clocked_object.hh revision 9157
19157Sandreas.hansson@arm.com/* 29157Sandreas.hansson@arm.com * Copyright (c) 2012 ARM Limited 39157Sandreas.hansson@arm.com * All rights reserved 49157Sandreas.hansson@arm.com * 59157Sandreas.hansson@arm.com * The license below extends only to copyright in the software and shall 69157Sandreas.hansson@arm.com * not be construed as granting a license to any other intellectual 79157Sandreas.hansson@arm.com * property including but not limited to intellectual property relating 89157Sandreas.hansson@arm.com * to a hardware implementation of the functionality of the software 99157Sandreas.hansson@arm.com * licensed hereunder. You may use the software subject to the license 109157Sandreas.hansson@arm.com * terms below provided that you ensure that this notice is replicated 119157Sandreas.hansson@arm.com * unmodified and in its entirety in all distributions of the software, 129157Sandreas.hansson@arm.com * modified or unmodified, in source code or in binary form. 139157Sandreas.hansson@arm.com * 149157Sandreas.hansson@arm.com * Redistribution and use in source and binary forms, with or without 159157Sandreas.hansson@arm.com * modification, are permitted provided that the following conditions are 169157Sandreas.hansson@arm.com * met: redistributions of source code must retain the above copyright 179157Sandreas.hansson@arm.com * notice, this list of conditions and the following disclaimer; 189157Sandreas.hansson@arm.com * redistributions in binary form must reproduce the above copyright 199157Sandreas.hansson@arm.com * notice, this list of conditions and the following disclaimer in the 209157Sandreas.hansson@arm.com * documentation and/or other materials provided with the distribution; 219157Sandreas.hansson@arm.com * neither the name of the copyright holders nor the names of its 229157Sandreas.hansson@arm.com * contributors may be used to endorse or promote products derived from 239157Sandreas.hansson@arm.com * this software without specific prior written permission. 249157Sandreas.hansson@arm.com * 259157Sandreas.hansson@arm.com * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 269157Sandreas.hansson@arm.com * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 279157Sandreas.hansson@arm.com * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 289157Sandreas.hansson@arm.com * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 299157Sandreas.hansson@arm.com * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 309157Sandreas.hansson@arm.com * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 319157Sandreas.hansson@arm.com * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 329157Sandreas.hansson@arm.com * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 339157Sandreas.hansson@arm.com * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 349157Sandreas.hansson@arm.com * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 359157Sandreas.hansson@arm.com * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 369157Sandreas.hansson@arm.com * 379157Sandreas.hansson@arm.com * Authors: Andreas Hansson 389157Sandreas.hansson@arm.com */ 399157Sandreas.hansson@arm.com 409157Sandreas.hansson@arm.com/** 419157Sandreas.hansson@arm.com * @file 429157Sandreas.hansson@arm.com * ClockedObject declaration and implementation. 439157Sandreas.hansson@arm.com */ 449157Sandreas.hansson@arm.com 459157Sandreas.hansson@arm.com#ifndef __SIM_CLOCKED_OBJECT_HH__ 469157Sandreas.hansson@arm.com#define __SIM_CLOCKED_OBJECT_HH__ 479157Sandreas.hansson@arm.com 489157Sandreas.hansson@arm.com#include "base/intmath.hh" 499157Sandreas.hansson@arm.com#include "params/ClockedObject.hh" 509157Sandreas.hansson@arm.com#include "sim/sim_object.hh" 519157Sandreas.hansson@arm.com 529157Sandreas.hansson@arm.com/** 539157Sandreas.hansson@arm.com * The ClockedObject class extends the SimObject with a clock and 549157Sandreas.hansson@arm.com * accessor functions to relate ticks to the cycles of the object. 