config: Command line support for multi-channel memory

This patch adds support for specifying multi-channel memory
configurations on the command line, e.g. 'se/fs.py
--mem-type=ddr3_1600_x64 --mem-channels=4'. To enable this, it
enhances the functionality of MemConfig and moves the existing
makeMultiChannel class method from SimpleDRAM to the support scripts.

The se/fs.py example scripts are updated to make use of the new
feature.

2 files changed, 7 insertions, 9 deletions

diff --git a/configs/example/fs.py b/configs/example/fs.py
index bcd58ca5e..4d6d87eb8 100644
--- a/configs/example/fs.py
+++ b/configs/example/fs.py
@@ -53,6 +53,7 @@ from SysPaths import *
 from Benchmarks import *
 import Simulation
 import CacheConfig
+import MemConfig
 from Caches import *
 import Options
 
@@ -171,12 +172,7 @@ for i in xrange(np):
     test_sys.cpu[i].createThreads()
 
 CacheConfig.config_cache(options, test_sys)
-
-# Create the appropriate memory controllers and connect them to the
-# memory bus
-test_sys.mem_ctrls = [TestMemClass(range = r) for r in test_sys.mem_ranges]
-for i in xrange(len(test_sys.mem_ctrls)):
-    test_sys.mem_ctrls[i].port = test_sys.membus.master
+MemConfig.config_mem(options, test_sys)
 
 if len(bm) == 2:
     if buildEnv['TARGET_ISA'] == 'alpha':
diff --git a/configs/example/se.py b/configs/example/se.py
index 39572cd86..02a0d3b96 100644
--- a/configs/example/se.py
+++ b/configs/example/se.py
@@ -58,6 +58,7 @@ import Options
 import Ruby
 import Simulation
 import CacheConfig
+import MemConfig
 from Caches import *
 from cpu2000 import *
 
@@ -157,8 +158,8 @@ if options.smt and options.num_cpus > 1:
 
 np = options.num_cpus
 system = System(cpu = [CPUClass(cpu_id=i) for i in xrange(np)],
-                physmem = MemClass(range=AddrRange(options.mem_size)),
                 mem_mode = test_mem_mode,
+                mem_ranges = [AddrRange(options.mem_size)],
                 cache_line_size = options.cacheline_size)
 
 # Create a top-level voltage domain
@@ -221,7 +222,8 @@ if options.ruby:
         sys.exit(1)
 
     # Set the option for physmem so that it is not allocated any space
-    system.physmem.null = True
+    system.physmem = MemClass(range=AddrRange(options.mem_size),
+                              null = True)
 
     options.use_map = True
     Ruby.create_system(options, system)
@@ -247,8 +249,8 @@ if options.ruby:
 else:
     system.membus = CoherentBus()
     system.system_port = system.membus.slave
-    system.physmem.port = system.membus.master
     CacheConfig.config_cache(options, system)
+    MemConfig.config_mem(options, system)
 
 root = Root(full_system = False, system = system)
 Simulation.run(options, root, system, FutureClass)