Cache.py revision 5875
1# Copyright (c) 2005-2007 The Regents of The University of Michigan 2# All rights reserved. 3# 4# Redistribution and use in source and binary forms, with or without 5# modification, are permitted provided that the following conditions are 6# met: redistributions of source code must retain the above copyright 7# notice, this list of conditions and the following disclaimer; 8# redistributions in binary form must reproduce the above copyright 9# notice, this list of conditions and the following disclaimer in the 10# documentation and/or other materials provided with the distribution; 11# neither the name of the copyright holders nor the names of its 12# contributors may be used to endorse or promote products derived from 13# this software without specific prior written permission. 14# 15# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 16# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 17# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 18# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 19# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 20# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 21# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 25# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26# 27# Authors: Nathan Binkert 28 29from m5.params import * 30from m5.proxy import Self 31from MemObject import MemObject 32 33class Prefetch(Enum): vals = ['none', 'tagged', 'stride', 'ghb'] 34 35class BaseCache(MemObject): 36 type = 'BaseCache' 37 assoc = Param.Int("associativity") 38 block_size = Param.Int("block size in bytes") 39 latency = Param.Latency("Latency") 40 hash_delay = Param.Int(1, "time in cycles of hash access") 41 max_miss_count = Param.Counter(0, 42 "number of misses to handle before calling exit") 43 mshrs = Param.Int("number of MSHRs (max outstanding requests)") 44 prioritizeRequests = Param.Bool(False, 45 "always service demand misses first") 46 repl = Param.Repl(NULL, "replacement policy") 47 size = Param.MemorySize("capacity in bytes") 48 subblock_size = Param.Int(0, 49 "Size of subblock in IIC used for compression") 50 tgts_per_mshr = Param.Int("max number of accesses per MSHR") 51 trace_addr = Param.Addr(0, "address to trace") 52 two_queue = Param.Bool(False, 53 "whether the lifo should have two queue replacement") 54 write_buffers = Param.Int(8, "number of write buffers") 55 prefetch_on_access = Param.Bool(False, 56 "notify the hardware prefetcher on every access (not just misses)") 57 prefetcher_size = Param.Int(100, 58 "Number of entries in the hardware prefetch queue") 59 prefetch_past_page = Param.Bool(False, 60 "Allow prefetches to cross virtual page boundaries") 61 prefetch_serial_squash = Param.Bool(False, 62 "Squash prefetches with a later time on a subsequent miss") 63 prefetch_degree = Param.Int(1, 64 "Degree of the prefetch depth") 65 prefetch_latency = Param.Latency(10 * Self.latency, 66 "Latency of the prefetcher") 67 prefetch_policy = Param.Prefetch('none', 68 "Type of prefetcher to use") 69 prefetch_cache_check_push = Param.Bool(True, 70 "Check if in cache on push or pop of prefetch queue") 71 prefetch_use_cpu_id = Param.Bool(True, 72 "Use the CPU ID to separate calculations of prefetches") 73 prefetch_data_accesses_only = Param.Bool(False, 74 "Only prefetch on data not on instruction accesses") 75 cpu_side = Port("Port on side closer to CPU") 76 mem_side = Port("Port on side closer to MEM") 77 cpu_side_filter_ranges = VectorParam.AddrRange([], 78 "What addresses shouldn't be passed through the side of the bridge") 79 mem_side_filter_ranges = VectorParam.AddrRange([], 80 "What addresses shouldn't be passed through the side of the bridge") 81 addr_range = VectorParam.AddrRange(AllMemory, "The address range in bytes") 82