More progress toward actually running a program.

See configs/test.py for test config (using simple
binary in my home directory on zizzer).

base/chunk_generator.hh:
    Fix assertion for chunkSize == 0 (not a power of 2)
base/intmath.hh:
    Fix roundDown to take integer alignments.
cpu/base.cc:
    Register exec contexts regardless of state (not sure why
    this check was in here in the first place).
mem/physical.cc:
    Add breaks to switch.
python/m5/objects/BaseCPU.py:
    Default mem to Parent.any (e.g. get from System).
python/m5/objects/Ethernet.py:
python/m5/objects/Root.py:
    HierParams is gone.
python/m5/objects/PhysicalMemory.py:
    mmu param is full-system only.
sim/process.cc:
    Stack mapping request must be page-aligned and page-sized.
    Don't delete objFile object in create since we are counting
    on it being around for startup().

--HG--
extra : convert_revision : 90c43ee927e7d82a045d6e10302d965797d006f7

python/m5/objects/Root.py

@@ -1,5 +1,4 @@
 from m5 import *
-from HierParams import HierParams
 from Serialize import Serialize
 from Statistics import Statistics
 from Trace import Trace
@@ -13,12 +12,9 @@ class Root(SimObject):
         "print a progress message every n ticks (0 = never)")
     output_file = Param.String('cout', "file to dump simulator output to")
     checkpoint = Param.String('', "checkpoint file to load")
-#    hier = Param.HierParams(HierParams(do_data = False, do_events = True),
-#                            "shared memory hierarchy parameters")
 #    stats = Param.Statistics(Statistics(), "statistics object")
 #    trace = Param.Trace(Trace(), "trace object")
 #    serialize = Param.Serialize(Serialize(), "checkpoint generation options")
-    hier = HierParams(do_data = False, do_events = True)
     stats = Statistics()
     trace = Trace()
     exetrace = ExecutionTrace()