config: Move core timing models to config/common/cores

Change-Id: I189b6462cc64f7cc6c1b7a6c2af1abb60e1854de
Signed-off-by: Andreas Sandberg <andreas.sandberg@arm.com>
Reviewed-by: Gabor Dozsa <gabor.dozsa@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/3943
Reviewed-by: Jason Lowe-Power <jason@lowepower.com>
Maintainer: Jason Lowe-Power <jason@lowepower.com>

5 files changed, 625 insertions, 0 deletions

diff --git a/configs/common/cores/__init__.py b/configs/common/cores/__init__.py
new file mode 100644
index 000000000..7a2173eab
--- /dev/null
+++ b/configs/common/cores/__init__.py
@@ -0,0 +1,36 @@
+# Copyright (c) 2017 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
+# unmodified and in its entirety in all distributions of the software,
+# modified or unmodified, in source code or in binary form.
+#
+# 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: Andreas Sandberg
diff --git a/configs/common/cores/arm/O3_ARM_v7a.py b/configs/common/cores/arm/O3_ARM_v7a.py
new file mode 100644
index 000000000..f5c2c711a
--- /dev/null
+++ b/configs/common/cores/arm/O3_ARM_v7a.py
@@ -0,0 +1,203 @@
+# Copyright (c) 2012 The Regents of The University of Michigan
+# 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
+
+
+from m5.objects import *
+
+# Simple ALU Instructions have a latency of 1
+class O3_ARM_v7a_Simple_Int(FUDesc):
+    opList = [ OpDesc(opClass='IntAlu', opLat=1) ]
+    count = 2
+
+# Complex ALU instructions have a variable latencies
+class O3_ARM_v7a_Complex_Int(FUDesc):
+    opList = [ OpDesc(opClass='IntMult', opLat=3, pipelined=True),
+               OpDesc(opClass='IntDiv', opLat=12, pipelined=False),
+               OpDesc(opClass='IprAccess', opLat=3, pipelined=True) ]
+    count = 1
+
+
+# Floating point and SIMD instructions
+class O3_ARM_v7a_FP(FUDesc):
+    opList = [ OpDesc(opClass='SimdAdd', opLat=4),
+               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=5),
+               OpDesc(opClass='SimdMultAcc',opLat=5),
+               OpDesc(opClass='SimdShift',opLat=3),
+               OpDesc(opClass='SimdShiftAcc', opLat=3),
+               OpDesc(opClass='SimdSqrt', opLat=9),
+               OpDesc(opClass='SimdFloatAdd',opLat=5),
+               OpDesc(opClass='SimdFloatAlu',opLat=5),
+               OpDesc(opClass='SimdFloatCmp', opLat=3),
+               OpDesc(opClass='SimdFloatCvt', opLat=3),
+               OpDesc(opClass='SimdFloatDiv', opLat=3),
+               OpDesc(opClass='SimdFloatMisc', opLat=3),
+               OpDesc(opClass='SimdFloatMult', opLat=3),
+               OpDesc(opClass='SimdFloatMultAcc',opLat=5),
+               OpDesc(opClass='SimdFloatSqrt', opLat=9),
+               OpDesc(opClass='FloatAdd', opLat=5),
+               OpDesc(opClass='FloatCmp', opLat=5),
+               OpDesc(opClass='FloatCvt', opLat=5),
+               OpDesc(opClass='FloatDiv', opLat=9, pipelined=False),
+               OpDesc(opClass='FloatSqrt', opLat=33, pipelined=False),
+               OpDesc(opClass='FloatMult', opLat=4),
+               OpDesc(opClass='FloatMultAcc', opLat=5),
+               OpDesc(opClass='FloatMisc', opLat=3) ]
+    count = 2
+
+
+# Load/Store Units
+class O3_ARM_v7a_Load(FUDesc):
+    opList = [ OpDesc(opClass='MemRead',opLat=2),
+               OpDesc(opClass='FloatMemRead',opLat=2) ]
+    count = 1
+
+class O3_ARM_v7a_Store(FUDesc):
+    opList = [ OpDesc(opClass='MemWrite',opLat=2),
