diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..b3cd313
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,91 @@
+#
+#    Copyright (c) 2013 Nest Labs, Inc.
+#    All rights reserved.
+#
+#    This document is the property of Nest. It is considered
+#    confidential and proprietary information.
+#
+#    This document may not be reproduced or transmitted in any form,
+#    in whole or in part, without the express written permission of
+#    Nest.
+#
+#    Description:
+#      This file is the make file for various FreeBSD user- and
+#      kernel-space sources.
+#
+
+BuildConfigSpecialized		:= No
+BuildProductSpecialized 	:= No
+
+.DEFAULT_GOAL			:= all
+
+include pre.mak
+
+PackageRoot			:= .
+
+PackageName			:= freebsd
+
+PackagePatchArgs		:= -p1
+
+PackageSourceDir		:= $(PackageRoot)/$(PackageName)
+
+FreeBSDMakefile			:= $(PackageName).mak
+
+LicenseSourceFile		:= $(PackageSourceDir)/COPYRIGHT
+
+CleanPaths			+= $(PackageLicenseFile)
+
+export PackageSourceDir
+export PackageName
+
+all: $(PackageDefaultGoal)
+
+# Generate the package license contents.
+
+$(LicenseSourceFile): source
+
+$(PackageLicenseFile): $(LicenseSourceFile)
+	$(copy-result)
+
+# We are building this package from version-controlled source, so
+# there is nothing to do for this target goal.
+
+$(PackageSourceDir):
+
+# Prepare the sources.
+
+.PHONY: source
+source: | $(PackageSourceDir)
+
+# Patch the sources, if necessary.
+
+.PHONY: patch
+patch: source
+
+# Configure the source for building.
+
+.PHONY: configure
+configure: patch
+
+# Build the source.
+#
+# Because we've just cherry-picked select FreeBSD sources and those
+# does not have any make or build infrastructure of their own, we
+# delegate the entirety of making FreeBSD to another adjunct make file
+# of our own.
+
+.PHONY: build
+build: configure
+	$(Verbose)$(MAKE) -f $(FreeBSDMakefile) all
+
+# Stage the build to a temporary installation area.
+#
+# There's nothing to do as the adjunct make file handles everything.
+
+.PHONY: stage
+stage: build
+
+clean:
+	$(Verbose)$(MAKE) -s -f $(FreeBSDMakefile) $(@)
+
+include post.mak
diff --git a/freebsd.mak b/freebsd.mak
new file mode 100644
index 0000000..80ea431
--- /dev/null
+++ b/freebsd.mak
@@ -0,0 +1,45 @@
+#
+#    Copyright (c) 2013 Nest Labs, Inc.
+#    All rights reserved.
+#
+#    This document is the property of Nest. It is considered
+#    confidential and proprietary information.
+#
+#    This document may not be reproduced or transmitted in any form,
+#    in whole or in part, without the express written permission of
+#    Nest.
+#
+#    Description:
+#      This file builds the FreeBSD sources into a single archive
+#      library and stages the interface headers for it to the results
+#      directory.
+#
+
+include pre.mak
+
+$(call ErrorIfUndefined,PackageSourceDir)
+$(call ErrorIfUndefined,PackageName)
+
+VPATH                   = $(PackageSourceDir)/sys/boot/common
+
+ARCHIVES                = $(PackageName)
+
+$(PackageName)_SOURCES  = crc32.c
+
+$(PackageName)_HEADERS  = sys/boot/common/crc32.h
+
+$(PackageName)_INCLUDES =
+
+$(PackageName)_DEFINES  = 
+
+IncludeDirName          := include/$(PackageName)
+ResultIncDir            := $(call GenerateResultPaths,,$(IncludeDirName))
+ResultIncPaths          := $(call GenerateResultPaths,,$(addprefix $(call Slashify,$(IncludeDirName)),$($(PackageName)_HEADERS)))
+
+CleanPaths              += $(ResultIncPaths)
+TARGETS                 += $(ResultIncPaths)
+
+$(ResultIncPaths): $(ResultIncDir)/%: $(PackageName)/%
+	$(install-result)
+
+include post.mak
diff --git a/freebsd.patches/freebsd-50.description b/freebsd.patches/freebsd-50.description
new file mode 100644
index 0000000..5a43f2b
--- /dev/null
+++ b/freebsd.patches/freebsd-50.description
@@ -0,0 +1 @@
+This patch adds the ability to accumulate a CRC-32 across multiple invocations and adds C++ wrappers to the header.
