Rework the way SCons recurses into subdirectories, making it

automatic.  The point is that now a subdirectory can be added
to the build process just by creating a SConscript file in it.
The process has two passes.  On the first pass, all subdirs
of the root of the tree are searched for SConsopts files.
These files contain any command line options that ought to be
added for a particular subdirectory.  On the second pass,
all subdirs of the src directory are searched for SConscript
files.  These files describe how to build any given subdirectory.
I have added a Source() function.  Any file (relative to the
directory in which the SConscript resides) passed to that
function is added to the build.  Clean up everything to take
advantage of Source().
function is added to the list of files to be built.

--HG--
extra : convert_revision : 103f6b490d2eb224436688c89cdc015211c4fd30

33 files changed, 1086 insertions, 744 deletions

diff --git a/SConstruct b/SConstruct
index 0a3d6de02..a6659fe9b 100644
--- a/SConstruct
+++ b/SConstruct
@@ -63,10 +63,10 @@
 #
 ###################################################
 
-# Python library imports
 import sys
 import os
 import subprocess
+
 from os.path import join as joinpath
 
 # Check for recent-enough Python and SCons versions.  If your system's
@@ -182,6 +182,7 @@ for t in abs_targets:
 env = Environment(ENV = os.environ,  # inherit user's environment vars
                   ROOT = ROOT,
                   SRCDIR = SRCDIR)
+Export('env')
 
 #Parse CC/CXX early so that we use the correct compiler for 
 # to test for dependencies/versions/libraries/includes
@@ -363,30 +364,42 @@ if have_mysql:
 env = conf.Finish()
 
 # Define the universe of supported ISAs
-env['ALL_ISA_LIST'] = ['alpha', 'sparc', 'mips', 'x86']
+all_isa_list = [ ]
+Export('all_isa_list')
 
 # Define the universe of supported CPU models
-env['ALL_CPU_LIST'] = ['AtomicSimpleCPU', 'TimingSimpleCPU',
-                       'O3CPU', 'OzoneCPU']
-
-if os.path.isdir(joinpath(SRCDIR, 'encumbered/cpu/full')):
-    env['ALL_CPU_LIST'] += ['FullCPU']
+all_cpu_list = [ ]
+default_cpus = [ ]
+Export('all_cpu_list', 'default_cpus')
 
 # Sticky options get saved in the options file so they persist from
 # one invocation to the next (unless overridden, in which case the new
 # value becomes sticky).
 sticky_opts = Options(args=ARGUMENTS)
+Export('sticky_opts')
+
+# Non-sticky options only apply to the current build.
+nonsticky_opts = Options(args=ARGUMENTS)
+Export('nonsticky_opts')
+
+# Walk the tree and execute all SConsopts scripts that wil add to the
+# above options
+for root, dirs, files in os.walk('.'):
+    if 'SConsopts' in files:
+        SConscript(os.path.join(root, 'SConsopts'))
+
+all_isa_list.sort()
+all_cpu_list.sort()
+default_cpus.sort()
+
 sticky_opts.AddOptions(
-    EnumOption('TARGET_ISA', 'Target ISA', 'alpha', env['ALL_ISA_LIST']),
+    EnumOption('TARGET_ISA', 'Target ISA', 'alpha', all_isa_list),
     BoolOption('FULL_SYSTEM', 'Full-system support', False),
     # There's a bug in scons 0.96.1 that causes ListOptions with list
     # values (more than one value) not to be able to be restored from
     # a saved option file.  If this causes trouble then upgrade to
     # scons 0.96.90 or later.
-    ListOption('CPU_MODELS', 'CPU models', 'AtomicSimpleCPU,TimingSimpleCPU,O3CPU',
-               env['ALL_CPU_LIST']),
-    BoolOption('ALPHA_TLASER',
-               'Model Alpha TurboLaser platform (vs. Tsunami)', False),
+    ListOption('CPU_MODELS', 'CPU models', default_cpus, all_cpu_list),
     BoolOption('NO_FAST_ALLOC', 'Disable fast object allocator', False),
     BoolOption('EFENCE', 'Link with Electric Fence malloc debugger',
                False),
@@ -408,8 +421,6 @@ sticky_opts.AddOptions(
      '%s:%s' % (sys.prefix, sys.exec_prefix))
     )
 
-# Non-sticky options only apply to the current build.
-nonsticky_opts = Options(args=ARGUMENTS)
 nonsticky_opts.AddOptions(
     BoolOption('update_ref', 'Update test reference outputs', False)
     )
@@ -514,6 +525,7 @@ env.SConscript('ext/libelf/SConscript',
 #
 ###################################################
 
+env['ALL_ISA_LIST'] = all_isa_list
 def make_switching_dir(dirname, switch_headers, env):
     # Generate the header.  target[0] is the full path of the output
     # header to generate.  'source' is a dummy variable, since we get the
@@ -524,7 +536,7 @@ def make_switching_dir(dirname, switch_headers, env):
 	f = open(fname, 'w')
 	f.write('#include "arch/isa_specific.hh"\n')
 	cond = '#if'
-	for isa in env['ALL_ISA_LIST']:
+	for isa in all_isa_list:
 	    f.write('%s THE_ISA == %s_ISA\n#include "%s/%s/%s"\n'
 		    % (cond, isa.upper(), dirname, isa, basename))
 	    cond = '#elif'
@@ -545,8 +557,7 @@ def make_switching_dir(dirname, switch_headers, env):
     # Instantiate actions for each header
     for hdr in switch_headers:
         env.Command(hdr, [], switch_hdr_action)
-
-env.make_switching_dir = make_switching_dir
+Export('make_switching_dir')
 
 ###################################################
 #
diff --git a/src/SConscript b/src/SConscript
index 74d9bf9a6..5efd2f794 100644
--- a/src/SConscript
+++ b/src/SConscript
@@ -30,195 +30,27 @@
 
 import os
 import sys
-from os.path import isfile, join as joinpath
+
+from os.path import join as joinpath
 
 # This file defines how to build a particular configuration of M5
 # based on variable settings in the 'env' build environment.
 
