45f881a4ce
Still need:
-Handle NACK's on the recieve side
-Distinguish top level caches
-Handle repsonses from caches failing the fast path
-Handle BusError and propogate it
-Fix the invalidate packet associated with snooping in the cache
src/mem/bus.cc:
Make sure to snoop on functional accesses
src/mem/cache/base_cache.cc:
Wait to make a request into a response until it is ready to be issued
src/mem/cache/base_cache.hh:
Support range changes for snoops
Set up snoop responses for cache->cache transfers
src/mem/cache/cache_impl.hh:
Only access the cache if it wasn't satisfied by cache->cache transfer
Handle snoop phases (detect block, then snoop)
Fix functional access to work properly (still need to fix snoop path for functional accesses)
--HG--
extra : convert_revision : 4c25f11d7a996c1f56f4f7b55dde87a344e5fdf8
87 lines
2.8 KiB
Python
87 lines
2.8 KiB
Python
# Copyright (c) 2006 The Regents of The University of Michigan
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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: Ron Dreslinski
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import m5
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from m5.objects import *
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# --------------------
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# Base L1 Cache
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# ====================
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class L1(BaseCache):
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latency = 1
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block_size = 64
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mshrs = 4
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tgts_per_mshr = 8
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protocol = CoherenceProtocol(protocol='moesi')
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# ----------------------
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# Base L2 Cache
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# ----------------------
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class L2(BaseCache):
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block_size = 64
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latency = 100
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mshrs = 92
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tgts_per_mshr = 16
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write_buffers = 8
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nb_cores = 4
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cpus = [ AtomicSimpleCPU() for i in xrange(nb_cores) ]
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# system simulated
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system = System(cpu = cpus, physmem = PhysicalMemory(), membus =
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Bus())
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# l2cache & bus
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system.toL2Bus = Bus()
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system.l2c = L2(size='4MB', assoc=8)
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system.l2c.cpu_side = system.toL2Bus.port
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# connect l2c to membus
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system.l2c.mem_side = system.membus.port
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# add L1 caches
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for cpu in cpus:
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cpu.addPrivateSplitL1Caches(L1(size = '32kB', assoc = 1),
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L1(size = '32kB', assoc = 4))
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cpu.mem = cpu.dcache
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# connect cpu level-1 caches to shared level-2 cache
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cpu.connectMemPorts(system.toL2Bus)
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# connect memory to membus
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system.physmem.port = system.membus.port
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# -----------------------
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# run simulation
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# -----------------------
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root = Root( system = system )
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root.system.mem_mode = 'atomic'
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