summaryrefslogtreecommitdiff
path: root/meta/classes/kernel.bbclass
blob: f3a55535fbf1f99cd93e2fdd6e1813b6450e8327 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
inherit linux-kernel-base module_strip kernel-module-split

PROVIDES += "virtual/kernel"
DEPENDS += "virtual/${TARGET_PREFIX}gcc kmod-native depmodwrapper-cross"

# we include gcc above, we dont need virtual/libc
INHIBIT_DEFAULT_DEPS = "1"

KERNEL_IMAGETYPE ?= "zImage"
INITRAMFS_IMAGE ?= ""
INITRAMFS_TASK ?= ""

python __anonymous () {
    kerneltype = d.getVar('KERNEL_IMAGETYPE', True) or ''
    if kerneltype == 'uImage':
        depends = d.getVar("DEPENDS", True)
        depends = "%s u-boot-mkimage-native" % depends
        d.setVar("DEPENDS", depends)

    image = d.getVar('INITRAMFS_IMAGE', True)
    if image:
        d.setVar('INITRAMFS_TASK', '${INITRAMFS_IMAGE}:do_rootfs')
}

inherit kernel-arch deploy

PACKAGES_DYNAMIC += "^kernel-module-.*"
PACKAGES_DYNAMIC += "^kernel-image-.*"
PACKAGES_DYNAMIC += "^kernel-firmware-.*"

export OS = "${TARGET_OS}"
export CROSS_COMPILE = "${TARGET_PREFIX}"

KERNEL_PRIORITY ?= "${@int(d.getVar('PV',1).split('-')[0].split('+')[0].split('.')[0]) * 10000 + \
                       int(d.getVar('PV',1).split('-')[0].split('+')[0].split('.')[1]) * 100 + \
                       int(d.getVar('PV',1).split('-')[0].split('+')[0].split('.')[-1])}"

KERNEL_RELEASE ?= "${KERNEL_VERSION}"

# Where built kernel lies in the kernel tree
KERNEL_OUTPUT ?= "arch/${ARCH}/boot/${KERNEL_IMAGETYPE}"
KERNEL_IMAGEDEST = "boot"

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

KERNEL_VERSION = "${@get_kernelversion('${B}')}"

KERNEL_LOCALVERSION ?= ""

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

# U-Boot support
UBOOT_ENTRYPOINT ?= "20008000"
UBOOT_LOADADDRESS ?= "${UBOOT_ENTRYPOINT}"

# Some Linux kenrel configurations need additional parameters on the command line
KERNEL_EXTRA_ARGS ?= ""

# For the kernel, we don't want the '-e MAKEFLAGS=' in EXTRA_OEMAKE.
# We don't want to override kernel Makefile variables from the environment
EXTRA_OEMAKE = ""

KERNEL_ALT_IMAGETYPE ??= ""

# Define where the kernel headers are installed on the target as well as where
# they are staged.
KERNEL_SRC_PATH = "/usr/src/kernel"

KERNEL_IMAGETYPE_FOR_MAKE = "${@(lambda s: s[:-3] if s[-3:] == ".gz" else s)(d.getVar('KERNEL_IMAGETYPE', True))}"

kernel_do_compile() {
	unset CFLAGS CPPFLAGS CXXFLAGS LDFLAGS MACHINE
	oe_runmake ${KERNEL_IMAGETYPE_FOR_MAKE} ${KERNEL_ALT_IMAGETYPE} CC="${KERNEL_CC}" LD="${KERNEL_LD}" ${KERNEL_EXTRA_ARGS}
	if test "${KERNEL_IMAGETYPE_FOR_MAKE}.gz" = "${KERNEL_IMAGETYPE}"; then
		gzip -9c < "${KERNEL_IMAGETYPE_FOR_MAKE}" > "${KERNEL_OUTPUT}"
	fi
}

do_compile_kernelmodules() {
	unset CFLAGS CPPFLAGS CXXFLAGS LDFLAGS MACHINE
	if (grep -q -i -e '^CONFIG_MODULES=y$' .config); then
		oe_runmake ${PARALLEL_MAKE} modules CC="${KERNEL_CC}" LD="${KERNEL_LD}" ${KERNEL_EXTRA_ARGS}
	else
		bbnote "no modules to compile"
	fi
}
addtask compile_kernelmodules after do_compile before do_strip

kernel_do_install() {
	#
	# First install the modules
	#
	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
		rm "${D}/lib/modules/${KERNEL_VERSION}/build"
		rm "${D}/lib/modules/${KERNEL_VERSION}/source"
	else
		bbnote "no modules to install"
	fi

	#
	# Install various kernel output (zImage, map file, config, module support files)
	#
	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}
	[ -e Module.symvers ] && install -m 0644 Module.symvers ${D}/boot/Module.symvers-${KERNEL_VERSION}
	install -d ${D}${sysconfdir}/modules-load.d
	install -d ${D}${sysconfdir}/modprobe.d