-# Import build environment variable from SConstruct.
-Import('env')
-
-###################################################
-#
-# Define needed sources.
-#
-###################################################
-
-# Base sources used by all configurations.
-
-base_sources = Split('''
-	base/annotate.cc
-	base/bigint.cc
-	base/circlebuf.cc
-	base/cprintf.cc
-	base/fast_alloc.cc
-	base/fifo_buffer.cc
-	base/hostinfo.cc
-	base/hybrid_pred.cc
-	base/inifile.cc
-	base/intmath.cc
-	base/match.cc
-	base/misc.cc
-	base/output.cc
-	base/pollevent.cc
-	base/range.cc
-	base/random.cc
-	base/remote_gdb.cc
-	base/sat_counter.cc
-	base/socket.cc
-	base/statistics.cc
-	base/str.cc
-	base/time.cc
-	base/trace.cc
-	base/traceflags.cc
-	base/userinfo.cc
-	base/compression/lzss_compression.cc
-	base/loader/aout_object.cc
-	base/loader/ecoff_object.cc
-	base/loader/elf_object.cc
-	base/loader/raw_object.cc
-	base/loader/object_file.cc
-	base/loader/symtab.cc
-	base/stats/events.cc
-        base/stats/output.cc
-	base/stats/statdb.cc
-	base/stats/visit.cc
-	base/stats/text.cc
-
-        cpu/activity.cc
-	cpu/base.cc
-	cpu/cpuevent.cc
-	cpu/exetrace.cc
-        cpu/func_unit.cc
-        cpu/op_class.cc
-	cpu/pc_event.cc
-        cpu/quiesce_event.cc
-	cpu/static_inst.cc
-        cpu/simple_thread.cc
-        cpu/thread_state.cc
-
-        mem/bridge.cc
-        mem/bus.cc
-        mem/dram.cc
-        mem/mem_object.cc
-        mem/packet.cc
-        mem/physical.cc
-        mem/port.cc
-        mem/tport.cc
-
-        mem/cache/base_cache.cc
-        mem/cache/cache.cc
-        mem/cache/coherence/coherence_protocol.cc
-        mem/cache/coherence/uni_coherence.cc
-        mem/cache/miss/blocking_buffer.cc
-        mem/cache/miss/miss_buffer.cc
-        mem/cache/miss/miss_queue.cc
-        mem/cache/miss/mshr.cc
-        mem/cache/miss/mshr_queue.cc
-        mem/cache/prefetch/base_prefetcher.cc
-        mem/cache/prefetch/ghb_prefetcher.cc
-        mem/cache/prefetch/stride_prefetcher.cc
-        mem/cache/prefetch/tagged_prefetcher.cc
-        mem/cache/tags/base_tags.cc
-        mem/cache/tags/fa_lru.cc
-        mem/cache/tags/iic.cc
-        mem/cache/tags/lru.cc
-        mem/cache/tags/repl/gen.cc
-        mem/cache/tags/repl/repl.cc
-        mem/cache/tags/split.cc
-        mem/cache/tags/split_lifo.cc
-        mem/cache/tags/split_lru.cc
-
-        mem/cache/cache_builder.cc
-
-        python/swig/init.cc
-        python/swig/core_wrap.cc
-        python/swig/debug_wrap.cc
-        python/swig/event_wrap.cc
-        python/swig/random_wrap.cc
-        python/swig/sim_object_wrap.cc
-        python/swig/stats_wrap.cc
-        python/swig/trace_wrap.cc
-        python/swig/pyevent.cc
-        python/swig/pyobject.cc
-
-        sim/async.cc
-	sim/builder.cc
-        sim/core.cc
-	sim/debug.cc
-	sim/eventq.cc
-	sim/faults.cc
-	sim/main.cc
-	sim/param.cc
-	sim/root.cc
-	sim/serialize.cc
-	sim/sim_events.cc
-	sim/sim_object.cc
-        sim/simulate.cc
-	sim/startup.cc
-	sim/stat_control.cc
-	sim/system.cc
-        ''')
-
-trace_reader_sources = Split('''
-        cpu/trace/reader/mem_trace_reader.cc
-        cpu/trace/reader/ibm_reader.cc
-        cpu/trace/reader/itx_reader.cc
-        cpu/trace/reader/m5_reader.cc
-        cpu/trace/opt_cpu.cc
-        cpu/trace/trace_cpu.cc
-        ''')
-
-
-
-# MySql sources
-mysql_sources = Split('''
-	base/mysql.cc
-	base/stats/mysql.cc
-        ''')
-
-# Full-system sources
-full_system_sources = Split('''
-	base/crc.cc
-	base/inet.cc
-
-	cpu/intr_control.cc
-        cpu/profile.cc
-
-	dev/uart.cc
-	dev/uart8250.cc
+Import('*')
 
-        mem/vport.cc
-
-	sim/pseudo_inst.cc
-        ''')
-	#dev/sinic.cc
-        #dev/i8254xGBe.cc
-
-if env['TARGET_ISA'] == 'alpha':
-    full_system_sources += Split('''
-	kern/tru64/dump_mbuf.cc
-	kern/tru64/printf.cc
-	kern/tru64/tru64_events.cc
-	kern/tru64/tru64_syscalls.cc
-        ''')
-
-# Syscall emulation (non-full-system) sources
-syscall_emulation_sources = Split('''
-        mem/translating_port.cc
-        mem/page_table.cc
-	sim/process.cc
-	sim/syscall_emul.cc
-        ''')
-
-#if env['TARGET_ISA'] == 'alpha':
-#    syscall_emulation_sources += Split('''
-#        kern/tru64/tru64.cc
-#        ''')
+sources = []
+def Source(*args):
+    for arg in args:
+        if isinstance(arg, (list, tuple)):
+            # Recurse to load a list
+            Source(*arg)
+        elif isinstance(arg, str):
+            sources.extend([ File(f) for f in Split(arg) ])
+        else:
+            sources.append(File(arg))
 
-memtest_sources = Split('''
-	cpu/memtest/memtest.cc
-        ''')
+Export('env')
+Export('Source')
 
 # Include file paths are rooted in this directory.  SCons will
 # automatically expand '.' to refer to both the source directory and
@@ -229,52 +61,23 @@ env.Append(CPPPATH=Dir('.'))
 # Add a flag defining what THE_ISA should be for all compilation
 env.Append(CPPDEFINES=[('THE_ISA','%s_ISA' % env['TARGET_ISA'].upper())])
 
-arch_sources = SConscript(os.path.join('arch', 'SConscript'), exports = 'env')
-
-cpu_sources = SConscript(os.path.join('cpu', 'SConscript'), exports = 'env')
-
-if env['FULL_SYSTEM']:
-    dev_sources = SConscript(os.path.join('dev', 'SConscript'),
-                             exports = 'env')
-    full_system_sources += dev_sources
-
-    kern_sources = SConscript(os.path.join('kern', 'SConscript'),
-                              exports = 'env')
-    full_system_sources += kern_sources
-
-# Set up complete list of sources based on configuration.
-sources = base_sources + arch_sources + cpu_sources
-
-# encumbered should be last because we're adding to some of the other groups
-if isfile(joinpath(env['SRCDIR'], 'encumbered/SConscript')):
-    sources += SConscript('encumbered/SConscript', exports = 'env')
-
-
-if env['FULL_SYSTEM']:
-    sources += full_system_sources
-else:
-    sources += syscall_emulation_sources
-
-if env['USE_MYSQL']:
-    sources += mysql_sources
+# Walk the tree and execute all SConscripts
+scripts = []
+srcdir = env['SRCDIR']
+for root, dirs, files in os.walk(srcdir, topdown=True):
+    if root == srcdir:
+        # we don't want to recurse back into this SConscript
+        continue
+    
+    if 'SConscript' in files:
+        # strip off the srcdir part since scons will try to find the
+        # script in the build directory
+        base = root[len(srcdir) + 1:]
+        SConscript(joinpath(base, 'SConscript'))
 
 for opt in env.ExportOptions:
     env.ConfigFile(opt)
 