559157Sandreas.hansson@arm.com */ 569157Sandreas.hansson@arm.comclass ClockedObject : public SimObject 579157Sandreas.hansson@arm.com{ 589157Sandreas.hansson@arm.com 599157Sandreas.hansson@arm.com private: 609157Sandreas.hansson@arm.com 619157Sandreas.hansson@arm.com /** 629157Sandreas.hansson@arm.com * Prevent inadvertent use of the copy constructor and assignment 639157Sandreas.hansson@arm.com * operator by making them private. 649157Sandreas.hansson@arm.com */ 659157Sandreas.hansson@arm.com ClockedObject(ClockedObject&); 669157Sandreas.hansson@arm.com ClockedObject& operator=(ClockedObject&); 679157Sandreas.hansson@arm.com 689157Sandreas.hansson@arm.com protected: 699157Sandreas.hansson@arm.com 709157Sandreas.hansson@arm.com // Clock period in ticks 719157Sandreas.hansson@arm.com Tick clock; 729157Sandreas.hansson@arm.com 739157Sandreas.hansson@arm.com /** 749157Sandreas.hansson@arm.com * Create a clocked object and set the clock based on the 759157Sandreas.hansson@arm.com * parameters. 769157Sandreas.hansson@arm.com */ 779157Sandreas.hansson@arm.com ClockedObject(const ClockedObjectParams* p) : SimObject(p), clock(p->clock) 789157Sandreas.hansson@arm.com { } 799157Sandreas.hansson@arm.com 809157Sandreas.hansson@arm.com /** 819157Sandreas.hansson@arm.com * Virtual destructor due to inheritance. 829157Sandreas.hansson@arm.com */ 839157Sandreas.hansson@arm.com virtual ~ClockedObject() { } 849157Sandreas.hansson@arm.com 859157Sandreas.hansson@arm.com public: 869157Sandreas.hansson@arm.com 879157Sandreas.hansson@arm.com /** 889157Sandreas.hansson@arm.com * Based on the clock of the object, determine the tick when the 899157Sandreas.hansson@arm.com * next cycle begins, in other words, round the curTick() to the 909157Sandreas.hansson@arm.com * next tick that is a multiple of the clock. 919157Sandreas.hansson@arm.com * 929157Sandreas.hansson@arm.com * @return The tick when the next cycle starts 939157Sandreas.hansson@arm.com */ 949157Sandreas.hansson@arm.com Tick nextCycle() const 959157Sandreas.hansson@arm.com { return divCeil(curTick(), clock) * clock; } 969157Sandreas.hansson@arm.com 979157Sandreas.hansson@arm.com /** 989157Sandreas.hansson@arm.com * Determine the next cycle starting from a given tick instead of 999157Sandreas.hansson@arm.com * curTick(). 1009157Sandreas.hansson@arm.com * 1019157Sandreas.hansson@arm.com * @param begin_tick The tick to round to a clock edge 1029157Sandreas.hansson@arm.com * 1039157Sandreas.hansson@arm.com * @return The tick when the cycle after or on begin_tick starts 1049157Sandreas.hansson@arm.com */ 1059157Sandreas.hansson@arm.com Tick nextCycle(Tick begin_tick) const 1069157Sandreas.hansson@arm.com { return divCeil(begin_tick, clock) * clock; } 1079157Sandreas.hansson@arm.com 1089157Sandreas.hansson@arm.com inline Tick frequency() const { return SimClock::Frequency / clock; } 1099157Sandreas.hansson@arm.com 1109157Sandreas.hansson@arm.com inline Tick ticks(int numCycles) const { return clock * numCycles; } 1119157Sandreas.hansson@arm.com 1129157Sandreas.hansson@arm.com inline Tick curCycle() const { return curTick() / clock; } 1139157Sandreas.hansson@arm.com 1149157Sandreas.hansson@arm.com inline Tick tickToCycles(Tick val) const { return val / clock; } 1159157Sandreas.hansson@arm.com 1169157Sandreas.hansson@arm.com}; 1179157Sandreas.hansson@arm.com 1189157Sandreas.hansson@arm.com#endif //__SIM_CLOCKED_OBJECT_HH__ 119