ruby: Add support for address ranges in the directory

Previously the directory covered a flat address range that always
started from address 0. This change adds a vector of address ranges
with interleaving and hashing that each directory keeps track of and
the necessary flexibility to support systems with non continuous
memory ranges.

Change-Id: I6ea1c629bdf4c5137b7d9c89dbaf6c826adfd977
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/2903
Reviewed-by: Bradford Beckmann <brad.beckmann@amd.com>
Reviewed-by: Jason Lowe-Power <jason@lowepower.com>
Maintainer: Jason Lowe-Power <jason@lowepower.com>

configs/ruby/MI_example.py

@@ -31,7 +31,7 @@ import math
 import m5
 from m5.objects import *
 from m5.defines import buildEnv
-from Ruby import create_topology
+from Ruby import create_topology, create_directories
 from Ruby import send_evicts
 
 #
@@ -55,7 +55,6 @@ def create_system(options, full_system, system, dma_ports, ruby_system):
     # listed before the directory nodes and directory nodes before dma nodes, etc.
     #
     l1_cntrl_nodes = []
-    dir_cntrl_nodes = []
     dma_cntrl_nodes = []
 
     #
@@ -126,18 +125,9 @@ def create_system(options, full_system, system, dma_ports, ruby_system):
                                           clk_domain=ruby_system.clk_domain,
                                           clk_divider=3)
 
-    for i in xrange(options.num_dirs):
-        dir_size = MemorySize('0B')
-        dir_size.value = mem_module_size
-        dir_cntrl = Directory_Controller(version = i,
-                                         directory = RubyDirectoryMemory(
-                                             version = i, size = dir_size),
-                                         transitions_per_cycle = options.ports,
-                                         ruby_system = ruby_system)
-
-        exec("ruby_system.dir_cntrl%d = dir_cntrl" % i)
-        dir_cntrl_nodes.append(dir_cntrl)
-
+    dir_cntrl_nodes = create_directories(options, system.mem_ranges,
+                                         ruby_system)
+    for dir_cntrl in dir_cntrl_nodes:
         # Connect the directory controllers and the network
         dir_cntrl.requestToDir = MessageBuffer(ordered = True)
         dir_cntrl.requestToDir.slave = ruby_system.network.master