diff --git a/Makefile.inc1 b/Makefile.inc1
index 62ed26a2e840..f50b7888d6c1 100644
--- a/Makefile.inc1
+++ b/Makefile.inc1
@@ -1406,7 +1406,8 @@ cross-tools: .MAKE
     usr.bin/xlint/lint1 usr.bin/xlint/lint2 usr.bin/xlint/xlint \
     ${_btxld} \
     ${_crunchide} \
-    ${_kgzip}
+    ${_kgzip} \
+    sys/boot/usb/tools
 	${_+_}@${ECHODIR} "===> ${_tool} (obj,depend,all,install)"; \
 		cd ${.CURDIR}/${_tool} && \
 		${MAKE} DIRPRFX=${_tool}/ obj && \
diff --git a/sys/boot/usb/bsd_busspace.c b/sys/boot/kshim/bsd_busspace.c
similarity index 100%
rename from sys/boot/usb/bsd_busspace.c
rename to sys/boot/kshim/bsd_busspace.c
diff --git a/sys/boot/usb/bsd_global.h b/sys/boot/kshim/bsd_global.h
similarity index 100%
rename from sys/boot/usb/bsd_global.h
rename to sys/boot/kshim/bsd_global.h
diff --git a/sys/boot/usb/bsd_kernel.c b/sys/boot/kshim/bsd_kernel.c
similarity index 100%
rename from sys/boot/usb/bsd_kernel.c
rename to sys/boot/kshim/bsd_kernel.c
diff --git a/sys/boot/usb/bsd_kernel.h b/sys/boot/kshim/bsd_kernel.h
similarity index 100%
rename from sys/boot/usb/bsd_kernel.h
rename to sys/boot/kshim/bsd_kernel.h
diff --git a/sys/boot/kshim/kshim.mk b/sys/boot/kshim/kshim.mk
new file mode 100644
index 000000000000..7e9b00d562d8
--- /dev/null
+++ b/sys/boot/kshim/kshim.mk
@@ -0,0 +1,79 @@
+#
+# $FreeBSD$
+#
+# Copyright (c) 2013 Hans Petter Selasky.
+# Copyright (c) 2014 SRI International
+# All rights reserved.
+#
+# This software was developed by SRI International and the University of
+# Cambridge Computer Laboratory under DARPA/AFRL contract FA8750-10-C-0237
+# ("CTSRD"), as part of the DARPA CRASH research programme.
+#
+# 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.
+#
+
+KSHIM_DIR:=	${.PARSEDIR}
+.PATH:		${KSHIM_DIR}
+
+CFLAGS+=	-I${KSHIM_DIR}
+CFLAGS+=	-I${KSHIM_DIR}/../..
+CFLAGS+=	-DUSB_GLOBAL_INCLUDE_FILE=\"bsd_global.h\"
+CFLAGS+=	-DHAVE_ENDIAN_DEFS
+
+#
+# Single threaded BSD kernel
+#
+KSRCS+=	bsd_kernel.c
+
+#
+# BUSSPACE implementation
+#
+KSRCS+=	bsd_busspace.c
+
+SRCS+=	sysinit_data.c
+SRCS+=	sysuninit_data.c
+
+CLEANFILES+= sysinit.bin
+CLEANFILES+= sysinit_data.c
+CLEANFILES+= sysuninit_data.c
+
+SRCS+=	${KSRCS}
+SYSINIT_OBJS=	${KSRCS:R:C/$/.osys/}
+CLEANFILES+=	${SYSINIT_OBJS}
+
+#
+# SYSINIT() and SYSUNINIT() handling
+#
+
+sysinit_data.c: sysinit.bin
+	sysinit -i sysinit.bin -o ${.TARGET} -k sysinit -s sysinit_data
+
+sysuninit_data.c: sysinit.bin
+	sysinit -i sysinit.bin -o ${.TARGET} -R -k sysuninit -s sysuninit_data
+
+.for KSRC in ${KSRCS:R}
+${KSRC}.osys: ${KSRC}.o
+	${OBJCOPY} -j ".debug.sysinit" -O binary ${KSRC}.o ${KSRC}.osys
+.endfor
+
+sysinit.bin: ${SYSINIT_OBJS}
+	cat ${.ALLSRC} > sysinit.bin
diff --git a/sys/boot/usb/tools/sysinit.h b/sys/boot/kshim/sysinit.h
similarity index 100%
rename from sys/boot/usb/tools/sysinit.h
rename to sys/boot/kshim/sysinit.h
diff --git a/sys/boot/usb/Makefile b/sys/boot/usb/Makefile
index cd4dec000a60..1b94b3db7d82 100644
--- a/sys/boot/usb/Makefile
+++ b/sys/boot/usb/Makefile
@@ -1,7 +1,13 @@
 #
 # $FreeBSD$
 #
-# Copyright (c) 2013 Hans Petter Selasky. All rights reserved.
