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7d71f6641fcb660de0f003e2c028b464d7116ca1
gem5/src/cpu/BaseCPU.py
Andreas Sandberg 7d71f6641f python: Make iterator handling Python 3 compatible 
Many functions that used to return lists (e.g., dict.items()) now
return iterators and their iterator counterparts (e.g.,
dict.iteritems()) have been removed. Switch calls to the Python 2.7
iterator methods to use the Python 3 equivalent and add explicit list
conversions where necessary.

Change-Id: I0c18114955af8f4932d81fb689a0adb939dafaba
Signed-off-by: Andreas Sandberg <andreas.sandberg@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/c/15992
Reviewed-by: Juha Jäykkä <juha.jaykka@arm.com>
Reviewed-by: Jason Lowe-Power <jason@lowepower.com>
2019-02-22 10:47:36 +00:00

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# Copyright (c) 2012-2013, 2015-2017 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.
#
# 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
# Glenn Bergmans
from __future__ import print_function
import sys
from m5.SimObject import *
from m5.defines import buildEnv
from m5.params import *
from m5.proxy import *
from m5.util.fdthelper import *
from m5.objects.XBar import L2XBar
from m5.objects.InstTracer import InstTracer
from m5.objects.CPUTracers import ExeTracer
from m5.objects.MemObject import MemObject
from m5.objects.SubSystem import SubSystem
from m5.objects.ClockDomain import *
from m5.objects.Platform import Platform
default_tracer = ExeTracer()
if buildEnv['TARGET_ISA'] == 'alpha':
from m5.objects.AlphaTLB import AlphaDTB as ArchDTB, AlphaITB as ArchITB
from m5.objects.AlphaInterrupts import AlphaInterrupts
from m5.objects.AlphaISA import AlphaISA
default_isa_class = AlphaISA
elif buildEnv['TARGET_ISA'] == 'sparc':
from m5.objects.SparcTLB import SparcTLB as ArchDTB, SparcTLB as ArchITB
from m5.objects.SparcInterrupts import SparcInterrupts
from m5.objects.SparcISA import SparcISA
default_isa_class = SparcISA
elif buildEnv['TARGET_ISA'] == 'x86':
from m5.objects.X86TLB import X86TLB as ArchDTB, X86TLB as ArchITB
from m5.objects.X86LocalApic import X86LocalApic
from m5.objects.X86ISA import X86ISA
default_isa_class = X86ISA
elif buildEnv['TARGET_ISA'] == 'mips':
from m5.objects.MipsTLB import MipsTLB as ArchDTB, MipsTLB as ArchITB
from m5.objects.MipsInterrupts import MipsInterrupts
from m5.objects.MipsISA import MipsISA
default_isa_class = MipsISA
elif buildEnv['TARGET_ISA'] == 'arm':
from m5.objects.ArmTLB import ArmTLB as ArchDTB, ArmTLB as ArchITB
from m5.objects.ArmTLB import ArmStage2IMMU, ArmStage2DMMU
from m5.objects.ArmInterrupts import ArmInterrupts
from m5.objects.ArmISA import ArmISA
default_isa_class = ArmISA
elif buildEnv['TARGET_ISA'] == 'power':
from m5.objects.PowerTLB import PowerTLB as ArchDTB, PowerTLB as ArchITB
from m5.objects.PowerInterrupts import PowerInterrupts
from m5.objects.PowerISA import PowerISA
default_isa_class = PowerISA
elif buildEnv['TARGET_ISA'] == 'riscv':
from m5.objects.RiscvTLB import RiscvTLB as ArchDTB, RiscvTLB as ArchITB
from m5.objects.RiscvInterrupts import RiscvInterrupts
from m5.objects.RiscvISA import RiscvISA
default_isa_class = RiscvISA
class BaseCPU(MemObject):
type = 'BaseCPU'
abstract = True
cxx_header = "cpu/base.hh"
cxx_exports = [
PyBindMethod("switchOut"),
PyBindMethod("takeOverFrom"),
PyBindMethod("switchedOut"),
PyBindMethod("flushTLBs"),
PyBindMethod("totalInsts"),
PyBindMethod("scheduleInstStop"),
PyBindMethod("scheduleLoadStop"),
PyBindMethod("getCurrentInstCount"),
]
@classmethod
def memory_mode(cls):
"""Which memory mode does this CPU require?"""
return 'invalid'
@classmethod
def require_caches(cls):
"""Does the CPU model require caches?
Some CPU models might make assumptions that require them to
have caches.
"""
return False
@classmethod
def support_take_over(cls):
"""Does the CPU model support CPU takeOverFrom?"""
