gem5/tests/configs/pc-simple-atomic.py
Andreas Hansson 2208ea049f MEM: Make the bus bridge unidirectional and fixed address range
This patch makes the bus bridge uni-directional and specialises the
bus ports to be a master port and a slave port. This greatly
simplifies the assumptions on both sides as either port only has to
deal with requests or responses. The following patches introduce the
notion of master and slave ports, and would not be possible without
this split of responsibilities.

In making the bridge unidirectional, the address range mechanism of
the bridge is also changed. For the cases where communication is
taking place both ways, an additional bridge is needed. This causes
issues with the existing mechanism, as the busses cannot determine
when to stop iterating the address updates from the two bridges. To
avoid this issue, and also greatly simplify the specification, the
bridge now has a fixed set of address ranges, specified at creation
time.
2012-01-17 12:55:09 -06:00

115 lines
3.5 KiB
Python

# Copyright (c) 2006-2007 The Regents of The University of Michigan
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# neither the name of the copyright holders nor the names of its
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# this software without specific prior written permission.
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# Authors: Steve Reinhardt
import m5
from m5.objects import *
m5.util.addToPath('../configs/common')
from Benchmarks import SysConfig
import FSConfig
mem_size = '128MB'
# --------------------
# Base L1 Cache
# ====================
class L1(BaseCache):
latency = '1ns'
block_size = 64
mshrs = 4
tgts_per_mshr = 8
is_top_level = True
# ----------------------
# Base L2 Cache
# ----------------------
class L2(BaseCache):
block_size = 64
latency = '10ns'
mshrs = 92
tgts_per_mshr = 16
write_buffers = 8
# ---------------------
# Page table walker cache
# ---------------------
class PageTableWalkerCache(BaseCache):
assoc = 2
block_size = 64
latency = '1ns'
mshrs = 10
size = '1kB'
tgts_per_mshr = 12
is_top_level = True
# ---------------------
# I/O Cache
# ---------------------
class IOCache(BaseCache):
assoc = 8
block_size = 64
latency = '50ns'
mshrs = 20
size = '1kB'
tgts_per_mshr = 12
addr_range = AddrRange(0, size=mem_size)
forward_snoops = False
is_top_level = True
#cpu
cpu = AtomicSimpleCPU(cpu_id=0)
#the system
mdesc = SysConfig(disk = 'linux-x86.img')
system = FSConfig.makeLinuxX86System('atomic', mdesc=mdesc)
system.kernel = FSConfig.binary('x86_64-vmlinux-2.6.22.9')
system.iocache = IOCache(addr_range=mem_size)
system.iocache.cpu_side = system.iobus.port
system.iocache.mem_side = system.membus.port
system.cpu = cpu
#create the l1/l2 bus
system.toL2Bus = Bus()
#connect up the l2 cache
system.l2c = L2(size='4MB', assoc=8)
system.l2c.cpu_side = system.toL2Bus.port
system.l2c.mem_side = system.membus.port
#connect up the cpu and l1s
cpu.addPrivateSplitL1Caches(L1(size = '32kB', assoc = 1),
L1(size = '32kB', assoc = 4),
PageTableWalkerCache(),
PageTableWalkerCache())
# connect cpu level-1 caches to shared level-2 cache
cpu.connectAllPorts(system.toL2Bus, system.membus)
cpu.clock = '2GHz'
root = Root(system=system)
m5.ticks.setGlobalFrequency('1THz')