1# Copyright (c) 2012, 2014 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

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60 type = 'BasePrefetcher'
61 abstract = True
62 cxx_header = "mem/cache/prefetch/base.hh"
63 cxx_exports = [
64 PyBindMethod("addEventProbe"),
65 ]
66 sys = Param.System(Parent.any, "System this prefetcher belongs to")
67
68 # Get the block size from the parent (system)
69 block_size = Param.Int(Parent.cache_line_size, "Block size in bytes")
70
71 on_miss = Param.Bool(False, "Only notify prefetcher on misses")
72 on_read = Param.Bool(True, "Notify prefetcher on reads")
73 on_write = Param.Bool(True, "Notify prefetcher on writes")
74 on_data = Param.Bool(True, "Notify prefetcher on data accesses")
75 on_inst = Param.Bool(True, "Notify prefetcher on instruction accesses")
76 prefetch_on_access = Param.Bool(Parent.prefetch_on_access,
77 "Notify the hardware prefetcher on every access (not just misses)")
78

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107
108 tag_prefetch = Param.Bool(True, "Tag prefetch with PC of generating access")
109
110class StridePrefetcher(QueuedPrefetcher):
111 type = 'StridePrefetcher'
112 cxx_class = 'StridePrefetcher'
113 cxx_header = "mem/cache/prefetch/stride.hh"
114
115 # Do not consult stride prefetcher on instruction accesses
116 on_inst = False
117
118 max_conf = Param.Int(7, "Maximum confidence level")
119 thresh_conf = Param.Int(4, "Threshold confidence level")
120 min_conf = Param.Int(0, "Minimum confidence level")
121 start_conf = Param.Int(4, "Starting confidence for new entries")
122
123 table_sets = Param.Int(16, "Number of sets in PC lookup table")
124 table_assoc = Param.Int(4, "Associativity of PC lookup table")
125 use_master_id = Param.Bool(True, "Use master id based history")
126
127 degree = Param.Int(4, "Number of prefetches to generate")
128
129class TaggedPrefetcher(QueuedPrefetcher):
130 type = 'TaggedPrefetcher'
131 cxx_class = 'TaggedPrefetcher'
132 cxx_header = "mem/cache/prefetch/tagged.hh"
133
134 degree = Param.Int(2, "Number of prefetches to generate")