summaryrefslogtreecommitdiff
path: root/meta/classes/kernel.bbclass
blob: 91c260a1b9e76ca9e02a59f74fc805893fc18fd2 (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
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
inherit linux-kernel-base kernel-module-split

PROVIDES += "virtual/kernel"
DEPENDS += "virtual/${TARGET_PREFIX}binutils virtual/${TARGET_PREFIX}gcc kmod-native bc-native lzop-native"
PACKAGE_WRITE_DEPS += "depmodwrapper-cross virtual/update-alternatives-native"

do_deploy[depends] += "depmodwrapper-cross:do_populate_sysroot"

S = "${STAGING_KERNEL_DIR}"
B = "${WORKDIR}/build"
KBUILD_OUTPUT = "${B}"
OE_TERMINAL_EXPORTS += "KBUILD_OUTPUT"

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

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

# KERNEL_VERSION is extracted from source code. It is evaluated as
# None for the first parsing, since the code has not been fetched.
# After the code is fetched, it will be evaluated as real version
# number and cause kernel to be rebuilt. To avoid this, make
# KERNEL_VERSION_NAME and KERNEL_VERSION_PKG_NAME depend on
# LINUX_VERSION which is a constant.
KERNEL_VERSION_NAME = "${@d.getVar('KERNEL_VERSION') or ""}"
KERNEL_VERSION_NAME[vardepvalue] = "${LINUX_VERSION}"
KERNEL_VERSION_PKG_NAME = "${@legitimize_package_name(d.getVar('KERNEL_VERSION'))}"
KERNEL_VERSION_PKG_NAME[vardepvalue] = "${LINUX_VERSION}"

python __anonymous () {
    import re

    # Merge KERNEL_IMAGETYPE and KERNEL_ALT_IMAGETYPE into KERNEL_IMAGETYPES
    type = d.getVar('KERNEL_IMAGETYPE') or ""
    alttype = d.getVar('KERNEL_ALT_IMAGETYPE') or ""
    types = d.getVar('KERNEL_IMAGETYPES') or ""
    if type not in types.split():
        types = (type + ' ' + types).strip()
    if alttype not in types.split():
        types = (alttype + ' ' + types).strip()
    d.setVar('KERNEL_IMAGETYPES', types)

    typeformake = re.sub(r'\.gz', '', types)
    d.setVar('KERNEL_IMAGETYPE_FOR_MAKE', typeformake)

    for type in types.split():
        typelower = type.lower()
        imagedest = d.getVar('KERNEL_IMAGEDEST')

        d.appendVar('PACKAGES', ' ' + 'kernel-image-' + typelower)

        d.setVar('FILES_kernel-image-' + typelower, '/' + imagedest + '/' + type + '-${KERNEL_VERSION_NAME}')

        d.appendVar('RDEPENDS_kernel-image', ' ' + 'kernel-image-' + typelower)

        d.setVar('PKG_kernel-image-' + typelower, 'kernel-image-' + typelower + '-${KERNEL_VERSION_PKG_NAME}')

        d.setVar('ALLOW_EMPTY_kernel-image-' + typelower, '1')

        priority = d.getVar('KERNEL_PRIORITY')
        postinst = '#!/bin/sh\n' + 'update-alternatives --install /' + imagedest + '/' + type + ' ' + type + ' ' + type + '-${KERNEL_VERSION_NAME} ' + priority + ' || true' + '\n'
        d.setVar('pkg_postinst_kernel-image-' + typelower, postinst)

        postrm = '#!/bin/sh\n' + 'update-alternatives --remove' + ' ' + type + ' ' + type + '-${KERNEL_VERSION_NAME} || true' + '\n'
        d.setVar('pkg_postrm_kernel-image-' + typelower, postrm)

    image = d.getVar('INITRAMFS_IMAGE')
    if image:
        d.appendVarFlag('do_bundle_initramfs', 'depends', ' ${INITRAMFS_IMAGE}:do_image_complete')

    # NOTE: setting INITRAMFS_TASK is for backward compatibility
    #       The preferred method is to set INITRAMFS_IMAGE, because
    #       this INITRAMFS_TASK has circular dependency problems
    #       if the initramfs requires kernel modules
    image_task = d.getVar('INITRAMFS_TASK')
    if image_task:
        d.appendVarFlag('do_configure', 'depends', ' ${INITRAMFS_TASK}')
}

# Here we pull in all various kernel image types which we support.
#
# In case you're wondering why kernel.bbclass inherits the other image
# types instead of the other way around, the reason for that is to
# maintain compatibility with various currently existing meta-layers.
# By pulling in the various kernel image types here, we retain the
# original behavior of kernel.bbclass, so no meta-layers should get
# broken.
#
# KERNEL_CLASSES by default pulls in kernel-uimage.bbclass, since this
# used to be the default behavior when only uImage was supported. This
# variable can be appended by users who implement support for new kernel
# image types.

