# Copyright (c) 2005 The Regents of The University of Michigan
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met: redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer;
# redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution;
# neither the name of the copyright holders nor the names of its
# contributors may be used to endorse or promote products derived from
# this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
# Authors: Nathan Binkert
#          Steve Reinhardt

import os
import sys

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

import defines
build_env.update(defines.buildEnv)

if internal:
    defines.compileDate = internal.core.compileDate
    for k,v in internal.core.__dict__.iteritems():
        if k.startswith('flag_'):
            setattr(defines, k[5:], v)

    from event import *
    from simulate import *
    from main import options, main
    import stats
    import core

import SimObject
import params
import objects

@@ -4165,16 +4165,25 @@
 = None%0A%0A
+try:%0A    
 import d
@@ -4189,16 +4189,20 @@
 defines%0A
+    
 build_en
@@ -4227,16 +4227,55 @@
 uildEnv)
+%0Aexcept ImportError:%0A    defines = None
 %0A%0Aif int
@@ -4609,16 +4609,26 @@
  params%0A
+%0Atry:%0A    
 import o
@@ -4634,8 +4634,47 @@
 objects%0A
+except ImportError:%0A    objects = None%0A

Make it possible to import the parts of m5 that are pure python