes which is at a lower priority. 14112957Sgabeblack@google.com ::sc_gem5::scheduler.prepareForInit(); 14212982Sgabeblack@google.com 14312982Sgabeblack@google.com status(::sc_core::SC_RUNNING); 14412837Sgabeblack@google.com} 14512837Sgabeblack@google.com 14612982Sgabeblack@google.comKernel *kernel; 14712837Sgabeblack@google.com 14812982Sgabeblack@google.com} // namespace sc_gem5 14912982Sgabeblack@google.com 15012982Sgabeblack@google.comsc_gem5::Kernel * 15112837Sgabeblack@google.comSystemC_KernelParams::create() 15212837Sgabeblack@google.com{ 15312982Sgabeblack@google.com panic_if(sc_gem5::kernel, 15412982Sgabeblack@google.com "Only one systemc kernel object may be defined.\n"); 15512982Sgabeblack@google.com sc_gem5::kernel = new sc_gem5::Kernel(this); 15612982Sgabeblack@google.com return sc_gem5::kernel; 15712837Sgabeblack@google.com} 158