KERNEL_CLASSES ?= " kernel-uimage "
inherit ${KERNEL_CLASSES}

# Old style kernels may set ${S} = ${WORKDIR}/git for example
# We need to move these over to STAGING_KERNEL_DIR. We can't just
# create the symlink in advance as the git fetcher can't cope with
# the symlink.
do_unpack[cleandirs] += " ${S} ${STAGING_KERNEL_DIR} ${B} ${STAGING_KERNEL_BUILDDIR}"
do_clean[cleandirs] += " ${S} ${STAGING_KERNEL_DIR} ${B} ${STAGING_KERNEL_BUILDDIR}"
base_do_unpack_append () {
    s = d.getVar("S")
    if s[-1] == '/':
        # drop trailing slash, so that os.symlink(kernsrc, s) doesn't use s as directory name and fail
        s=s[:-1]
    kernsrc = d.getVar("STAGING_KERNEL_DIR")
    if s != kernsrc:
        bb.utils.mkdirhier(kernsrc)
        bb.utils.remove(kernsrc, recurse=True)
        if d.getVar("EXTERNALSRC"):
            # With EXTERNALSRC S will not be wiped so we can symlink to it
            os.symlink(s, kernsrc)
        else:
            import shutil
            shutil.move(s, kernsrc)
            os.symlink(kernsrc, s)
}

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').split('-')[0].split('+')[0].split('.')[0]) * 10000 + \
                       int(d.getVar('PV').split('-')[0].split('+')[0].split('.')[1]) * 100 + \
                       int(d.getVar('PV').split('-')[0].split('+')[0].split('.')[-1])}"

KERNEL_RELEASE ?= "${KERNEL_VERSION}"

# The directory where built kernel lies in the kernel tree
KERNEL_OUTPUT_DIR ?= "arch/${ARCH}/boot"
KERNEL_IMAGEDEST = "boot"

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

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

KERNEL_LOCALVERSION ?= ""

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

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

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

EXTRA_OEMAKE = " HOSTCC="${BUILD_CC}" HOSTCPP="${BUILD_CPP}""
KERNEL_ALT_IMAGETYPE ??= ""

copy_initramfs() {
	echo "Copying initramfs into ./usr ..."
	# In case the directory is not created yet from the first pass compile:
	mkdir -p ${B}/usr
	# Find and use the first initramfs image archive type we find
	rm -f ${B}/usr/${INITRAMFS_IMAGE}-${MACHINE}.cpio
	for img in cpio cpio.gz cpio.lz4 cpio.lzo cpio.lzma cpio.xz; do
		if [ -e "${DEPLOY_DIR_IMAGE}/${INITRAMFS_IMAGE}-${MACHINE}.$img" ]; then
			cp ${DEPLOY_DIR_IMAGE}/${INITRAMFS_IMAGE}-${MACHINE}.$img ${B}/usr/.
			case $img in
			*gz)
				echo "gzip decompressing image"
				gunzip -f ${B}/usr/${INITRAMFS_IMAGE}-${MACHINE}.$img
				break
				;;
			*lz4)
				echo "lz4 decompressing image"
				lz4 -df ${B}/usr/${INITRAMFS_IMAGE}-${MACHINE}.$img
				break
				;;
			*lzo)
				echo "lzo decompressing image"
				lzop -df ${B}/usr/${INITRAMFS_IMAGE}-${MACHINE}.$img
				break
				;;
			*lzma)
				echo "lzma decompressing image"
				lzma -df ${B}/usr/${INITRAMFS_IMAGE}-${MACHINE}.$img
				break
				;;
			*xz)
				echo "xz decompressing image"
				xz -df ${B}/usr/${INITRAMFS_IMAGE}-${MACHINE}.$img
				break
				;;
			esac
		fi
	done
	echo "Finished copy of initramfs into ./usr"
}

