configs,python: Clean some cruft out of m5.objects.

SimObject is already available as m5.SimObject, and it doesn't make a
lot of sense to expose m5.internal.params, part of the internals of
gem5's python interface, as a peer to all the SimObject types.

Change-Id: I3030c1eb261877fd9648c9d3d73b7dbbd4c24345
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/48364
Reviewed-by: Gabe Black <gabe.black@gmail.com>
Maintainer: Gabe Black <gabe.black@gmail.com>
Tested-by: kokoro <noreply+kokoro@google.com>

configs/common/ObjectList.py

@@ -35,6 +35,7 @@
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 import m5.objects
+import m5.internal.params
 import inspect
 import sys
 from textwrap import TextWrapper

src/python/m5/SimObject.py

@@ -1716,6 +1716,9 @@ class SimObject(object, metaclass=MetaSimObject):
         if self._ccParams:
             return self._ccParams
 
+        # Ensure that m5.internal.params is available.
+        import m5.internal.params
+
         cc_params_struct = getattr(m5.internal.params, '%sParams' % self.type)
         cc_params = cc_params_struct()
         cc_params.name = str(self)

src/python/m5/objects/__init__.py

@@ -24,14 +24,6 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-from m5.internal import params
+for module in __spec__.loader_state:
-from m5.SimObject import *
-
-try:
-    modules = __spec__.loader_state
-except NameError:
-    modules = { }
-
-for module in modules:
     if module.startswith('m5.objects.'):
         exec("from %s import *" % module)

src/python/m5/simulate.py

@@ -50,6 +50,7 @@ from . import stats
 from . import SimObject
 from . import ticks
 from . import objects
+from . import params
 from m5.util.dot_writer import do_dot, do_dvfs_dot
 from m5.util.dot_writer_ruby import do_ruby_dot
 
@@ -59,12 +60,6 @@ from .util import attrdict
 # define a MaxTick parameter, unsigned 64 bit
 MaxTick = 2**64 - 1
 
-_memory_modes = {
-    "atomic" : objects.params.atomic,
-    "timing" : objects.params.timing,
-    "atomic_noncaching" : objects.params.atomic_noncaching,
-    }
-
 _drain_manager = _m5.drain.DrainManager.instance()
 
 # The final hook to generate .ini files.  Called from the user script
@@ -292,8 +287,9 @@ def switchCpus(system, cpuList, verbose=True):
             raise RuntimeError(
                 "Old CPU (%s) does not support CPU handover." % (old_cpu,))
 
+    MemoryMode = params.allEnums["MemoryMode"]
     try:
-        memory_mode = _memory_modes[memory_mode_name]
+        memory_mode = MemoryMode(memory_mode_name).getValue()
     except KeyError:
         raise RuntimeError("Invalid memory mode (%s)" % memory_mode_name)
 
@@ -309,7 +305,7 @@ def switchCpus(system, cpuList, verbose=True):
         # Flush the memory system if we are switching to a memory mode
         # that disables caches. This typically happens when switching to a
         # hardware virtualized CPU.
-        if memory_mode == objects.params.atomic_noncaching:
+        if memory_mode == MemoryMode("atomic_noncaching").getValue():
             memWriteback(system)
             memInvalidate(system)