+# Copyright (c) 2013 Hans Petter Selasky.
+# Copyright (c) 2014 SRI International
+# All rights reserved.
+#
+# This software was developed by SRI International and the University of
+# Cambridge Computer Laboratory under DARPA/AFRL contract FA8750-10-C-0237
+# ("CTSRD"), as part of the DARPA CRASH research programme.
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions
@@ -25,37 +31,15 @@
 # SUCH DAMAGE.
 #
 
-T=${.CURDIR}/tools
-S=${.CURDIR}/../..
-
-.PATH: \
-	${.CURDIR} \
-	${.CURDIR}/storage \
-	${S}/dev/usb \
-	${S}/dev/usb/controller \
-	${S}/dev/usb/serial \
-	${S}/dev/usb/storage \
-	${S}/dev/usb/template
-
 LIB=		usbboot
 INTERNALLIB=
-OBJCOPY?=	objcopy
-SYSCC?=		/usr/bin/cc
 
 CFLAGS+=	-DBOOTPROG=\"usbloader\"
-CFLAGS+=	-DUSB_GLOBAL_INCLUDE_FILE=\"bsd_global.h\"
 CFLAGS+=	-ffunction-sections -fdata-sections
 CFLAGS+=	-ffreestanding
 CFLAGS+=	-Wformat -Wall
-CFLAGS+=	-I${S}
-CFLAGS+=	-I${T}
-CFLAGS+=	-I${.CURDIR}
-CFLAGS+=	-I${.CURDIR}/../common
 CFLAGS+=	-g
-CFLAGS+=	-DUSB_MSCTEST_BULK_SIZE=65536
-CFLAGS+=	-DUSB_POOL_SIZE=131072
 CFLAGS+=	-fno-pic
-CFLAGS+=	-DHAVE_ENDIAN_DEFS
 
 .if ${MACHINE_CPUARCH} == "i386" || ${MACHINE_CPUARCH} == "amd64"
 CFLAGS+=	-march=i386
@@ -68,148 +52,7 @@ CFLAGS+=	-m32
 CFLAGS+=	-mno-abicalls
 .endif
 
-#
-# Single threaded BSD kernel
-#
-SRCS+=	bsd_kernel.c
-
-#
-# BUSSPACE implementation
-#
-SRCS+=	bsd_busspace.c
-
-#
-# BUSDMA implementation
-#
-SRCS+=	usb_busdma_loader.c
-
-#
-# USB controller drivers
-#
-
-SRCS+=	usb_controller.c
-
-.if defined(HAVE_AT91DCI)
-CFLAGS += -DUSB_PCI_PROBE_LIST="\"at91dci\""
-SRCS+=	at91dci.c
-.endif
-
-.if defined(HAVE_ATMEGADCI)
-CFLAGS += -DUSB_PCI_PROBE_LIST="\"atmegadci\""
-SRCS+=	atmegadci.c
-.endif
-
-.if defined(HAVE_AVR32DCI)
-CFLAGS += -DUSB_PCI_PROBE_LIST="\"avr32dci\""
-SRCS+=	avr32dci.c
-.endif
-
-.if defined(HAVE_DWCOTG)
-CFLAGS += -DUSB_PCI_PROBE_LIST="\"dwcotg\""
-SRCS+=	dwcotg.c
-.endif
-
-.if defined(HAVE_MUSBOTG)
-CFLAGS += -DUSB_PCI_PROBE_LIST="\"musbotg\""
-SRCS+=	musbotg.c
-.endif
-
-.if defined(HAVE_EHCI)
-CFLAGS += -DUSB_PCI_PROBE_LIST="\"ehci\""
-SRCS+=	ehci.c
-.endif
-
-.if defined(HAVE_OHCI)
-CFLAGS += -DUSB_PCI_PROBE_LIST="\"ohci\""
-SRCS+=	ohci.c
-.endif
-
-.if defined(HAVE_UHCI)
-CFLAGS += -DUSB_PCI_PROBE_LIST="\"uhci\""
-SRCS+=	uhci.c
-.endif
-
-.if defined(HAVE_XHCI)
-CFLAGS += -DUSB_PCI_PROBE_LIST="\"xhci\""
-SRCS+=	xhci.c
-.endif
-
-.if defined(HAVE_USS820DCI)
-CFLAGS += -DUSB_PCI_PROBE_LIST="\"uss820dci\""
-SRCS+=	uss820dci.c
-.endif
-
-.if defined(HAVE_SAF1761OTG)
-CFLAGS += -DUSB_PCI_PROBE_LIST="\"saf1761otg\""
