1# Copyright (c) 2012 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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40
41from ClockedObject import ClockedObject
42from m5.params import *
43from m5.proxy import *
44
45class BasePrefetcher(ClockedObject):
46 type = 'BasePrefetcher'
47 abstract = True
48 size = Param.Int(100,
49 "Number of entries in the hardware prefetch queue")
50 cross_pages = Param.Bool(False,
51 "Allow prefetches to cross virtual page boundaries")
52 serial_squash = Param.Bool(False,
53 "Squash prefetches with a later time on a subsequent miss")
54 degree = Param.Int(1,
55 "Degree of the prefetch depth")
56 latency = Param.Cycles('1', "Latency of the prefetcher")
57 use_master_id = Param.Bool(True,
58 "Use the master id to separate calculations of prefetches")
59 data_accesses_only = Param.Bool(False,
60 "Only prefetch on data not on instruction accesses")
61 sys = Param.System(Parent.any, "System this device belongs to")
62
63class GHBPrefetcher(BasePrefetcher):
64 type = 'GHBPrefetcher'
65 cxx_class = 'GHBPrefetcher'
66
67class StridePrefetcher(BasePrefetcher):
68 type = 'StridePrefetcher'
69 cxx_class = 'StridePrefetcher'
70
71class TaggedPrefetcher(BasePrefetcher):
72 type = 'TaggedPrefetcher'
73 cxx_class = 'TaggedPrefetcher'
74
75
76
77