-###################################################
-#
-# Special build rules.
-#
-###################################################
-
-# base/traceflags.{cc,hh} are generated from base/traceflags.py.
-# $TARGET.base will expand to "<build-dir>/base/traceflags".
-env.Command(Split('base/traceflags.hh base/traceflags.cc'),
-            'base/traceflags.py',
-            'python $SOURCE $TARGET.base')
-
-SConscript('python/SConscript', exports = ['env'])
-
 # This function adds the specified sources to the given build
 # environment, and returns a list of all the corresponding SCons
 # Object nodes (including an extra one for date.cc).  We explicitly
diff --git a/src/arch/SConscript b/src/arch/SConscript
index 74be5f8d1..c3ff69f46 100644
--- a/src/arch/SConscript
+++ b/src/arch/SConscript
@@ -28,13 +28,9 @@
 #
 # Authors: Steve Reinhardt
 
-import os.path, sys
+import sys
 
-# Import build environment variable from SConstruct.
-Import('env')
-
-# Right now there are no source files immediately in this directory
-sources = []
+Import('*')
 
 #################################################################
 #
@@ -66,7 +62,7 @@ isa_switch_hdrs = Split('''
         ''')
 
 # Set up this directory to support switching headers
-env.make_switching_dir('arch', isa_switch_hdrs, env)
+make_switching_dir('arch', isa_switch_hdrs, env)
 
 #################################################################
 #
@@ -100,7 +96,7 @@ execfile(cpu_models_file.srcnode().abspath)
 
 # Several files are generated from the ISA description.
 # We always get the basic decoder and header file.
-isa_desc_gen_files = Split('decoder.cc decoder.hh')
+isa_desc_gen_files = [ 'decoder.cc', 'decoder.hh' ]
 # We also get an execute file for each selected CPU model.
 isa_desc_gen_files += [CpuModel.dict[cpu].filename
                        for cpu in env['CPU_MODELS']]
@@ -128,14 +124,3 @@ else:
                                emitter = isa_desc_emitter)
 
 env.Append(BUILDERS = { 'ISADesc' : isa_desc_builder })
-
-#
-# Now include other ISA-specific sources from the ISA subdirectories.
-#
-
-isa = env['TARGET_ISA'] # someday this may be a list of ISAs
-
-# Let the target architecture define what additional sources it needs
-sources += SConscript(os.path.join(isa, 'SConscript'), exports = 'env')
-
-Return('sources')
diff --git a/src/arch/alpha/SConscript b/src/arch/alpha/SConscript
index addd49884..61611e9f6 100644
--- a/src/arch/alpha/SConscript
+++ b/src/arch/alpha/SConscript
@@ -29,76 +29,45 @@
 # Authors: Gabe Black
 #          Steve Reinhardt
 
-import os
-import sys
-from os.path import isdir
+Import('*')
 
-# This file defines how to build a particular configuration of M5
-# based on variable settings in the 'env' build environment.
+if env['TARGET_ISA'] == 'alpha':
+    Source('faults.cc')
+    Source('floatregfile.cc')
+    Source('intregfile.cc')
+    Source('miscregfile.cc')
+    Source('regfile.cc')
+    Source('remote_gdb.cc')
 
-# Import build environment variable from SConstruct.
-Import('env')
+    if env['FULL_SYSTEM']:
+        Source('arguments.cc')
+        Source('ev5.cc')
+        Source('idle_event.cc')
+        Source('ipr.cc')
+        Source('kernel_stats.cc')
+        Source('osfpal.cc')
+        Source('pagetable.cc')
+        Source('stacktrace.cc')
+        Source('system.cc')
+        Source('tlb.cc')
+        Source('vtophys.cc')
 
-###################################################
-#
-# Define needed sources.
-#
-###################################################
-
-# Base sources used by all configurations.
-base_sources = Split('''
-	faults.cc
-	floatregfile.cc
-	intregfile.cc
-	miscregfile.cc
-	regfile.cc
-	remote_gdb.cc
-	''')
-
-# Full-system sources
-full_system_sources = Split('''
-	arguments.cc
-	ev5.cc
-	freebsd/system.cc
-	idle_event.cc
-	ipr.cc
-	kernel_stats.cc
-	linux/system.cc
-	osfpal.cc
-	pagetable.cc
-	stacktrace.cc
-	system.cc
-	tlb.cc
-	tru64/system.cc
-	vtophys.cc
-	''')
-
-
-# Syscall emulation (non-full-system) sources
-syscall_emulation_sources = Split('''
-        linux/linux.cc
-	linux/process.cc
-        tru64/tru64.cc
-	tru64/process.cc
-	process.cc
-	''')
-
-# Set up complete list of sources based on configuration.
-sources = base_sources
+        Source('freebsd/system.cc')
+        Source('linux/system.cc')
+        Source('tru64/system.cc')
 
-if env['FULL_SYSTEM']:
-    sources += full_system_sources
-else:
-    sources += syscall_emulation_sources
+    else:
+        Source('process.cc')
 
-# Convert file names to SCons File objects.  This takes care of the
-# path relative to the top of the directory tree.
-sources = [File(s) for s in sources]
+        Source('linux/linux.cc')
+        Source('linux/process.cc')
 
-# Add in files generated by the ISA description.
-isa_desc_files = env.ISADesc('isa/main.isa')
-# Only non-header files need to be compiled.
-isa_desc_sources = [f for f in isa_desc_files if not f.path.endswith('.hh')]
-sources += isa_desc_sources
+        Source('tru64/tru64.cc')
+        Source('tru64/process.cc')
 
-Return('sources')
+    # Add in files generated by the ISA description.
+    isa_desc_files = env.ISADesc('isa/main.isa')
+    # Only non-header files need to be compiled.
+    for f in isa_desc_files:
+        if not f.path.endswith('.hh'):
+            Source(f)
diff --git a/src/arch/alpha/SConsopts b/src/arch/alpha/SConsopts
new file mode 100644
index 000000000..633eeb06f
--- /dev/null
+++ b/src/arch/alpha/SConsopts
@@ -0,0 +1,37 @@
+# -*- mode:python -*-
+
+# Copyright (c) 2004-2005 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
+
+Import('*')
+
+all_isa_list.append('alpha')
+
+# Alpha can be compiled with Turbolaser support instead of Tsunami
+sticky_opts.Add(BoolOption('ALPHA_TLASER',
+    'Model Alpha TurboLaser platform (vs. Tsunami)', False))
diff --git a/src/arch/mips/SConscript b/src/arch/mips/SConscript
index 8353bcde7..f959951b3 100644
--- a/src/arch/mips/SConscript
+++ b/src/arch/mips/SConscript
@@ -30,54 +30,25 @@
 #          Steve Reinhardt
 #          Korey Sewell
 
