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# Copyright (c) 2012 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.
#
# Copyright (c) 2005-2008 The Regents of The University of Michigan
# Copyright (c) 2011 Regents of the University of California
# 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: Nathan Binkert
# Rick Strong
# Andreas Hansson
import sys
from m5.defines import buildEnv
from m5.params import *
from m5.proxy import *
from Bus import CoherentBus
from InstTracer import InstTracer
from ExeTracer import ExeTracer
from MemObject import MemObject
default_tracer = ExeTracer()
if buildEnv['TARGET_ISA'] == 'alpha':
from AlphaTLB import AlphaDTB, AlphaITB
from AlphaInterrupts import AlphaInterrupts
from AlphaISA import AlphaISA
isa_class = AlphaISA
elif buildEnv['TARGET_ISA'] == 'sparc':
from SparcTLB import SparcTLB
from SparcInterrupts import SparcInterrupts
from SparcISA import SparcISA
isa_class = SparcISA
elif buildEnv['TARGET_ISA'] == 'x86':
from X86TLB import X86TLB
from X86LocalApic import X86LocalApic
from X86ISA import X86ISA
isa_class = X86ISA
elif buildEnv['TARGET_ISA'] == 'mips':
from MipsTLB import MipsTLB
from MipsInterrupts import MipsInterrupts
from MipsISA import MipsISA
isa_class = MipsISA
elif buildEnv['TARGET_ISA'] == 'arm':
from ArmTLB import ArmTLB
from ArmInterrupts import ArmInterrupts
from ArmISA import ArmISA
isa_class = ArmISA
elif buildEnv['TARGET_ISA'] == 'power':
from PowerTLB import PowerTLB
from PowerInterrupts import PowerInterrupts
from PowerISA import PowerISA
isa_class = PowerISA
class BaseCPU(MemObject):
type = 'BaseCPU'
abstract = True
cxx_header = "cpu/base.hh"
@classmethod
def export_methods(cls, code):
code('''
void switchOut();
void takeOverFrom(BaseCPU *cpu);
bool switchedOut();
void flushTLBs();
''')
def takeOverFrom(self, old_cpu):
self._ccObject.takeOverFrom(old_cpu._ccObject)
system = Param.System(Parent.any, "system object")
cpu_id = Param.Int(-1, "CPU identifier")
numThreads = Param.Unsigned(1, "number of HW thread contexts")
function_trace = Param.Bool(False, "Enable function trace")
function_trace_start = Param.Tick(0, "Tick to start function trace")
checker = Param.BaseCPU(NULL, "checker CPU")
do_checkpoint_insts = Param.Bool(True,
"enable checkpoint pseudo instructions")
do_statistics_insts = Param.Bool(True,
"enable statistics pseudo instructions")
profile = Param.Latency('0ns', "trace the kernel stack")
do_quiesce = Param.Bool(True, "enable quiesce instructions")
workload = VectorParam.Process([], "processes to run")
if buildEnv['TARGET_ISA'] == 'sparc':
dtb = Param.SparcTLB(SparcTLB(), "Data TLB")
itb = Param.SparcTLB(SparcTLB(), "Instruction TLB")
interrupts = Param.SparcInterrupts(
NULL, "Interrupt Controller")
isa = VectorParam.SparcISA([ isa_class() ], "ISA instance")
elif buildEnv['TARGET_ISA'] == 'alpha':
dtb = Param.AlphaTLB(AlphaDTB(), "Data TLB")
itb = Param.AlphaTLB(AlphaITB(), "Instruction TLB")
interrupts = Param.AlphaInterrupts(
NULL, "Interrupt Controller")
isa = VectorParam.AlphaISA([ isa_class() ], "ISA instance")
elif buildEnv['TARGET_ISA'] == 'x86':
dtb = Param.X86TLB(X86TLB(), "Data TLB")
itb = Param.X86TLB(X86TLB(), "Instruction TLB")
interrupts = Param.X86LocalApic(NULL, "Interrupt Controller")
isa = VectorParam.X86ISA([ isa_class() ], "ISA instance")
elif buildEnv['TARGET_ISA'] == 'mips':
dtb = Param.MipsTLB(MipsTLB(), "Data TLB")
itb = Param.MipsTLB(MipsTLB(), "Instruction TLB")
interrupts = Param.MipsInterrupts(
NULL, "Interrupt Controller")
isa = VectorParam.MipsISA([ isa_class() ], "ISA instance")
elif buildEnv['TARGET_ISA'] == 'arm':
dtb = Param.ArmTLB(ArmTLB(), "Data TLB")
itb = Param.ArmTLB(ArmTLB(), "Instruction TLB")
interrupts = Param.ArmInterrupts(
NULL, "Interrupt Controller")
isa = VectorParam.ArmISA([ isa_class() ], "ISA instance")
elif buildEnv['TARGET_ISA'] == 'power':
UnifiedTLB = Param.Bool(True, "Is this a Unified TLB?")
