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# Copyright (c) 2007 MIPS Technologies, Inc.
# 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: Korey Sewell
from m5.params import *
from m5.proxy import *
from BaseCPU import BaseCPU
class ThreadModel(Enum):
vals = ['Single', 'SMT', 'SwitchOnCacheMiss']
class InOrderCPU(BaseCPU):
type = 'InOrderCPU'
activity = Param.Unsigned(0, "Initial count")
threadModel = Param.ThreadModel('SMT', "Multithreading model (SE-MODE only)")
cachePorts = Param.Unsigned(2, "Cache Ports")
stageWidth = Param.Unsigned(4, "Stage width")
fetchMemPort = Param.String("icache_port" , "Name of Memory Port to get instructions from")
dataMemPort = Param.String("dcache_port" , "Name of Memory Port to get data from")
icache_port = Port("Instruction Port")
dcache_port = Port("Data Port")
_cached_ports = ['icache_port', 'dcache_port']
fetchBuffSize = Param.Unsigned(4, "Fetch Buffer Size (Number of Cache Blocks Stored)")
memBlockSize = Param.Unsigned(64, "Memory Block Size")
predType = Param.String("tournament", "Branch predictor type ('local', 'tournament')")
localPredictorSize = Param.Unsigned(2048, "Size of local predictor")
localCtrBits = Param.Unsigned(2, "Bits per counter")
localHistoryTableSize = Param.Unsigned(2048, "Size of local history table")
localHistoryBits = Param.Unsigned(11, "Bits for the local history")
globalPredictorSize = Param.Unsigned(8192, "Size of global predictor")
globalCtrBits = Param.Unsigned(2, "Bits per counter")
globalHistoryBits = Param.Unsigned(13, "Bits of history")
choicePredictorSize = Param.Unsigned(8192, "Size of choice predictor")
choiceCtrBits = Param.Unsigned(2, "Bits of choice counters")
BTBEntries = Param.Unsigned(4096, "Number of BTB entries")
BTBTagSize = Param.Unsigned(16, "Size of the BTB tags, in bits")
RASSize = Param.Unsigned(16, "RAS size")
instShiftAmt = Param.Unsigned(2, "Number of bits to shift instructions by")
functionTrace = Param.Bool(False, "Enable function trace")
functionTraceStart = Param.Tick(0, "Cycle to start function trace")
stageTracing = Param.Bool(False, "Enable tracing of each stage in CPU")
multLatency = Param.Unsigned(1, "Latency for Multiply Operations")
multRepeatRate = Param.Unsigned(1, "Repeat Rate for Multiply Operations")
div8Latency = Param.Unsigned(1, "Latency for 8-bit Divide Operations")
div8RepeatRate = Param.Unsigned(1, "Repeat Rate for 8-bit Divide Operations")
div16Latency = Param.Unsigned(1, "Latency for 16-bit Divide Operations")
div16RepeatRate = Param.Unsigned(1, "Repeat Rate for 16-bit Divide Operations")
div24Latency = Param.Unsigned(1, "Latency for 24-bit Divide Operations")
div24RepeatRate = Param.Unsigned(1, "Repeat Rate for 24-bit Divide Operations")
div32Latency = Param.Unsigned(1, "Latency for 32-bit Divide Operations")
div32RepeatRate = Param.Unsigned(1, "Repeat Rate for 32-bit Divide Operations")
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