configs/common/CacheConfig.py - public/gem5 - Git at Google

 # Copyright (c) 2012-2013, 2015-2016 ARM Limited
 # Copyright (c) 2020 Barkhausen Institut
 # 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) 2010 Advanced Micro Devices, Inc.
 # 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.

 # Configure the M5 cache hierarchy config in one place
 #

 import m5
 from m5.objects import *
 from gem5.isas import ISA
 from gem5.runtime import get_runtime_isa

 from common.Caches import *
 from common import ObjectList


 def _get_hwp(hwp_option):
     if hwp_option == None:
         return NULL

     hwpClass = ObjectList.hwp_list.get(hwp_option)
     return hwpClass()


 def _get_cache_opts(level, options):
     opts = {}

     size_attr = "{}_size".format(level)
     if hasattr(options, size_attr):
         opts["size"] = getattr(options, size_attr)

     assoc_attr = "{}_assoc".format(level)
     if hasattr(options, assoc_attr):
         opts["assoc"] = getattr(options, assoc_attr)

     prefetcher_attr = "{}_hwp_type".format(level)
     if hasattr(options, prefetcher_attr):
         opts["prefetcher"] = _get_hwp(getattr(options, prefetcher_attr))

     return opts


 def config_cache(options, system):
     if options.external_memory_system and (options.caches or options.l2cache):
         print("External caches and internal caches are exclusive options.\n")
         sys.exit(1)

     if options.external_memory_system:
         ExternalCache = ExternalCacheFactory(options.external_memory_system)

     if options.cpu_type == "O3_ARM_v7a_3":
         try:
             import cores.arm.O3_ARM_v7a as core
         except:
             print("O3_ARM_v7a_3 is unavailable. Did you compile the O3 model?")
             sys.exit(1)

         dcache_class, icache_class, l2_cache_class, walk_cache_class = (
             core.O3_ARM_v7a_DCache,
             core.O3_ARM_v7a_ICache,
             core.O3_ARM_v7aL2,
             None,
         )
     elif options.cpu_type == "HPI":
         try:
             import cores.arm.HPI as core
         except:
             print("HPI is unavailable.")
             sys.exit(1)

         dcache_class, icache_class, l2_cache_class, walk_cache_class = (
             core.HPI_DCache,
             core.HPI_ICache,
             core.HPI_L2,
             None,
         )
     else:
         dcache_class, icache_class, l2_cache_class, walk_cache_class = (
             L1_DCache,
             L1_ICache,
             L2Cache,
             None,
         )

         if get_runtime_isa() in [ISA.X86, ISA.RISCV]:
             walk_cache_class = PageTableWalkerCache

     # Set the cache line size of the system
     system.cache_line_size = options.cacheline_size

     # If elastic trace generation is enabled, make sure the memory system is
     # minimal so that compute delays do not include memory access latencies.
     # Configure the compulsory L1 caches for the O3CPU, do not configure
     # any more caches.
     if options.l2cache and options.elastic_trace_en:
         fatal("When elastic trace is enabled, do not configure L2 caches.")

     if options.l2cache:
         # Provide a clock for the L2 and the L1-to-L2 bus here as they
         # are not connected using addTwoLevelCacheHierarchy. Use the
         # same clock as the CPUs.
         system.l2 = l2_cache_class(
             clk_domain=system.cpu_clk_domain, **_get_cache_opts("l2", options)
         )

         system.tol2bus = L2XBar(clk_domain=system.cpu_clk_domain)
         system.l2.cpu_side = system.tol2bus.mem_side_ports
         system.l2.mem_side = system.membus.cpu_side_ports

     if options.memchecker:
         system.memchecker = MemChecker()

     for i in range(options.num_cpus):
         if options.caches:
             icache = icache_class(**_get_cache_opts("l1i", options))
             dcache = dcache_class(**_get_cache_opts("l1d", options))

             # If we have a walker cache specified, instantiate two
             # instances here
             if walk_cache_class:
                 iwalkcache = walk_cache_class()
                 dwalkcache = walk_cache_class()
             else:
                 iwalkcache = None
                 dwalkcache = None

             if options.memchecker:
                 dcache_mon = MemCheckerMonitor(warn_only=True)
                 dcache_real = dcache

                 # Do not pass the memchecker into the constructor of
                 # MemCheckerMonitor, as it would create a copy; we require
                 # exactly one MemChecker instance.
                 dcache_mon.memchecker = system.memchecker

