This is the kernel subsystem API documentation generation framework.

It uses doxygen to generate the API documentation. For each subsystem
a very small (about 20 lines with comments) subsystem specific Doxyfile
has to be written (have a look at the README for more). All common doxygen
options are specified in a separate file.

The framework is configured to not only generate the HTML version, but also
a PDF version (the paper size is hardcoded to DIN A4 currently and depending
on the subsystem you have to increase some limits in the latex configuration
of your system, the README tells more about this).

It also allows cross-references between the subsystems (it generates doxygen
tag files).

Currently the docs are generated in OBJDIR, but this may change after
coordination with doc@. The makefile is prepared to generate/move various
parts of the generated docs to different destinations.

TARGET_ARCH is respected and some env-vars are set for architecture specific
handling of the source (the README tells more).

Subsystems for which docs are generated:
 - cam                  - crypto                - dev_pci
 - dev_sound            - dev_usb               - geom
 - i4b                  - kern                  - libkern
 - linux                - net80211              - netgraph
 - netinet              - netinet6              - netipsec
 - opencrypto           - vm

Requested by:	gnn

21 files changed, 789 insertions, 0 deletions

diff --git a/tools/kerneldoc/subsys/Dependencies b/tools/kerneldoc/subsys/Dependencies
new file mode 100644
index 0000000..2eda312
--- /dev/null
+++ b/tools/kerneldoc/subsys/Dependencies
@@ -0,0 +1,22 @@
+#
+# $FreeBSD$
+#
+# makefile dependencies for doxygen tag files
+#
+
+$(.OBJDIR)/dev_sound/dev_sound.tag:	$(.OBJDIR)/dev_pci/dev_pci.tag \
+					$(.OBJDIR)/dev_usb/dev_usb.tag \
+					$(.OBJDIR)/ac97_if.h \
+					$(.OBJDIR)/channel_if.h \
+					$(.OBJDIR)/feeder_if.h \
+					$(.OBJDIR)/mixer_if.h
+
+$(.OBJDIR)/dev_usb/dev_usb.tag:	$(.OBJDIR)/dev_pci/dev_pci.tag \
+				$(.OBJDIR)/usb_if.h
+
+$(.OBJDIR)/dev_pci/dev_pci.tag:	$(.OBJDIR)/pci_if.h \
+				$(.OBJDIR)/pcib_if.h \
+				$(.OBJDIR)/bus_if.h
+
+$(.OBJDIR)/i4b/i4b.tag: $(.OBJDIR)/dev_pci/dev_pci.tag
+
diff --git a/tools/kerneldoc/subsys/Doxyfile-cam b/tools/kerneldoc/subsys/Doxyfile-cam
new file mode 100644
index 0000000..55e7771
--- /dev/null
+++ b/tools/kerneldoc/subsys/Doxyfile-cam
@@ -0,0 +1,20 @@
+# Doxyfile 1.4.1
+
+# $FreeBSD$
+
+#---------------------------------------------------------------------------
+# Project related configuration options
+#---------------------------------------------------------------------------
+PROJECT_NAME           = "FreeBSD kernel CAM code"
+OUTPUT_DIRECTORY       = $(DOXYGEN_DEST_PATH)/cam/
+EXTRACT_ALL            = YES    # for undocumented src, no warnings enabled
+#--------------------------------------------------------------------------
+# configuration options related to the input files
+#---------------------------------------------------------------------------
+INPUT                  = $(DOXYGEN_SRC_PATH)/cam/
+
+GENERATE_TAGFILE       = cam/cam.tag
+
+@INCLUDE_PATH          = $(DOXYGEN_INCLUDE_PATH)
+@INCLUDE               = common-Doxyfile
+
diff --git a/tools/kerneldoc/subsys/Doxyfile-crypto b/tools/kerneldoc/subsys/Doxyfile-crypto
new file mode 100644
index 0000000..4eadf59
--- /dev/null
+++ b/tools/kerneldoc/subsys/Doxyfile-crypto
@@ -0,0 +1,20 @@
+# Doxyfile 1.4.1
+
+# $FreeBSD$
+
+#---------------------------------------------------------------------------
+# Project related configuration options
+#---------------------------------------------------------------------------
+PROJECT_NAME           = "FreeBSD kernel crypto code"
+OUTPUT_DIRECTORY       = $(DOXYGEN_DEST_PATH)/crypto/
+EXTRACT_ALL            = YES    # for undocumented src, no warnings enabled
+#--------------------------------------------------------------------------
+# configuration options related to the input files
+#---------------------------------------------------------------------------
+INPUT                  = $(DOXYGEN_SRC_PATH)/crypto/