-import os
-import sys
-from os.path import isdir
-
-# Import build environment variable from SConstruct.
-Import('env')
-
-###################################################
-#
-# Define needed sources.
-#
-###################################################
-
-# Base sources used by all configurations.
-base_sources = Split('''
-	faults.cc
-	isa_traits.cc
-        utility.cc
-	''')
-
-# Full-system sources
-full_system_sources = Split('''
-	#Insert Full-System Files Here
-	''')
-
-# Syscall emulation (non-full-system) sources
-syscall_emulation_sources = Split('''
-        linux/linux.cc
-	linux/process.cc
-        process.cc
-	''')
-
-# Set up complete list of sources based on configuration.
-sources = base_sources
-
-if env['FULL_SYSTEM']:
-    sources += full_system_sources
-else:
-    sources += syscall_emulation_sources
-
-# Convert file names to SCons File objects.  This takes care of the
-# path relative to the top of the directory tree.
-sources = [File(s) for s in sources]
-
-# Add in files generated by the ISA description.
-isa_desc_files = env.ISADesc('isa/main.isa')
-# Only non-header files need to be compiled.
-isa_desc_sources = [f for f in isa_desc_files if not f.path.endswith('.hh')]
-sources += isa_desc_sources
-
-Return('sources')
+Import('*')
+
+if env['TARGET_ISA'] == 'mips':
+    Source('faults.cc')
+    Source('isa_traits.cc')
+    Source('utility.cc')
+
+    if env['FULL_SYSTEM']:
+        #Insert Full-System Files Here
+        pass
+    else:
+        Source('process.cc')
+
+        Source('linux/linux.cc')
+        Source('linux/process.cc')
+
+    # Add in files generated by the ISA description.
+    isa_desc_files = env.ISADesc('isa/main.isa')
+    # Only non-header files need to be compiled.
+    for f in isa_desc_files:
+        if not f.path.endswith('.hh'):
+            Source(f)
diff --git a/src/arch/mips/SConsopts b/src/arch/mips/SConsopts
new file mode 100644
index 000000000..744fc9cca
--- /dev/null
+++ b/src/arch/mips/SConsopts
@@ -0,0 +1,33 @@
+# -*- mode:python -*-
+
+# Copyright (c) 2006 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
+
+Import('*')
+
+all_isa_list.append('mips')
diff --git a/src/arch/sparc/SConscript b/src/arch/sparc/SConscript
index 9f1e798bb..e342c79cf 100644
--- a/src/arch/sparc/SConscript
+++ b/src/arch/sparc/SConscript
@@ -29,66 +29,38 @@
 # Authors: Gabe Black
 #          Steve Reinhardt
 
-import os
-import sys
-from os.path import isdir
+Import('*')
 
-# Import build environment variable from SConstruct.
-Import('env')
+if env['TARGET_ISA'] == 'sparc':
+    Source('asi.cc')
+    Source('faults.cc')
+    Source('floatregfile.cc')
+    Source('intregfile.cc')
+    Source('miscregfile.cc')
+    Source('regfile.cc')
+    Source('remote_gdb.cc')
 
-###################################################
-#
-# Define needed sources.
-#
-###################################################
-
-# Base sources used by all configurations.
-base_sources = Split('''
-	asi.cc
-	faults.cc
-	floatregfile.cc
-	intregfile.cc
-	miscregfile.cc
-	regfile.cc
-	remote_gdb.cc
-	''')
-
-# Full-system sources
-full_system_sources = Split('''
-	arguments.cc
-        pagetable.cc
-	stacktrace.cc
-	system.cc
-	tlb.cc
-        ua2005.cc
-	vtophys.cc
-	''')
-
-# Syscall emulation (non-full-system) sources
-syscall_emulation_sources = Split('''
-	linux/linux.cc
-	linux/process.cc
-	linux/syscalls.cc
-	process.cc
-	solaris/process.cc
-	solaris/solaris.cc
-	''')
-
-sources = base_sources
-
-if env['FULL_SYSTEM']:
-    sources += full_system_sources
-else:
-    sources += syscall_emulation_sources
+    if env['FULL_SYSTEM']:
+        Source('arguments.cc')
+        Source('pagetable.cc')
+        Source('stacktrace.cc')
+        Source('system.cc')
+        Source('tlb.cc')
+        Source('ua2005.cc')
+        Source('vtophys.cc')
+    else:
+        Source('process.cc')
 
-# Convert file names to SCons File objects.  This takes care of the
-# path relative to the top of the directory tree.
-sources = [File(s) for s in sources]
+        Source('linux/linux.cc')
+        Source('linux/process.cc')
+        Source('linux/syscalls.cc')
 
-# Add in files generated by the ISA description.
-isa_desc_files = env.ISADesc('isa/main.isa')
-# Only non-header files need to be compiled.
-isa_desc_sources = [f for f in isa_desc_files if not f.path.endswith('.hh')]
-sources += isa_desc_sources
+        Source('solaris/process.cc')
+        Source('solaris/solaris.cc')
 
-Return('sources')
+    # Add in files generated by the ISA description.
+    isa_desc_files = env.ISADesc('isa/main.isa')
+    # Only non-header files need to be compiled.
+    for f in isa_desc_files:
+        if not f.path.endswith('.hh'):
+            Source(f)
diff --git a/src/arch/sparc/SConsopts b/src/arch/sparc/SConsopts
new file mode 100644
index 000000000..c35606281
--- /dev/null
+++ b/src/arch/sparc/SConsopts
@@ -0,0 +1,33 @@
+# -*- mode:python -*-
+
+# Copyright (c) 2006 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
+
+Import('*')
+
+all_isa_list.append('sparc')
diff --git a/src/arch/x86/SConscript b/src/arch/x86/SConscript
index fff29ba89..f49225758 100644
--- a/src/arch/x86/SConscript
+++ b/src/arch/x86/SConscript
@@ -83,55 +83,28 @@
 #
 # Authors: Gabe Black
 
-import os
-import sys
-from os.path import isdir
+Import('*')
 
-# Import build environment variable from SConstruct.
-Import('env')
+if env['TARGET_ISA'] == 'x86':
+    Source('floatregfile.cc')
+    Source('intregfile.cc')
+    Source('miscregfile.cc')
+    Source('regfile.cc')
+    Source('remote_gdb.cc')
 
-###################################################
-#
-# Define needed sources.
-#
-###################################################
-
-# Base sources used by all configurations.
-base_sources = Split('''
-	floatregfile.cc
-	intregfile.cc
-	miscregfile.cc
-	regfile.cc
-	remote_gdb.cc
-	''')
-
-# Full-system sources
-full_system_sources = Split('''
-	''')
-
-# Syscall emulation (non-full-system) sources
-syscall_emulation_sources = Split('''
-	linux/linux.cc
-	linux/process.cc
-	linux/syscalls.cc
-	process.cc
-	''')
-
-sources = base_sources
-
-if env['FULL_SYSTEM']:
-    sources += full_system_sources
-else:
-    sources += syscall_emulation_sources
-
-# Convert file names to SCons File objects.  This takes care of the
-# path relative to the top of the directory tree.
-sources = [File(s) for s in sources]
+    if env['FULL_SYSTEM']:
+        # Full-system sources
+        pass
+    else:
+        Source('process.cc')
 
-# Add in files generated by the ISA description.
-isa_desc_files = env.ISADesc('isa/main.isa')
-# Only non-header files need to be compiled.
-isa_desc_sources = [f for f in isa_desc_files if not f.path.endswith('.hh')]
-sources += isa_desc_sources
+        Source('linux/linux.cc')
+        Source('linux/process.cc')
+        Source('linux/syscalls.cc')
 
