Prefetcher.py revision 10052
16145SN/A# Copyright (c) 2012 ARM Limited 28683SN/A# All rights reserved. 36145SN/A# 46145SN/A# The license below extends only to copyright in the software and shall 56145SN/A# not be construed as granting a license to any other intellectual 66145SN/A# property including but not limited to intellectual property relating 76145SN/A# to a hardware implementation of the functionality of the software 86145SN/A# licensed hereunder. You may use the software subject to the license 96145SN/A# terms below provided that you ensure that this notice is replicated 106145SN/A# unmodified and in its entirety in all distributions of the software, 116145SN/A# modified or unmodified, in source code or in binary form. 126145SN/A# 136145SN/A# Copyright (c) 2005 The Regents of The University of Michigan 146145SN/A# All rights reserved. 156145SN/A# 166145SN/A# Redistribution and use in source and binary forms, with or without 176145SN/A# modification, are permitted provided that the following conditions are 186145SN/A# met: redistributions of source code must retain the above copyright 196145SN/A# notice, this list of conditions and the following disclaimer; 206145SN/A# redistributions in binary form must reproduce the above copyright 216145SN/A# notice, this list of conditions and the following disclaimer in the 226145SN/A# documentation and/or other materials provided with the distribution; 236145SN/A# neither the name of the copyright holders nor the names of its 246145SN/A# contributors may be used to endorse or promote products derived from 256145SN/A# this software without specific prior written permission. 266145SN/A# 276145SN/A# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 286145SN/A# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 2910441Snilay@cs.wisc.edu# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 3010441Snilay@cs.wisc.edu# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 316145SN/A# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 327055SN/A# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 336145SN/A# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 346145SN/A# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 357039SN/A# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 369104SN/A# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 3710301Snilay@cs.wisc.edu# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 389105SN/A# 398174SN/A# Authors: Ron Dreslinski 407039SN/A 417039SN/Afrom ClockedObject import ClockedObject 427039SN/Afrom m5.params import * 4310301Snilay@cs.wisc.edufrom m5.proxy import * 4410301Snilay@cs.wisc.edu 4510301Snilay@cs.wisc.educlass BasePrefetcher(ClockedObject): 4610301Snilay@cs.wisc.edu type = 'BasePrefetcher' 477039SN/A abstract = True 487039SN/A cxx_header = "mem/cache/prefetch/base.hh" 496145SN/A size = Param.Int(100, 507039SN/A "Number of entries in the hardware prefetch queue") 517039SN/A cross_pages = Param.Bool(False, 527039SN/A "Allow prefetches to cross virtual page boundaries") 536876SN/A serial_squash = Param.Bool(False, 547039SN/A "Squash prefetches with a later time on a subsequent miss") 557039SN/A degree = Param.Int(1, 566145SN/A "Degree of the prefetch depth") 577039SN/A latency = Param.Cycles('1', "Latency of the prefetcher") 586145SN/A use_master_id = Param.Bool(True, 597039SN/A "Use the master id to separate calculations of prefetches") 607039SN/A data_accesses_only = Param.Bool(False, 618165SN/A "Only prefetch on data not on instruction accesses") 627039SN/A on_miss_only = Param.Bool(False, 636145SN/A "Only prefetch on miss (as opposed to always)") 647039SN/A on_read_only = Param.Bool(False, 658165SN/A "Only prefetch on read requests (write requests ignored)") 667039SN/A on_prefetch = Param.Bool(True, 676145SN/A "Let lower cache prefetcher train on prefetch requests") 687039SN/A sys = Param.System(Parent.any, "System this device belongs to") 697039SN/A 706145SN/Aclass GHBPrefetcher(BasePrefetcher): 717039SN/A type = 'GHBPrefetcher' 727039SN/A cxx_class = 'GHBPrefetcher' 737039SN/A cxx_header = "mem/cache/prefetch/ghb.hh" 747039SN/A 756145SN/Aclass StridePrefetcher(BasePrefetcher): 767039SN/A type = 'StridePrefetcher' 777839SN/A cxx_class = 'StridePrefetcher' 788193SN/A cxx_header = "mem/cache/prefetch/stride.hh" 798193SN/A 808193SN/Aclass TaggedPrefetcher(BasePrefetcher): 818193SN/A type = 'TaggedPrefetcher' 826145SN/A cxx_class = 'TaggedPrefetcher' 837039SN/A cxx_header = "mem/cache/prefetch/tagged.hh" 847039SN/A 856145SN/A 867039SN/A 877039SN/A 886145SN/A