                 # Connect monitor
                 dcache_mon.mem_side = dcache.cpu_side

                 # Let CPU connect to monitors
                 dcache = dcache_mon

             # When connecting the caches, the clock is also inherited
             # from the CPU in question
             system.cpu[i].addPrivateSplitL1Caches(
                 icache, dcache, iwalkcache, dwalkcache
             )

             if options.memchecker:
                 # The mem_side ports of the caches haven't been connected yet.
                 # Make sure connectAllPorts connects the right objects.
                 system.cpu[i].dcache = dcache_real
                 system.cpu[i].dcache_mon = dcache_mon

         elif options.external_memory_system:
             # These port names are presented to whatever 'external' system
             # gem5 is connecting to.  Its configuration will likely depend
             # on these names.  For simplicity, we would advise configuring
             # it to use this naming scheme; if this isn't possible, change
             # the names below.
             if get_runtime_isa() in [ISA.X86, ISA.ARM, ISA.RISCV]:
                 system.cpu[i].addPrivateSplitL1Caches(
                     ExternalCache("cpu%d.icache" % i),
                     ExternalCache("cpu%d.dcache" % i),
                     ExternalCache("cpu%d.itb_walker_cache" % i),
                     ExternalCache("cpu%d.dtb_walker_cache" % i),
                 )
             else:
                 system.cpu[i].addPrivateSplitL1Caches(
                     ExternalCache("cpu%d.icache" % i),
                     ExternalCache("cpu%d.dcache" % i),
                 )

         system.cpu[i].createInterruptController()
         if options.l2cache:
             system.cpu[i].connectAllPorts(
                 system.tol2bus.cpu_side_ports,
                 system.membus.cpu_side_ports,
                 system.membus.mem_side_ports,
             )
         elif options.external_memory_system:
             system.cpu[i].connectUncachedPorts(
                 system.membus.cpu_side_ports, system.membus.mem_side_ports
             )
         else:
             system.cpu[i].connectBus(system.membus)

     return system


 # ExternalSlave provides a "port", but when that port connects to a cache,
 # the connecting CPU SimObject wants to refer to its "cpu_side".
 # The 'ExternalCache' class provides this adaptation by rewriting the name,
 # eliminating distracting changes elsewhere in the config code.
 class ExternalCache(ExternalSlave):
     def __getattr__(cls, attr):
         if attr == "cpu_side":
             attr = "port"
         return super(ExternalSlave, cls).__getattr__(attr)

     def __setattr__(cls, attr, value):
         if attr == "cpu_side":
             attr = "port"
         return super(ExternalSlave, cls).__setattr__(attr, value)


 def ExternalCacheFactory(port_type):
     def make(name):
         return ExternalCache(
             port_data=name, port_type=port_type, addr_ranges=[AllMemory]
         )

     return make
	# Copyright (c) 2012-2013, 2015-2016 ARM Limited
	# Copyright (c) 2020 Barkhausen Institut
	# 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) 2010 Advanced Micro Devices, Inc.
	# 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.

	# Configure the M5 cache hierarchy config in one place
	#

	import m5
	from m5.objects import *
	from gem5.isas import ISA
	from gem5.runtime import get_runtime_isa

	from common.Caches import *
	from common import ObjectList


	def _get_hwp(hwp_option):
	if hwp_option == None:
	return NULL

	hwpClass = ObjectList.hwp_list.get(hwp_option)
	return hwpClass()


	def _get_cache_opts(level, options):
	opts = {}

	size_attr = "{}_size".format(level)
	if hasattr(options, size_attr):
	opts["size"] = getattr(options, size_attr)

	assoc_attr = "{}_assoc".format(level)
	if hasattr(options, assoc_attr):
	opts["assoc"] = getattr(options, assoc_attr)

	prefetcher_attr = "{}_hwp_type".format(level)
	if hasattr(options, prefetcher_attr):
	opts["prefetcher"] = _get_hwp(getattr(options, prefetcher_attr))

	return opts


	def config_cache(options, system):
	if options.external_memory_system and (options.caches or options.l2cache):
	print("External caches and internal caches are exclusive options.\n")
	sys.exit(1)

	if options.external_memory_system:
	ExternalCache = ExternalCacheFactory(options.external_memory_system)

	if options.cpu_type == "O3_ARM_v7a_3":
	try:
	import cores.arm.O3_ARM_v7a as core
	except:
	print("O3_ARM_v7a_3 is unavailable. Did you compile the O3 model?")
	sys.exit(1)

	dcache_class, icache_class, l2_cache_class, walk_cache_class = (
	core.O3_ARM_v7a_DCache,
	core.O3_ARM_v7a_ICache,
	core.O3_ARM_v7aL2,
	None,
	)
	elif options.cpu_type == "HPI":
	try:
	import cores.arm.HPI as core
	except:
	print("HPI is unavailable.")
	sys.exit(1)

	dcache_class, icache_class, l2_cache_class, walk_cache_class = (
	core.HPI_DCache,
	core.HPI_ICache,
	core.HPI_L2,
	None,
	)
	else:
	dcache_class, icache_class, l2_cache_class, walk_cache_class = (
	L1_DCache,
	L1_ICache,
	L2Cache,
	None,
	)

	if get_runtime_isa() in [ISA.X86, ISA.RISCV]:
	walk_cache_class = PageTableWalkerCache