-Return('sources')
+    # Add in files generated by the ISA description.
+    isa_desc_files = env.ISADesc('isa/main.isa')
+    # Only non-header files need to be compiled.
+    for f in isa_desc_files:
+        if not f.path.endswith('.hh'):
+            Source(f)
diff --git a/src/arch/x86/SConsopts b/src/arch/x86/SConsopts
new file mode 100644
index 000000000..d8b7cbed1
--- /dev/null
+++ b/src/arch/x86/SConsopts
@@ -0,0 +1,60 @@
+# -*- mode:python -*-
+
+# Copyright (c) 2007 The Hewlett-Packard Development Company
+# All rights reserved.
+#
+# Redistribution and use of this software in source and binary forms,
+# with or without modification, are permitted provided that the
+# following conditions are met:
+#
+# The software must be used only for Non-Commercial Use which means any
+# use which is NOT directed to receiving any direct monetary
+# compensation for, or commercial advantage from such use.  Illustrative
+# examples of non-commercial use are academic research, personal study,
+# teaching, education and corporate research & development.
+# Illustrative examples of commercial use are distributing products for
+# commercial advantage and providing services using the software for
+# commercial advantage.
+#
+# If you wish to use this software or functionality therein that may be
+# covered by patents for commercial use, please contact:
+#     Director of Intellectual Property Licensing
+#     Office of Strategy and Technology
+#     Hewlett-Packard Company
+#     1501 Page Mill Road
+#     Palo Alto, California  94304
+#
+# 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 HOLDER(s), HEWLETT-PACKARD COMPANY, nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.  No right of
+# sublicense is granted herewith.  Derivatives of the software and
+# output created using the software may be prepared, but only for
+# Non-Commercial Uses.  Derivatives of the software may be shared with
+# others provided: (i) the others agree to abide by the list of
+# conditions herein which includes the Non-Commercial Use restrictions;
+# and (ii) such Derivatives of the software include the above copyright
+# notice to acknowledge the contribution from this software where
+# applicable, this list of conditions and the disclaimer below.
+#
+# 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: Gabe Black
+
+Import('*')
+
+all_isa_list.append('x86')
diff --git a/src/base/SConscript b/src/base/SConscript
new file mode 100644
index 000000000..788aa3e6f
--- /dev/null
+++ b/src/base/SConscript
@@ -0,0 +1,83 @@
+# -*- mode:python -*-
+
+# Copyright (c) 2006 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
+
+Import('*')
+
+# base/traceflags.{cc,hh} are generated from base/traceflags.py.
+# $TARGET.base will expand to "<build-dir>/base/traceflags".
+env.Command(['traceflags.hh', 'traceflags.cc'], 'traceflags.py',
+            'python $SOURCE $TARGET.base')
+
+Source('annotate.cc')
+Source('bigint.cc')
+Source('circlebuf.cc')
+Source('cprintf.cc')
+Source('crc.cc')
+Source('fast_alloc.cc')
+Source('fifo_buffer.cc')
+Source('hostinfo.cc')
+Source('hybrid_pred.cc')
+Source('inet.cc')
+Source('inifile.cc')
+Source('intmath.cc')
+Source('match.cc')
+Source('misc.cc')
+Source('output.cc')
+Source('pollevent.cc')
+Source('random.cc')
+Source('range.cc')
+Source('remote_gdb.cc')
+Source('sat_counter.cc')
+Source('socket.cc')
+Source('statistics.cc')
+Source('str.cc')
+Source('time.cc')
+Source('trace.cc')
+Source('traceflags.cc')
+Source('userinfo.cc')
+
+Source('compression/lzss_compression.cc')
+
+Source('loader/aout_object.cc')
+Source('loader/ecoff_object.cc')
+Source('loader/elf_object.cc')
+Source('loader/object_file.cc')
+Source('loader/raw_object.cc')
+Source('loader/symtab.cc')
+
+Source('stats/events.cc')
+Source('stats/output.cc')
+Source('stats/statdb.cc')
+Source('stats/text.cc')
+Source('stats/visit.cc')
+
+if env['USE_MYSQL']:
+    Source('mysql.cc')
+    Source('stats/mysql.cc')
diff --git a/src/cpu/SConscript b/src/cpu/SConscript
index 4d4b7574c..1c2278f6f 100644
--- a/src/cpu/SConscript
+++ b/src/cpu/SConscript
@@ -28,11 +28,7 @@
 #
 # Authors: Steve Reinhardt
 
-import os
-import os.path
-
-# Import build environment variable from SConstruct.
-Import('env')
+Import('*')
 
 #################################################################
 #
@@ -107,89 +103,24 @@ env.Depends('static_inst_exec_sigs.hh', Value(env['CPU_MODELS']))
 # and one of these are not being used.
 CheckerSupportedCPUList = ['O3CPU', 'OzoneCPU']
 
-#################################################################
-#
-# Include CPU-model-specific files based on set of models
-# specified in CPU_MODELS build option.
-#
-#################################################################
-
-# Keep a list of CPU models that support SMT
-env['SMT_CPU_MODELS'] = []
-
-sources = []
-
-need_simple_base = False
-if 'AtomicSimpleCPU' in env['CPU_MODELS']:
-    need_simple_base = True
-    sources += Split('simple/atomic.cc')
-
-if 'TimingSimpleCPU' in env['CPU_MODELS']:
-    need_simple_base = True
-    sources += Split('simple/timing.cc')
-
-if need_simple_base:
-    sources += Split('simple/base.cc')
-
-if 'FastCPU' in env['CPU_MODELS']:
-    sources += Split('fast/cpu.cc')
-
-need_bp_unit = False
-if 'O3CPU' in env['CPU_MODELS']:
-    need_bp_unit = True
-    sources += SConscript('o3/SConscript', exports = 'env')
-    sources += Split('''
-        o3/base_dyn_inst.cc
-        o3/bpred_unit.cc
-        o3/commit.cc
-        o3/decode.cc
-        o3/fetch.cc
-        o3/free_list.cc
-        o3/fu_pool.cc
-        o3/cpu.cc
-        o3/iew.cc
-        o3/inst_queue.cc
-        o3/lsq_unit.cc
-        o3/lsq.cc
-        o3/mem_dep_unit.cc
-        o3/rename.cc
-        o3/rename_map.cc
-        o3/rob.cc
-        o3/scoreboard.cc
-        o3/store_set.cc
-        ''')
-    sources += Split('memtest/memtest.cc')
-    if env['USE_CHECKER']:
-        sources += Split('o3/checker_builder.cc')
-    else:
-        env['SMT_CPU_MODELS'].append('O3CPU') # Checker doesn't support SMT right now
-
-if 'OzoneCPU' in env['CPU_MODELS']:
-    need_bp_unit = True
-    sources += Split('''
-        ozone/base_dyn_inst.cc
-        ozone/bpred_unit.cc
-        ozone/cpu.cc
-        ozone/cpu_builder.cc
-        ozone/dyn_inst.cc
-        ozone/front_end.cc
-        ozone/lw_back_end.cc
-        ozone/lw_lsq.cc
-        ozone/rename_table.cc
-        ''')
-    if env['USE_CHECKER']:
-        sources += Split('ozone/checker_builder.cc')
-
-if need_bp_unit:
-    sources += Split('''
-        o3/2bit_local_pred.cc
-        o3/btb.cc
-        o3/ras.cc
-        o3/tournament_pred.cc
-        ''')
+Source('activity.cc')
+Source('base.cc')
+Source('cpuevent.cc')
+Source('exetrace.cc')
+Source('func_unit.cc')
+Source('op_class.cc')
+Source('pc_event.cc')
+Source('quiesce_event.cc')
+Source('static_inst.cc')
+Source('simple_thread.cc')
+Source('thread_state.cc')
+
+if env['FULL_SYSTEM']:
+    Source('intr_control.cc')
+    Source('profile.cc')
 
