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configs: use SimpleMemory when using ruby in se mode

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A recent changeset altered the default memory class to DRAMCtrl.  In se mode,
ruby uses the physical memory to check if a given address is within the bounds
of the physical memory.  SimpleMemory is enough for this.  Moreover,
SimpleMemory does not check whether it is connected or not, something which
DRAMCtrl does.
This commit is contained in:
Nilay Vaish 2014-04-01 11:17:46 -05:00
parent b884fcf412
commit d6542d7758
1 changed files with 5 additions and 4 deletions
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9
configs/example/se.py
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@ -157,8 +157,6 @@ else:
(CPUClass, test_mem_mode, FutureClass) = Simulation.setCPUClass(options)
CPUClass.numThreads = numThreads
MemClass = Simulation.setMemClass(options)
# Check -- do not allow SMT with multiple CPUs
if options.smt and options.num_cpus > 1:
fatal("You cannot use SMT with multiple CPUs!")
@ -228,8 +226,10 @@ if options.ruby:
print >> sys.stderr, "Ruby requires TimingSimpleCPU or O3CPU!!"
sys.exit(1)
# Set the option for physmem so that it is not allocated any space
system.physmem = MemClass(range=AddrRange(options.mem_size),
# Use SimpleMemory with the null option since this memory is only used
# for determining which addresses are within the range of the memory.
# No space allocation is required.
system.physmem = SimpleMemory(range=AddrRange(options.mem_size),
null = True)
options.use_map = True
Ruby.create_system(options, system)
@ -253,6 +253,7 @@ if options.ruby:
system.cpu[i].itb.walker.port = ruby_port.slave
system.cpu[i].dtb.walker.port = ruby_port.slave
else:
MemClass = Simulation.setMemClass(options)
system.membus = CoherentBus()
system.system_port = system.membus.slave
CacheConfig.config_cache(options, system)