def setup_memory_controllers(system, ruby, dir_cntrls, options):
ruby.block_size_bytes = options.cacheline_size
ruby.memory_size_bits = 48
block_size_bits = int(math.log(options.cacheline_size, 2))
if options.numa_high_bit:
numa_bit = options.numa_high_bit
else:
# if the numa_bit is not specified, set the directory bits as the
# lowest bits above the block offset bits, and the numa_bit as the
# highest of those directory bits
dir_bits = int(math.log(options.num_dirs, 2))
numa_bit = block_size_bits + dir_bits - 1
index = 0
mem_ctrls = []
crossbars = []
# Sets bits to be used for interleaving. Creates memory controllers
# attached to a directory controller. A separate controller is created
# for each address range as the abstract memory can handle only one
# contiguous address range as of now.
for dir_cntrl in dir_cntrls:
# Create 1 instance of DRAMCache per directory controller
if options.dramcache:
dramcache_ctrl = MemConfig.create_dramcache_ctrl(
MemConfig.get_cache(options.dramcache_type),
system.mem_ranges[0], index, options.num_dirs,
options.dramcache_size, options.dramcache_assoc,
options.dramcache_block_size, options.num_cpus,
options.dramcache_timing)
mem_ctrls.append(dramcache_ctrl)
dir_cntrl.memory = dramcache_ctrl.port
dir_cntrl.directory.numa_high_bit = numa_bit
crossbar = None
if len(system.mem_ranges) > 1:
# we dont support this
fatal("system mem_ranges greater than 1")
crossbar = IOXBar()
crossbars.append(crossbar)
if options.dramcache:
dramcache_ctrl.dramcache_masterport = crossbar.slave
else:
dir_cntrl.memory = crossbar.slave
for r in system.mem_ranges:
# if dramcache exists interleave at dramcache_block_size
if options.dramcache:
mem_ctrl = MemConfig.create_mem_ctrl(
MemConfig.get(options.mem_type),
r, index, options.num_dirs,
int(math.log(options.num_dirs,
2)), options.dramcache_block_size)
else:
mem_ctrl = MemConfig.create_mem_ctrl(
MemConfig.get(options.mem_type),
r, index, options.num_dirs,
int(math.log(options.num_dirs, 2)), options.cacheline_size)
mem_ctrls.append(mem_ctrl)
if crossbar != None:
mem_ctrl.port = crossbar.master
else:
if options.dramcache:
mem_ctrl.port = dramcache_ctrl.dramcache_masterport
else:
mem_ctrl.port = dir_cntrl.memory
index += 1
system.mem_ctrls = mem_ctrls
if len(crossbars) > 0:
ruby.crossbars = crossbars