dtb = Param.PowerTLB(PowerTLB(), "Data TLB")
itb = Param.PowerTLB(PowerTLB(), "Instruction TLB")
interrupts = Param.PowerInterrupts(
NULL, "Interrupt Controller")
isa = VectorParam.PowerISA([ isa_class() ], "ISA instance")
else:
print "Don't know what TLB to use for ISA %s" % \
buildEnv['TARGET_ISA']
sys.exit(1)
max_insts_all_threads = Param.Counter(0,
"terminate when all threads have reached this inst count")
max_insts_any_thread = Param.Counter(0,
"terminate when any thread reaches this inst count")
max_loads_all_threads = Param.Counter(0,
"terminate when all threads have reached this load count")
max_loads_any_thread = Param.Counter(0,
"terminate when any thread reaches this load count")
progress_interval = Param.Frequency('0Hz',
"frequency to print out the progress message")
switched_out = Param.Bool(False,
"Leave the CPU switched out after startup (used when switching " \
"between CPU models)")
tracer = Param.InstTracer(default_tracer, "Instruction tracer")
icache_port = MasterPort("Instruction Port")
dcache_port = MasterPort("Data Port")
_cached_ports = ['icache_port', 'dcache_port']
if buildEnv['TARGET_ISA'] in ['x86', 'arm']:
_cached_ports += ["itb.walker.port", "dtb.walker.port"]
_uncached_slave_ports = []
_uncached_master_ports = []
if buildEnv['TARGET_ISA'] == 'x86':
_uncached_slave_ports += ["interrupts.pio", "interrupts.int_slave"]
_uncached_master_ports += ["interrupts.int_master"]
def createInterruptController(self):
if buildEnv['TARGET_ISA'] == 'sparc':
self.interrupts = SparcInterrupts()
elif buildEnv['TARGET_ISA'] == 'alpha':
self.interrupts = AlphaInterrupts()
elif buildEnv['TARGET_ISA'] == 'x86':
_localApic = X86LocalApic(pio_addr=0x2000000000000000)
self.interrupts = _localApic
elif buildEnv['TARGET_ISA'] == 'mips':
self.interrupts = MipsInterrupts()
elif buildEnv['TARGET_ISA'] == 'arm':
self.interrupts = ArmInterrupts()
elif buildEnv['TARGET_ISA'] == 'power':
self.interrupts = PowerInterrupts()
else:
print "Don't know what Interrupt Controller to use for ISA %s" % \
buildEnv['TARGET_ISA']
sys.exit(1)
def connectCachedPorts(self, bus):
for p in self._cached_ports:
exec('self.%s = bus.slave' % p)
def connectUncachedPorts(self, bus):
for p in self._uncached_slave_ports:
exec('self.%s = bus.master' % p)
for p in self._uncached_master_ports:
exec('self.%s = bus.slave' % p)
def connectAllPorts(self, cached_bus, uncached_bus = None):
self.connectCachedPorts(cached_bus)
if not uncached_bus:
uncached_bus = cached_bus
self.connectUncachedPorts(uncached_bus)
def addPrivateSplitL1Caches(self, ic, dc, iwc = None, dwc = None):
self.icache = ic
self.dcache = dc
self.icache_port = ic.cpu_side
self.dcache_port = dc.cpu_side
self._cached_ports = ['icache.mem_side', 'dcache.mem_side']
if buildEnv['TARGET_ISA'] in ['x86', 'arm']:
if iwc and dwc:
self.itb_walker_cache = iwc
self.dtb_walker_cache = dwc
self.itb.walker.port = iwc.cpu_side
self.dtb.walker.port = dwc.cpu_side
self._cached_ports += ["itb_walker_cache.mem_side", \
"dtb_walker_cache.mem_side"]
else:
self._cached_ports += ["itb.walker.port", "dtb.walker.port"]
# Checker doesn't need its own tlb caches because it does
# functional accesses only
if self.checker != NULL:
self._cached_ports += ["checker.itb.walker.port", \
"checker.dtb.walker.port"]
def addTwoLevelCacheHierarchy(self, ic, dc, l2c, iwc = None, dwc = None):
self.addPrivateSplitL1Caches(ic, dc, iwc, dwc)
# Override the default bus clock of 1 GHz and uses the CPU
# clock for the L1-to-L2 bus, and also set a width of 32 bytes
# (256-bits), which is four times that of the default bus.
self.toL2Bus = CoherentBus(clock = Parent.clock, width = 32)
self.connectCachedPorts(self.toL2Bus)
self.l2cache = l2c
self.toL2Bus.master = self.l2cache.cpu_side
self._cached_ports = ['l2cache.mem_side']
def createThreads(self):
self.isa = [ isa_class() for i in xrange(self.numThreads) ]
if self.checker != NULL:
self.checker.createThreads()
def addCheckerCpu(self):
pass
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