3db3f83a5e
The ISA class on stores the contents of ID registers on many architectures. In order to make reset values of such registers configurable, we make the class inherit from SimObject, which allows us to use the normal generated parameter headers. This patch introduces a Python helper method, BaseCPU.createThreads(), which creates a set of ISAs for each of the threads in an SMT system. Although it is currently only needed when creating multi-threaded CPUs, it should always be called before instantiating the system as this is an obvious place to configure ID registers identifying a thread/CPU.
269 lines
11 KiB
Python
269 lines
11 KiB
Python
# Copyright (c) 2012 ARM Limited
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# All rights reserved.
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#
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# The license below extends only to copyright in the software and shall
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# not be construed as granting a license to any other intellectual
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# property including but not limited to intellectual property relating
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# to a hardware implementation of the functionality of the software
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# licensed hereunder. You may use the software subject to the license
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# terms below provided that you ensure that this notice is replicated
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# unmodified and in its entirety in all distributions of the software,
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# modified or unmodified, in source code or in binary form.
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#
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# Copyright (c) 2005-2008 The Regents of The University of Michigan
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# Copyright (c) 2011 Regents of the University of California
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions are
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# met: redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer;
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# redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution;
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# neither the name of the copyright holders nor the names of its
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# contributors may be used to endorse or promote products derived from
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# this software without specific prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#
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# Authors: Nathan Binkert
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# Rick Strong
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# Andreas Hansson
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import sys
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from m5.defines import buildEnv
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from m5.params import *
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from m5.proxy import *
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from Bus import CoherentBus
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from InstTracer import InstTracer
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from ExeTracer import ExeTracer
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from MemObject import MemObject
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default_tracer = ExeTracer()
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if buildEnv['TARGET_ISA'] == 'alpha':
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from AlphaTLB import AlphaDTB, AlphaITB
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from AlphaInterrupts import AlphaInterrupts
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from AlphaISA import AlphaISA
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isa_class = AlphaISA
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elif buildEnv['TARGET_ISA'] == 'sparc':
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from SparcTLB import SparcTLB
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from SparcInterrupts import SparcInterrupts
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from SparcISA import SparcISA
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isa_class = SparcISA
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elif buildEnv['TARGET_ISA'] == 'x86':
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from X86TLB import X86TLB
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from X86LocalApic import X86LocalApic
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from X86ISA import X86ISA
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isa_class = X86ISA
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elif buildEnv['TARGET_ISA'] == 'mips':
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from MipsTLB import MipsTLB
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from MipsInterrupts import MipsInterrupts
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from MipsISA import MipsISA
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isa_class = MipsISA
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elif buildEnv['TARGET_ISA'] == 'arm':
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from ArmTLB import ArmTLB
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from ArmInterrupts import ArmInterrupts
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from ArmISA import ArmISA
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isa_class = ArmISA
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elif buildEnv['TARGET_ISA'] == 'power':
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from PowerTLB import PowerTLB
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from PowerInterrupts import PowerInterrupts
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from PowerISA import PowerISA
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isa_class = PowerISA
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class BaseCPU(MemObject):
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type = 'BaseCPU'
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abstract = True
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cxx_header = "cpu/base.hh"
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@classmethod
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def export_methods(cls, code):
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code('''
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void switchOut();
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void takeOverFrom(BaseCPU *cpu);
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''')
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def takeOverFrom(self, old_cpu):
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self._ccObject.takeOverFrom(old_cpu._ccObject)
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system = Param.System(Parent.any, "system object")
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cpu_id = Param.Int(-1, "CPU identifier")
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numThreads = Param.Unsigned(1, "number of HW thread contexts")
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function_trace = Param.Bool(False, "Enable function trace")
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function_trace_start = Param.Tick(0, "Tick to start function trace")
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checker = Param.BaseCPU(NULL, "checker CPU")
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do_checkpoint_insts = Param.Bool(True,
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"enable checkpoint pseudo instructions")
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do_statistics_insts = Param.Bool(True,
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"enable statistics pseudo instructions")
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profile = Param.Latency('0ns', "trace the kernel stack")
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do_quiesce = Param.Bool(True, "enable quiesce instructions")
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workload = VectorParam.Process([], "processes to run")
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if buildEnv['TARGET_ISA'] == 'sparc':
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dtb = Param.SparcTLB(SparcTLB(), "Data TLB")
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itb = Param.SparcTLB(SparcTLB(), "Instruction TLB")
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interrupts = Param.SparcInterrupts(
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NULL, "Interrupt Controller")
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isa = VectorParam.SparcISA([ isa_class() ], "ISA instance")
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elif buildEnv['TARGET_ISA'] == 'alpha':
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dtb = Param.AlphaTLB(AlphaDTB(), "Data TLB")
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itb = Param.AlphaTLB(AlphaITB(), "Instruction TLB")
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interrupts = Param.AlphaInterrupts(
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NULL, "Interrupt Controller")
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isa = VectorParam.AlphaISA([ isa_class() ], "ISA instance")
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elif buildEnv['TARGET_ISA'] == 'x86':
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dtb = Param.X86TLB(X86TLB(), "Data TLB")
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itb = Param.X86TLB(X86TLB(), "Instruction TLB")
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interrupts = Param.X86LocalApic(NULL, "Interrupt Controller")
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isa = VectorParam.X86ISA([ isa_class() ], "ISA instance")
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elif buildEnv['TARGET_ISA'] == 'mips':
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dtb = Param.MipsTLB(MipsTLB(), "Data TLB")
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itb = Param.MipsTLB(MipsTLB(), "Instruction TLB")
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interrupts = Param.MipsInterrupts(
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NULL, "Interrupt Controller")
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isa = VectorParam.MipsISA([ isa_class() ], "ISA instance")
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elif buildEnv['TARGET_ISA'] == 'arm':
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dtb = Param.ArmTLB(ArmTLB(), "Data TLB")
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itb = Param.ArmTLB(ArmTLB(), "Instruction TLB")
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interrupts = Param.ArmInterrupts(
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NULL, "Interrupt Controller")
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isa = VectorParam.ArmISA([ isa_class() ], "ISA instance")
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elif buildEnv['TARGET_ISA'] == 'power':
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UnifiedTLB = Param.Bool(True, "Is this a Unified TLB?")
