1# Copyright (c) 2005-2007 The Regents of The University of Michigan
2# All rights reserved.
3#
4# Redistribution and use in source and binary forms, with or without
5# modification, are permitted provided that the following conditions are
6# met: redistributions of source code must retain the above copyright
7# notice, this list of conditions and the following disclaimer;
8# redistributions in binary form must reproduce the above copyright
9# notice, this list of conditions and the following disclaimer in the
10# documentation and/or other materials provided with the distribution;
11# neither the name of the copyright holders nor the names of its
12# contributors may be used to endorse or promote products derived from
13# this software without specific prior written permission.
14#
15# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
16# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
17# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
18# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
19# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
20# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
21# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
25# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26#
27# Authors: Kevin Lim
28
29from m5.defines import buildEnv
30from m5.params import *
31from m5.proxy import *
32from BaseCPU import BaseCPU
33from FUPool import *
34
35if buildEnv['USE_CHECKER']:
36 from O3Checker import O3Checker
37
38class DerivO3CPU(BaseCPU):
39 type = 'DerivO3CPU'
40 activity = Param.Unsigned(0, "Initial count")
41
42 if buildEnv['USE_CHECKER']:
43 checker = Param.BaseCPU(O3Checker(workload=Parent.workload,
44 exitOnError=False,
45 updateOnError=True,
46 warnOnlyOnLoadError=False),
47 "checker")
48 checker.itb = Parent.itb
49 checker.dtb = Parent.dtb
50
51 cachePorts = Param.Unsigned(200, "Cache Ports")
52
53 decodeToFetchDelay = Param.Unsigned(1, "Decode to fetch delay")
54 renameToFetchDelay = Param.Unsigned(1 ,"Rename to fetch delay")
55 iewToFetchDelay = Param.Unsigned(1, "Issue/Execute/Writeback to fetch "
56 "delay")
57 commitToFetchDelay = Param.Unsigned(1, "Commit to fetch delay")
58 fetchWidth = Param.Unsigned(8, "Fetch width")
59
60 renameToDecodeDelay = Param.Unsigned(1, "Rename to decode delay")
61 iewToDecodeDelay = Param.Unsigned(1, "Issue/Execute/Writeback to decode "
62 "delay")
63 commitToDecodeDelay = Param.Unsigned(1, "Commit to decode delay")
64 fetchToDecodeDelay = Param.Unsigned(1, "Fetch to decode delay")
65 decodeWidth = Param.Unsigned(8, "Decode width")
66
67 iewToRenameDelay = Param.Unsigned(1, "Issue/Execute/Writeback to rename "
68 "delay")
69 commitToRenameDelay = Param.Unsigned(1, "Commit to rename delay")
70 decodeToRenameDelay = Param.Unsigned(1, "Decode to rename delay")
71 renameWidth = Param.Unsigned(8, "Rename width")
72
73 commitToIEWDelay = Param.Unsigned(1, "Commit to "
74 "Issue/Execute/Writeback delay")
75 renameToIEWDelay = Param.Unsigned(2, "Rename to "
76 "Issue/Execute/Writeback delay")
77 issueToExecuteDelay = Param.Unsigned(1, "Issue to execute delay (internal "
78 "to the IEW stage)")
79 dispatchWidth = Param.Unsigned(8, "Dispatch width")
80 issueWidth = Param.Unsigned(8, "Issue width")
81 wbWidth = Param.Unsigned(8, "Writeback width")
82 wbDepth = Param.Unsigned(1, "Writeback depth")
83 fuPool = Param.FUPool(DefaultFUPool(), "Functional Unit pool")
84
85 iewToCommitDelay = Param.Unsigned(1, "Issue/Execute/Writeback to commit "
86 "delay")
87 renameToROBDelay = Param.Unsigned(1, "Rename to reorder buffer delay")
88 commitWidth = Param.Unsigned(8, "Commit width")
89 squashWidth = Param.Unsigned(8, "Squash width")
90 trapLatency = Param.Tick(13, "Trap latency")
91 fetchTrapLatency = Param.Tick(1, "Fetch trap latency")
92
93 backComSize = Param.Unsigned(5, "Time buffer size for backwards communication")
94 forwardComSize = Param.Unsigned(5, "Time buffer size for forward communication")
95
96 predType = Param.String("tournament", "Branch predictor type ('local', 'tournament')")
97 localPredictorSize = Param.Unsigned(2048, "Size of local predictor")
98 localCtrBits = Param.Unsigned(2, "Bits per counter")
99 localHistoryTableSize = Param.Unsigned(2048, "Size of local history table")
100 localHistoryBits = Param.Unsigned(11, "Bits for the local history")
101 globalPredictorSize = Param.Unsigned(8192, "Size of global predictor")
102 globalCtrBits = Param.Unsigned(2, "Bits per counter")
103 globalHistoryBits = Param.Unsigned(13, "Bits of history")
104 choicePredictorSize = Param.Unsigned(8192, "Size of choice predictor")
105 choiceCtrBits = Param.Unsigned(2, "Bits of choice counters")
106
107 BTBEntries = Param.Unsigned(4096, "Number of BTB entries")
108 BTBTagSize = Param.Unsigned(16, "Size of the BTB tags, in bits")
109
110 RASSize = Param.Unsigned(16, "RAS size")
111
112 LQEntries = Param.Unsigned(32, "Number of load queue entries")
113 SQEntries = Param.Unsigned(32, "Number of store queue entries")
114 LSQDepCheckShift = Param.Unsigned(4, "Number of places to shift addr before check")
115 LSQCheckLoads = Param.Bool(True,
116 "Should dependency violations be checked for loads & stores or just stores")
117 store_set_clear_period = Param.Unsigned(250000,
118 "Number of load/store insts before the dep predictor should be invalidated")
119 LFSTSize = Param.Unsigned(1024, "Last fetched store table size")
120 SSITSize = Param.Unsigned(1024, "Store set ID table size")
121
122 numRobs = Param.Unsigned(1, "Number of Reorder Buffers");
123
124 numPhysIntRegs = Param.Unsigned(256, "Number of physical integer registers")
125 numPhysFloatRegs = Param.Unsigned(256, "Number of physical floating point "
126 "registers")
127 numIQEntries = Param.Unsigned(64, "Number of instruction queue entries")
128 numROBEntries = Param.Unsigned(192, "Number of reorder buffer entries")
129
130 instShiftAmt = Param.Unsigned(2, "Number of bits to shift instructions by")
131
132 smtNumFetchingThreads = Param.Unsigned(1, "SMT Number of Fetching Threads")
133 smtFetchPolicy = Param.String('SingleThread', "SMT Fetch policy")
134 smtLSQPolicy = Param.String('Partitioned', "SMT LSQ Sharing Policy")
135 smtLSQThreshold = Param.Int(100, "SMT LSQ Threshold Sharing Parameter")
136 smtIQPolicy = Param.String('Partitioned', "SMT IQ Sharing Policy")
137 smtIQThreshold = Param.Int(100, "SMT IQ Threshold Sharing Parameter")
138 smtROBPolicy = Param.String('Partitioned', "SMT ROB Sharing Policy")
139 smtROBThreshold = Param.Int(100, "SMT ROB Threshold Sharing Parameter")
140 smtCommitPolicy = Param.String('RoundRobin', "SMT Commit Policy")
141