src/sim/System.py - public/gem5 - Git at Google

 # Copyright (c) 2017, 2019 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) 2005-2007 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.

 from m5.SimObject import *
 from m5.defines import buildEnv
 from m5.params import *
 from m5.proxy import *

 from m5.objects.DVFSHandler import *
 from m5.objects.SimpleMemory import *

 class MemoryMode(Enum): vals = ['invalid', 'atomic', 'timing',
                                 'atomic_noncaching']

 if buildEnv['TARGET_ISA'] in ('sparc', 'power'):
     default_byte_order = 'big'
 else:
     default_byte_order = 'little'

 class System(SimObject):
     type = 'System'
     cxx_header = "sim/system.hh"
     system_port = RequestPort("System port")

     cxx_exports = [
         PyBindMethod("getMemoryMode"),
         PyBindMethod("setMemoryMode"),
     ]

     memories = VectorParam.AbstractMemory(Self.all,
                                           "All memories in the system")
     mem_mode = Param.MemoryMode('atomic', "The mode the memory system is in")

     thermal_model = Param.ThermalModel(NULL, "Thermal model")
     thermal_components = VectorParam.SimObject([],
             "A collection of all thermal components in the system.")

     # When reserving memory on the host, we have the option of
     # reserving swap space or not (by passing MAP_NORESERVE to
     # mmap). By enabling this flag, we accommodate cases where a large
     # (but sparse) memory is simulated.
     mmap_using_noreserve = Param.Bool(False, "mmap the backing store " \
                                           "without reserving swap")

     # The memory ranges are to be populated when creating the system
     # such that these can be passed from the I/O subsystem through an
     # I/O bridge or cache
     mem_ranges = VectorParam.AddrRange([], "Ranges that constitute main memory")

     shared_backstore = Param.String("", "backstore's shmem segment filename, "
         "use to directly address the backstore from another host-OS process. "
         "Leave this empty to unset the MAP_SHARED flag.")

     cache_line_size = Param.Unsigned(64, "Cache line size in bytes")

     byte_order = Param.ByteOrder(default_byte_order,
                                  "Default byte order of system components")

     redirect_paths = VectorParam.RedirectPath([], "Path redirections")

     exit_on_work_items = Param.Bool(False, "Exit from the simulation loop when "
                                     "encountering work item annotations.")
     work_item_id = Param.Int(-1, "specific work item id")
     num_work_ids = Param.Int(16, "Number of distinct work item types")
     work_begin_cpu_id_exit = Param.Int(-1,
         "work started on specific id, now exit simulation")
     work_begin_ckpt_count = Param.Counter(0,
         "create checkpoint when work items begin count value is reached")
     work_begin_exit_count = Param.Counter(0,
         "exit simulation when work items begin count value is reached")
     work_end_ckpt_count = Param.Counter(0,
         "create checkpoint when work items end count value is reached")
     work_end_exit_count = Param.Counter(0,
         "exit simulation when work items end count value is reached")
     work_cpus_ckpt_count = Param.Counter(0,
         "create checkpoint when active cpu count value is reached")

     workload = Param.Workload(NULL, "Operating system kernel")
     init_param = Param.UInt64(0, "numerical value to pass into simulator")
     readfile = Param.String("", "file to read startup script from")
     symbolfile = Param.String("", "file to get the symbols from")

     multi_thread = Param.Bool(False,
             "Supports multi-threaded CPUs? Impacts Thread/Context IDs")

     # Dynamic voltage and frequency handler for the system, disabled by default
     # Provide list of domains that need to be controlled by the handler
     dvfs_handler = DVFSHandler()

     # SE mode doesn't use the ISA System subclasses, and so we need to set an
     # ISA specific value in this class directly.
     m5ops_base = Param.Addr(
         0xffff0000 if buildEnv['TARGET_ISA'] == 'x86' else 0,
         "Base of the 64KiB PA range used for memory-mapped m5ops. Set to 0 "
         "to disable.")

