1 # Copyright (c) 2012-2013 ARM Limited
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
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22 # this software without specific prior written permission.
24 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
25 # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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34 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 # Authors: Prakash Ramrakhyani
38 from m5
.params
import *
39 from m5
.proxy
import *
40 from ClockedObject
import ClockedObject
42 class BaseTags(ClockedObject
):
45 cxx_header
= "mem/cache/tags/base.hh"
46 # Get the size from the parent (cache)
47 size
= Param
.MemorySize(Parent
.size
, "capacity in bytes")
49 # Get the block size from the parent (system)
50 block_size
= Param
.Int(Parent
.cache_line_size
, "block size in bytes")
52 # Get the tag lookup latency from the parent (cache)
53 tag_latency
= Param
.Cycles(Parent
.tag_latency
,
54 "The tag lookup latency for this cache")
56 # Get the RAM access latency from the parent (cache)
57 data_latency
= Param
.Cycles(Parent
.data_latency
,
58 "The data access latency for this cache")
60 # Get the warmup percentage from the parent (cache)
61 warmup_percentage
= Param
.Percent(Parent
.warmup_percentage
,
62 "Percentage of tags to be touched to warm up the cache")
64 sequential_access
= Param
.Bool(Parent
.sequential_access
,
65 "Whether to access tags and data sequentially")
67 class BaseSetAssoc(BaseTags
):
69 cxx_header
= "mem/cache/tags/base_set_assoc.hh"
71 # Get the cache associativity
72 assoc
= Param
.Int(Parent
.assoc
, "associativity")
74 # Get replacement policy from the parent (cache)
75 replacement_policy
= Param
.BaseReplacementPolicy(
76 Parent
.replacement_policy
, "Replacement policy")
78 class SectorTags(BaseTags
):
80 cxx_header
= "mem/cache/tags/sector_tags.hh"
82 # Get the cache associativity
83 assoc
= Param
.Int(Parent
.assoc
, "associativity")
85 # Number of sub-sectors (data blocks) per sector
86 num_blocks_per_sector
= Param
.Int(1, "Number of sub-sectors per sector");
88 # Get replacement policy from the parent (cache)
89 replacement_policy
= Param
.BaseReplacementPolicy(
90 Parent
.replacement_policy
, "Replacement policy")
92 class FALRU(BaseTags
):
95 cxx_header
= "mem/cache/tags/fa_lru.hh"
97 min_tracked_cache_size
= Param
.MemorySize("128kB", "Minimum cache size for"
98 " which we track statistics")