path: root/meta/classes/kernel.bbclass

inherit linux-kernel-base module_strip

PROVIDES += "virtual/kernel"
DEPENDS += "virtual/${TARGET_PREFIX}depmod-${@get_kernelmajorversion('${PV}')} virtual/${TARGET_PREFIX}gcc${KERNEL_CCSUFFIX} update-modules"

inherit kernel-arch

PACKAGES_DYNAMIC += "kernel-module-*"
PACKAGES_DYNAMIC += "kernel-image-*"

export OS = "${TARGET_OS}"
export CROSS_COMPILE = "${TARGET_PREFIX}"
KERNEL_IMAGETYPE ?= "zImage"

KERNEL_PRIORITY = "${@bb.data.getVar('PV',d,1).split('-')[0].split('.')[-1]}"

KERNEL_RELEASE ?= "${KERNEL_VERSION}"

KERNEL_CCSUFFIX ?= ""
KERNEL_LDSUFFIX ?= ""

# Set TARGET_??_KERNEL_ARCH in the machine .conf to set architecture
# specific options necessary for building the kernel and modules.
#FIXME: should be this: TARGET_CC_KERNEL_ARCH ?= "${TARGET_CC_ARCH}"
TARGET_CC_KERNEL_ARCH ?= ""
HOST_CC_KERNEL_ARCH ?= "${TARGET_CC_KERNEL_ARCH}"
TARGET_LD_KERNEL_ARCH ?= ""
HOST_LD_KERNEL_ARCH ?= "${TARGET_LD_KERNEL_ARCH}"

KERNEL_CC = "${CCACHE}${HOST_PREFIX}gcc${KERNEL_CCSUFFIX} ${HOST_CC_KERNEL_ARCH}"
KERNEL_LD = "${LD}${KERNEL_LDSUFFIX} ${HOST_LD_KERNEL_ARCH}"

KERNEL_OUTPUT = "arch/${ARCH}/boot/${KERNEL_IMAGETYPE}"
KERNEL_IMAGEDEST = "boot"

#
# configuration
#
export CMDLINE_CONSOLE = "console=${@bb.data.getVar("KERNEL_CONSOLE",d,1) or "ttyS0"}"

KERNEL_VERSION = "${@get_kernelversion('${S}')}"
KERNEL_MAJOR_VERSION = "${@get_kernelmajorversion('${KERNEL_VERSION}')}"

KERNEL_LOCALVERSION ?= ""

# kernels are generally machine specific
PACKAGE_ARCH = "${MACHINE_ARCH}"

kernel_do_compile() {
	unset CFLAGS CPPFLAGS CXXFLAGS LDFLAGS MACHINE
	oe_runmake include/linux/version.h CC="${KERNEL_CC}" LD="${KERNEL_LD}"
	if [ "${KERNEL_MAJOR_VERSION}" != "2.6" ]; then
		oe_runmake dep CC="${KERNEL_CC}" LD="${KERNEL_LD}"
	fi
	oe_runmake ${KERNEL_IMAGETYPE} CC="${KERNEL_CC}" LD="${KERNEL_LD}"
	if (grep -q -i -e '^CONFIG_MODULES=y$' .config); then
		oe_runmake modules  CC="${KERNEL_CC}" LD="${KERNEL_LD}"
	else
		oenote "no modules to compile"
	fi
}

kernel_do_stage() {
	ASMDIR=`readlink include/asm`

	mkdir -p ${STAGING_KERNEL_DIR}/include/$ASMDIR
	cp -fR include/$ASMDIR/* ${STAGING_KERNEL_DIR}/include/$ASMDIR/
	rm -f $ASMDIR ${STAGING_KERNEL_DIR}/include/asm
	ln -sf $ASMDIR ${STAGING_KERNEL_DIR}/include/asm

	mkdir -p ${STAGING_KERNEL_DIR}/include/asm-generic
	cp -fR include/asm-generic/* ${STAGING_KERNEL_DIR}/include/asm-generic/

	mkdir -p ${STAGING_KERNEL_DIR}/include/linux
	cp -fR include/linux/* ${STAGING_KERNEL_DIR}/include/linux/

