1# Copyright (c) 2012-2013 ARM Limited 2# All rights reserved. 3# 4# The license below extends only to copyright in the software and shall 5# not be construed as granting a license to any other intellectual 6# property including but not limited to intellectual property relating 7# to a hardware implementation of the functionality of the software 8# licensed hereunder. You may use the software subject to the license 9# terms below provided that you ensure that this notice is replicated 10# unmodified and in its entirety in all distributions of the software, 11# modified or unmodified, in source code or in binary form. 12# 13# Redistribution and use in source and binary forms, with or without 14# modification, are permitted provided that the following conditions are 15# met: redistributions of source code must retain the above copyright 16# notice, this list of conditions and the following disclaimer; 17# redistributions in binary form must reproduce the above copyright 18# notice, this list of conditions and the following disclaimer in the 19# documentation and/or other materials provided with the distribution; 20# neither the name of the copyright holders nor the names of its 21# contributors may be used to endorse or promote products derived from 22# this software without specific prior written permission. 23# 24# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 25# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 26# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 27# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 28# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 29# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 30# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 31# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 32# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 33# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 34# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 35# 36# Authors: Prakash Ramrakhyani 37 38from m5.params import * 39from m5.proxy import * 40from ClockedObject import ClockedObject 41from IndexingPolicies import * 42 43class BaseTags(ClockedObject): 44 type = 'BaseTags' 45 abstract = True 46 cxx_header = "mem/cache/tags/base.hh" 47 # Get the size from the parent (cache) 48 size = Param.MemorySize(Parent.size, "capacity in bytes") 49 50 # Get the block size from the parent (system) 51 block_size = Param.Int(Parent.cache_line_size, "block size in bytes") 52 53 # Get the tag lookup latency from the parent (cache) 54 tag_latency = Param.Cycles(Parent.tag_latency, 55 "The tag lookup latency for this cache") 56 |
57 # Get the warmup percentage from the parent (cache) 58 warmup_percentage = Param.Percent(Parent.warmup_percentage, 59 "Percentage of tags to be touched to warm up the cache") 60 61 sequential_access = Param.Bool(Parent.sequential_access, 62 "Whether to access tags and data sequentially") 63 64 # Get indexing policy 65 indexing_policy = Param.BaseIndexingPolicy(SetAssociative(), 66 "Indexing policy") 67 68 # Set the indexing entry size as the block size 69 entry_size = Param.Int(Parent.cache_line_size, 70 "Indexing entry size in bytes") 71 72class BaseSetAssoc(BaseTags): 73 type = 'BaseSetAssoc' 74 cxx_header = "mem/cache/tags/base_set_assoc.hh" 75 76 # Get the cache associativity 77 assoc = Param.Int(Parent.assoc, "associativity") 78 79 # Get replacement policy from the parent (cache) 80 replacement_policy = Param.BaseReplacementPolicy( 81 Parent.replacement_policy, "Replacement policy") 82 83class SectorTags(BaseTags): 84 type = 'SectorTags' 85 cxx_header = "mem/cache/tags/sector_tags.hh" 86 87 # Get the cache associativity 88 assoc = Param.Int(Parent.assoc, "associativity") 89 90 # Number of sub-sectors (data blocks) per sector 91 num_blocks_per_sector = Param.Int(1, "Number of sub-sectors per sector"); 92 93 # The indexing entry now is a sector block 94 entry_size = Parent.cache_line_size * Self.num_blocks_per_sector 95 96 # Get replacement policy from the parent (cache) 97 replacement_policy = Param.BaseReplacementPolicy( 98 Parent.replacement_policy, "Replacement policy") 99 100class FALRU(BaseTags): 101 type = 'FALRU' 102 cxx_class = 'FALRU' 103 cxx_header = "mem/cache/tags/fa_lru.hh" 104 105 min_tracked_cache_size = Param.MemorySize("128kB", "Minimum cache size for" 106 " which we track statistics") 107 108 # This tag uses its own embedded indexing 109 indexing_policy = NULL |