-CFLAGS += -DUSB_PCI_MEMORY_ADDRESS=0x900000007f100000ULL
-CFLAGS += -DUSB_PCI_MEMORY_SIZE=0x40000U
-SRCS+=	saf1761_otg.c
-SRCS+=	saf1761_otg_boot.c
-.endif
-
-#
-# USB core and templates
-#
-SRCS+=	usb_core.c
-SRCS+=	usb_debug.c
-SRCS+=	usb_device.c
-SRCS+=	usb_dynamic.c
-SRCS+=	usb_error.c
-SRCS+=	usb_handle_request.c
-SRCS+=	usb_hid.c
-SRCS+=	usb_hub.c
-SRCS+=	usb_lookup.c
-SRCS+=	usb_msctest.c
-SRCS+=	usb_parse.c
-SRCS+=	usb_request.c
-SRCS+=	usb_transfer.c
-SRCS+=	usb_util.c
-SRCS+=	usb_template.c
-SRCS+=	usb_template_cdce.c
-SRCS+=	usb_template_msc.c
-SRCS+=	usb_template_mtp.c
-SRCS+=	usb_template_modem.c
-SRCS+=	usb_template_mouse.c
-SRCS+=	usb_template_kbd.c
-SRCS+=	usb_template_audio.c
-SRCS+=	sysinit_data.c
-SRCS+=	sysuninit_data.c
-
-#
-# USB mass storage support
-#
-SRCS+=	umass_common.c
-
-.if defined(HAVE_UMASS_LOADER)
-SRCS+=	umass_loader.c
-.endif
-
-CLEANFILES+= sysinit
-CLEANFILES+= sysinit.bin
-CLEANFILES+= sysinit_data.c
-CLEANFILES+= sysuninit_data.c
-
-CLEANFILES+= ${SRCS:C/\.c/.osys/g}
 
+.include "usbcore.mk"
+.include "../kshim/kshim.mk"
 .include <bsd.lib.mk>
-
-#
-# SYSINIT() and SYSUNINIT() handling
-#
-sysinit: ${T}/sysinit.c
-	${SYSCC} -Wall -o ${.TARGET} ${.ALLSRC}
-
-sysinit_data.c: sysinit.bin sysinit
-	${.OBJDIR}/sysinit -i sysinit.bin -o ${.TARGET} -k sysinit -s sysinit_data
-
-sysuninit_data.c: sysinit.bin sysinit
-	${.OBJDIR}/sysinit -i sysinit.bin -o ${.TARGET} -R -k sysuninit -s sysuninit_data
-
-.for F in ${OBJS}
-${F}sys: ${F}
-	${OBJCOPY} -j ".debug.sysinit" -O binary ${F} ${.TARGET}
-	[ -f ${.TARGET} ] || touch ${.TARGET}
-.endfor
-
-sysinit.bin: ${OBJS:C/\.o/.osys/g:C/sysinit_data.osys//g:C/sysuninit_data.osys//g}
-	cat ${.ALLSRC} > sysinit.bin
diff --git a/sys/boot/usb/tools/Makefile b/sys/boot/usb/tools/Makefile
new file mode 100644
index 000000000000..ae3259f98c32
--- /dev/null
+++ b/sys/boot/usb/tools/Makefile
@@ -0,0 +1,10 @@
+# $FreeBSD$
+
+PROG=	sysinit
+NO_MAN=
+
+CFLAGS+=	-I${.CURDIR}/../../kshim
+
+BINDIR?=	/usr/bin
+
+.include <bsd.prog.mk>
diff --git a/sys/boot/usb/usbcore.mk b/sys/boot/usb/usbcore.mk
new file mode 100644
index 000000000000..8b6c59af796a
--- /dev/null
+++ b/sys/boot/usb/usbcore.mk
@@ -0,0 +1,154 @@
+#
+# $FreeBSD$
+#
+# Copyright (c) 2013 Hans Petter Selasky.
+# Copyright (c) 2014 SRI International
+# All rights reserved.
+#
+# This software was developed by SRI International and the University of
+# Cambridge Computer Laboratory under DARPA/AFRL contract FA8750-10-C-0237
+# ("CTSRD"), as part of the DARPA CRASH research programme.
