stride.hh revision 10028
12810SN/A/* 210028SGiacomo.Gabrielli@arm.com * Copyright (c) 2012-2013 ARM Limited 310028SGiacomo.Gabrielli@arm.com * All rights reserved 410028SGiacomo.Gabrielli@arm.com * 510028SGiacomo.Gabrielli@arm.com * The license below extends only to copyright in the software and shall 610028SGiacomo.Gabrielli@arm.com * not be construed as granting a license to any other intellectual 710028SGiacomo.Gabrielli@arm.com * property including but not limited to intellectual property relating 810028SGiacomo.Gabrielli@arm.com * to a hardware implementation of the functionality of the software 910028SGiacomo.Gabrielli@arm.com * licensed hereunder. You may use the software subject to the license 1010028SGiacomo.Gabrielli@arm.com * terms below provided that you ensure that this notice is replicated 1110028SGiacomo.Gabrielli@arm.com * unmodified and in its entirety in all distributions of the software, 1210028SGiacomo.Gabrielli@arm.com * modified or unmodified, in source code or in binary form. 1310028SGiacomo.Gabrielli@arm.com * 142810SN/A * Copyright (c) 2005 The Regents of The University of Michigan 152810SN/A * All rights reserved. 162810SN/A * 172810SN/A * Redistribution and use in source and binary forms, with or without 182810SN/A * modification, are permitted provided that the following conditions are 192810SN/A * met: redistributions of source code must retain the above copyright 202810SN/A * notice, this list of conditions and the following disclaimer; 212810SN/A * redistributions in binary form must reproduce the above copyright 222810SN/A * notice, this list of conditions and the following disclaimer in the 232810SN/A * documentation and/or other materials provided with the distribution; 242810SN/A * neither the name of the copyright holders nor the names of its 252810SN/A * contributors may be used to endorse or promote products derived from 262810SN/A * this software without specific prior written permission. 272810SN/A * 282810SN/A * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 292810SN/A * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 302810SN/A * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 312810SN/A * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 322810SN/A * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 332810SN/A * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 342810SN/A * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 352810SN/A * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 362810SN/A * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 372810SN/A * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 382810SN/A * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 392810SN/A * 402810SN/A * Authors: Ron Dreslinski 412810SN/A */ 422810SN/A 432810SN/A/** 442810SN/A * @file 453861SN/A * Describes a strided prefetcher. 462810SN/A */ 472810SN/A 482810SN/A#ifndef __MEM_CACHE_PREFETCH_STRIDE_PREFETCHER_HH__ 492810SN/A#define __MEM_CACHE_PREFETCH_STRIDE_PREFETCHER_HH__ 502810SN/A 518229Snate@binkert.org#include <climits> 528229Snate@binkert.org 535338Sstever@gmail.com#include "mem/cache/prefetch/base.hh" 548831Smrinmoy.ghosh@arm.com#include "params/StridePrefetcher.hh" 552810SN/A 563861SN/Aclass StridePrefetcher : public BasePrefetcher 572810SN/A{ 582810SN/A protected: 592810SN/A 605875Ssteve.reinhardt@amd.com static const int Max_Contexts = 64; 615875Ssteve.reinhardt@amd.com 625875Ssteve.reinhardt@amd.com // These constants need to be changed with the type of the 635875Ssteve.reinhardt@amd.com // 'confidence' field below. 645875Ssteve.reinhardt@amd.com static const int Max_Conf = INT_MAX; 655875Ssteve.reinhardt@amd.com static const int Min_Conf = INT_MIN; 665875Ssteve.reinhardt@amd.com 675875Ssteve.reinhardt@amd.com class StrideEntry 682810SN/A { 692810SN/A public: 705875Ssteve.reinhardt@amd.com Addr instAddr; 715875Ssteve.reinhardt@amd.com Addr missAddr; 7210028SGiacomo.Gabrielli@arm.com bool isSecure; 732810SN/A int stride; 745875Ssteve.reinhardt@amd.com int confidence; 755875Ssteve.reinhardt@amd.com }; 762810SN/A 775875Ssteve.reinhardt@amd.com std::list<StrideEntry*> table[Max_Contexts]; 782810SN/A 792810SN/A public: 802810SN/A 818831Smrinmoy.ghosh@arm.com StridePrefetcher(const Params *p) 828831Smrinmoy.ghosh@arm.com : BasePrefetcher(p) 832810SN/A { 842810SN/A } 852810SN/A 862810SN/A ~StridePrefetcher() {} 872810SN/A 883349SN/A void calculatePrefetch(PacketPtr &pkt, std::list<Addr> &addresses, 899288Sandreas.hansson@arm.com std::list<Cycles> &delays); 902810SN/A}; 912810SN/A 922810SN/A#endif // __MEM_CACHE_PREFETCH_STRIDE_PREFETCHER_HH__ 93