	mkdir -p ${STAGING_KERNEL_DIR}/include/net
	cp -fR include/net/* ${STAGING_KERNEL_DIR}/include/net/

	mkdir -p ${STAGING_KERNEL_DIR}/include/pcmcia
	cp -fR include/pcmcia/* ${STAGING_KERNEL_DIR}/include/pcmcia/

	for entry in drivers/crypto include/media include/acpi include/sound include/video; do
		if [ -d $entry ]; then
			mkdir -p ${STAGING_KERNEL_DIR}/$entry
			cp -fR $entry/* ${STAGING_KERNEL_DIR}/$entry/
		fi
	done

	if [ -d drivers/sound ]; then
		# 2.4 alsa needs some headers from this directory
		mkdir -p ${STAGING_KERNEL_DIR}/include/drivers/sound
		cp -fR drivers/sound/*.h ${STAGING_KERNEL_DIR}/include/drivers/sound/
	fi

	install -m 0644 .config ${STAGING_KERNEL_DIR}/config-${KERNEL_VERSION}
	ln -sf config-${KERNEL_VERSION} ${STAGING_KERNEL_DIR}/.config
	ln -sf config-${KERNEL_VERSION} ${STAGING_KERNEL_DIR}/kernel-config
	echo "${KERNEL_VERSION}" >${STAGING_KERNEL_DIR}/kernel-abiversion
	echo "${S}" >${STAGING_KERNEL_DIR}/kernel-source
	echo "${KERNEL_CCSUFFIX}" >${STAGING_KERNEL_DIR}/kernel-ccsuffix
	echo "${KERNEL_LDSUFFIX}" >${STAGING_KERNEL_DIR}/kernel-ldsuffix
	[ -e Rules.make ] && install -m 0644 Rules.make ${STAGING_KERNEL_DIR}/
	[ -e Makefile ] && install -m 0644 Makefile ${STAGING_KERNEL_DIR}/
	
	# Check if arch/${ARCH}/Makefile exists and install it
	if [ -e arch/${ARCH}/Makefile ]; then
		install -d ${STAGING_KERNEL_DIR}/arch/${ARCH}
		install -m 0644 arch/${ARCH}/Makefile* ${STAGING_KERNEL_DIR}/arch/${ARCH}
	fi
	cp -fR include/config* ${STAGING_KERNEL_DIR}/include/	
	install -m 0644 ${KERNEL_OUTPUT} ${STAGING_KERNEL_DIR}/${KERNEL_IMAGETYPE}
	install -m 0644 System.map ${STAGING_KERNEL_DIR}/System.map-${KERNEL_VERSION}
	[ -e Module.symvers ] && install -m 0644 Module.symvers ${STAGING_KERNEL_DIR}/

	cp -fR scripts ${STAGING_KERNEL_DIR}/
}

kernel_do_install() {
	unset CFLAGS CPPFLAGS CXXFLAGS LDFLAGS MACHINE
	if (grep -q -i -e '^CONFIG_MODULES=y$' .config); then
		oe_runmake DEPMOD=echo INSTALL_MOD_PATH="${D}" modules_install
	else
		oenote "no modules to install"
	fi
	
	install -d ${D}/${KERNEL_IMAGEDEST}
	install -d ${D}/boot
	install -m 0644 ${KERNEL_OUTPUT} ${D}/${KERNEL_IMAGEDEST}/${KERNEL_IMAGETYPE}-${KERNEL_VERSION}
	install -m 0644 System.map ${D}/boot/System.map-${KERNEL_VERSION}
	install -m 0644 .config ${D}/boot/config-${KERNEL_VERSION}
	install -m 0644 vmlinux ${D}/boot/vmlinux-${KERNEL_VERSION}
	install -d ${D}/etc/modutils
	if [ "${KERNEL_MAJOR_VERSION}" = "2.6" ]; then
		install -d ${D}/etc/modprobe.d
	fi
	