+
+GENERATE_TAGFILE       = crypto/crypto.tag
+
+@INCLUDE_PATH          = $(DOXYGEN_INCLUDE_PATH)
+@INCLUDE               = common-Doxyfile
+
diff --git a/tools/kerneldoc/subsys/Doxyfile-dev_pci b/tools/kerneldoc/subsys/Doxyfile-dev_pci
new file mode 100644
index 0000000..9690796
--- /dev/null
+++ b/tools/kerneldoc/subsys/Doxyfile-dev_pci
@@ -0,0 +1,21 @@
+# Doxyfile 1.4.1
+
+# $FreeBSD$
+
+#---------------------------------------------------------------------------
+# Project related configuration options
+#---------------------------------------------------------------------------
+PROJECT_NAME           = "FreeBSD kernel $(DOXYGEN_TARGET_ARCH) PCI device code"
+OUTPUT_DIRECTORY       = $(DOXYGEN_DEST_PATH)/dev_pci/
+EXTRACT_ALL            = YES    # for undocumented src, no warnings enabled
+#---------------------------------------------------------------------------
+# configuration options related to the input files
+#---------------------------------------------------------------------------
+INPUT                  = $(DOXYGEN_SRC_PATH)/dev/pci/ \
+                         $(DOXYGEN_SRC_PATH)/$(DOXYGEN_TARGET_ARCH)/pci/
+
+GENERATE_TAGFILE       = dev_pci/dev_pci.tag
+
+@INCLUDE_PATH          = $(DOXYGEN_INCLUDE_PATH)
+@INCLUDE               = common-Doxyfile
+
diff --git a/tools/kerneldoc/subsys/Doxyfile-dev_sound b/tools/kerneldoc/subsys/Doxyfile-dev_sound
new file mode 100644
index 0000000..430960e
--- /dev/null
+++ b/tools/kerneldoc/subsys/Doxyfile-dev_sound
@@ -0,0 +1,22 @@
+# Doxyfile 1.4.1
+
+# $FreeBSD$
+
+#---------------------------------------------------------------------------
+# Project related configuration options
+#---------------------------------------------------------------------------
+PROJECT_NAME           = "FreeBSD kernel sound device code"
+OUTPUT_DIRECTORY       = $(DOXYGEN_DEST_PATH)/dev_sound/
+EXTRACT_ALL            = YES    # for undocumented src, no warnings enabled
+#---------------------------------------------------------------------------
+# configuration options related to the input files
+#---------------------------------------------------------------------------
+INPUT                  = $(DOXYGEN_SRC_PATH)/dev/sound/
+
+GENERATE_TAGFILE       = dev_sound/dev_sound.tag
+TAGFILES               = dev_pci/dev_pci.tag=../../dev_pci/html \
+			 dev_usb/dev_usb.tag=../../dev_usb/html
+
+@INCLUDE_PATH          = $(DOXYGEN_INCLUDE_PATH)
+@INCLUDE               = common-Doxyfile
+
diff --git a/tools/kerneldoc/subsys/Doxyfile-dev_usb b/tools/kerneldoc/subsys/Doxyfile-dev_usb
new file mode 100644
index 0000000..7a05dfa
--- /dev/null
+++ b/tools/kerneldoc/subsys/Doxyfile-dev_usb
@@ -0,0 +1,21 @@
+# Doxyfile 1.4.1
+
+# $FreeBSD$
+
+#---------------------------------------------------------------------------
+# Project related configuration options
+#---------------------------------------------------------------------------
+PROJECT_NAME           = "FreeBSD kernel usb device Code"
+OUTPUT_DIRECTORY       = $(DOXYGEN_DEST_PATH)/dev_usb/
+EXTRACT_ALL            = YES    # for undocumented src, no warnings enabled
+#---------------------------------------------------------------------------
+# configuration options related to the input files
+#---------------------------------------------------------------------------
+INPUT                  = $(DOXYGEN_SRC_PATH)/dev/usb/
+
+GENERATE_TAGFILE       = dev_usb/dev_usb.tag
+TAGFILES               = dev_pci/dev_pci.tag=../../dev_pci/html
+
+@INCLUDE_PATH          = $(DOXYGEN_INCLUDE_PATH)
+@INCLUDE               = common-Doxyfile
+
diff --git a/tools/kerneldoc/subsys/Doxyfile-geom b/tools/kerneldoc/subsys/Doxyfile-geom
new file mode 100644
index 0000000..30c9c0c
--- /dev/null
+++ b/tools/kerneldoc/subsys/Doxyfile-geom
@@ -0,0 +1,20 @@
+# Doxyfile 1.4.1
+
+# $FreeBSD$
+
+#---------------------------------------------------------------------------
+# Project related configuration options
+#---------------------------------------------------------------------------
+PROJECT_NAME           = "FreeBSD kernel GEOM code"
+OUTPUT_DIRECTORY       = $(DOXYGEN_DEST_PATH)/geom/
