1/* 2 * Copyright (c) 2011 Advanced Micro Devices, Inc. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are 7 * met: redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer; 9 * redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution; 12 * neither the name of the copyright holders nor the names of its 13 * contributors may be used to endorse or promote products derived from 14 * this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 * 28 * Authors: Gabe Black 29 */ 30 31/** 32 * @file This file defines the Root simobject and the methods used to control 33 * the time syncing mechanism provided through it. 34 * 35 * Time syncing prevents simulated time from passing faster than real time. It 36 * works by scheduling a periodic event that checks to see if its simulated 37 * period is shorter than its real period. If it is, it stalls the simulation 38 * until they're equal. 39 */ 40 41#ifndef __SIM_ROOT_HH__ 42#define __SIM_ROOT_HH__ 43 44#include "base/time.hh" 45#include "params/Root.hh" 46#include "sim/eventq.hh" 47#include "sim/sim_object.hh" 48 49class Root : public SimObject 50{ 51 private: 52 static Root *_root; 53 54 protected: 55 bool _enabled; 56 Time _period; 57 Tick _periodTick; 58 Time _spinThreshold; 59 60 Time lastTime; 61 62 void timeSync();
| 1/* 2 * Copyright (c) 2011 Advanced Micro Devices, Inc. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are 7 * met: redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer; 9 * redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution; 12 * neither the name of the copyright holders nor the names of its 13 * contributors may be used to endorse or promote products derived from 14 * this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 * 28 * Authors: Gabe Black 29 */ 30 31/** 32 * @file This file defines the Root simobject and the methods used to control 33 * the time syncing mechanism provided through it. 34 * 35 * Time syncing prevents simulated time from passing faster than real time. It 36 * works by scheduling a periodic event that checks to see if its simulated 37 * period is shorter than its real period. If it is, it stalls the simulation 38 * until they're equal. 39 */ 40 41#ifndef __SIM_ROOT_HH__ 42#define __SIM_ROOT_HH__ 43 44#include "base/time.hh" 45#include "params/Root.hh" 46#include "sim/eventq.hh" 47#include "sim/sim_object.hh" 48 49class Root : public SimObject 50{ 51 private: 52 static Root *_root; 53 54 protected: 55 bool _enabled; 56 Time _period; 57 Tick _periodTick; 58 Time _spinThreshold; 59 60 Time lastTime; 61 62 void timeSync();
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