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
90 lines
2.9 KiB
Python
90 lines
2.9 KiB
Python
# Copyright (c) 2006 The Regents of The University of Michigan
|
|
# 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: Ron Dreslinski
|
|
|
|
import m5
|
|
from m5.objects import *
|
|
m5.AddToPath('../configs/common')
|
|
from FullO3Config import *
|
|
|
|
# --------------------
|
|
# Base L1 Cache
|
|
# ====================
|
|
|
|
class L1(BaseCache):
|
|
latency = 1
|
|
block_size = 64
|
|
mshrs = 4
|
|
tgts_per_mshr = 8
|
|
protocol = CoherenceProtocol(protocol='moesi')
|
|
|
|
# ----------------------
|
|
# Base L2 Cache
|
|
# ----------------------
|
|
|
|
class L2(BaseCache):
|
|
block_size = 64
|
|
latency = 100
|
|
mshrs = 92
|
|
tgts_per_mshr = 16
|
|
write_buffers = 8
|
|
|
|
nb_cores = 4
|
|
cpus = [ DetailedO3CPU() for i in xrange(nb_cores) ]
|
|
|
|
# system simulated
|
|
system = System(cpu = cpus, physmem = PhysicalMemory(), membus =
|
|
Bus())
|
|
|
|
# l2cache & bus
|
|
system.toL2Bus = Bus()
|
|
system.l2c = L2(size='4MB', assoc=8)
|
|
system.l2c.cpu_side = system.toL2Bus.port
|
|
|
|
# connect l2c to membus
|
|
system.l2c.mem_side = system.membus.port
|
|
|
|
# add L1 caches
|
|
for cpu in cpus:
|
|
cpu.addPrivateSplitL1Caches(L1(size = '32kB', assoc = 1),
|
|
L1(size = '32kB', assoc = 4))
|
|
cpu.mem = cpu.dcache
|
|
# connect cpu level-1 caches to shared level-2 cache
|
|
cpu.connectMemPorts(system.toL2Bus)
|
|
|
|
# connect memory to membus
|
|
system.physmem.port = system.membus.port
|
|
|
|
|
|
# -----------------------
|
|
# run simulation
|
|
# -----------------------
|
|
|
|
root = Root( system = system )
|
|
root.system.mem_mode = 'timing'
|
|
root.trace.flags="Bus Cache"
|
|
#root.trace.flags = "BusAddrRanges"
|