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# Copyright (c) 2005-2007 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: Nathan Binkert
from m5.params import *
from m5.proxy import Self
from MemObject import MemObject
class Prefetch(Enum): vals = ['none', 'tagged', 'stride', 'ghb']
class BaseCache(MemObject):
type = 'BaseCache'
assoc = Param.Int("associativity")
block_size = Param.Int("block size in bytes")
latency = Param.Latency("Latency")
hash_delay = Param.Int(1, "time in cycles of hash access")
max_miss_count = Param.Counter(0,
"number of misses to handle before calling exit")
mshrs = Param.Int("number of MSHRs (max outstanding requests)")
prioritizeRequests = Param.Bool(False,
"always service demand misses first")
repl = Param.Repl(NULL, "replacement policy")
size = Param.MemorySize("capacity in bytes")
forward_snoops = Param.Bool(True,
"forward snoops from mem side to cpu side")
subblock_size = Param.Int(0,
"Size of subblock in IIC used for compression")
tgts_per_mshr = Param.Int("max number of accesses per MSHR")
trace_addr = Param.Addr(0, "address to trace")
two_queue = Param.Bool(False,
"whether the lifo should have two queue replacement")
write_buffers = Param.Int(8, "number of write buffers")
prefetch_on_access = Param.Bool(False,
"notify the hardware prefetcher on every access (not just misses)")
prefetcher_size = Param.Int(100,
"Number of entries in the hardware prefetch queue")
prefetch_past_page = Param.Bool(False,
"Allow prefetches to cross virtual page boundaries")
prefetch_serial_squash = Param.Bool(False,
"Squash prefetches with a later time on a subsequent miss")
prefetch_degree = Param.Int(1,
"Degree of the prefetch depth")
prefetch_latency = Param.Latency(10 * Self.latency,
"Latency of the prefetcher")
prefetch_policy = Param.Prefetch('none',
"Type of prefetcher to use")
prefetch_cache_check_push = Param.Bool(True,
"Check if in cache on push or pop of prefetch queue")
prefetch_use_cpu_id = Param.Bool(True,
"Use the CPU ID to separate calculations of prefetches")
prefetch_data_accesses_only = Param.Bool(False,
"Only prefetch on data not on instruction accesses")
cpu_side = Port("Port on side closer to CPU")
mem_side = Port("Port on side closer to MEM")
addr_range = Param.AddrRange(AllMemory, "The address range for the CPU-side port")
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