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# Copyright (c) 2013 - 2016 ARM Limited
# All rights reserved.
#
# The license below extends only to copyright in the software and shall
# not be construed as granting a license to any other intellectual
# property including but not limited to intellectual property relating
# to a hardware implementation of the functionality of the software
# licensed hereunder. You may use the software subject to the license
# terms below provided that you ensure that this notice is replicated
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# modified or unmodified, in source code or in binary form.
#
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# 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
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# neither the name of the copyright holders nor the names of its
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# this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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from m5.params import *
from m5.objects.BaseCPU import BaseCPU
class TraceCPU(BaseCPU):
"""Trace CPU model which replays traces generated in a prior simulation
using DerivO3CPU or its derived classes. It interfaces with L1 caches.
"""
type = "TraceCPU"
cxx_header = "cpu/trace/trace_cpu.hh"
cxx_class = "gem5::TraceCPU"
@classmethod
def memory_mode(cls):
return "timing"
@classmethod
def require_caches(cls):
return True
def addPMU(self, pmu=None):
pass
@classmethod
def support_take_over(cls):
return True
instTraceFile = Param.String("", "Instruction trace file")
dataTraceFile = Param.String("", "Data dependency trace file")
sizeStoreBuffer = Param.Unsigned(
16, "Number of entries in the store buffer"
)
sizeLoadBuffer = Param.Unsigned(16, "Number of entries in the load buffer")
sizeROB = Param.Unsigned(40, "Number of entries in the re-order buffer")
# Frequency multiplier used to effectively scale the Trace CPU frequency
# either up or down. Note that the Trace CPU's clock domain must also be
# changed when frequency is scaled. A default value of 1.0 means the same
# frequency as was used for generating the traces.
freqMultiplier = Param.Float(
1.0, "Multiplier scale the Trace CPU frequency up or down"
)
# Enable exiting when any one Trace CPU completes execution which is set to
# false by default
enableEarlyExit = Param.Bool(
False, "Exit when any one Trace CPU completes execution"
)
# If progress msg interval is set to a non-zero value, it is treated as
# the interval of committed instructions at which an info message is
# printed.
progressMsgInterval = Param.Unsigned(
0,
"Interval of committed "
"instructions at which to print a"
" progress msg",
)