diff --git a/freebsd.patches/freebsd-50.patch b/freebsd.patches/freebsd-50.patch
new file mode 100644
index 0000000..c774852
--- /dev/null
+++ b/freebsd.patches/freebsd-50.patch
@@ -0,0 +1,59 @@
+diff --git a/sys/boot/common/crc32.c b/sys/boot/common/crc32.c
+index 1a3e3a3..62d9bed 100644
+--- a/sys/boot/common/crc32.c
++++ b/sys/boot/common/crc32.c
+@@ -42,10 +42,8 @@
+  * CRC32 code derived from work by Gary S. Brown.
+  */
+ 
+-#include <sys/cdefs.h>
+-__FBSDID("$FreeBSD$");
+-
+-#include <sys/types.h>
++#include <stddef.h>
++#include <stdint.h>
+ 
+ #include "crc32.h"
+ 
+@@ -96,12 +94,13 @@ static const uint32_t crc32_tab[] = {
+ };
+ 
+ uint32_t
+-crc32(const void *buf, size_t size)
++crc32(uint32_t crc, const void *buf, size_t size)
+ {
+-	const uint8_t *p = buf;
+-	uint32_t crc;
++	const uint8_t *p;
++
++	p = buf;
++	crc = (crc ^ ~0U);
+ 
+-	crc = ~0U;
+ 	while (size--)
+ 		crc = crc32_tab[(crc ^ *p++) & 0xFF] ^ (crc >> 8);
+ 	return (crc ^ ~0U);
+diff --git a/sys/boot/common/crc32.h b/sys/boot/common/crc32.h
+index adfd628..19fdd50 100644
+--- a/sys/boot/common/crc32.h
++++ b/sys/boot/common/crc32.h
+@@ -8,6 +8,18 @@
+ #ifndef _CRC32_H_
+ #define	_CRC32_H_
+ 
+-uint32_t crc32(const void *buf, size_t size);
++
++#include <stddef.h>
++#include <stdint.h>
++
++#ifdef __cplusplus
++extern "C" {
++#endif
++
++uint32_t crc32(uint32_t crc, const void *buf, size_t size);
++
++#ifdef __cplusplus
++}
++#endif
+ 
+ #endif	/* !_CRC32_H_ */
diff --git a/freebsd.urls b/freebsd.urls
new file mode 100644
index 0000000..319c784
--- /dev/null
+++ b/freebsd.urls
@@ -0,0 +1,3 @@
+http://svnweb.freebsd.org/base/head/COPYRIGHT?revision=244900&view=co
+http://svnweb.freebsd.org/base/head/sys/boot/common/crc32.c?revision=233517&view=co
+http://svnweb.freebsd.org/base/head/sys/boot/common/crc32.h?revision=213136&view=co
diff --git a/freebsd/COPYRIGHT b/freebsd/COPYRIGHT
new file mode 100644
index 0000000..13b673a
--- /dev/null
+++ b/freebsd/COPYRIGHT
@@ -0,0 +1,126 @@
+# $FreeBSD$
+#	@(#)COPYRIGHT	8.2 (Berkeley) 3/21/94
+
+The compilation of software known as FreeBSD is distributed under the
+following terms:
+
+Copyright (c) 1992-2013 The FreeBSD Project. All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions
+are met:
+1. Redistributions of source code must retain the above copyright
+   notice, this list of conditions and the following disclaimer.
+2. 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.
+
+THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
+
+The 4.4BSD and 4.4BSD-Lite software is distributed under the following
+terms:
+
+All of the documentation and software included in the 4.4BSD and 4.4BSD-Lite
+Releases is copyrighted by The Regents of the University of California.
+
+Copyright 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994
+	The Regents of the University of California.  All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions
+are met:
+1. Redistributions of source code must retain the above copyright
+   notice, this list of conditions and the following disclaimer.
+2. 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.
+3. All advertising materials mentioning features or use of this software
+   must display the following acknowledgement:
+This product includes software developed by the University of
+California, Berkeley and its contributors.