 if env['USE_CHECKER']:
-    sources += Split('checker/cpu.cc')
+    Source('checker/cpu.cc')
     checker_supports = False
     for i in CheckerSupportedCPUList:
         if i in env['CPU_MODELS']:
@@ -198,16 +129,5 @@ if env['USE_CHECKER']:
         print "Checker only supports CPU models",
         for i in CheckerSupportedCPUList:
             print i,
-        print ", please set USE_CHECKER=False or use one of those CPU models"              
+        print ", please set USE_CHECKER=False or use one of those CPU models"
         Exit(1)
-
-
-# FullCPU sources are included from src/SConscript since they're not
-# below this point in the file hierarchy.
-
-# Convert file names to SCons File objects.  This takes care of the
-# path relative to the top of the directory tree.
-sources = [File(s) for s in sources]
-
-Return('sources')
-
diff --git a/src/cpu/memtest/SConscript b/src/cpu/memtest/SConscript
new file mode 100644
index 000000000..7b4d6d2c5
--- /dev/null
+++ b/src/cpu/memtest/SConscript
@@ -0,0 +1,34 @@
+# -*- mode:python -*-
+
+# Copyright (c) 2006 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
+
+Import('*')
+
+if 'O3CPU' in env['CPU_MODELS']:
+    Source('memtest.cc')
diff --git a/src/cpu/o3/SConscript b/src/cpu/o3/SConscript
index afbd4c533..bb1dfb613 100755
--- a/src/cpu/o3/SConscript
+++ b/src/cpu/o3/SConscript
@@ -26,52 +26,56 @@
 # (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: Korey Sewell
+# Authors: Nathan Binkert
 
-import os
-import os.path
 import sys
 
-# Import build environment variable from SConstruct.
-Import('env')
+Import('*')
 
+if 'O3CPU' in env['CPU_MODELS']:
+    Source('base_dyn_inst.cc')
+    Source('bpred_unit.cc')
+    Source('commit.cc')
+    Source('cpu.cc')
+    Source('decode.cc')
+    Source('fetch.cc')
+    Source('free_list.cc')
+    Source('fu_pool.cc')
+    Source('iew.cc')
+    Source('inst_queue.cc')
+    Source('lsq.cc')
+    Source('lsq_unit.cc')
+    Source('mem_dep_unit.cc')
+    Source('rename.cc')
+    Source('rename_map.cc')
+    Source('rob.cc')
+    Source('scoreboard.cc')
+    Source('store_set.cc')
 
-#################################################################
-#
-# Include ISA-specific files for the O3 CPU-model
-#
-#################################################################
-
-sources = []
-
-if env['TARGET_ISA'] == 'alpha':
-    sources += Split('''
-        alpha/dyn_inst.cc
-        alpha/cpu.cc
-        alpha/thread_context.cc
-        alpha/cpu_builder.cc
-        ''')
-elif env['TARGET_ISA'] == 'mips':
-    sources += Split('''
-        mips/dyn_inst.cc
-        mips/cpu.cc
-        mips/thread_context.cc
-        mips/cpu_builder.cc
-        ''')
-elif env['TARGET_ISA'] == 'sparc':
-    sources += Split('''
-        sparc/dyn_inst.cc
-        sparc/cpu.cc
-        sparc/thread_context.cc
-        sparc/cpu_builder.cc
-        ''')
-else:
-    sys.exit('O3 CPU does not support the \'%s\' ISA' % env['TARGET_ISA'])
-
+    if env['TARGET_ISA'] == 'alpha':
+        Source('alpha/cpu.cc')
+        Source('alpha/cpu_builder.cc')
+        Source('alpha/dyn_inst.cc')
+        Source('alpha/thread_context.cc')
+    elif env['TARGET_ISA'] == 'mips':
+        Source('mips/cpu.cc')
+        Source('mips/cpu_builder.cc')
+        Source('mips/dyn_inst.cc')
+        Source('mips/thread_context.cc')
+    elif env['TARGET_ISA'] == 'sparc':
+        Source('sparc/cpu.cc')
+        Source('sparc/cpu_builder.cc')
+        Source('sparc/dyn_inst.cc')
+        Source('sparc/thread_context.cc')
+    else:
+        sys.exit('O3 CPU does not support the \'%s\' ISA' % env['TARGET_ISA'])
 
-# Convert file names to SCons File objects.  This takes care of the
-# path relative to the top of the directory tree.
-sources = [File(s) for s in sources]
+    if env['USE_CHECKER']:
+        Source('checker_builder.cc')
 
-Return('sources')
+if 'O3CPU' in env['CPU_MODELS'] or 'OzoneCPU' in env['CPU_MODELS']:
+    Source('2bit_local_pred.cc')
+    Source('btb.cc')
+    Source('ras.cc')
+    Source('tournament_pred.cc')
 