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dtb = Param.PowerTLB(PowerTLB(), "Data TLB")
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itb = Param.PowerTLB(PowerTLB(), "Instruction TLB")
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interrupts = Param.PowerInterrupts(
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NULL, "Interrupt Controller")
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isa = VectorParam.PowerISA([ isa_class() ], "ISA instance")
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else:
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print "Don't know what TLB to use for ISA %s" % \
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buildEnv['TARGET_ISA']
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sys.exit(1)
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max_insts_all_threads = Param.Counter(0,
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"terminate when all threads have reached this inst count")
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max_insts_any_thread = Param.Counter(0,
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"terminate when any thread reaches this inst count")
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max_loads_all_threads = Param.Counter(0,
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"terminate when all threads have reached this load count")
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max_loads_any_thread = Param.Counter(0,
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"terminate when any thread reaches this load count")
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progress_interval = Param.Frequency('0Hz',
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"frequency to print out the progress message")
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defer_registration = Param.Bool(False,
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"defer registration with system (for sampling)")
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tracer = Param.InstTracer(default_tracer, "Instruction tracer")
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icache_port = MasterPort("Instruction Port")
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dcache_port = MasterPort("Data Port")
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_cached_ports = ['icache_port', 'dcache_port']
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if buildEnv['TARGET_ISA'] in ['x86', 'arm']:
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_cached_ports += ["itb.walker.port", "dtb.walker.port"]
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_uncached_slave_ports = []
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_uncached_master_ports = []
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if buildEnv['TARGET_ISA'] == 'x86':
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_uncached_slave_ports += ["interrupts.pio", "interrupts.int_slave"]
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_uncached_master_ports += ["interrupts.int_master"]
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def createInterruptController(self):
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if buildEnv['TARGET_ISA'] == 'sparc':
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self.interrupts = SparcInterrupts()
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elif buildEnv['TARGET_ISA'] == 'alpha':
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self.interrupts = AlphaInterrupts()
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elif buildEnv['TARGET_ISA'] == 'x86':
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_localApic = X86LocalApic(pio_addr=0x2000000000000000)
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self.interrupts = _localApic
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elif buildEnv['TARGET_ISA'] == 'mips':
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self.interrupts = MipsInterrupts()
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elif buildEnv['TARGET_ISA'] == 'arm':
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self.interrupts = ArmInterrupts()
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elif buildEnv['TARGET_ISA'] == 'power':
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self.interrupts = PowerInterrupts()
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else:
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print "Don't know what Interrupt Controller to use for ISA %s" % \
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buildEnv['TARGET_ISA']
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sys.exit(1)
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def connectCachedPorts(self, bus):
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for p in self._cached_ports:
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exec('self.%s = bus.slave' % p)
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def connectUncachedPorts(self, bus):
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for p in self._uncached_slave_ports:
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exec('self.%s = bus.master' % p)
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for p in self._uncached_master_ports:
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exec('self.%s = bus.slave' % p)
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def connectAllPorts(self, cached_bus, uncached_bus = None):
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self.connectCachedPorts(cached_bus)
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if not uncached_bus:
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uncached_bus = cached_bus
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self.connectUncachedPorts(uncached_bus)
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def addPrivateSplitL1Caches(self, ic, dc, iwc = None, dwc = None):
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self.icache = ic
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self.dcache = dc
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self.icache_port = ic.cpu_side
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self.dcache_port = dc.cpu_side
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self._cached_ports = ['icache.mem_side', 'dcache.mem_side']
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if buildEnv['TARGET_ISA'] in ['x86', 'arm']:
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if iwc and dwc:
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self.itb_walker_cache = iwc
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self.dtb_walker_cache = dwc
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self.itb.walker.port = iwc.cpu_side
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self.dtb.walker.port = dwc.cpu_side
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self._cached_ports += ["itb_walker_cache.mem_side", \
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"dtb_walker_cache.mem_side"]
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else:
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self._cached_ports += ["itb.walker.port", "dtb.walker.port"]
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# Checker doesn't need its own tlb caches because it does
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# functional accesses only
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if self.checker != NULL:
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self._cached_ports += ["checker.itb.walker.port", \
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"checker.dtb.walker.port"]
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def addTwoLevelCacheHierarchy(self, ic, dc, l2c, iwc = None, dwc = None):
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self.addPrivateSplitL1Caches(ic, dc, iwc, dwc)
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# Override the default bus clock of 1 GHz and uses the CPU
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# clock for the L1-to-L2 bus, and also set a width of 32 bytes
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# (256-bits), which is four times that of the default bus.
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self.toL2Bus = CoherentBus(clock = Parent.clock, width = 32)
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self.connectCachedPorts(self.toL2Bus)
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self.l2cache = l2c
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self.toL2Bus.master = self.l2cache.cpu_side
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self._cached_ports = ['l2cache.mem_side']
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def createThreads(self):
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self.isa = [ isa_class() for i in xrange(self.numThreads) ]
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if self.checker != NULL:
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self.checker.createThreads()
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def addCheckerCpu(self):
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pass
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