+               OpDesc(opClass='FloatMemWrite',opLat=2) ]
+    count = 1
+
+# Functional Units for this CPU
+class O3_ARM_v7a_FUP(FUPool):
+    FUList = [O3_ARM_v7a_Simple_Int(), O3_ARM_v7a_Complex_Int(),
+              O3_ARM_v7a_Load(), O3_ARM_v7a_Store(), O3_ARM_v7a_FP()]
+
+# Bi-Mode Branch Predictor
+class O3_ARM_v7a_BP(BiModeBP):
+    globalPredictorSize = 8192
+    globalCtrBits = 2
+    choicePredictorSize = 8192
+    choiceCtrBits = 2
+    BTBEntries = 2048
+    BTBTagSize = 18
+    RASSize = 16
+    instShiftAmt = 2
+
+class O3_ARM_v7a_3(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 = O3_ARM_v7a_FUP()
+    iewToCommitDelay = 1
+    renameToROBDelay = 1
+    commitWidth = 8
+    squashWidth = 8
+    trapLatency = 13
+    backComSize = 5
+    forwardComSize = 5
+    numPhysIntRegs = 128
+    numPhysFloatRegs = 192
+    numIQEntries = 32
+    numROBEntries = 40
+
+    switched_out = False
+    branchPred = O3_ARM_v7a_BP()
+
+# Instruction Cache
+class O3_ARM_v7a_ICache(Cache):
+    tag_latency = 1
+    data_latency = 1
+    response_latency = 1
+    mshrs = 2
+    tgts_per_mshr = 8
+    size = '32kB'
+    assoc = 2
+    is_read_only = True
+    # Writeback clean lines as well
+    writeback_clean = True
+
+# Data Cache
+class O3_ARM_v7a_DCache(Cache):
+    tag_latency = 2
+    data_latency = 2
+    response_latency = 2
+    mshrs = 6
+    tgts_per_mshr = 8
+    size = '32kB'
+    assoc = 2
+    write_buffers = 16
+    # Consider the L2 a victim cache also for clean lines
+    writeback_clean = True
+
+# TLB Cache
+# Use a cache as a L2 TLB
+class O3_ARM_v7aWalkCache(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 O3_ARM_v7aL2(Cache):
+    tag_latency = 12
+    data_latency = 12
+    response_latency = 12
+    mshrs = 16
+    tgts_per_mshr = 8
+    size = '1MB'
+    assoc = 16
+    write_buffers = 8
+    prefetch_on_access = True
+    clusivity = 'mostly_excl'
+    # Simple stride prefetcher
+    prefetcher = StridePrefetcher(degree=8, latency = 1)
+    tags = RandomRepl()
diff --git a/configs/common/cores/arm/__init__.py b/configs/common/cores/arm/__init__.py
new file mode 100644
index 000000000..7a2173eab
--- /dev/null
+++ b/configs/common/cores/arm/__init__.py
@@ -0,0 +1,36 @@
+# Copyright (c) 2017 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
+# unmodified and in its entirety in all distributions of the software,
+# modified or unmodified, in source code or in binary form.
+#
+# 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: Andreas Sandberg
diff --git a/configs/common/cores/arm/ex5_LITTLE.py b/configs/common/cores/arm/ex5_LITTLE.py
new file mode 100644
index 000000000..a866b167b
--- /dev/null
+++ b/configs/common/cores/arm/ex5_LITTLE.py
@@ -0,0 +1,150 @@
+# 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 LITTLE core (based on the ARM Cortex-A7)
+#-----------------------------------------------------------------------
+
+# Simple ALU Instructions have a latency of 3
+class ex5_LITTLE_Simple_Int(MinorDefaultIntFU):
+    opList = [ OpDesc(opClass='IntAlu', opLat=4) ]
+
+# Complex ALU instructions have a variable latencies
+class ex5_LITTLE_Complex_IntMul(MinorDefaultIntMulFU):
+    opList = [ OpDesc(opClass='IntMult', opLat=7) ]
+
+class ex5_LITTLE_Complex_IntDiv(MinorDefaultIntDivFU):
+    opList = [ OpDesc(opClass='IntDiv', opLat=9) ]
+
+# Floating point and SIMD instructions
+class ex5_LITTLE_FP(MinorDefaultFloatSimdFU):