+4. Neither the name of the University 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 REGENTS 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 REGENTS 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.
+
+The Institute of Electrical and Electronics Engineers and the American
+National Standards Committee X3, on Information Processing Systems have
+given us permission to reprint portions of their documentation.
+
+In the following statement, the phrase ``this text'' refers to portions
+of the system documentation.
+
+Portions of this text are reprinted and reproduced in electronic form in
+the second BSD Networking Software Release, from IEEE Std 1003.1-1988, IEEE
+Standard Portable Operating System Interface for Computer Environments
+(POSIX), copyright C 1988 by the Institute of Electrical and Electronics
+Engineers, Inc.  In the event of any discrepancy between these versions
+and the original IEEE Standard, the original IEEE Standard is the referee
+document.
+
+In the following statement, the phrase ``This material'' refers to portions
+of the system documentation.
+
+This material is reproduced with permission from American National
+Standards Committee X3, on Information Processing Systems.  Computer and
+Business Equipment Manufacturers Association (CBEMA), 311 First St., NW,
+Suite 500, Washington, DC 20001-2178.  The developmental work of
+Programming Language C was completed by the X3J11 Technical Committee.
+
+The views and conclusions contained in the software and documentation are
+those of the authors and should not be interpreted as representing official
+policies, either expressed or implied, of the Regents of the University
+of California.
+
+
+NOTE: The copyright of UC Berkeley's Berkeley Software Distribution ("BSD")
+source has been updated.  The copyright addendum may be found at
+ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change and is
+included below.
+
+July 22, 1999
+
+To All Licensees, Distributors of Any Version of BSD:
+
+As you know, certain of the Berkeley Software Distribution ("BSD") source
+code files require that further distributions of products containing all or
+portions of the software, acknowledge within their advertising materials
+that such products contain software developed by UC Berkeley and its
+contributors.
+
+Specifically, the provision reads:
+
+"     * 3. All advertising materials mentioning features or use of this software
+      *    must display the following acknowledgement:
+      *    This product includes software developed by the University of
+      *    California, Berkeley and its contributors."
+
+Effective immediately, licensees and distributors are no longer required to
+include the acknowledgement within advertising materials.  Accordingly, the
+foregoing paragraph of those BSD Unix files containing it is hereby deleted
+in its entirety.
+
+William Hoskins
+Director, Office of Technology Licensing
+University of California, Berkeley
diff --git a/freebsd/sys/boot/common/crc32.c b/freebsd/sys/boot/common/crc32.c
new file mode 100644
index 0000000..62d9bed
--- /dev/null
+++ b/freebsd/sys/boot/common/crc32.c
@@ -0,0 +1,107 @@
+/*-
+ *  COPYRIGHT (C) 1986 Gary S. Brown.  You may use this program, or
+ *  code or tables extracted from it, as desired without restriction.
+ */
+
+/*
+ *  First, the polynomial itself and its table of feedback terms.  The
+ *  polynomial is
+ *  X^32+X^26+X^23+X^22+X^16+X^12+X^11+X^10+X^8+X^7+X^5+X^4+X^2+X^1+X^0
+ *
+ *  Note that we take it "backwards" and put the highest-order term in
+ *  the lowest-order bit.  The X^32 term is "implied"; the LSB is the
+ *  X^31 term, etc.  The X^0 term (usually shown as "+1") results in
+ *  the MSB being 1
+ *
+ *  Note that the usual hardware shift register implementation, which
+ *  is what we're using (we're merely optimizing it by doing eight-bit
+ *  chunks at a time) shifts bits into the lowest-order term.  In our
+ *  implementation, that means shifting towards the right.  Why do we
+ *  do it this way?  Because the calculated CRC must be transmitted in
+ *  order from highest-order term to lowest-order term.  UARTs transmit
+ *  characters in order from LSB to MSB.  By storing the CRC this way
+ *  we hand it to the UART in the order low-byte to high-byte; the UART
+ *  sends each low-bit to hight-bit; and the result is transmission bit
+ *  by bit from highest- to lowest-order term without requiring any bit
+ *  shuffling on our part.  Reception works similarly
+ *
+ *  The feedback terms table consists of 256, 32-bit entries.  Notes
+ *
+ *      The table can be generated at runtime if desired; code to do so
+ *      is shown later.  It might not be obvious, but the feedback
+ *      terms simply represent the results of eight shift/xor opera
+ *      tions for all combinations of data and CRC register values
+ *
+ *      The values must be right-shifted by eight bits by the "updcrc
+ *      logic; the shift must be unsigned (bring in zeroes).  On some
+ *      hardware you could probably optimize the shift in assembler by
+ *      using byte-swap instructions
+ *      polynomial $edb88320
+ *
+ *
+ * CRC32 code derived from work by Gary S. Brown.