	#
	# Support for external module building - create a minimal copy of the
	# kernel source tree.
	#
	kerneldir=${D}${KERNEL_SRC_PATH}
	install -d $kerneldir

	#
	# Store the kernel version in sysroots for module-base.bbclass
	#

	echo "${KERNEL_VERSION}" > $kerneldir/kernel-abiversion

	#
	# Store kernel image name to allow use during image generation
	#

	echo "${KERNEL_IMAGE_BASE_NAME}" >$kerneldir/kernel-image-name

	#
	# Copy the entire source tree. In case an external build directory is
	# used, copy the build directory over first, then copy over the source
	# dir. This ensures the original Makefiles are used and not the
	# redirecting Makefiles in the build directory.
	#
	# work and sysroots can be on different partitions, so we can't rely on
	# hardlinking, unfortunately.
	#
	find . -depth -not -name "*.cmd" -not -name "*.o" -not -path "./.*" -print0 | cpio --null -pdu $kerneldir
	cp .config $kerneldir
	if [ "${S}" != "${B}" ]; then
		pwd="$PWD"
		cd "${S}"
		find . -depth -not -path "./.*" -print0 | cpio --null -pdu $kerneldir
		cd "$pwd"
	fi
	install -m 0644 ${KERNEL_OUTPUT} $kerneldir/${KERNEL_IMAGETYPE}
	install -m 0644 System.map $kerneldir/System.map-${KERNEL_VERSION}

	#
	# Clean and remove files not needed for building modules.
	# Some distributions go through a lot more trouble to strip out
	# unecessary headers, for now, we just prune the obvious bits.
	#
	# We don't want to leave host-arch binaries in /sysroots, so
	# we clean the scripts dir while leaving the generated config
	# and include files.
	#
	oe_runmake -C $kerneldir CC="${KERNEL_CC}" LD="${KERNEL_LD}" clean
	make -C $kerneldir _mrproper_scripts
	find $kerneldir -path $kerneldir/lib -prune -o -path $kerneldir/tools -prune -o -path $kerneldir/scripts -prune -o -name "*.[csS]" -exec rm '{}' \;
	find $kerneldir/Documentation -name "*.txt" -exec rm '{}' \;

	# As of Linux kernel version 3.0.1, the clean target removes
	# arch/powerpc/lib/crtsavres.o which is present in
	# KBUILD_LDFLAGS_MODULE, making it required to build external modules.
	if [ ${ARCH} = "powerpc" ]; then
		cp arch/powerpc/lib/crtsavres.o $kerneldir/arch/powerpc/lib/crtsavres.o
	fi

	# Necessary for building modules like compat-wireless.
	if [ -f include/generated/bounds.h ]; then
		cp include/generated/bounds.h $kerneldir/include/generated/bounds.h
	fi
	if [ -d arch/${ARCH}/include/generated ]; then
		mkdir -p $kerneldir/arch/${ARCH}/include/generated/
		cp -fR arch/${ARCH}/include/generated/* $kerneldir/arch/${ARCH}/include/generated/
	fi

	# Remove the following binaries which cause strip or arch QA errors
	# during do_package for cross-compiled platforms
	bin_files="arch/powerpc/boot/addnote arch/powerpc/boot/hack-coff \
	           arch/powerpc/boot/mktree scripts/kconfig/zconf.tab.o \
		   scripts/kconfig/conf.o scripts/kconfig/kxgettext.o"
	for entry in $bin_files; do
		rm -f $kerneldir/$entry
	done

	# kernels <2.6.30 don't have $kerneldir/tools directory so we check if it exists before calling sed
	if [ -f $kerneldir/tools/perf/Makefile ]; then
		# Fix SLANG_INC for slang.h
		sed -i 's#-I/usr/include/slang#-I=/usr/include/slang#g' $kerneldir/tools/perf/Makefile
	fi
}

sysroot_stage_all_append() {
	sysroot_stage_dir ${D}${KERNEL_SRC_PATH} ${SYSROOT_DESTDIR}${KERNEL_SRC_PATH}
}

kernel_do_configure() {
	# fixes extra + in /lib/modules/2.6.37+
	# $ scripts/setlocalversion . => +
	# $ make kernelversion => 2.6.37
	# $ make kernelrelease => 2.6.37+
	touch ${B}/.scmversion ${S}/.scmversion