+EXTRACT_ALL            = YES    # for undocumented src, no warnings enabled
+#--------------------------------------------------------------------------
+# configuration options related to the input files
+#---------------------------------------------------------------------------
+INPUT                  = $(DOXYGEN_SRC_PATH)/geom/
+
+GENERATE_TAGFILE       = geom/geom.tag
+
+@INCLUDE_PATH          = $(DOXYGEN_INCLUDE_PATH)
+@INCLUDE               = common-Doxyfile
+
diff --git a/tools/kerneldoc/subsys/Doxyfile-i4b b/tools/kerneldoc/subsys/Doxyfile-i4b
new file mode 100644
index 0000000..0a3251e
--- /dev/null
+++ b/tools/kerneldoc/subsys/Doxyfile-i4b
@@ -0,0 +1,21 @@
+# Doxyfile 1.4.1
+
+# $FreeBSD$
+
+#---------------------------------------------------------------------------
+# Project related configuration options
+#---------------------------------------------------------------------------
+PROJECT_NAME           = "FreeBSD kernel ISDN code"
+OUTPUT_DIRECTORY       = $(DOXYGEN_DEST_PATH)/i4b/
+EXTRACT_ALL            = YES    # for undocumented src, no warnings enabled
+#--------------------------------------------------------------------------
+# configuration options related to the input files
+#---------------------------------------------------------------------------
+INPUT                  = $(DOXYGEN_SRC_PATH)/i4b/
+
+GENERATE_TAGFILE       = i4b/i4b.tag
+TAGFILES               = dev_pci/dev_pci.tag=../../dev_pci/html
+
+@INCLUDE_PATH          = $(DOXYGEN_INCLUDE_PATH)
+@INCLUDE               = common-Doxyfile
+
diff --git a/tools/kerneldoc/subsys/Doxyfile-kern b/tools/kerneldoc/subsys/Doxyfile-kern
new file mode 100644
index 0000000..b2ba51f
--- /dev/null
+++ b/tools/kerneldoc/subsys/Doxyfile-kern
@@ -0,0 +1,20 @@
+# Doxyfile 1.4.1
+
+# $FreeBSD$
+
+#---------------------------------------------------------------------------
+# Project related configuration options
+#---------------------------------------------------------------------------
+PROJECT_NAME           = "FreeBSD kernel kern code"
+OUTPUT_DIRECTORY       = $(DOXYGEN_DEST_PATH)/kern/
+EXTRACT_ALL            = YES    # for undocumented src, no warnings enabled
+#--------------------------------------------------------------------------
+# configuration options related to the input files
+#---------------------------------------------------------------------------
+INPUT                  = $(DOXYGEN_SRC_PATH)/kern/
+
+GENERATE_TAGFILE       = kern/kern.tag
+
+@INCLUDE_PATH          = $(DOXYGEN_INCLUDE_PATH)
+@INCLUDE               = common-Doxyfile
+
diff --git a/tools/kerneldoc/subsys/Doxyfile-libkern b/tools/kerneldoc/subsys/Doxyfile-libkern
new file mode 100644
index 0000000..5191c9e
--- /dev/null
+++ b/tools/kerneldoc/subsys/Doxyfile-libkern
@@ -0,0 +1,20 @@
+# Doxyfile 1.4.1
+
+# $FreeBSD$
+
+#---------------------------------------------------------------------------
+# Project related configuration options
+#---------------------------------------------------------------------------
+PROJECT_NAME           = "FreeBSD kernel libkern code"
+OUTPUT_DIRECTORY       = $(DOXYGEN_DEST_PATH)/libkern/
+EXTRACT_ALL            = YES    # for undocumented src, no warnings enabled
+#--------------------------------------------------------------------------
+# configuration options related to the input files
+#---------------------------------------------------------------------------
+INPUT                  = $(DOXYGEN_SRC_PATH)/libkern/
+
+GENERATE_TAGFILE       = libkern/libkern.tag
+
+@INCLUDE_PATH          = $(DOXYGEN_INCLUDE_PATH)
+@INCLUDE               = common-Doxyfile
+
diff --git a/tools/kerneldoc/subsys/Doxyfile-linux b/tools/kerneldoc/subsys/Doxyfile-linux
new file mode 100644
index 0000000..8de57f3
--- /dev/null
+++ b/tools/kerneldoc/subsys/Doxyfile-linux
@@ -0,0 +1,20 @@
+# Doxyfile 1.4.1
+
+# $FreeBSD$
+
+#---------------------------------------------------------------------------
+# Project related configuration options
+#---------------------------------------------------------------------------