return False
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")
socket_id = Param.Unsigned(0, "Physical Socket identifier")
numThreads = Param.Unsigned(1, "number of HW thread contexts")
pwr_gating_latency = Param.Cycles(300,
"Latency to enter power gating state when all contexts are suspended")
power_gating_on_idle = Param.Bool(False, "Control whether the core goes "\
"to the OFF power state after all thread are disabled for "\
"pwr_gating_latency cycles")
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")
syscallRetryLatency = Param.Cycles(10000, "Cycles to wait until retry")
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")
wait_for_remote_gdb = Param.Bool(False,
"Wait for a remote GDB connection");
workload = VectorParam.Process([], "processes to run")
dtb = Param.BaseTLB(ArchDTB(), "Data TLB")
itb = Param.BaseTLB(ArchITB(), "Instruction TLB")
if buildEnv['TARGET_ISA'] == 'sparc':
interrupts = VectorParam.SparcInterrupts(
[], "Interrupt Controller")
isa = VectorParam.SparcISA([], "ISA instance")
elif buildEnv['TARGET_ISA'] == 'alpha':
interrupts = VectorParam.AlphaInterrupts(
[], "Interrupt Controller")
isa = VectorParam.AlphaISA([], "ISA instance")
elif buildEnv['TARGET_ISA'] == 'x86':
interrupts = VectorParam.X86LocalApic([], "Interrupt Controller")
isa = VectorParam.X86ISA([], "ISA instance")
elif buildEnv['TARGET_ISA'] == 'mips':
interrupts = VectorParam.MipsInterrupts(
[], "Interrupt Controller")
isa = VectorParam.MipsISA([], "ISA instance")
elif buildEnv['TARGET_ISA'] == 'arm':
istage2_mmu = Param.ArmStage2MMU(ArmStage2IMMU(), "Stage 2 trans")
dstage2_mmu = Param.ArmStage2MMU(ArmStage2DMMU(), "Stage 2 trans")
interrupts = VectorParam.ArmInterrupts(
[], "Interrupt Controller")
isa = VectorParam.ArmISA([], "ISA instance")
elif buildEnv['TARGET_ISA'] == 'power':
UnifiedTLB = Param.Bool(True, "Is this a Unified TLB?")
interrupts = VectorParam.PowerInterrupts(
[], "Interrupt Controller")
isa = VectorParam.PowerISA([], "ISA instance")
elif buildEnv['TARGET_ISA'] == 'riscv':
interrupts = VectorParam.RiscvInterrupts(
[], "Interrupt Controller")
isa = VectorParam.RiscvISA([], "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")
simpoint_start_insts = VectorParam.Counter([],
"starting instruction counts of simpoints")
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[0].pio",
"interrupts[0].int_slave"]
_uncached_master_ports += ["interrupts[0].int_master"]
def createInterruptController(self):
if buildEnv['TARGET_ISA'] == 'sparc':
self.interrupts = [SparcInterrupts() for i in range(self.numThreads)]
elif buildEnv['TARGET_ISA'] == 'alpha':
self.interrupts = [AlphaInterrupts() for i in range(self.numThreads)]
elif buildEnv['TARGET_ISA'] == 'x86':
self.apic_clk_domain = DerivedClockDomain(clk_domain =
Parent.clk_domain,
clk_divider = 16)
self.interrupts = [X86LocalApic(clk_domain = self.apic_clk_domain,
pio_addr=0x2000000000000000)
for i in range(self.numThreads)]
_localApic = self.interrupts
elif buildEnv['TARGET_ISA'] == 'mips':
self.interrupts = [MipsInterrupts() for i in range(self.numThreads)]
elif buildEnv['TARGET_ISA'] == 'arm':
self.interrupts = [ArmInterrupts() for i in range(self.numThreads)]
elif buildEnv['TARGET_ISA'] == 'power':
self.interrupts = [PowerInterrupts() for i in range(self.numThreads)]
elif buildEnv['TARGET_ISA'] == 'riscv':
self.interrupts = \
[RiscvInterrupts() for i in range(self.numThreads)]
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,
xbar=None):
self.addPrivateSplitL1Caches(ic, dc, iwc, dwc)
self.toL2Bus = xbar if xbar else L2XBar()
self.connectCachedPorts(self.toL2Bus)
self.l2cache = l2c
self.toL2Bus.master = self.l2cache.cpu_side
self._cached_ports = ['l2cache.mem_side']
def createThreads(self):
# If no ISAs have been created, assume that the user wants the
# default ISA.
if len(self.isa) == 0:
self.isa = [ default_isa_class() for i in range(self.numThreads) ]
else:
if len(self.isa) != int(self.numThreads):
raise RuntimeError("Number of ISA instances doesn't "
"match thread count")
if self.checker != NULL:
self.checker.createThreads()
def addCheckerCpu(self):
pass
def createPhandleKey(self, thread):
# This method creates a unique key for this cpu as a function of a
# certain thread
return 'CPU-%d-%d-%d' % (self.socket_id, self.cpu_id, thread)
#Generate simple CPU Device Tree structure
def generateDeviceTree(self, state):
"""Generate cpu nodes for each thread and the corresponding part of the
cpu-map node. Note that this implementation does not support clusters
of clusters. Note that GEM5 is not compatible with the official way of
numbering cores as defined in the Device Tree documentation. Where the
cpu_id needs to reset to 0 for each cluster by specification, GEM5
expects the cpu_id to be globally unique and incremental. This
generated node adheres the GEM5 way of doing things."""
if bool(self.switched_out):
return
cpus_node = FdtNode('cpus')
cpus_node.append(state.CPUCellsProperty())
#Special size override of 0
cpus_node.append(FdtPropertyWords('#size-cells', [0]))
# Generate cpu nodes
for i in range(int(self.numThreads)):
reg = (int(self.socket_id)<<8) + int(self.cpu_id) + i
node = FdtNode("cpu@%x" % reg)
node.append(FdtPropertyStrings("device_type", "cpu"))
node.appendCompatible(["gem5,arm-cpu"])
node.append(FdtPropertyWords("reg", state.CPUAddrCells(reg)))
platform, found = self.system.unproxy(self).find_any(Platform)
if found:
platform.annotateCpuDeviceNode(node, state)
else:
warn("Platform not found for device tree generation; " \
"system or multiple CPUs may not start")
freq = round(self.clk_domain.unproxy(self).clock[0].frequency)
node.append(FdtPropertyWords("clock-frequency", freq))
# Unique key for this CPU
phandle_key = self.createPhandleKey(i)
node.appendPhandle(phandle_key)
cpus_node.append(node)
yield cpus_node
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