	# Copy defconfig to .config if .config does not exist. This allows
	# recipes to manage the .config themselves in do_configure_prepend().
	if [ -f "${WORKDIR}/defconfig" ] && [ ! -f "${B}/.config" ]; then
		cp "${WORKDIR}/defconfig" "${B}/.config"
	fi
	yes '' | oe_runmake oldconfig

	if [ ! -z "${INITRAMFS_IMAGE}" ]; then
		for img in cpio.gz cpio.lzo cpio.lzma cpio.xz; do
		if [ -e "${DEPLOY_DIR_IMAGE}/${INITRAMFS_IMAGE}-${MACHINE}.$img" ]; then
			cp "${DEPLOY_DIR_IMAGE}/${INITRAMFS_IMAGE}-${MACHINE}.$img" initramfs.$img
		fi
		done
	fi
}

do_configure[depends] += "${INITRAMFS_TASK}"

do_savedefconfig() {
	oe_runmake savedefconfig
}
do_savedefconfig[nostamp] = "1"
addtask savedefconfig after do_configure

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

pkg_postrm_kernel-base () {
	update-alternatives --remove ${KERNEL_IMAGETYPE} ${KERNEL_IMAGETYPE}-${KERNEL_VERSION} || true
}

inherit cml1

EXPORT_FUNCTIONS do_compile do_install do_configure

# kernel-base becomes kernel-${KERNEL_VERSION}
# kernel-image becomes kernel-image-${KERNEL_VERISON}
PACKAGES = "kernel kernel-base kernel-vmlinux kernel-image kernel-dev kernel-modules"
FILES = ""
FILES_kernel-base = "/lib/modules/${KERNEL_VERSION}/modules.order /lib/modules/${KERNEL_VERSION}/modules.builtin"
FILES_kernel-image = "/boot/${KERNEL_IMAGETYPE}*"
FILES_kernel-dev = "/boot/System.map* /boot/Module.symvers* /boot/config* ${KERNEL_SRC_PATH}"
FILES_kernel-vmlinux = "/boot/vmlinux*"
FILES_kernel-modules = ""
RDEPENDS_kernel = "kernel-base"
# Allow machines to override this dependency if kernel image files are 
# not wanted in images as standard
RDEPENDS_kernel-base ?= "kernel-image"
PKG_kernel-image = "kernel-image-${@legitimize_package_name('${KERNEL_VERSION}')}"
PKG_kernel-base = "kernel-${@legitimize_package_name('${KERNEL_VERSION}')}"
RPROVIDES_kernel-base += "kernel-${KERNEL_VERSION}"
ALLOW_EMPTY_kernel = "1"
ALLOW_EMPTY_kernel-base = "1"
ALLOW_EMPTY_kernel-image = "1"
ALLOW_EMPTY_kernel-modules = "1"
DESCRIPTION_kernel-modules = "Kernel modules meta package"

pkg_postinst_kernel-image () {
if [ ! -e "$D/lib/modules/${KERNEL_VERSION}" ]; then
	mkdir -p $D/lib/modules/${KERNEL_VERSION}
fi
if [ -n "$D" ]; then
	depmodwrapper -a -b $D ${KERNEL_VERSION}
else
	depmod -a ${KERNEL_VERSION}
fi
}

PACKAGESPLITFUNCS_prepend = "split_kernel_packages "

python split_kernel_packages () {
    do_split_packages(d, root='/lib/firmware', file_regex='^(.*)\.bin$', output_pattern='kernel-firmware-%s', description='Firmware for %s', recursive=True, extra_depends='')
    do_split_packages(d, root='/lib/firmware', file_regex='^(.*)\.fw$', output_pattern='kernel-firmware-%s', description='Firmware for %s', recursive=True, extra_depends='')
    do_split_packages(d, root='/lib/firmware', file_regex='^(.*)\.cis$', output_pattern='kernel-firmware-%s', description='Firmware for %s', recursive=True, extra_depends='')
}

do_strip() {
	if [ -n "${KERNEL_IMAGE_STRIP_EXTRA_SECTIONS}" ]; then
		if [[ "${KERNEL_IMAGETYPE}" != "vmlinux" ]]; then
			bbwarn "image type will not be stripped (not supported): ${KERNEL_IMAGETYPE}"
			return
		fi

		cd ${B}
		headers=`"$CROSS_COMPILE"readelf -S ${KERNEL_OUTPUT} | \
			  grep "^ \{1,\}\[[0-9 ]\{1,\}\] [^ ]" | \
			  sed "s/^ \{1,\}\[[0-9 ]\{1,\}\] //" | \
			  gawk '{print $1}'`

		for str in ${KERNEL_IMAGE_STRIP_EXTRA_SECTIONS}; do {
			if [[ "$headers" != *"$str"* ]]; then
				bbwarn "Section not found: $str";
			fi