+PROJECT_NAME           = "FreeBSD kernel $(DOXYGEN_TARGET_ARCH) linuxolator code"
+OUTPUT_DIRECTORY       = $(DOXYGEN_DEST_PATH)/linux/
+EXTRACT_ALL            = YES    # for undocumented src, no warnings enabled
+#--------------------------------------------------------------------------
+# configuration options related to the input files
+#---------------------------------------------------------------------------
+INPUT                  = $(DOXYGEN_SRC_PATH)/compat/linux $(DOXYGEN_LINUX_PATH)
+
+GENERATE_TAGFILE       = linux/linux.tag
+
+@INCLUDE_PATH          = $(DOXYGEN_INCLUDE_PATH)
+@INCLUDE               = common-Doxyfile
+
diff --git a/tools/kerneldoc/subsys/Doxyfile-net80211 b/tools/kerneldoc/subsys/Doxyfile-net80211
new file mode 100644
index 0000000..75ada25
--- /dev/null
+++ b/tools/kerneldoc/subsys/Doxyfile-net80211
@@ -0,0 +1,20 @@
+# Doxyfile 1.4.1
+
+# $FreeBSD$
+
+#---------------------------------------------------------------------------
+# Project related configuration options
+#---------------------------------------------------------------------------
+PROJECT_NAME           = "FreeBSD kernel WLAN code"
+OUTPUT_DIRECTORY       = $(DOXYGEN_DEST_PATH)/net80211/
+EXTRACT_ALL            = YES    # for undocumented src, no warnings enabled
+#--------------------------------------------------------------------------
+# configuration options related to the input files
+#---------------------------------------------------------------------------
+INPUT                  = $(DOXYGEN_SRC_PATH)/net80211/
+
+GENERATE_TAGFILE       = net80211/net80211.tag
+
+@INCLUDE_PATH          = $(DOXYGEN_INCLUDE_PATH)
+@INCLUDE               = common-Doxyfile
+
diff --git a/tools/kerneldoc/subsys/Doxyfile-netgraph b/tools/kerneldoc/subsys/Doxyfile-netgraph
new file mode 100644
index 0000000..b203e68
--- /dev/null
+++ b/tools/kerneldoc/subsys/Doxyfile-netgraph
@@ -0,0 +1,20 @@
+# Doxyfile 1.4.1
+
+# $FreeBSD$
+
+#---------------------------------------------------------------------------
+# Project related configuration options
+#---------------------------------------------------------------------------
+PROJECT_NAME           = "FreeBSD kernel netgraph code"
+OUTPUT_DIRECTORY       = $(DOXYGEN_DEST_PATH)/netgraph/
+EXTRACT_ALL            = YES    # for undocumented src, no warnings enabled
+#--------------------------------------------------------------------------
+# configuration options related to the input files
+#---------------------------------------------------------------------------
+INPUT                  = $(DOXYGEN_SRC_PATH)/netgraph/
+
+GENERATE_TAGFILE       = netgraph/netgraph.tag
+
+@INCLUDE_PATH          = $(DOXYGEN_INCLUDE_PATH)
+@INCLUDE               = common-Doxyfile
+
diff --git a/tools/kerneldoc/subsys/Doxyfile-netinet b/tools/kerneldoc/subsys/Doxyfile-netinet
new file mode 100644
index 0000000..c5c91dc
--- /dev/null
+++ b/tools/kerneldoc/subsys/Doxyfile-netinet
@@ -0,0 +1,20 @@
+# Doxyfile 1.4.1
+
+# $FreeBSD$
+
+#---------------------------------------------------------------------------
+# Project related configuration options
+#---------------------------------------------------------------------------
+PROJECT_NAME           = "FreeBSD kernel IPv4 code"
+OUTPUT_DIRECTORY       = $(DOXYGEN_DEST_PATH)/netinet/
+EXTRACT_ALL            = YES    # for undocumented src, no warnings enabled
+#--------------------------------------------------------------------------
+# configuration options related to the input files
+#---------------------------------------------------------------------------
+INPUT                  = $(DOXYGEN_SRC_PATH)/netinet/
+
+GENERATE_TAGFILE       = netinet/netinet.tag
+
+@INCLUDE_PATH          = $(DOXYGEN_INCLUDE_PATH)
+@INCLUDE               = common-Doxyfile
+
diff --git a/tools/kerneldoc/subsys/Doxyfile-netinet6 b/tools/kerneldoc/subsys/Doxyfile-netinet6
new file mode 100644
index 0000000..57c0f8c
--- /dev/null
+++ b/tools/kerneldoc/subsys/Doxyfile-netinet6
@@ -0,0 +1,20 @@
+# Doxyfile 1.4.1
+
+# $FreeBSD$
+
+#---------------------------------------------------------------------------
+# Project related configuration options