INITRAMFS_BASE_NAME ?= "initramfs-${PV}-${PR}-${MACHINE}-${DATETIME}"
INITRAMFS_BASE_NAME[vardepsexclude] = "DATETIME"
do_bundle_initramfs () {
	if [ ! -z "${INITRAMFS_IMAGE}" -a x"${INITRAMFS_IMAGE_BUNDLE}" = x1 ]; then
		echo "Creating a kernel image with a bundled initramfs..."
		copy_initramfs
		# Backing up kernel image relies on its type(regular file or symbolic link)
		tmp_path=""
		for type in ${KERNEL_IMAGETYPES} ; do
			if [ -h ${KERNEL_OUTPUT_DIR}/$type ] ; then
				linkpath=`readlink -n ${KERNEL_OUTPUT_DIR}/$type`
				realpath=`readlink -fn ${KERNEL_OUTPUT_DIR}/$type`
				mv -f $realpath $realpath.bak
				tmp_path=$tmp_path" "$type"#"$linkpath"#"$realpath
			elif [ -f ${KERNEL_OUTPUT_DIR}/$type ]; then
				mv -f ${KERNEL_OUTPUT_DIR}/$type ${KERNEL_OUTPUT_DIR}/$type.bak
				tmp_path=$tmp_path" "$type"##"
			fi
		done
		use_alternate_initrd=CONFIG_INITRAMFS_SOURCE=${B}/usr/${INITRAMFS_IMAGE}-${MACHINE}.cpio
		kernel_do_compile
		# Restoring kernel image
		for tp in $tmp_path ; do
			type=`echo $tp|cut -d "#" -f 1`
			linkpath=`echo $tp|cut -d "#" -f 2`
			realpath=`echo $tp|cut -d "#" -f 3`
			if [ -n "$realpath" ]; then
				mv -f $realpath $realpath.initramfs
				mv -f $realpath.bak $realpath
				ln -sf $linkpath.initramfs ${B}/${KERNEL_OUTPUT_DIR}/$type.initramfs
			else
				mv -f ${KERNEL_OUTPUT_DIR}/$type ${KERNEL_OUTPUT_DIR}/$type.initramfs
				mv -f ${KERNEL_OUTPUT_DIR}/$type.bak ${KERNEL_OUTPUT_DIR}/$type
			fi
		done
	fi
}
do_bundle_initramfs[dirs] = "${B}"

python do_devshell_prepend () {
    os.environ["LDFLAGS"] = ''
}

addtask bundle_initramfs after do_install before do_deploy

kernel_do_compile() {
	unset CFLAGS CPPFLAGS CXXFLAGS LDFLAGS MACHINE
	# The $use_alternate_initrd is only set from
	# do_bundle_initramfs() This variable is specifically for the
	# case where we are making a second pass at the kernel
	# compilation and we want to force the kernel build to use a
	# different initramfs image.  The way to do that in the kernel
	# is to specify:
	# make ...args... CONFIG_INITRAMFS_SOURCE=some_other_initramfs.cpio
	if [ "$use_alternate_initrd" = "" ] && [ "${INITRAMFS_TASK}" != "" ] ; then
		# The old style way of copying an prebuilt image and building it
		# is turned on via INTIRAMFS_TASK != ""
		copy_initramfs
		use_alternate_initrd=CONFIG_INITRAMFS_SOURCE=${B}/usr/${INITRAMFS_IMAGE}-${MACHINE}.cpio
	fi
	for typeformake in ${KERNEL_IMAGETYPE_FOR_MAKE} ; do
		oe_runmake ${typeformake} CC="${KERNEL_CC}" LD="${KERNEL_LD}" ${KERNEL_EXTRA_ARGS} $use_alternate_initrd
		for type in ${KERNEL_IMAGETYPES} ; do
			if test "${typeformake}.gz" = "${type}"; then
				mkdir -p "${KERNEL_OUTPUT_DIR}"
				gzip -9c < "${typeformake}" > "${KERNEL_OUTPUT_DIR}/${type}"
				break;
			fi
		done
	done
}

do_compile_kernelmodules() {
	unset CFLAGS CPPFLAGS CXXFLAGS LDFLAGS MACHINE
	if (grep -q -i -e '^CONFIG_MODULES=y$' ${B}/.config); then
		oe_runmake -C ${B} ${PARALLEL_MAKE} modules CC="${KERNEL_CC}" LD="${KERNEL_LD}" ${KERNEL_EXTRA_ARGS}

