| # Copyright (c) 2012-2013, 2015-2016 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) 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. |
| # |
| # Authors: Lisa Hsu |
| |
| # Configure the M5 cache hierarchy config in one place |
| # |
| |
| from __future__ import print_function |
| |
| import m5 |
| from m5.objects import * |
| from Caches import * |
| |
| 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: |
| from cores.arm.O3_ARM_v7a import * |
| 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 = \ |
| O3_ARM_v7a_DCache, O3_ARM_v7a_ICache, O3_ARM_v7aL2, \ |
| O3_ARM_v7aWalkCache |
| else: |
| dcache_class, icache_class, l2_cache_class, walk_cache_class = \ |
| L1_DCache, L1_ICache, L2Cache, None |
| |
| if buildEnv['TARGET_ISA'] == 'x86': |
| 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, |
| size=options.l2_size, |
| assoc=options.l2_assoc) |
| |
| system.tol2bus = L2XBar(clk_domain = system.cpu_clk_domain) |
| system.l2.cpu_side = system.tol2bus.master |
| system.l2.mem_side = system.membus.slave |
| |
| if options.memchecker: |
| system.memchecker = MemChecker() |
| |
| for i in range(options.num_cpus): |
| if options.caches: |
| icache = icache_class(size=options.l1i_size, |
| assoc=options.l1i_assoc) |
| dcache = dcache_class(size=options.l1d_size, |
| assoc=options.l1d_assoc) |
| |
| # 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 buildEnv['TARGET_ISA'] in ['x86', 'arm']: |
| 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, system.membus) |
| elif options.external_memory_system: |
| system.cpu[i].connectUncachedPorts(system.membus) |
| else: |
| system.cpu[i].connectAllPorts(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 |