+    opList = [ OpDesc(opClass='SimdAdd', opLat=6),
+               OpDesc(opClass='SimdAddAcc', opLat=4),
+               OpDesc(opClass='SimdAlu', opLat=4),
+               OpDesc(opClass='SimdCmp', opLat=1),
+               OpDesc(opClass='SimdCvt', opLat=3),
+               OpDesc(opClass='SimdMisc', opLat=3),
+               OpDesc(opClass='SimdMult',opLat=4),
+               OpDesc(opClass='SimdMultAcc',opLat=5),
+               OpDesc(opClass='SimdShift',opLat=3),
+               OpDesc(opClass='SimdShiftAcc', opLat=3),
+               OpDesc(opClass='SimdSqrt', opLat=9),
+               OpDesc(opClass='SimdFloatAdd',opLat=8),
+               OpDesc(opClass='SimdFloatAlu',opLat=6),
+               OpDesc(opClass='SimdFloatCmp', opLat=6),
+               OpDesc(opClass='SimdFloatCvt', opLat=6),
+               OpDesc(opClass='SimdFloatDiv', opLat=20, pipelined=False),
+               OpDesc(opClass='SimdFloatMisc', opLat=6),
+               OpDesc(opClass='SimdFloatMult', opLat=15),
+               OpDesc(opClass='SimdFloatMultAcc',opLat=6),
+               OpDesc(opClass='SimdFloatSqrt', opLat=17),
+               OpDesc(opClass='FloatAdd', opLat=8),
+               OpDesc(opClass='FloatCmp', opLat=6),
+               OpDesc(opClass='FloatCvt', opLat=6),
+               OpDesc(opClass='FloatDiv', opLat=15, pipelined=False),
+               OpDesc(opClass='FloatSqrt', opLat=33),
+               OpDesc(opClass='FloatMult', opLat=6) ]
+
+# Load/Store Units
+class ex5_LITTLE_MemFU(MinorDefaultMemFU):
+    opList = [ OpDesc(opClass='MemRead',opLat=1),
+               OpDesc(opClass='MemWrite',opLat=1) ]
+
+# Misc Unit
+class ex5_LITTLE_MiscFU(MinorDefaultMiscFU):
+    opList = [ OpDesc(opClass='IprAccess',opLat=1),
+               OpDesc(opClass='InstPrefetch',opLat=1) ]
+
+# Functional Units for this CPU
+class ex5_LITTLE_FUP(MinorFUPool):
+    funcUnits = [ex5_LITTLE_Simple_Int(), ex5_LITTLE_Simple_Int(),
+        ex5_LITTLE_Complex_IntMul(), ex5_LITTLE_Complex_IntDiv(),
+        ex5_LITTLE_FP(), ex5_LITTLE_MemFU(),
+        ex5_LITTLE_MiscFU()]
+
+class ex5_LITTLE(MinorCPU):
+    executeFuncUnits = ex5_LITTLE_FUP()
+
+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
+
+class L1I(L1Cache):
+    mshrs = 2
+    size = '32kB'
+    assoc = 2
+    is_read_only = True
+    tgts_per_mshr = 20
+
+class L1D(L1Cache):
+    mshrs = 4
+    size = '32kB'
+    assoc = 4
+    write_buffers = 4
+
+# TLB Cache
+# Use a cache as a L2 TLB
+class WalkCache(Cache):
+    tag_latency = 2
+    data_latency = 2
+    response_latency = 2
+    mshrs = 6
+    tgts_per_mshr = 8
+    size = '1kB'
+    assoc = 2
+    write_buffers = 16
+    is_read_only = True
+    # Writeback clean lines as well
+    writeback_clean = True
+
+# L2 Cache
+class L2(Cache):
+    tag_latency = 9
+    data_latency = 9
+    response_latency = 9
+    mshrs = 8
+    tgts_per_mshr = 12
+    size = '512kB'
+    assoc = 8
+    write_buffers = 16
+    prefetch_on_access = True
+    clusivity = 'mostly_excl'
+    # Simple stride prefetcher
+    prefetcher = StridePrefetcher(degree=1, latency = 1)
+    tags = RandomRepl()
+
+
diff --git a/configs/common/cores/arm/ex5_big.py b/configs/common/cores/arm/ex5_big.py
new file mode 100644
index 000000000..f4ca04740
--- /dev/null
+++ b/configs/common/cores/arm/ex5_big.py
@@ -0,0 +1,200 @@
+# 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 = RandomRepl()