+#
+# 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.
+#
+
+USBCOREDIR:=	${.PARSEDIR}
+S=${USBCOREDIR}/../..
+
+.PATH: \
+	${USBCOREDIR} \
+	${USBCOREDIR}/storage \
+	${S}/dev/usb \
+	${S}/dev/usb/controller \
+	${S}/dev/usb/serial \
+	${S}/dev/usb/storage \
+	${S}/dev/usb/template
+.undef S
+
+CFLAGS+=	-DUSB_MSCTEST_BULK_SIZE=65536
+CFLAGS+=	-DUSB_POOL_SIZE=131072
+
+#
+# BUSDMA implementation
+#
+SRCS+=	usb_busdma_loader.c
+
+#
+# USB controller drivers
+#
+
+KSRCS+=	usb_controller.c
+
+.if defined(HAVE_AT91DCI)
+CFLAGS += -DUSB_PCI_PROBE_LIST="\"at91dci\""
+KSRCS+=	at91dci.c
+.endif
+
+.if defined(HAVE_ATMEGADCI)
+CFLAGS += -DUSB_PCI_PROBE_LIST="\"atmegadci\""
+KSRCS+=	atmegadci.c
+.endif
+
+.if defined(HAVE_AVR32DCI)
+CFLAGS += -DUSB_PCI_PROBE_LIST="\"avr32dci\""
+KSRCS+=	avr32dci.c
+.endif
+
+.if defined(HAVE_DWCOTG)
+CFLAGS += -DUSB_PCI_PROBE_LIST="\"dwcotg\""
+KSRCS+=	dwcotg.c
+.endif
+
+.if defined(HAVE_MUSBOTG)
+CFLAGS += -DUSB_PCI_PROBE_LIST="\"musbotg\""
+KSRCS+=	musbotg.c
+.endif
+
+.if defined(HAVE_EHCI)
+CFLAGS += -DUSB_PCI_PROBE_LIST="\"ehci\""
+KSRCS+=	ehci.c
+.endif
+
+.if defined(HAVE_OHCI)
+CFLAGS += -DUSB_PCI_PROBE_LIST="\"ohci\""
+KSRCS+=	ohci.c
+.endif
+
+.if defined(HAVE_UHCI)
+CFLAGS += -DUSB_PCI_PROBE_LIST="\"uhci\""
+KSRCS+=	uhci.c
+.endif
+
+.if defined(HAVE_XHCI)
+CFLAGS += -DUSB_PCI_PROBE_LIST="\"xhci\""
+KSRCS+=	xhci.c
+.endif
+
+.if defined(HAVE_USS820DCI)
+CFLAGS += -DUSB_PCI_PROBE_LIST="\"uss820dci\""
+KSRCS+=	uss820dci.c
+.endif
+
+.if defined(HAVE_SAF1761OTG)
+CFLAGS += -DUSB_PCI_PROBE_LIST="\"saf1761otg\""
+CFLAGS += -DUSB_PCI_MEMORY_ADDRESS=0x900000007f100000ULL
+CFLAGS += -DUSB_PCI_MEMORY_SIZE=0x40000U
+KSRCS+=	saf1761_otg.c
+KSRCS+=	saf1761_otg_boot.c
+.endif
+
+#
+# USB core and templates
+#
+KSRCS+=	usb_core.c
+KSRCS+=	usb_debug.c
+KSRCS+=	usb_device.c
+KSRCS+=	usb_dynamic.c
+KSRCS+=	usb_error.c
+KSRCS+=	usb_handle_request.c
+KSRCS+=	usb_hid.c
+KSRCS+=	usb_hub.c
+KSRCS+=	usb_lookup.c
+KSRCS+=	usb_msctest.c
+KSRCS+=	usb_parse.c
+KSRCS+=	usb_request.c
+KSRCS+=	usb_transfer.c
+KSRCS+=	usb_util.c
+KSRCS+=	usb_template.c
+KSRCS+=	usb_template_cdce.c
+KSRCS+=	usb_template_msc.c
+KSRCS+=	usb_template_mtp.c
+KSRCS+=	usb_template_modem.c
+KSRCS+=	usb_template_mouse.c
+KSRCS+=	usb_template_kbd.c
+KSRCS+=	usb_template_audio.c
+
+#
+# USB mass storage support
+#
+SRCS+=	umass_common.c
+
+.if defined(HAVE_UMASS_LOADER)
+CFLAGS+=        -I${.CURDIR}/../common
+SRCS+=  umass_loader.c
+.endif
+