        # Check if scripts/genksyms exists and if so, build it
        if [ -e scripts/genksyms/ ]; then
                oe_runmake SUBDIRS="scripts/genksyms"
        fi

        install -d ${STAGING_KERNEL_DIR}
        cp -fR scripts ${STAGING_KERNEL_DIR}/
}

kernel_do_configure() {
        yes '' | oe_runmake oldconfig
}

do_menuconfig() {
	export TERMWINDOWTITLE="${PN} Kernel Configuration"
	export SHELLCMDS="make menuconfig"
	${TERMCMDRUN}
	if [ $? -ne 0 ]; then
		echo "Fatal: '${TERMCMD}' not found. Check TERMCMD variable."
		exit 1
	fi
}
do_menuconfig[nostamp] = "1"
addtask menuconfig after do_patch

pkg_postinst_kernel () {
	cd /${KERNEL_IMAGEDEST}; update-alternatives --install /${KERNEL_IMAGEDEST}/${KERNEL_IMAGETYPE} ${KERNEL_IMAGETYPE} ${KERNEL_IMAGETYPE}-${KERNEL_VERSION} ${KERNEL_PRIORITY} || true
}

pkg_postrm_kernel () {
	cd /${KERNEL_IMAGEDEST}; update-alternatives --remove ${KERNEL_IMAGETYPE} ${KERNEL_IMAGETYPE}-${KERNEL_VERSION} || true
}

inherit cml1

EXPORT_FUNCTIONS do_compile do_install do_stage do_configure

# kernel-base becomes kernel-${KERNEL_VERSION}
# kernel-image becomes kernel-image-${KERNEL_VERISON}
PACKAGES = "kernel kernel-base kernel-image kernel-dev kernel-vmlinux"
FILES = ""
FILES_kernel-image = "/boot/${KERNEL_IMAGETYPE}*"
FILES_kernel-dev = "/boot/System.map* /boot/config*"
FILES_kernel-vmlinux = "/boot/vmlinux*"
RDEPENDS_kernel = "kernel-base"
# Allow machines to override this dependency if kernel image files are 
# not wanted in images as standard
RDEPENDS_kernel-base ?= "kernel-image"
PKG_kernel-image = "kernel-image-${KERNEL_VERSION}"
PKG_kernel-base = "kernel-${KERNEL_VERSION}"
ALLOW_EMPTY_kernel = "1"
ALLOW_EMPTY_kernel-base = "1"
ALLOW_EMPTY_kernel-image = "1"

# Userspace workarounds for kernel modules issues
# This is shame, fix the kernel instead!
DEPENDS_kernel-module-dtl1-cs = "bluez-dtl1-workaround"
RDEPENDS_kernel-module-dtl1-cs = "bluez-dtl1-workaround"

pkg_postinst_kernel-image () {
if [ ! -e "$D/lib/modules/${KERNEL_VERSION}" ]; then
	mkdir -p $D/lib/modules/${KERNEL_VERSION}
fi
if [ -n "$D" ]; then
	${HOST_PREFIX}depmod-${KERNEL_MAJOR_VERSION} -A -b $D -F ${STAGING_KERNEL_DIR}/System.map-${KERNEL_VERSION} ${KERNEL_VERSION}
else
	depmod -a
fi
}

pkg_postinst_modules () {
if [ -n "$D" ]; then
	${HOST_PREFIX}depmod-${KERNEL_MAJOR_VERSION} -A -b $D -F ${STAGING_KERNEL_DIR}/System.map-${KERNEL_VERSION} ${KERNEL_VERSION}
else
	depmod -a
	update-modules || true
fi
}

pkg_postrm_modules () {
update-modules || true
}

autoload_postinst_fragment() {
if [ x"$D" = "x" ]; then
	modprobe %s || true
fi
}

# autoload defaults (alphabetically sorted)
module_autoload_hidp = "hidp"
module_autoload_ipv6 = "ipv6"
module_autoload_ipsec = "ipsec"
module_autoload_ircomm-tty = "ircomm-tty"
module_autoload_rfcomm = "rfcomm"
module_autoload_sa1100-rtc = "sa1100-rtc"