+ */
+
+#include <stddef.h>
+#include <stdint.h>
+
+#include "crc32.h"
+
+static const uint32_t crc32_tab[] = {
+	0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419, 0x706af48f,
+	0xe963a535, 0x9e6495a3,	0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988,
+	0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91, 0x1db71064, 0x6ab020f2,
+	0xf3b97148, 0x84be41de,	0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7,
+	0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec,	0x14015c4f, 0x63066cd9,
+	0xfa0f3d63, 0x8d080df5,	0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172,
+	0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b,	0x35b5a8fa, 0x42b2986c,
+	0xdbbbc9d6, 0xacbcf940,	0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59,
+	0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423,
+	0xcfba9599, 0xb8bda50f, 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924,
+	0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d,	0x76dc4190, 0x01db7106,
+	0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433,
+	0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818, 0x7f6a0dbb, 0x086d3d2d,
+	0x91646c97, 0xe6635c01, 0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e,
+	0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457, 0x65b0d9c6, 0x12b7e950,
+	0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65,
+	0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2, 0x4adfa541, 0x3dd895d7,
+	0xa4d1c46d, 0xd3d6f4fb, 0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0,
+	0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9, 0x5005713c, 0x270241aa,
+	0xbe0b1010, 0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
+	0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17, 0x2eb40d81,
+	0xb7bd5c3b, 0xc0ba6cad, 0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a,
+	0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683, 0xe3630b12, 0x94643b84,
+	0x0d6d6a3e, 0x7a6a5aa8, 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1,
+	0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb,
+	0x196c3671, 0x6e6b06e7, 0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc,
+	0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5, 0xd6d6a3e8, 0xa1d1937e,
+	0x38d8c2c4, 0x4fdff252, 0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b,
+	0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55,
+	0x316e8eef, 0x4669be79, 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236,
+	0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, 0xc5ba3bbe, 0xb2bd0b28,
+	0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d,
+	0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a, 0x9c0906a9, 0xeb0e363f,
+	0x72076785, 0x05005713, 0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38,
+	0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, 0x86d3d2d4, 0xf1d4e242,
+	0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777,
+	0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c, 0x8f659eff, 0xf862ae69,
+	0x616bffd3, 0x166ccf45, 0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2,
+	0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db, 0xaed16a4a, 0xd9d65adc,
+	0x40df0b66, 0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
+	0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605, 0xcdd70693,
+	0x54de5729, 0x23d967bf, 0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94,
+	0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d
+};
+
+uint32_t
+crc32(uint32_t crc, const void *buf, size_t size)
+{
+	const uint8_t *p;
+
+	p = buf;
+	crc = (crc ^ ~0U);
+
+	while (size--)
+		crc = crc32_tab[(crc ^ *p++) & 0xFF] ^ (crc >> 8);
+	return (crc ^ ~0U);
+}
diff --git a/freebsd/sys/boot/common/crc32.h b/freebsd/sys/boot/common/crc32.h
new file mode 100644
index 0000000..5ddf872
--- /dev/null
+++ b/freebsd/sys/boot/common/crc32.h
@@ -0,0 +1,24 @@
+/*-
+ *  COPYRIGHT (C) 1986 Gary S. Brown.  You may use this program, or
+ *  code or tables extracted from it, as desired without restriction.
+ *
+ * $FreeBSD$
+ */
+
+#ifndef _CRC32_H_
+#define	_CRC32_H_
+
+#include <stddef.h>
+#include <stdint.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+uint32_t crc32(uint32_t crc, const void *buf, size_t size);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif	/* !_CRC32_H_ */