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"
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51 # Get the size from the parent (cache) 52 size = Param.MemorySize(Parent.size, "capacity in bytes") 53 54 # Get the block size from the parent (system) 55 block_size = Param.Int(Parent.cache_line_size, "block size in bytes") 56 57 # Get the tag lookup latency from the parent (cache) 58 tag_latency = Param.Cycles(Parent.tag_latency, 59 "The tag lookup latency for this cache") 60 61 # Get the warmup percentage from the parent (cache) 62 warmup_percentage = Param.Percent(Parent.warmup_percentage, 63 "Percentage of tags to be touched to warm up the cache") 64 65 sequential_access = Param.Bool(Parent.sequential_access, 66 "Whether to access tags and data sequentially") 67 68 # Get indexing policy 69 indexing_policy = Param.BaseIndexingPolicy(SetAssociative(), 70 "Indexing policy") 71 72 # Set the indexing entry size as the block size 73 entry_size = Param.Int(Parent.cache_line_size, 74 "Indexing entry size in bytes") 75 76class BaseSetAssoc(BaseTags): 77 type = 'BaseSetAssoc' 78 cxx_header = "mem/cache/tags/base_set_assoc.hh" 79 80 # Get the cache associativity 81 assoc = Param.Int(Parent.assoc, "associativity") 82 83 # Get replacement policy from the parent (cache) 84 replacement_policy = Param.BaseReplacementPolicy( 85 Parent.replacement_policy, "Replacement policy") 86 87class SectorTags(BaseTags): 88 type = 'SectorTags' 89 cxx_header = "mem/cache/tags/sector_tags.hh" 90 91 # Get the cache associativity 92 assoc = Param.Int(Parent.assoc, "associativity") 93 94 # Number of sub-sectors (data blocks) per sector 95 num_blocks_per_sector = Param.Int(1, "Number of sub-sectors per sector"); 96 97 # The indexing entry now is a sector block 98 entry_size = Parent.cache_line_size * Self.num_blocks_per_sector 99 100 # Get replacement policy from the parent (cache) 101 replacement_policy = Param.BaseReplacementPolicy( 102 Parent.replacement_policy, "Replacement policy") 103 104class FALRU(BaseTags): 105 type = 'FALRU' 106 cxx_class = 'FALRU' 107 cxx_header = "mem/cache/tags/fa_lru.hh" 108 109 min_tracked_cache_size = Param.MemorySize("128kB", "Minimum cache size for" 110 " which we track statistics") 111 112 # This tag uses its own embedded indexing 113 indexing_policy = NULL
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