diff --git a/src/cpu/o3/SConsopts b/src/cpu/o3/SConsopts
new file mode 100644
index 000000000..040352e6a
--- /dev/null
+++ b/src/cpu/o3/SConsopts
@@ -0,0 +1,34 @@
+# -*- mode:python -*-
+
+# Copyright (c) 2006 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
+
+Import('*')
+
+all_cpu_list.append('O3CPU')
+default_cpus.append('O3CPU')
diff --git a/src/cpu/ozone/SConscript b/src/cpu/ozone/SConscript
new file mode 100644
index 000000000..4a040684a
--- /dev/null
+++ b/src/cpu/ozone/SConscript
@@ -0,0 +1,45 @@
+# -*- mode:python -*-
+
+# Copyright (c) 2006 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
+
+Import('*')
+
+if 'OzoneCPU' in env['CPU_MODELS']:
+    need_bp_unit = True
+    Source('base_dyn_inst.cc')
+    Source('bpred_unit.cc')
+    Source('cpu.cc')
+    Source('cpu_builder.cc')
+    Source('dyn_inst.cc')
+    Source('front_end.cc')
+    Source('lw_back_end.cc')
+    Source('lw_lsq.cc')
+    Source('rename_table.cc')
+    if env['USE_CHECKER']:
+        Source('checker_builder.cc')
diff --git a/src/cpu/ozone/SConsopts b/src/cpu/ozone/SConsopts
new file mode 100644
index 000000000..341644dcd
--- /dev/null
+++ b/src/cpu/ozone/SConsopts
@@ -0,0 +1,33 @@
+# -*- mode:python -*-
+
+# Copyright (c) 2006 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
+
+Import('*')
+
+all_cpu_list.append('OzoneCPU')
diff --git a/src/cpu/simple/SConscript b/src/cpu/simple/SConscript
new file mode 100644
index 000000000..9a6a80473
--- /dev/null
+++ b/src/cpu/simple/SConscript
@@ -0,0 +1,43 @@
+# -*- mode:python -*-
+
+# Copyright (c) 2006 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
+
+Import('*')
+
+need_simple_base = False
+if 'AtomicSimpleCPU' in env['CPU_MODELS']:
+    need_simple_base = True
+    Source('atomic.cc')
+
+if 'TimingSimpleCPU' in env['CPU_MODELS']:
+    need_simple_base = True
+    Source('timing.cc')
+
+if need_simple_base:
+    Source('base.cc')
diff --git a/src/cpu/simple/SConsopts b/src/cpu/simple/SConsopts
new file mode 100644
index 000000000..32dbda1a5
--- /dev/null
+++ b/src/cpu/simple/SConsopts
@@ -0,0 +1,34 @@
+# -*- mode:python -*-
+
+# Copyright (c) 2006 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
+
+Import('*')
+
+all_cpu_list.extend(('AtomicSimpleCPU', 'TimingSimpleCPU'))
+default_cpus.extend(('AtomicSimpleCPU', 'TimingSimpleCPU'))
diff --git a/src/cpu/trace/SConscript b/src/cpu/trace/SConscript
new file mode 100644
index 000000000..f166b2f23
--- /dev/null
+++ b/src/cpu/trace/SConscript
@@ -0,0 +1,40 @@
+# -*- mode:python -*-
+
+# Copyright (c) 2006 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
+
+Import('*')
+
+if False:
+    Source('opt_cpu.cc')
+    Source('trace_cpu.cc')
+
+    Source('reader/mem_trace_reader.cc')
+    Source('reader/ibm_reader.cc')
+    Source('reader/itx_reader.cc')
+    Source('reader/m5_reader.cc')
diff --git a/src/dev/SConscript b/src/dev/SConscript
index 951bc29d1..1ec83de4b 100644
--- a/src/dev/SConscript
+++ b/src/dev/SConscript
@@ -29,51 +29,29 @@
 # Authors: Steve Reinhardt
 #          Gabe Black
 
-import os.path, sys
-
-# Import build environment variable from SConstruct.
-Import('env')
-
-# Right now there are no source files immediately in this directory
-sources = []
-
-#
-# Now include other ISA-specific sources from the ISA subdirectories.
-#
-
-isa = env['TARGET_ISA'] # someday this may be a list of ISAs
-
-#
-# These source files can be used by any architecture
-#
-
-sources += Split('''
-	baddev.cc
-	disk_image.cc
-	etherbus.cc
-	etherdump.cc
-	etherint.cc
-	etherlink.cc
-	etherpkt.cc
-	ethertap.cc	
-        ide_ctrl.cc
-	ide_disk.cc
-	io_device.cc
-	isa_fake.cc
-	ns_gige.cc
-	pciconfigall.cc
-	pcidev.cc
-	pktfifo.cc
-	platform.cc
-        simconsole.cc
-	simple_disk.cc
-	''')
-
-# Let the target architecture define what additional sources it needs
-sources += SConscript(os.path.join(isa, 'SConscript'), exports = 'env')
-
-# Convert file names to SCons File objects.  This takes care of the
-# path relative to the top of the directory tree.
-sources = [File(s) for s in sources]
-
-Return('sources')
+Import('*')
+
+if env['FULL_SYSTEM']:
+    Source('baddev.cc')
+    Source('disk_image.cc')
+    Source('etherbus.cc')
+    Source('etherdump.cc')
+    Source('etherint.cc')
+    Source('etherlink.cc')
+    Source('etherpkt.cc')
+    Source('ethertap.cc')	
+    #Source('i8254xGBe.cc')
+    Source('ide_ctrl.cc')
+    Source('ide_disk.cc')
+    Source('io_device.cc')
+    Source('isa_fake.cc')
+    Source('ns_gige.cc')
+    Source('pciconfigall.cc')
+    Source('pcidev.cc')
+    Source('pktfifo.cc')
+    Source('platform.cc')
+    Source('simconsole.cc')
+    Source('simple_disk.cc')
+    #Source('sinic.cc')
+    Source('uart.cc')
+    Source('uart8250.cc')
diff --git a/src/dev/alpha/SConscript b/src/dev/alpha/SConscript
index fb0e626d3..c985fdd9f 100644
--- a/src/dev/alpha/SConscript
+++ b/src/dev/alpha/SConscript
@@ -29,40 +29,11 @@
 # Authors: Steve Reinhardt
 #          Gabe Black
 
-import os.path, sys
+Import('*')
 
-# Import build environment variable from SConstruct.
-Import('env')
-
-sources = Split('''
-	console.cc
-	tsunami.cc
-	tsunami_cchip.cc
-	tsunami_io.cc
-	tsunami_pchip.cc
-	''')
-#	baddev.cc
-#	disk_image.cc
-#	etherbus.cc
-#	etherdump.cc
-#	etherint.cc
-#	etherlink.cc
-#	etherpkt.cc
-#	ethertap.cc	
-#       ide_ctrl.cc
-#	ide_disk.cc
-#	io_device.cc
-#	isa_fake.cc
-#	ns_gige.cc
-#	pciconfigall.cc
-#	pcidev.cc
-#	pktfifo.cc
-#	platform.cc
-#       simconsole.cc
-#	simple_disk.cc
-
-# Convert file names to SCons File objects.  This takes care of the
-# path relative to the top of the directory tree.
-sources = [File(s) for s in sources]
-
-Return('sources')
+if env['FULL_SYSTEM'] and env['TARGET_ISA'] == 'alpha':
+    Source('console.cc')
+    Source('tsunami.cc')
+    Source('tsunami_cchip.cc')
+    Source('tsunami_io.cc')
+    Source('tsunami_pchip.cc')
diff --git a/src/dev/sparc/SConscript b/src/dev/sparc/SConscript
index 4d63690c2..8511b16fb 100644
--- a/src/dev/sparc/SConscript
+++ b/src/dev/sparc/SConscript
@@ -29,22 +29,10 @@
 # Authors: Steve Reinhardt
 #          Gabe Black
 
-import os.path, sys
+Import('*')
 
-# Import build environment variable from SConstruct.
-Import('env')
-
-sources = []
-
-sources += Split('''
-	dtod.cc
-        iob.cc
-	t1000.cc
-	mm_disk.cc
-	''')
-
-# Convert file names to SCons File objects.  This takes care of the
-# path relative to the top of the directory tree.
-sources = [File(s) for s in sources]
-
-Return('sources')
+if env['FULL_SYSTEM'] and env['TARGET_ISA'] == 'sparc':
+    Source('dtod.cc')
+    Source('iob.cc')
+    Source('t1000.cc')
+    Source('mm_disk.cc')
diff --git a/src/kern/SConscript b/src/kern/SConscript
index 12df28836..eec8012a7 100644
--- a/src/kern/SConscript
+++ b/src/kern/SConscript
@@ -28,21 +28,18 @@
 #
 # Authors: Steve Reinhardt
 
