kernel.cc revision 12957:e54f9890363d
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#include "systemc/core/scheduler.hh" 32 33namespace SystemC 34{ 35 36Kernel::Kernel(Params *params) : 37 SimObject(params), t0Event(this, false, EventBase::Default_Pri - 1) {} 38 39void 40Kernel::startup() 41{ 42 schedule(t0Event, curTick()); 43 // Install ourselves as the scheduler's event manager. 44 ::sc_gem5::scheduler.setEventQueue(eventQueue()); 45 // Run update once before the event queue starts. 46 ::sc_gem5::scheduler.update(); 47} 48 49void 50Kernel::t0Handler() 51{ 52 // Now that the event queue has started, mark all the processes that 53 // need to be initialized as ready to run. 54 // 55 // This event has greater priority than delta notifications and so will 56 // happen before them, honoring the ordering for the initialization phase 57 // in the spec. The delta phase will happen at normal priority, and then 58 // the event which runs the processes which is at a lower priority. 59 ::sc_gem5::scheduler.prepareForInit(); 60} 61 62} // namespace SystemC 63 64SystemC::Kernel * 65SystemC_KernelParams::create() 66{ 67 return new SystemC::Kernel(this); 68} 69