+#---------------------------------------------------------------------------
+PROJECT_NAME           = "FreeBSD kernel IPv6 code"
+OUTPUT_DIRECTORY       = $(DOXYGEN_DEST_PATH)/netinet6/
+EXTRACT_ALL            = YES    # for undocumented src, no warnings enabled
+#--------------------------------------------------------------------------
+# configuration options related to the input files
+#---------------------------------------------------------------------------
+INPUT                  = $(DOXYGEN_SRC_PATH)/netinet6/
+
+GENERATE_TAGFILE       = netinet6/netinet6.tag
+
+@INCLUDE_PATH          = $(DOXYGEN_INCLUDE_PATH)
+@INCLUDE               = common-Doxyfile
+
diff --git a/tools/kerneldoc/subsys/Doxyfile-netipsec b/tools/kerneldoc/subsys/Doxyfile-netipsec
new file mode 100644
index 0000000..b962e2c
--- /dev/null
+++ b/tools/kerneldoc/subsys/Doxyfile-netipsec
@@ -0,0 +1,20 @@
+# Doxyfile 1.4.1
+
+# $FreeBSD$
+
+#---------------------------------------------------------------------------
+# Project related configuration options
+#---------------------------------------------------------------------------
+PROJECT_NAME           = "FreeBSD kernel IPsec code"
+OUTPUT_DIRECTORY       = $(DOXYGEN_DEST_PATH)/netipsec/
+EXTRACT_ALL            = YES    # for undocumented src, no warnings enabled
+#--------------------------------------------------------------------------
+# configuration options related to the input files
+#---------------------------------------------------------------------------
+INPUT                  = $(DOXYGEN_SRC_PATH)/netipsec/
+
+GENERATE_TAGFILE       = netipsec/netipsec.tag
+
+@INCLUDE_PATH          = $(DOXYGEN_INCLUDE_PATH)
+@INCLUDE               = common-Doxyfile
+
diff --git a/tools/kerneldoc/subsys/Doxyfile-opencrypto b/tools/kerneldoc/subsys/Doxyfile-opencrypto
new file mode 100644
index 0000000..c14a59f
--- /dev/null
+++ b/tools/kerneldoc/subsys/Doxyfile-opencrypto
@@ -0,0 +1,20 @@
+# Doxyfile 1.4.1
+
+# $FreeBSD$
+
+#---------------------------------------------------------------------------
+# Project related configuration options
+#---------------------------------------------------------------------------
+PROJECT_NAME           = "FreeBSD kernel opencrypto code"
+OUTPUT_DIRECTORY       = $(DOXYGEN_DEST_PATH)/opencrypto/
+EXTRACT_ALL            = YES    # for undocumented src, no warnings enabled
+#--------------------------------------------------------------------------
+# configuration options related to the input files
+#---------------------------------------------------------------------------
+INPUT                  = $(DOXYGEN_SRC_PATH)/opencrypto/
+
+GENERATE_TAGFILE       = opencrypto/opencrypto.tag
+
+@INCLUDE_PATH          = $(DOXYGEN_INCLUDE_PATH)
+@INCLUDE               = common-Doxyfile
+
diff --git a/tools/kerneldoc/subsys/Doxyfile-vm b/tools/kerneldoc/subsys/Doxyfile-vm
new file mode 100644
index 0000000..c232997
--- /dev/null
+++ b/tools/kerneldoc/subsys/Doxyfile-vm
@@ -0,0 +1,20 @@
+# Doxyfile 1.4.1
+
+# $FreeBSD$
+
+#---------------------------------------------------------------------------
+# Project related configuration options
+#---------------------------------------------------------------------------
+PROJECT_NAME           = "FreeBSD virtual memory subsystem code"
+OUTPUT_DIRECTORY       = $(DOXYGEN_DEST_PATH)/vm/
+EXTRACT_ALL            = YES    # for undocumented src, no warnings enabled
+#---------------------------------------------------------------------------
+# configuration options related to the input files
+#---------------------------------------------------------------------------
+INPUT                  = $(DOXYGEN_SRC_PATH)/vm/
+
+GENERATE_TAGFILE       = vm/vm.tag
+
+@INCLUDE_PATH          = $(DOXYGEN_INCLUDE_PATH)
+@INCLUDE               = common-Doxyfile
+
diff --git a/tools/kerneldoc/subsys/Makefile b/tools/kerneldoc/subsys/Makefile
new file mode 100644
index 0000000..35aed6c
--- /dev/null
+++ b/tools/kerneldoc/subsys/Makefile
@@ -0,0 +1,124 @@
+#
+# $FreeBSD$
+#
+
+_ALL!=	cd ${.CURDIR} && ls Doxyfile-*
+ALL=	${_ALL:C/Doxyfile-//g}
