Prefetcher.py revision 9338
16657Snate@binkert.org# Copyright (c) 2012 ARM Limited 26657Snate@binkert.org# All rights reserved. 36657Snate@binkert.org# 46657Snate@binkert.org# The license below extends only to copyright in the software and shall 56657Snate@binkert.org# not be construed as granting a license to any other intellectual 66657Snate@binkert.org# property including but not limited to intellectual property relating 76657Snate@binkert.org# to a hardware implementation of the functionality of the software 86657Snate@binkert.org# licensed hereunder. You may use the software subject to the license 96657Snate@binkert.org# terms below provided that you ensure that this notice is replicated 106657Snate@binkert.org# unmodified and in its entirety in all distributions of the software, 116657Snate@binkert.org# modified or unmodified, in source code or in binary form. 126657Snate@binkert.org# 136657Snate@binkert.org# Copyright (c) 2005 The Regents of The University of Michigan 146657Snate@binkert.org# All rights reserved. 156657Snate@binkert.org# 166657Snate@binkert.org# Redistribution and use in source and binary forms, with or without 176657Snate@binkert.org# modification, are permitted provided that the following conditions are 186657Snate@binkert.org# met: redistributions of source code must retain the above copyright 196657Snate@binkert.org# notice, this list of conditions and the following disclaimer; 206657Snate@binkert.org# redistributions in binary form must reproduce the above copyright 216657Snate@binkert.org# notice, this list of conditions and the following disclaimer in the 226657Snate@binkert.org# documentation and/or other materials provided with the distribution; 236657Snate@binkert.org# neither the name of the copyright holders nor the names of its 246657Snate@binkert.org# contributors may be used to endorse or promote products derived from 256657Snate@binkert.org# this software without specific prior written permission. 266657Snate@binkert.org# 276657Snate@binkert.org# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 286657Snate@binkert.org# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 296657Snate@binkert.org# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 306657Snate@binkert.org# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 316657Snate@binkert.org# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 326657Snate@binkert.org# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 336657Snate@binkert.org# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 346657Snate@binkert.org# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 356657Snate@binkert.org# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 366657Snate@binkert.org# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 376657Snate@binkert.org# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 386657Snate@binkert.org# 396657Snate@binkert.org# Authors: Ron Dreslinski 406657Snate@binkert.org 416657Snate@binkert.orgfrom ClockedObject import ClockedObject 426657Snate@binkert.orgfrom m5.params import * 436657Snate@binkert.orgfrom m5.proxy import * 446657Snate@binkert.org 456657Snate@binkert.orgclass BasePrefetcher(ClockedObject): 466657Snate@binkert.org type = 'BasePrefetcher' 476657Snate@binkert.org abstract = True 486657Snate@binkert.org cxx_header = "mem/cache/prefetch/base.hh" 496657Snate@binkert.org size = Param.Int(100, 506657Snate@binkert.org "Number of entries in the hardware prefetch queue") 516657Snate@binkert.org cross_pages = Param.Bool(False, 526657Snate@binkert.org "Allow prefetches to cross virtual page boundaries") 536657Snate@binkert.org serial_squash = Param.Bool(False, 546657Snate@binkert.org "Squash prefetches with a later time on a subsequent miss") 556657Snate@binkert.org degree = Param.Int(1, 566657Snate@binkert.org "Degree of the prefetch depth") 576657Snate@binkert.org latency = Param.Cycles('1', "Latency of the prefetcher") 586657Snate@binkert.org use_master_id = Param.Bool(True, 596657Snate@binkert.org "Use the master id to separate calculations of prefetches") 606657Snate@binkert.org data_accesses_only = Param.Bool(False, 616657Snate@binkert.org "Only prefetch on data not on instruction accesses") 626657Snate@binkert.org sys = Param.System(Parent.any, "System this device belongs to") 636657Snate@binkert.org 646657Snate@binkert.orgclass GHBPrefetcher(BasePrefetcher): 656657Snate@binkert.org type = 'GHBPrefetcher' 666657Snate@binkert.org cxx_class = 'GHBPrefetcher' 676657Snate@binkert.org cxx_header = "mem/cache/prefetch/ghb.hh" 686657Snate@binkert.org 696657Snate@binkert.orgclass StridePrefetcher(BasePrefetcher): 706657Snate@binkert.org type = 'StridePrefetcher' 716657Snate@binkert.org cxx_class = 'StridePrefetcher' 726657Snate@binkert.org cxx_header = "mem/cache/prefetch/stride.hh" 736657Snate@binkert.org 746657Snate@binkert.orgclass TaggedPrefetcher(BasePrefetcher): 756657Snate@binkert.org type = 'TaggedPrefetcher' 766657Snate@binkert.org cxx_class = 'TaggedPrefetcher' 776657Snate@binkert.org cxx_header = "mem/cache/prefetch/tagged.hh" 786657Snate@binkert.org 796657Snate@binkert.org 806657Snate@binkert.org 816657Snate@binkert.org 826657Snate@binkert.org