-import os.path, sys
+Import('*')
 
-# Import build environment variable from SConstruct.
-Import('env')
+if env['FULL_SYSTEM']:
+    Source('kernel_stats.cc')
+    Source('system_events.cc')
 
-sources = Split('''
-	kernel_stats.cc
-	system_events.cc
-	linux/events.cc
-	linux/linux_syscalls.cc
-	linux/printk.cc
-	''')
+    Source('linux/events.cc')
+    Source('linux/linux_syscalls.cc')
+    Source('linux/printk.cc')
 
-# Convert file names to SCons File objects.  This takes care of the
-# path relative to the top of the directory tree.
-sources = [File(s) for s in sources]
-
-Return('sources')
+    if env['TARGET_ISA'] == 'alpha':
+        Source('tru64/dump_mbuf.cc')
+        Source('tru64/printf.cc')
+        Source('tru64/tru64_events.cc')
+        Source('tru64/tru64_syscalls.cc')
diff --git a/src/mem/SConscript b/src/mem/SConscript
new file mode 100644
index 000000000..61fb766d6
--- /dev/null
+++ b/src/mem/SConscript
@@ -0,0 +1,46 @@
+# -*- mode:python -*-
+
+# Copyright (c) 2006 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
+
+Import('*')
+
+Source('bridge.cc')
+Source('bus.cc')
+Source('dram.cc')
+Source('mem_object.cc')
+Source('packet.cc')
+Source('physical.cc')
+Source('port.cc')
+Source('tport.cc')
+
+if env['FULL_SYSTEM']:
+    Source('vport.cc')
+else:
+    Source('page_table.cc')
+    Source('translating_port.cc')
diff --git a/src/mem/cache/SConscript b/src/mem/cache/SConscript
new file mode 100644
index 000000000..7150719ad
--- /dev/null
+++ b/src/mem/cache/SConscript
@@ -0,0 +1,35 @@
+# -*- mode:python -*-
+
+# Copyright (c) 2006 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
+
+Import('*')
+
+Source('base_cache.cc')
+Source('cache.cc')
+Source('cache_builder.cc')
diff --git a/src/mem/cache/coherence/SConscript b/src/mem/cache/coherence/SConscript
new file mode 100644
index 000000000..03a2d85d7
--- /dev/null
+++ b/src/mem/cache/coherence/SConscript
@@ -0,0 +1,35 @@
+# -*- mode:python -*-
+
+# Copyright (c) 2006 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
+
+Import('*')
+
+Source('coherence_protocol.cc')
+Source('uni_coherence.cc')
+
diff --git a/src/mem/cache/miss/SConscript b/src/mem/cache/miss/SConscript
new file mode 100644
index 000000000..0f81a2570
--- /dev/null
+++ b/src/mem/cache/miss/SConscript
@@ -0,0 +1,37 @@
+# -*- mode:python -*-
+
+# Copyright (c) 2006 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
+
+Import('*')
+
+Source('blocking_buffer.cc')
+Source('miss_buffer.cc')
+Source('miss_queue.cc')
+Source('mshr.cc')
+Source('mshr_queue.cc')
diff --git a/src/mem/cache/prefetch/SConscript b/src/mem/cache/prefetch/SConscript
new file mode 100644
index 000000000..8a7f1232c
--- /dev/null
+++ b/src/mem/cache/prefetch/SConscript
@@ -0,0 +1,37 @@
+# -*- mode:python -*-
+
+# Copyright (c) 2006 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
+
+Import('*')
+
+Source('base_prefetcher.cc')
+Source('ghb_prefetcher.cc')
+Source('stride_prefetcher.cc')
+Source('tagged_prefetcher.cc')
+
diff --git a/src/mem/cache/tags/SConscript b/src/mem/cache/tags/SConscript
new file mode 100644
index 000000000..baf71f687
--- /dev/null
+++ b/src/mem/cache/tags/SConscript
@@ -0,0 +1,42 @@
+# -*- mode:python -*-
+
+# Copyright (c) 2006 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
+
+Import('*')
+
+Source('base_tags.cc')
+Source('fa_lru.cc')
+Source('iic.cc')
+Source('lru.cc')
+Source('split.cc')
+Source('split_lifo.cc')
+Source('split_lru.cc')
+
+Source('repl/gen.cc')
+Source('repl/repl.cc')
diff --git a/src/python/SConscript b/src/python/SConscript
index 94db1a747..6662c8a45 100644
--- a/src/python/SConscript
+++ b/src/python/SConscript
@@ -29,14 +29,14 @@
 # Authors: Steve Reinhardt
 #          Nathan Binkert
 
-import os, os.path, re, sys
-from zipfile import PyZipFile
+import os
+import zipfile
 
 # handy function for path joins
 def join(*args):
     return os.path.normpath(os.path.join(*args))
 
-Import('env')
+Import('*')
 
 # This SConscript is in charge of collecting .py files and generating
 # a zip archive that is appended to the m5 binary.
@@ -106,6 +106,11 @@ def swig_it(module):
                 '$SWIG $SWIGFLAGS -outdir ${TARGETS[1].dir} '
                 '-o ${TARGETS[0]} $SOURCES')
     swig_modules.append(module)
+    Source('swig/%s_wrap.cc' % module)
+
+Source('swig/init.cc')
+Source('swig/pyevent.cc')
+Source('swig/pyobject.cc')
 
 swig_it('core')
 swig_it('debug')
@@ -144,7 +149,7 @@ env.Command('swig/init.cc', swig_cc_files, MakeSwigInit)
 # Action function to build the zip archive.  Uses the PyZipFile module
 # included in the standard Python library.
 def buildPyZip(target, source, env):
-    pzf = PyZipFile(str(target[0]), 'w')
+    pzf = zipfile.PyZipFile(str(target[0]), 'w')
     for s in source:
         pzf.writepy(str(s))
 
diff --git a/src/sim/SConscript b/src/sim/SConscript
new file mode 100644
index 000000000..46dc2c8dd
--- /dev/null
+++ b/src/sim/SConscript
@@ -0,0 +1,54 @@
+# -*- mode:python -*-
+
+# Copyright (c) 2006 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
+
+Import('*')
+
+Source('async.cc')
+Source('builder.cc')
+Source('core.cc')
+Source('debug.cc')
+Source('eventq.cc')
+Source('faults.cc')
+Source('main.cc')
+Source('param.cc')
+Source('root.cc')
+Source('serialize.cc')
+Source('sim_events.cc')
+Source('sim_object.cc')
+Source('simulate.cc')
+Source('startup.cc')
+Source('stat_control.cc')
+Source('system.cc')
+
+if env['FULL_SYSTEM']:
+    Source('pseudo_inst.cc')
+else:
+    Source('process.cc')
+    Source('syscall_emul.cc')