+PDF_ALL=${_ALL:C/Doxyfile/pdf/g}
+
+TARGET_ARCH?=	${MACHINE_ARCH}
+S?=/usr/src/sys
+
+MFILES+=contrib/dev/ath/freebsd/ah_if.m
+MFILES+=dev/acpica/acpi_if.m
+MFILES+=dev/eisa/eisa_if.m
+MFILES+=dev/iicbus/iicbb_if.m
+MFILES+=dev/iicbus/iicbus_if.m
+MFILES+=dev/mii/miibus_if.m
+MFILES+=dev/ofw/ofw_bus_if.m
+MFILES+=dev/pccard/card_if.m
+MFILES+=dev/pccard/power_if.m
+MFILES+=dev/pci/pci_if.m
+MFILES+=dev/pci/pcib_if.m
+MFILES+=dev/ppbus/ppbus_if.m
+MFILES+=dev/smbus/smbus_if.m
+MFILES+=dev/sound/pcm/ac97_if.m
+MFILES+=dev/sound/pcm/channel_if.m
+MFILES+=dev/sound/pcm/feeder_if.m
+MFILES+=dev/sound/pcm/mixer_if.m
+MFILES+=dev/uart/uart_if.m
+MFILES+=dev/usb/usb_if.m
+MFILES+=isa/isa_if.m
+MFILES+=kern/bus_if.m
+MFILES+=kern/clock_if.m
+MFILES+=kern/cpufreq_if.m
+MFILES+=kern/device_if.m
+MFILES+=kern/linker_if.m
+MFILES+=libkern/iconv_converter_if.m
+MFILES+=opencrypto/crypto_if.m
+MFILES+=pc98/pc98/canbus_if.m
+MFILES+=pci/agp_if.m
+MFILES+=powerpc/powerpc/pic_if.m
+MFILES+=sparc64/pci/ofw_pci_if.m
+
+.if exists{${S}/${TARGET_ARCH}/${TARGET_ARCH}/clock_if.m}
+MFILES+=${TARGET_ARCH}/${TARGET_ARCH}/clock_if.m
+.endif
+
+HFILES=	${MFILES:T:S/.m$/.h/}
+AWK?=	awk
+
+.MAIN:	usage
+
+usage:
+	@echo "Possible targets are:"
+.for entry in ${ALL}
+	@echo "	${entry}"
+	@echo "	pdf-${entry}"
+	@echo "	clean-${entry}"
+.endfor
+	@echo
+	@echo "	all"
+	@echo "	pdf-all"
+	@echo "	clean"
+
+all:	${ALL}
+pdf-all:${PDF_ALL}
+
+mfiles: ${HFILES:S/^/${.OBJDIR}\//}
+
+DOXYGEN_DEST_PATH=	${.OBJDIR}
+DOXYGEN_LATEX_DEST_PATH=${.OBJDIR}
+DOXYGEN_PDF_DEST_PATH=	${.OBJDIR}
+
+.if exists{${S}/${TARGET_ARCH}/linux}
+DOXYGEN_LINUX_PATH=	${S}/${TARGET_ARCH}/linux
+.endif
+.if exists{${S}/${TARGET_ARCH}/linux32}
+DOXYGEN_LINUX_PATH+=	${S}/${TARGET_ARCH}/linux32
+.endif
+
+#
+# generate the necessary targets
+#
+.for target in ${ALL}
+${target}:	mfiles ${.OBJDIR}/${target}/${target}.tag
+
+${.OBJDIR}/${target}/${target}.tag:
+	@cd ${.OBJDIR} && \
+		env DOXYGEN_INCLUDE_PATH=${.CURDIR} \
+		    DOXYGEN_SRC_PATH=${S}  \
+		    DOXYGEN_DEST_PATH=${DOXYGEN_DEST_PATH} \
+		    DOXYGEN_SRC_INCLUDE_PATH="${S}/sys ${S}/../include ${S}/${TARGET_ARCH}/include" \
+		    DOXYGEN_TARGET_ARCH=${TARGET_ARCH} \
+		    DOXYGEN_LINUX_PATH=${DOXYGEN_LINUX_PATH} \
+			doxygen ${.CURDIR}/Doxyfile-${target}
+	@echo "API docs for ${target} are now available in ${.OBJDIR}/${target}/." | /usr/bin/fmt
+
+pdf-${target}:	${.OBJDIR}/${target}/${target}.tag
+	@cd ${DOXYGEN_LATEX_DEST_PATH}/${target}/latex && ${MAKE} refman.pdf && cp refman.pdf ${DOXYGEN_PDF_DEST_PATH}/${target}.pdf
+	@echo "API docs for ${target} are now available in ${DOXYGEN_PDF_DEST_PATH}/." | /usr/bin/fmt
+
+CLEANDIRS+=	${DOXYGEN_DEST_PATH}/${target}
+CLEANDIRS+=	${.OBJDIR}/${target}/
+CLEANFILES+=	${DOXYGEN_PDF_DEST_PATH}/${target}.pdf
+clean-${target}:
+	rm -rf ${DOXYGEN_DEST_PATH}/${target} ${.OBJDIR}/${target}
+.endfor
+
+.for file in ${MFILES}
+CLEANDIRS+=     ${.OBJDIR}/${file:T:S/.m$/.h/}
+${.OBJDIR}/${file:T:S/.m$/.h/}: ${S}/${file}
+	cd ${.OBJDIR}; ${AWK} -f $S/tools/makeobjops.awk ${S}/${file} -h
+.endfor
+
+#
+# update target for the config files {config syntax change}
+#
+update-doxys:
+.for config_file in ${_ALL}
+	@doxygen -u ${config_file}
+.endfor
+
+.include "Dependencies"
+.include <bsd.obj.mk>
diff --git a/tools/kerneldoc/subsys/README b/tools/kerneldoc/subsys/README
new file mode 100644
index 0000000..9a70bf0
--- /dev/null
+++ b/tools/kerneldoc/subsys/README
@@ -0,0 +1,32 @@
+       The kernel subsystem API documentation generation framework.
+      --------------------------------------------------------------
+
+For every Doxyfile-(.*) the Makefile adds the public targets $1, pdf-$1 and
+clean-$1. For e.g. Doxyfile-dev_pci this translates to the targets dev_pci,
+pdf-dev_pci and clean-dev_pci.
+
+Additionally, the targets 'all', 'pdf-all' and 'clean' to generate or remove
+the documentation for all targets are available.
+
+The file 'Dependencies' contains dependencies for the .tag files.
+
+To add another part to the documentation just copy a Doxyfile and add
+the necessary dependencies to the file 'Dependencies'.
