diff -r 4a86763c0b30 -r 7b83be200f9e configs/example/arm/fs_bigLITTLE.py
--- a/configs/example/arm/fs_bigLITTLE.py	Sat Oct 15 15:11:07 2016 -0500
+++ b/configs/example/arm/fs_bigLITTLE.py	Tue Oct 18 20:39:12 2016 -0700
@@ -52,7 +52,7 @@
 from common import CpuConfig
 
 import devices
-
+import MemConfig
 
 default_dtb = 'armv8_gem5_v1_big_little_2_2.dtb'
 default_kernel = 'vmlinux4.3.aarch64'
@@ -79,15 +79,14 @@
                                          cpu_voltage, *cpu_config)
 
 
-def createSystem(kernel, bootscript, disks=[]):
+def createSystem(options, kernel, bootscript, disks=[]):
     sys = devices.SimpleSystem(kernel=SysPaths.binary(kernel),
                                readfile=bootscript,
                                machine_type="DTOnly")
 
     mem_region = sys.realview._mem_regions[0]
-    sys.mem_ctrls = SimpleMemory(
-        range=AddrRange(start=mem_region[0], size=default_mem_size))
-    sys.mem_ctrls.port = sys.membus.master
+    sys.mem_ranges = AddrRange(start=mem_region[0], size=default_mem_size)
+    MemConfig.config_mem(options, sys)
 
     sys.connect()
 
@@ -140,6 +139,21 @@
     parser.add_argument("--little-cpu-clock", type=str, default="1GHz",
                         help="Little CPU clock frequency")
 
+    parser.add_argument("--mem-type", type=str, default="DDR3_1600_x64",
+                        help="memory controller type")
+    parser.add_argument("--mem-channels", type=int, default=1,
+                        help = "number of memory channels")
+    parser.add_argument("--mem-ranks", type=int, default=None,
+                        help = "number of memory ranks per channel")
+    parser.add_argument("--mem-size", action="store", type=str,
+                        default="512MB",
+                        help="Specify the physical memory size")
+    parser.add_argument("--tlm-memory", type=str,
+                        help="use external port for SystemC TLM ")
+    parser.add_argument("--external-memory-system", type=str,
+                        help="use external ports of this port_type for caches")
+    parser.add_argument("--elastic-trace-en", action="store_true",
+                        help="Enable capture of elastic trace probe.")
     m5.ticks.fixGlobalFrequency()
 
     options = parser.parse_args()
@@ -160,7 +174,8 @@
     root = Root(full_system=True)
 
     disks = default_disk if len(options.disk) == 0 else options.disk
-    system = createSystem(options.kernel, options.bootscript, disks=disks)
+    system = createSystem(options, options.kernel, options.bootscript,
+                           disks=disks)
 
     root.system = system
     system.boot_osflags = " ".join(kernel_cmd)