			"$CROSS_COMPILE"strip -s -R $str ${KERNEL_OUTPUT}
		}; done

		bbnote "KERNEL_IMAGE_STRIP_EXTRA_SECTIONS is set, stripping sections:" \
			"${KERNEL_IMAGE_STRIP_EXTRA_SECTIONS}"
	fi;
}
do_strip[dirs] = "${B}"

addtask do_strip before do_sizecheck after do_kernel_link_vmlinux

# 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
		cd ${B}
		size=`ls -lL ${KERNEL_OUTPUT} | awk '{ print $5}'`
		if [ $size -ge ${KERNEL_IMAGE_MAXSIZE} ]; then
			die "This kernel (size=$size > ${KERNEL_IMAGE_MAXSIZE}) is too big for your device. Please reduce the size of the kernel by making more of it modular."
		fi
	fi
}
do_sizecheck[dirs] = "${B}"

addtask sizecheck before do_install after do_strip

KERNEL_IMAGE_BASE_NAME ?= "${KERNEL_IMAGETYPE}-${PE}-${PV}-${PR}-${MACHINE}-${DATETIME}"
# Don't include the DATETIME variable in the sstate package signatures
KERNEL_IMAGE_BASE_NAME[vardepsexclude] = "DATETIME"
KERNEL_IMAGE_SYMLINK_NAME ?= "${KERNEL_IMAGETYPE}-${MACHINE}"
MODULE_IMAGE_BASE_NAME ?= "modules-${PE}-${PV}-${PR}-${MACHINE}-${DATETIME}"
MODULE_IMAGE_BASE_NAME[vardepsexclude] = "DATETIME"
MODULE_TARBALL_BASE_NAME ?= "${MODULE_IMAGE_BASE_NAME}.tgz"
# Don't include the DATETIME variable in the sstate package signatures
MODULE_TARBALL_SYMLINK_NAME ?= "modules-${MACHINE}.tgz"
MODULE_TARBALL_DEPLOY ?= "1"

do_uboot_mkimage() {
	if test "x${KERNEL_IMAGETYPE}" = "xuImage" ; then 
		if test "x${KEEPUIMAGE}" != "xyes" ; then
			ENTRYPOINT=${UBOOT_ENTRYPOINT}
			if test -n "${UBOOT_ENTRYSYMBOL}"; then
				ENTRYPOINT=`${HOST_PREFIX}nm ${S}/vmlinux | \
					awk '$3=="${UBOOT_ENTRYSYMBOL}" {print $1}'`
			fi
			if test -e arch/${ARCH}/boot/compressed/vmlinux ; then
				${OBJCOPY} -O binary -R .note -R .comment -S arch/${ARCH}/boot/compressed/vmlinux linux.bin
				uboot-mkimage -A ${UBOOT_ARCH} -O linux -T kernel -C none -a ${UBOOT_LOADADDRESS} -e $ENTRYPOINT -n "${DISTRO_NAME}/${PV}/${MACHINE}" -d linux.bin arch/${ARCH}/boot/uImage
				rm -f linux.bin
			else
				${OBJCOPY} -O binary -R .note -R .comment -S vmlinux linux.bin
				rm -f linux.bin.gz
				gzip -9 linux.bin
				uboot-mkimage -A ${UBOOT_ARCH} -O linux -T kernel -C gzip -a ${UBOOT_LOADADDRESS} -e $ENTRYPOINT -n "${DISTRO_NAME}/${PV}/${MACHINE}" -d linux.bin.gz arch/${ARCH}/boot/uImage
				rm -f linux.bin.gz
			fi
		fi
	fi
}

addtask uboot_mkimage before do_install after do_compile

kernel_do_deploy() {
	install -m 0644 ${KERNEL_OUTPUT} ${DEPLOYDIR}/${KERNEL_IMAGE_BASE_NAME}.bin
	if [ ${MODULE_TARBALL_DEPLOY} = "1" ] && (grep -q -i -e '^CONFIG_MODULES=y$' .config); then
		tar -cvzf ${DEPLOYDIR}/${MODULE_TARBALL_BASE_NAME} -C ${D} lib
		ln -sf ${MODULE_TARBALL_BASE_NAME}.bin ${MODULE_TARBALL_SYMLINK_NAME}
	fi

	cd ${DEPLOYDIR}
	rm -f ${KERNEL_IMAGE_SYMLINK_NAME}.bin
	ln -sf ${KERNEL_IMAGE_BASE_NAME}.bin ${KERNEL_IMAGE_SYMLINK_NAME}.bin
	ln -sf ${KERNEL_IMAGE_BASE_NAME}.bin ${KERNEL_IMAGETYPE}

	cp ${COREBASE}/meta/files/deploydir_readme.txt ${DEPLOYDIR}/README_-_DO_NOT_DELETE_FILES_IN_THIS_DIRECTORY.txt
	cd -
}
do_deploy[dirs] = "${DEPLOYDIR} ${B}"

addtask deploy before do_build after do_install

EXPORT_FUNCTIONS do_deploy