# alias defaults (alphabetically sorted)
module_conf_af_packet = "alias net-pf-17 af_packet"
module_conf_bluez = "alias net-pf-31 bluez"
module_conf_bnep = "alias bt-proto-4 bnep"
module_conf_hci_uart = "alias tty-ldisc-15 hci_uart"
module_conf_l2cap = "alias bt-proto-0 l2cap"
module_conf_sco = "alias bt-proto-2 sco"
module_conf_rfcomm = "alias bt-proto-3 rfcomm"

python populate_packages_prepend () {
	def extract_modinfo(file):
		import os, re
		tmpfile = os.tmpnam()
		cmd = "PATH=\"%s\" %sobjcopy -j .modinfo -O binary %s %s" % (bb.data.getVar("PATH", d, 1), bb.data.getVar("HOST_PREFIX", d, 1) or "", file, tmpfile)
		os.system(cmd)
		f = open(tmpfile)
		l = f.read().split("\000")
		f.close()
		os.unlink(tmpfile)
		exp = re.compile("([^=]+)=(.*)")
		vals = {}
		for i in l:
			m = exp.match(i)
			if not m:
				continue
			vals[m.group(1)] = m.group(2)
		return vals
	
	def parse_depmod():
		import os, re

		dvar = bb.data.getVar('D', d, 1)
		if not dvar:
			bb.error("D not defined")
			return

		kernelver = bb.data.getVar('KERNEL_VERSION', d, 1)
		kernelver_stripped = kernelver
		m = re.match('^(.*-hh.*)[\.\+].*$', kernelver)
		if m:
			kernelver_stripped = m.group(1)
		path = bb.data.getVar("PATH", d, 1)
		host_prefix = bb.data.getVar("HOST_PREFIX", d, 1) or ""
		major_version = bb.data.getVar('KERNEL_MAJOR_VERSION', d, 1)

		cmd = "PATH=\"%s\" %sdepmod-%s -n -a -r -b %s -F %s/boot/System.map-%s %s" % (path, host_prefix, major_version, dvar, dvar, kernelver, kernelver_stripped)
		f = os.popen(cmd, 'r')

		deps = {}
		pattern0 = "^(.*\.k?o):..*$"
		pattern1 = "^(.*\.k?o):\s*(.*\.k?o)\s*$"
		pattern2 = "^(.*\.k?o):\s*(.*\.k?o)\s*\\\$"
		pattern3 = "^\t(.*\.k?o)\s*\\\$"
		pattern4 = "^\t(.*\.k?o)\s*$"

		line = f.readline()
		while line:
			if not re.match(pattern0, line):
				line = f.readline()
				continue
			m1 = re.match(pattern1, line)
			if m1:
				deps[m1.group(1)] = m1.group(2).split()
			else:
				m2 = re.match(pattern2, line)
				if m2:
					deps[m2.group(1)] = m2.group(2).split()
					line = f.readline()
					m3 = re.match(pattern3, line)
					while m3:
						deps[m2.group(1)].extend(m3.group(1).split())
						line = f.readline()
						m3 = re.match(pattern3, line)
					m4 = re.match(pattern4, line)
					deps[m2.group(1)].extend(m4.group(1).split())
			line = f.readline()
		f.close()
		return deps
	
	def get_dependencies(file, pattern, format):
		file = file.replace(bb.data.getVar('D', d, 1) or '', '', 1)

		if module_deps.has_key(file):
			import os.path, re
			dependencies = []
			for i in module_deps[file]:
				m = re.match(pattern, os.path.basename(i))
				if not m:
					continue
				on = legitimize_package_name(m.group(1))
				dependency_pkg = format % on
				dependencies.append(dependency_pkg)
			return dependencies
		return []

	def frob_metadata(file, pkg, pattern, format, basename):
		import re
		vals = extract_modinfo(file)

		dvar = bb.data.getVar('D', d, 1)

		# If autoloading is requested, output /etc/modutils/<name> and append
		# appropriate modprobe commands to the postinst
		autoload = bb.data.getVar('module_autoload_%s' % basename, d, 1)
		if autoload:
			name = '%s/etc/modutils/%s' % (dvar, basename)
			f = open(name, 'w')
			for m in autoload.split():
				f.write('%s\n' % m)
			f.close()
			postinst = bb.data.getVar('pkg_postinst_%s' % pkg, d, 1)
			if not postinst:
				bb.fatal("pkg_postinst_%s not defined" % pkg)
			postinst += bb.data.getVar('autoload_postinst_fragment', d, 1) % autoload
			bb.data.setVar('pkg_postinst_%s' % pkg, postinst, d)

