python: Move more code into m5.util allow SCons to use that code.

Get rid of misc.py and just stick misc things in __init__.py
Move utility functions out of SCons files and into m5.util
Move utility type stuff from m5/__init__.py to m5/util/__init__.py
Remove buildEnv from m5 and allow access only from m5.defines
Rename AddToPath to addToPath while we're moving it to m5.util
Rename read_command to readCommand while we're moving it
Rename compare_versions to compareVersions while we're moving it.

--HG--
rename : src/python/m5/convert.py => src/python/m5/util/convert.py
rename : src/python/m5/smartdict.py => src/python/m5/util/smartdict.py

src/python/m5/__init__.py

@@ -25,106 +25,24 @@
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #
 # Authors: Nathan Binkert
-#          Steve Reinhardt
 
-import os
-import sys
+# Import useful subpackages of M5, but *only* when run as an m5
+# script.  This is mostly to keep backward compatibility with existing
+# scripts while allowing new SCons code to operate properly.
 
-import smartdict
-
-# define a MaxTick parameter
-MaxTick = 2**63 - 1
-
-# define this here so we can use it right away if necessary
-
-def errorURL(prefix, s):
-    try:
-        import zlib
-        hashstr = "%x" % zlib.crc32(s)
-    except:
-        hashstr = "UnableToHash"
-    return "For more information see: http://www.m5sim.org/%s/%s" % \
-            (prefix, hashstr)
-
-
-# panic() should be called when something happens that should never
-# ever happen regardless of what the user does (i.e., an acutal m5
-# bug).
-def panic(fmt, *args):
-    print >>sys.stderr, 'panic:', fmt % args
-    print >>sys.stderr, errorURL('panic',fmt)
-    sys.exit(1)
-
-# fatal() should be called when the simulation cannot continue due to
-# some condition that is the user's fault (bad configuration, invalid
-# arguments, etc.) and not a simulator bug.
-def fatal(fmt, *args):
-    print >>sys.stderr, 'fatal:', fmt % args
-    print >>sys.stderr, errorURL('fatal',fmt)
-    sys.exit(1)
-
-# force scalars to one-element lists for uniformity
-def makeList(objOrList):
-    if isinstance(objOrList, list):
-        return objOrList
-    return [objOrList]
-
-# Prepend given directory to system module search path.  We may not
-# need this anymore if we can structure our config library more like a
-# Python package.
-def AddToPath(path):
-    # if it's a relative path and we know what directory the current
-    # python script is in, make the path relative to that directory.
-    if not os.path.isabs(path) and sys.path[0]:
-        path = os.path.join(sys.path[0], path)
-    path = os.path.realpath(path)
-    # sys.path[0] should always refer to the current script's directory,
-    # so place the new dir right after that.
-    sys.path.insert(1, path)
-
-# make a SmartDict out of the build options for our local use
-build_env = smartdict.SmartDict()
-
-# make a SmartDict out of the OS environment too
-env = smartdict.SmartDict()
-env.update(os.environ)
-
-# Since we have so many mutual imports in this package, we should:
-# 1. Put all intra-package imports at the *bottom* of the file, unless
-#    they're absolutely needed before that (for top-level statements
-#    or class attributes).  Imports of "trivial" packages that don't
-#    import other packages (e.g., 'smartdict') can be at the top.
-# 2. Never use 'from foo import *' on an intra-package import since
-#    you can get the wrong result if foo is only partially imported
-#    at the point you do that (i.e., because foo is in the middle of
-#    importing *you*).
 try:
     import internal
 except ImportError:
     internal = None
 
-try:
-    import defines
-    build_env.update(defines.buildEnv)
-except ImportError:
-    defines = None
-
 if internal:
-    defines.compileDate = internal.core.compileDate
-    for k,v in internal.core.__dict__.iteritems():
-        if k.startswith('flag_'):
-            setattr(defines, k[5:], v)
+    import SimObject
+    import core
+    import objects
+    import params
+    import stats
+    import util
 
     from event import *
-    from simulate import *
     from main import options, main
-    import stats
-    import core
-
-import SimObject
-import params
-
-try:
-    import objects
-except ImportError:
-    objects = None
+    from simulate import *