     if buildEnv['USE_KVM']:
         kvm_vm = Param.KvmVM(NULL, 'KVM VM (i.e., shared memory domain)')
	# Copyright (c) 2017, 2019 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) 2005-2007 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.

	from m5.SimObject import *
	from m5.defines import buildEnv
	from m5.params import *
	from m5.proxy import *

	from m5.objects.DVFSHandler import *
	from m5.objects.SimpleMemory import *

	class MemoryMode(Enum): vals = ['invalid', 'atomic', 'timing',
	'atomic_noncaching']

	if buildEnv['TARGET_ISA'] in ('sparc', 'power'):
	default_byte_order = 'big'
	else:
	default_byte_order = 'little'

	class System(SimObject):
	type = 'System'
	cxx_header = "sim/system.hh"
	system_port = RequestPort("System port")

	cxx_exports = [
	PyBindMethod("getMemoryMode"),
	PyBindMethod("setMemoryMode"),
	]

	memories = VectorParam.AbstractMemory(Self.all,
	"All memories in the system")
	mem_mode = Param.MemoryMode('atomic', "The mode the memory system is in")

	thermal_model = Param.ThermalModel(NULL, "Thermal model")
	thermal_components = VectorParam.SimObject([],
	"A collection of all thermal components in the system.")

	# When reserving memory on the host, we have the option of
	# reserving swap space or not (by passing MAP_NORESERVE to
	# mmap). By enabling this flag, we accommodate cases where a large
	# (but sparse) memory is simulated.
	mmap_using_noreserve = Param.Bool(False, "mmap the backing store " \
	"without reserving swap")

	# The memory ranges are to be populated when creating the system
	# such that these can be passed from the I/O subsystem through an
	# I/O bridge or cache
	mem_ranges = VectorParam.AddrRange([], "Ranges that constitute main memory")

	shared_backstore = Param.String("", "backstore's shmem segment filename, "
	"use to directly address the backstore from another host-OS process. "
	"Leave this empty to unset the MAP_SHARED flag.")

	cache_line_size = Param.Unsigned(64, "Cache line size in bytes")

	byte_order = Param.ByteOrder(default_byte_order,
	"Default byte order of system components")

	redirect_paths = VectorParam.RedirectPath([], "Path redirections")

	exit_on_work_items = Param.Bool(False, "Exit from the simulation loop when "
	"encountering work item annotations.")
	work_item_id = Param.Int(-1, "specific work item id")
	num_work_ids = Param.Int(16, "Number of distinct work item types")
	work_begin_cpu_id_exit = Param.Int(-1,
	"work started on specific id, now exit simulation")
	work_begin_ckpt_count = Param.Counter(0,
	"create checkpoint when work items begin count value is reached")
	work_begin_exit_count = Param.Counter(0,
	"exit simulation when work items begin count value is reached")
	work_end_ckpt_count = Param.Counter(0,
	"create checkpoint when work items end count value is reached")
	work_end_exit_count = Param.Counter(0,
	"exit simulation when work items end count value is reached")
	work_cpus_ckpt_count = Param.Counter(0,
	"create checkpoint when active cpu count value is reached")

	workload = Param.Workload(NULL, "Operating system kernel")
	init_param = Param.UInt64(0, "numerical value to pass into simulator")
	readfile = Param.String("", "file to read startup script from")
	symbolfile = Param.String("", "file to get the symbols from")

	multi_thread = Param.Bool(False,
	"Supports multi-threaded CPUs? Impacts Thread/Context IDs")

	# Dynamic voltage and frequency handler for the system, disabled by default
	# Provide list of domains that need to be controlled by the handler
	dvfs_handler = DVFSHandler()

	# SE mode doesn't use the ISA System subclasses, and so we need to set an
	# ISA specific value in this class directly.
	m5ops_base = Param.Addr(
	0xffff0000 if buildEnv['TARGET_ISA'] == 'x86' else 0,
	"Base of the 64KiB PA range used for memory-mapped m5ops. Set to 0 "
	"to disable.")

	if buildEnv['USE_KVM']:
	kvm_vm = Param.KvmVM(NULL, 'KVM VM (i.e., shared memory domain)')