		# Write out any modconf fragment
		modconf = bb.data.getVar('module_conf_%s' % basename, d, 1)
		if modconf:
			if bb.data.getVar("KERNEL_MAJOR_VERSION", d, 1) == "2.6":
				name = '%s/etc/modprobe.d/%s.conf' % (dvar, basename)
			else:
				name = '%s/etc/modutils/%s.conf' % (dvar, basename)
			f = open(name, 'w')
			f.write("%s\n" % modconf)
			f.close()

		files = bb.data.getVar('FILES_%s' % pkg, d, 1)
		files = "%s /etc/modutils/%s /etc/modutils/%s.conf /etc/modprobe.d/%s.conf" % (files, basename, basename, basename)
		bb.data.setVar('FILES_%s' % pkg, files, d)

		if vals.has_key("description"):
			old_desc = bb.data.getVar('DESCRIPTION_' + pkg, d, 1) or ""
			bb.data.setVar('DESCRIPTION_' + pkg, old_desc + "; " + vals["description"], d)

		rdepends_str = bb.data.getVar('RDEPENDS_' + pkg, d, 1)
		if rdepends_str:
			rdepends = rdepends_str.split()
		else:
			rdepends = []
		rdepends.extend(get_dependencies(file, pattern, format))
		bb.data.setVar('RDEPENDS_' + pkg, ' '.join(rdepends), d)

	module_deps = parse_depmod()
	module_regex = '^(.*)\.k?o$'
	module_pattern = 'kernel-module-%s'

	postinst = bb.data.getVar('pkg_postinst_modules', d, 1)
	postrm = bb.data.getVar('pkg_postrm_modules', d, 1)
	do_split_packages(d, root='/lib/modules', file_regex=module_regex, output_pattern=module_pattern, description='%s kernel module', postinst=postinst, postrm=postrm, recursive=True, hook=frob_metadata, extra_depends='update-modules kernel-%s' % bb.data.getVar("KERNEL_VERSION", d, 1))

	import re, os
	metapkg = "kernel-modules"
	bb.data.setVar('ALLOW_EMPTY_' + metapkg, "1", d)
	bb.data.setVar('FILES_' + metapkg, "", d)
	blacklist = [ 'kernel-dev', 'kernel-image', 'kernel-base' ]
	for l in module_deps.values():
		for i in l:
			pkg = module_pattern % legitimize_package_name(re.match(module_regex, os.path.basename(i)).group(1))
			blacklist.append(pkg)
	metapkg_rdepends = []
	packages = bb.data.getVar('PACKAGES', d, 1).split()
	for pkg in packages[1:]:
		if not pkg in blacklist and not pkg in metapkg_rdepends:
			metapkg_rdepends.append(pkg)
	bb.data.setVar('RDEPENDS_' + metapkg, ' '.join(metapkg_rdepends), d)
	bb.data.setVar('DESCRIPTION_' + metapkg, 'Kernel modules meta package', d)
	packages.append(metapkg)
	bb.data.setVar('PACKAGES', ' '.join(packages), d)
}

# Support checking the kernel size since some kernels need to reside in partitions
# with a fixed length or there is a limit in transferring the kernel to memory
do_sizecheck() {
        if [ ! -z "${KERNEL_IMAGE_MAXSIZE}" ]; then
            size=`ls -l arch/${ARCH}/boot/${KERNEL_IMAGETYPE} | awk '{ print $5}'`
            if [ $size -ge ${KERNEL_IMAGE_MAXSIZE} ]; then
                    rm arch/${ARCH}/boot/${KERNEL_IMAGETYPE}
                    die  "This kernel (size=$size > ${KERNEL_IMAGE_MAXSIZE}) is too big for your device. Please reduce the size of the kernel by making more of it modular."
            fi
        fi
}

addtask sizecheck before do_install after do_compile