+
+The following environment variables can be used in the Doxyfile:
+ - DOXYGEN_SRC_PATH		(/usr/src/sys)
+ - DOXYGEN_DEST_PATH		(where the docs are generated)
+ - DOXYGEN_TARGET_ARCH		(${TARGET_ARCH} if set, else ${MACHINE_ARCH})
+
+For the PDF generation you may have to change some limits in the latex
+configuration (the build may fail and an error about e.g. "pool size" is
+shown), for print/teTeX this is done in
+	/usr/local/share/texmf/web2c/texmf.cnf
+
+Programs needed to generate the API docs:
+ - devel/doxygen
+ - print/teTeX
+ - graphics/graphviz
+
+-- 
+$FreeBSD$
diff --git a/tools/kerneldoc/subsys/common-Doxyfile b/tools/kerneldoc/subsys/common-Doxyfile
new file mode 100644
index 0000000..5372418
--- /dev/null
+++ b/tools/kerneldoc/subsys/common-Doxyfile
@@ -0,0 +1,266 @@
+# Doxyfile 1.4.1
+
+# $FreeBSD$
+
+#---------------------------------------------------------------------------
+# Project related configuration options
+#---------------------------------------------------------------------------
+PROJECT_NUMBER         = 
+CREATE_SUBDIRS         = YES
+OUTPUT_LANGUAGE        = English
+USE_WINDOWS_ENCODING   = NO
+BRIEF_MEMBER_DESC      = YES
+REPEAT_BRIEF           = YES
+ABBREVIATE_BRIEF       = "The $name class" \
+                         "The $name widget" \
+                         "The $name file" \
+                         is \
+                         provides \
+                         specifies \
+                         contains \
+                         represents \
+                         a \
+                         an \
+                         the
+ALWAYS_DETAILED_SEC    = NO
+INLINE_INHERITED_MEMB  = NO
+FULL_PATH_NAMES        = YES
+STRIP_FROM_PATH        = 
+STRIP_FROM_INC_PATH    = 
+SHORT_NAMES            = NO
+JAVADOC_AUTOBRIEF      = NO
+MULTILINE_CPP_IS_BRIEF = NO
+DETAILS_AT_TOP         = NO
+INHERIT_DOCS           = YES
+DISTRIBUTE_GROUP_DOC   = NO
+TAB_SIZE               = 8
+ALIASES                = 
+OPTIMIZE_OUTPUT_FOR_C  = YES
+OPTIMIZE_OUTPUT_JAVA   = NO
+SUBGROUPING            = YES
+#---------------------------------------------------------------------------
+# Build related configuration options
+#---------------------------------------------------------------------------
+EXTRACT_PRIVATE        = YES
+EXTRACT_STATIC         = YES
+EXTRACT_LOCAL_CLASSES  = YES
+EXTRACT_LOCAL_METHODS  = NO
+HIDE_UNDOC_MEMBERS     = NO
+HIDE_UNDOC_CLASSES     = NO
+HIDE_FRIEND_COMPOUNDS  = NO
+HIDE_IN_BODY_DOCS      = NO
+INTERNAL_DOCS          = YES
+CASE_SENSE_NAMES       = YES
+HIDE_SCOPE_NAMES       = NO
+SHOW_INCLUDE_FILES     = YES
+INLINE_INFO            = YES
+SORT_MEMBER_DOCS       = YES
+SORT_BRIEF_DOCS        = NO
+SORT_BY_SCOPE_NAME     = NO
+GENERATE_TODOLIST      = YES
+GENERATE_TESTLIST      = YES
+GENERATE_BUGLIST       = YES
+GENERATE_DEPRECATEDLIST= YES
+ENABLED_SECTIONS       = 
+MAX_INITIALIZER_LINES  = 30
+SHOW_USED_FILES        = YES
+SHOW_DIRECTORIES       = YES
+FILE_VERSION_FILTER    = 
+#---------------------------------------------------------------------------
+# configuration options related to warning and progress messages
+#---------------------------------------------------------------------------
+QUIET                  = NO
+WARNINGS               = YES
+WARN_IF_UNDOCUMENTED   = YES
+WARN_IF_DOC_ERROR      = YES
+WARN_NO_PARAMDOC       = NO
+WARN_FORMAT            = "$file:$line: $text"
+WARN_LOGFILE           = 
+#---------------------------------------------------------------------------
+# configuration options related to the input files
+#---------------------------------------------------------------------------
+FILE_PATTERNS          = *.c \
+                         *.cc \
+                         *.cxx \
+                         *.cpp \
+                         *.c++ \
+                         *.java \
+                         *.ii \
+                         *.ixx \
+                         *.ipp \
+                         *.i++ \
+                         *.inl \
+                         *.h \
+                         *.hh \
+                         *.hxx \
+                         *.hpp \
+                         *.h++ \
+                         *.idl \
+                         *.odl \
+                         *.cs \
+                         *.php \
+                         *.php3 \
+                         *.inc \
+                         *.m \
+                         *.mm \
+                         *.dox \
+                         *.C \
+                         *.CC \
+                         *.C++ \
+                         *.II \
+                         *.I++ \
+                         *.H \
+                         *.HH \
+                         *.H++ \
+                         *.CS \
+                         *.PHP \
+                         *.PHP3 \
+                         *.M \
+                         *.MM
+RECURSIVE              = YES
+EXCLUDE                = 
+EXCLUDE_SYMLINKS       = NO
+EXCLUDE_PATTERNS       = */.\#*
+EXAMPLE_PATH           = 
+EXAMPLE_PATTERNS       = *
+EXAMPLE_RECURSIVE      = NO
+IMAGE_PATH             = 
+INPUT_FILTER           = 
+FILTER_PATTERNS        = 
+FILTER_SOURCE_FILES    = NO
+#---------------------------------------------------------------------------
+# configuration options related to source browsing
+#---------------------------------------------------------------------------
