Tags.py revision 12752 
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36# Authors: Prakash Ramrakhyani
37
38from m5.params import *
39from m5.proxy import *
40from ClockedObject import ClockedObject
41
42class BaseTags(ClockedObject):
43    type = 'BaseTags'
44    abstract = True
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")
48
49    # Get the block size from the parent (system)
50    block_size = Param.Int(Parent.cache_line_size, "block size in bytes")
51
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")
55
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")
59
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")
63
64    sequential_access = Param.Bool(Parent.sequential_access,
65        "Whether to access tags and data sequentially")
66
67class BaseSetAssoc(BaseTags):
68    type = 'BaseSetAssoc'
69    cxx_header = "mem/cache/tags/base_set_assoc.hh"
70
71    # Get the cache associativity
72    assoc = Param.Int(Parent.assoc, "associativity")
73
74    # Get replacement policy from the parent (cache)
75    replacement_policy = Param.BaseReplacementPolicy(
76        Parent.replacement_policy, "Replacement policy")
77
78class SectorTags(BaseTags):
79    type = 'SectorTags'
80    cxx_header = "mem/cache/tags/sector_tags.hh"
81
82    # Get the cache associativity
83    assoc = Param.Int(Parent.assoc, "associativity")
84
85    # Number of sub-sectors (data blocks) per sector
86    num_blocks_per_sector = Param.Int(1, "Number of sub-sectors per sector");
87
88    # Get replacement policy from the parent (cache)
89    replacement_policy = Param.BaseReplacementPolicy(
90        Parent.replacement_policy, "Replacement policy")
91
92class FALRU(BaseTags):
93    type = 'FALRU'
94    cxx_class = 'FALRU'
95    cxx_header = "mem/cache/tags/fa_lru.hh"
96
97    min_tracked_cache_size = Param.MemorySize("128kB", "Minimum cache size for"
98                                              " which we track statistics")
99