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# Copyright (c) 2012 The Regents of The University of Michigan
# Copyright (c) 2016 Centre National de la Recherche Scientifique
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met: redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer;
# redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution;
# neither the name of the copyright holders nor the names of its
# contributors may be used to endorse or promote products derived from
# this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
# Authors: Ron Dreslinski
# Anastasiia Butko
# Louisa Bessad
from m5.objects import *
#-----------------------------------------------------------------------
# ex5 big core (based on the ARM Cortex-A15)
#-----------------------------------------------------------------------
# Simple ALU Instructions have a latency of 1
class ex5_big_Simple_Int(FUDesc):
opList = [ OpDesc(opClass='IntAlu', opLat=1) ]
count = 2
# Complex ALU instructions have a variable latencies
class ex5_big_Complex_Int(FUDesc):
opList = [ OpDesc(opClass='IntMult', opLat=4, pipelined=True),
OpDesc(opClass='IntDiv', opLat=11, pipelined=False),
OpDesc(opClass='IprAccess', opLat=3, pipelined=True) ]
count = 1
# Floating point and SIMD instructions
class ex5_big_FP(FUDesc):
opList = [ OpDesc(opClass='SimdAdd', opLat=3),
OpDesc(opClass='SimdAddAcc', opLat=4),
OpDesc(opClass='SimdAlu', opLat=4),
OpDesc(opClass='SimdCmp', opLat=4),
OpDesc(opClass='SimdCvt', opLat=3),
OpDesc(opClass='SimdMisc', opLat=3),
OpDesc(opClass='SimdMult',opLat=6),
OpDesc(opClass='SimdMultAcc',opLat=5),
OpDesc(opClass='SimdShift',opLat=3),
OpDesc(opClass='SimdShiftAcc', opLat=3),
OpDesc(opClass='SimdSqrt', opLat=9),
OpDesc(opClass='SimdFloatAdd',opLat=6),
OpDesc(opClass='SimdFloatAlu',opLat=5),
OpDesc(opClass='SimdFloatCmp', opLat=3),
OpDesc(opClass='SimdFloatCvt', opLat=3),
OpDesc(opClass='SimdFloatDiv', opLat=21),
OpDesc(opClass='SimdFloatMisc', opLat=3),
OpDesc(opClass='SimdFloatMult', opLat=6),
OpDesc(opClass='SimdFloatMultAcc',opLat=1),
OpDesc(opClass='SimdFloatSqrt', opLat=9),
OpDesc(opClass='FloatAdd', opLat=6),
OpDesc(opClass='FloatCmp', opLat=5),
OpDesc(opClass='FloatCvt', opLat=5),
OpDesc(opClass='FloatDiv', opLat=12, pipelined=False),
OpDesc(opClass='FloatSqrt', opLat=33, pipelined=False),
OpDesc(opClass='FloatMult', opLat=8) ]
count = 2
# Load/Store Units
class ex5_big_Load(FUDesc):
opList = [ OpDesc(opClass='MemRead',opLat=2) ]
count = 1
class ex5_big_Store(FUDesc):
opList = [OpDesc(opClass='MemWrite',opLat=2) ]
count = 1
# Functional Units for this CPU
class ex5_big_FUP(FUPool):
FUList = [ex5_big_Simple_Int(), ex5_big_Complex_Int(),
ex5_big_Load(), ex5_big_Store(), ex5_big_FP()]
# Bi-Mode Branch Predictor
class ex5_big_BP(BiModeBP):
globalPredictorSize = 4096
globalCtrBits = 2
choicePredictorSize = 1024
choiceCtrBits = 3
BTBEntries = 4096
BTBTagSize = 18
RASSize = 48
instShiftAmt = 2
class ex5_big(DerivO3CPU):
LQEntries = 16
SQEntries = 16
LSQDepCheckShift = 0
LFSTSize = 1024
SSITSize = 1024
decodeToFetchDelay = 1
renameToFetchDelay = 1
iewToFetchDelay = 1
commitToFetchDelay = 1
renameToDecodeDelay = 1
iewToDecodeDelay = 1
commitToDecodeDelay = 1
iewToRenameDelay = 1
commitToRenameDelay = 1
commitToIEWDelay = 1
fetchWidth = 3
fetchBufferSize = 16
fetchToDecodeDelay = 3
decodeWidth = 3
decodeToRenameDelay = 2
renameWidth = 3
renameToIEWDelay = 1
issueToExecuteDelay = 1
dispatchWidth = 6
issueWidth = 8
wbWidth = 8
fuPool = ex5_big_FUP()
iewToCommitDelay = 1
renameToROBDelay = 1
commitWidth = 8
squashWidth = 8
trapLatency = 13
backComSize = 5
forwardComSize = 5
numPhysIntRegs = 90
numPhysFloatRegs = 256
numIQEntries = 48
numROBEntries = 60
switched_out = False
branchPred = ex5_big_BP()
class L1Cache(Cache):
tag_latency = 2
data_latency = 2
response_latency = 2
tgts_per_mshr = 8
# Consider the L2 a victim cache also for clean lines
writeback_clean = True
# Instruction Cache
class L1I(L1Cache):
mshrs = 2
size = '32kB'
assoc = 2
is_read_only = True
# Data Cache
class L1D(L1Cache):
mshrs = 6
size = '32kB'
assoc = 2
write_buffers = 16
# TLB Cache
# Use a cache as a L2 TLB
class WalkCache(Cache):
tag_latency = 4
data_latency = 4
response_latency = 4
mshrs = 6
tgts_per_mshr = 8
size = '1kB'
assoc = 8
write_buffers = 16
is_read_only = True
# Writeback clean lines as well
writeback_clean = True
# L2 Cache
class L2(Cache):
tag_latency = 15
data_latency = 15
response_latency = 15
mshrs = 16
tgts_per_mshr = 8
size = '2MB'
assoc = 16
write_buffers = 8
prefetch_on_access = True
clusivity = 'mostly_excl'
# Simple stride prefetcher
prefetcher = StridePrefetcher(degree=8, latency = 1)
tags = BaseSetAssoc()
repl_policy = RandomRP()
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