+SOURCE_BROWSER         = YES
+INLINE_SOURCES         = NO
+STRIP_CODE_COMMENTS    = YES
+REFERENCED_BY_RELATION = YES
+REFERENCES_RELATION    = YES
+VERBATIM_HEADERS       = YES
+#---------------------------------------------------------------------------
+# configuration options related to the alphabetical class index
+#---------------------------------------------------------------------------
+ALPHABETICAL_INDEX     = NO
+COLS_IN_ALPHA_INDEX    = 5
+IGNORE_PREFIX          = 
+#---------------------------------------------------------------------------
+# configuration options related to the HTML output
+#---------------------------------------------------------------------------
+GENERATE_HTML          = YES
+HTML_OUTPUT            = html
+HTML_FILE_EXTENSION    = .html
+HTML_HEADER            = 
+HTML_FOOTER            = 
+HTML_STYLESHEET        = 
+HTML_ALIGN_MEMBERS     = YES
+GENERATE_HTMLHELP      = NO
+CHM_FILE               = 
+HHC_LOCATION           = 
+GENERATE_CHI           = NO
+BINARY_TOC             = NO
+TOC_EXPAND             = NO
+DISABLE_INDEX          = NO
+ENUM_VALUES_PER_LINE   = 4
+GENERATE_TREEVIEW      = YES
+TREEVIEW_WIDTH         = 250
+#---------------------------------------------------------------------------
+# configuration options related to the LaTeX output
+#---------------------------------------------------------------------------
+GENERATE_LATEX         = YES
+LATEX_OUTPUT           = latex
+LATEX_CMD_NAME         = latex
+MAKEINDEX_CMD_NAME     = makeindex
+COMPACT_LATEX          = NO
+PAPER_TYPE             = a4wide
+EXTRA_PACKAGES         = 
+LATEX_HEADER           = 
+PDF_HYPERLINKS         = YES
+USE_PDFLATEX           = YES
+LATEX_BATCHMODE        = NO
+LATEX_HIDE_INDICES     = NO
+#---------------------------------------------------------------------------
+# configuration options related to the RTF output
+#---------------------------------------------------------------------------
+GENERATE_RTF           = NO
+RTF_OUTPUT             = rtf
+COMPACT_RTF            = NO
+RTF_HYPERLINKS         = NO
+RTF_STYLESHEET_FILE    = 
+RTF_EXTENSIONS_FILE    = 
+#---------------------------------------------------------------------------
+# configuration options related to the man page output
+#---------------------------------------------------------------------------
+GENERATE_MAN           = NO
+MAN_OUTPUT             = man
+MAN_EXTENSION          = .3
+MAN_LINKS              = NO
+#---------------------------------------------------------------------------
+# configuration options related to the XML output
+#---------------------------------------------------------------------------
+GENERATE_XML           = NO
+XML_OUTPUT             = xml
+XML_SCHEMA             = 
+XML_DTD                = 
+XML_PROGRAMLISTING     = YES
+#---------------------------------------------------------------------------
+# configuration options for the AutoGen Definitions output
+#---------------------------------------------------------------------------
+GENERATE_AUTOGEN_DEF   = NO
+#---------------------------------------------------------------------------
+# configuration options related to the Perl module output
+#---------------------------------------------------------------------------
+GENERATE_PERLMOD       = NO
+PERLMOD_LATEX          = NO
+PERLMOD_PRETTY         = YES
+PERLMOD_MAKEVAR_PREFIX = 
+#---------------------------------------------------------------------------
+# Configuration options related to the preprocessor   
+#---------------------------------------------------------------------------
+ENABLE_PREPROCESSING   = YES
+MACRO_EXPANSION        = YES
+EXPAND_ONLY_PREDEF     = YES
+SEARCH_INCLUDES        = YES
+INCLUDE_PATH           = $(DOXYGEN_SRC_INCLUDE_PATH) .
+INCLUDE_FILE_PATTERNS  = *.h
+PREDEFINED             = "_KERNEL" \
+			 "__FreeBSD__=7" \
+			 "__${TARGET_ARCH}__=1" \
+			 "__${TARGET_ARCH}=1"
+EXPAND_AS_DEFINED      = 
+SKIP_FUNCTION_MACROS   = YES
+#---------------------------------------------------------------------------
+# Configuration::additions related to external references   
+#---------------------------------------------------------------------------
+ALLEXTERNALS           = NO
+EXTERNAL_GROUPS        = YES
+PERL_PATH              = /usr/bin/perl
+#---------------------------------------------------------------------------
+# Configuration options related to the dot tool   
+#---------------------------------------------------------------------------
+CLASS_DIAGRAMS         = NO
+HIDE_UNDOC_RELATIONS   = YES
+HAVE_DOT               = YES
+CLASS_GRAPH            = YES
+COLLABORATION_GRAPH    = YES
+GROUP_GRAPHS           = YES
+UML_LOOK               = NO
+TEMPLATE_RELATIONS     = NO
+INCLUDE_GRAPH          = YES
+INCLUDED_BY_GRAPH      = YES
+CALL_GRAPH             = YES
+GRAPHICAL_HIERARCHY    = YES
+DIRECTORY_GRAPH        = YES
+DOT_IMAGE_FORMAT       = png
+DOT_PATH               = 
+DOTFILE_DIRS           = 
+MAX_DOT_GRAPH_WIDTH    = 1024
+MAX_DOT_GRAPH_HEIGHT   = 1024
+MAX_DOT_GRAPH_DEPTH    = 1000
+DOT_TRANSPARENT        = NO
+DOT_MULTI_TARGETS      = YES
+GENERATE_LEGEND        = YES
+DOT_CLEANUP            = YES
+#---------------------------------------------------------------------------
+# Configuration::additions related to the search engine   
+#---------------------------------------------------------------------------
+SEARCHENGINE           = NO