diff --git a/tools/buildman/toolchain.py b/tools/buildman/toolchain.py
new file mode 100644
index 0000000..e0a6970
--- /dev/null
+++ b/tools/buildman/toolchain.py
@@ -0,0 +1,185 @@
+# Copyright (c) 2012 The Chromium OS Authors.
+#
+# See file CREDITS for list of people who contributed to this
+# project.
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License as
+# published by the Free Software Foundation; either version 2 of
+# the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+# MA 02111-1307 USA
+#
+
+import glob
+import os
+
+import bsettings
+import command
+
+class Toolchain:
+    """A single toolchain
+
+    Public members:
+        gcc: Full path to C compiler
+        path: Directory path containing C compiler
+        cross: Cross compile string, e.g. 'arm-linux-'
+        arch: Architecture of toolchain as determined from the first
+                component of the filename. E.g. arm-linux-gcc becomes arm
+    """
+
+    def __init__(self, fname, test, verbose=False):
+        """Create a new toolchain object.
+
+        Args:
+            fname: Filename of the gcc component
+            test: True to run the toolchain to test it
+        """
+        self.gcc = fname
+        self.path = os.path.dirname(fname)
+        self.cross = os.path.basename(fname)[:-3]
+        pos = self.cross.find('-')
+        self.arch = self.cross[:pos] if pos != -1 else 'sandbox'
+
+        env = self.MakeEnvironment()
+
+        # As a basic sanity check, run the C compiler with --version
+        cmd = [fname, '--version']
+        if test:
+            result = command.RunPipe([cmd], capture=True, env=env)
+            self.ok = result.return_code == 0
+            if verbose:
+                print 'Tool chain test: ',
+                if self.ok:
+                    print 'OK'
+                else:
+                    print 'BAD'
+                    print 'Command: ', cmd
+                    print result.stdout
+                    print result.stderr
+        else:
+            self.ok = True
+        self.priority = self.GetPriority(fname)
+
+    def GetPriority(self, fname):
+        """Return the priority of the toolchain.
+
+        Toolchains are ranked according to their suitability by their
+        filename prefix.
+
+        Args:
+            fname: Filename of toolchain
+        Returns:
+            Priority of toolchain, 0=highest, 20=lowest.
+        """
+        priority_list = ['-elf', '-unknown-linux-gnu', '-linux', '-elf',
+            '-none-linux-gnueabi', '-uclinux', '-none-eabi',
+            '-gentoo-linux-gnu', '-linux-gnueabi', '-le-linux', '-uclinux']
+        for prio in range(len(priority_list)):
+            if priority_list[prio] in fname:
+                return prio
+        return prio
+
+    def MakeEnvironment(self):
+        """Returns an environment for using the toolchain.
+
+        Thie takes the current environment, adds CROSS_COMPILE and
+        augments PATH so that the toolchain will operate correctly.
+        """
+        env = dict(os.environ)
+        env['CROSS_COMPILE'] = self.cross
+        env['PATH'] += (':' + self.path)
+        return env
+
+
+class Toolchains:
+    """Manage a list of toolchains for building U-Boot
+
+    We select one toolchain for each architecture type
+
+    Public members:
+        toolchains: Dict of Toolchain objects, keyed by architecture name
+        paths: List of paths to check for toolchains (may contain wildcards)
+    """
+
+    def __init__(self):
+        self.toolchains = {}
+        self.paths = []
+        for name, value in bsettings.GetItems('toolchain'):
+            if '*' in value:
+                self.paths += glob.glob(value)
+            else:
+                self.paths.append(value)
+
+
+    def Add(self, fname, test=True, verbose=False):
+        """Add a toolchain to our list
+
+        We select the given toolchain as our preferred one for its
+        architecture if it is a higher priority than the others.
+
+        Args:
+            fname: Filename of toolchain's gcc driver
+            test: True to run the toolchain to test it
+        """
+        toolchain = Toolchain(fname, test, verbose)
+        add_it = toolchain.ok
+        if toolchain.arch in self.toolchains:
+            add_it = (toolchain.priority <
+                        self.toolchains[toolchain.arch].priority)
+        if add_it:
+            self.toolchains[toolchain.arch] = toolchain
+
+    def Scan(self, verbose):
+        """Scan for available toolchains and select the best for each arch.
+
+        We look for all the toolchains we can file, figure out the
+        architecture for each, and whether it works. Then we select the
+        highest priority toolchain for each arch.
+
+        Args:
+            verbose: True to print out progress information
+        """
+        if verbose: print 'Scanning for tool chains'
+        for path in self.paths:
+            if verbose: print "   - scanning path '%s'" % path
+            for subdir in ['.', 'bin', 'usr/bin']:
+                dirname = os.path.join(path, subdir)
+                if verbose: print "      - looking in '%s'" % dirname
+                for fname in glob.glob(dirname + '/*gcc'):
+                    if verbose: print "         - found '%s'" % fname
+                    self.Add(fname, True, verbose)
+
+    def List(self):
+        """List out the selected toolchains for each architecture"""
+        print 'List of available toolchains (%d):' % len(self.toolchains)
+        if len(self.toolchains):
+            for key, value in sorted(self.toolchains.iteritems()):
+                print '%-10s: %s' % (key, value.gcc)
+        else:
+            print 'None'
+
+    def Select(self, arch):
+        """Returns the toolchain for a given architecture
+
+        Args:
+            args: Name of architecture (e.g. 'arm', 'ppc_8xx')
+
+        returns:
+            toolchain object, or None if none found
+        """
+        for name, value in bsettings.GetItems('toolchain-alias'):
+            if arch == name:
+                arch = value
+
+        if not arch in self.toolchains:
+            raise ValueError, ("No tool chain found for arch '%s'" % arch)
+        return self.toolchains[arch]