	# Set the cache line size of the system
	system.cache_line_size = options.cacheline_size

	# If elastic trace generation is enabled, make sure the memory system is
	# minimal so that compute delays do not include memory access latencies.
	# Configure the compulsory L1 caches for the O3CPU, do not configure
	# any more caches.
	if options.l2cache and options.elastic_trace_en:
	fatal("When elastic trace is enabled, do not configure L2 caches.")

	if options.l2cache:
	# Provide a clock for the L2 and the L1-to-L2 bus here as they
	# are not connected using addTwoLevelCacheHierarchy. Use the
	# same clock as the CPUs.
	system.l2 = l2_cache_class(
	clk_domain=system.cpu_clk_domain, **_get_cache_opts("l2", options)
	)

	system.tol2bus = L2XBar(clk_domain=system.cpu_clk_domain)
	system.l2.cpu_side = system.tol2bus.mem_side_ports
	system.l2.mem_side = system.membus.cpu_side_ports

	if options.memchecker:
	system.memchecker = MemChecker()

	for i in range(options.num_cpus):
	if options.caches:
	icache = icache_class(**_get_cache_opts("l1i", options))
	dcache = dcache_class(**_get_cache_opts("l1d", options))

	# If we have a walker cache specified, instantiate two
	# instances here
	if walk_cache_class:
	iwalkcache = walk_cache_class()
	dwalkcache = walk_cache_class()
	else:
	iwalkcache = None
	dwalkcache = None

	if options.memchecker:
	dcache_mon = MemCheckerMonitor(warn_only=True)
	dcache_real = dcache

	# Do not pass the memchecker into the constructor of
	# MemCheckerMonitor, as it would create a copy; we require
	# exactly one MemChecker instance.
	dcache_mon.memchecker = system.memchecker

	# Connect monitor
	dcache_mon.mem_side = dcache.cpu_side

	# Let CPU connect to monitors
	dcache = dcache_mon

	# When connecting the caches, the clock is also inherited
	# from the CPU in question
	system.cpu[i].addPrivateSplitL1Caches(
	icache, dcache, iwalkcache, dwalkcache
	)

	if options.memchecker:
	# The mem_side ports of the caches haven't been connected yet.
	# Make sure connectAllPorts connects the right objects.
	system.cpu[i].dcache = dcache_real
	system.cpu[i].dcache_mon = dcache_mon

	elif options.external_memory_system:
	# These port names are presented to whatever 'external' system
	# gem5 is connecting to. Its configuration will likely depend
	# on these names. For simplicity, we would advise configuring
	# it to use this naming scheme; if this isn't possible, change
	# the names below.
	if get_runtime_isa() in [ISA.X86, ISA.ARM, ISA.RISCV]:
	system.cpu[i].addPrivateSplitL1Caches(
	ExternalCache("cpu%d.icache" % i),
	ExternalCache("cpu%d.dcache" % i),
	ExternalCache("cpu%d.itb_walker_cache" % i),
	ExternalCache("cpu%d.dtb_walker_cache" % i),
	)
	else:
	system.cpu[i].addPrivateSplitL1Caches(
	ExternalCache("cpu%d.icache" % i),
	ExternalCache("cpu%d.dcache" % i),
	)

	system.cpu[i].createInterruptController()
	if options.l2cache:
	system.cpu[i].connectAllPorts(
	system.tol2bus.cpu_side_ports,
	system.membus.cpu_side_ports,
	system.membus.mem_side_ports,
	)
	elif options.external_memory_system:
	system.cpu[i].connectUncachedPorts(
	system.membus.cpu_side_ports, system.membus.mem_side_ports
	)
	else:
	system.cpu[i].connectBus(system.membus)

	return system


	# ExternalSlave provides a "port", but when that port connects to a cache,
	# the connecting CPU SimObject wants to refer to its "cpu_side".
	# The 'ExternalCache' class provides this adaptation by rewriting the name,
	# eliminating distracting changes elsewhere in the config code.
	class ExternalCache(ExternalSlave):
	def __getattr__(cls, attr):
	if attr == "cpu_side":
	attr = "port"
	return super(ExternalSlave, cls).__getattr__(attr)

	def __setattr__(cls, attr, value):
	if attr == "cpu_side":
	attr = "port"
	return super(ExternalSlave, cls).__setattr__(attr, value)


	def ExternalCacheFactory(port_type):
	def make(name):
	return ExternalCache(
	port_data=name, port_type=port_type, addr_ranges=[AllMemory]
	)

	return make