		# Module.symvers gets updated during the 
		# building of the kernel modules. We need to
		# update this in the shared workdir since some
		# external kernel modules has a dependency on
		# other kernel modules and will look at this
		# file to do symbol lookups
		cp ${B}/Module.symvers ${STAGING_KERNEL_BUILDDIR}/
	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$' .config); then
		oe_runmake DEPMOD=echo MODLIB=${D}${nonarch_base_libdir}/modules/${KERNEL_VERSION} INSTALL_FW_PATH=${D}${nonarch_base_libdir}/firmware modules_install
		rm "${D}${nonarch_base_libdir}/modules/${KERNEL_VERSION}/build"
		rm "${D}${nonarch_base_libdir}/modules/${KERNEL_VERSION}/source"
		# If the kernel/ directory is empty remove it to prevent QA issues
		rmdir --ignore-fail-on-non-empty "${D}${nonarch_base_libdir}/modules/${KERNEL_VERSION}/kernel"
	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
	for type in ${KERNEL_IMAGETYPES} ; do
		install -m 0644 ${KERNEL_OUTPUT_DIR}/${type} ${D}/${KERNEL_IMAGEDEST}/${type}-${KERNEL_VERSION}
	done
	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
}
do_install[prefuncs] += "package_get_auto_pr"

# Must be ran no earlier than after do_kernel_checkout or else Makefile won't be in ${S}/Makefile
do_kernel_version_sanity_check() {
	if [ "x${KERNEL_VERSION_SANITY_SKIP}" = "x1" ]; then
		exit 0
	fi

	# The Makefile determines the kernel version shown at runtime
	# Don't use KERNEL_VERSION because the headers it grabs the version from aren't generated until do_compile
	VERSION=$(grep "^VERSION =" ${S}/Makefile | sed s/.*=\ *//)
	PATCHLEVEL=$(grep "^PATCHLEVEL =" ${S}/Makefile | sed s/.*=\ *//)
	SUBLEVEL=$(grep "^SUBLEVEL =" ${S}/Makefile | sed s/.*=\ *//)
	EXTRAVERSION=$(grep "^EXTRAVERSION =" ${S}/Makefile | sed s/.*=\ *//)

	# Build a string for regex and a plain version string
	reg="^${VERSION}\.${PATCHLEVEL}"
	vers="${VERSION}.${PATCHLEVEL}"
	if [ -n "${SUBLEVEL}" ]; then
		# Ignoring a SUBLEVEL of zero is fine
		if [ "${SUBLEVEL}" = "0" ]; then
			reg="${reg}(\.${SUBLEVEL})?"
		else
			reg="${reg}\.${SUBLEVEL}"
			vers="${vers}.${SUBLEVEL}"
		fi
	fi
	vers="${vers}${EXTRAVERSION}"
	reg="${reg}${EXTRAVERSION}"

	if [ -z `echo ${PV} | grep -E "${reg}"` ]; then
		bbfatal "Package Version (${PV}) does not match of kernel being built (${vers}). Please update the PV variable to match the kernel source or set KERNEL_VERSION_SANITY_SKIP=\"1\" in your recipe."
	fi
	exit 0
}

addtask shared_workdir after do_compile before do_compile_kernelmodules
addtask shared_workdir_setscene

do_shared_workdir_setscene () {
	exit 1
}

emit_depmod_pkgdata() {
	# Stash data for depmod
	install -d ${PKGDESTWORK}/kernel-depmod/
	echo "${KERNEL_VERSION}" > ${PKGDESTWORK}/kernel-depmod/kernel-abiversion
	cp ${B}/System.map ${PKGDESTWORK}/kernel-depmod/System.map-${KERNEL_VERSION}
}

PACKAGEFUNCS += "emit_depmod_pkgdata"

do_shared_workdir () {
	cd ${B}

	kerneldir=${STAGING_KERNEL_BUILDDIR}
	install -d $kerneldir

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

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

	# Copy files required for module builds
	cp System.map $kerneldir/System.map-${KERNEL_VERSION}
	cp Module.symvers $kerneldir/
	cp .config $kerneldir/
	mkdir -p $kerneldir/include/config
	cp include/config/kernel.release $kerneldir/include/config/kernel.release
	if [ -e certs/signing_key.pem ]; then
		# The signing_key.* files are stored in the certs/ dir in
		# newer Linux kernels
		mkdir -p $kerneldir/certs
		cp certs/signing_key.* $kerneldir/certs/
	elif [ -e signing_key.priv ]; then
		cp signing_key.* $kerneldir/
	fi

	# We can also copy over all the generated files and avoid special cases
	# like version.h, but we've opted to keep this small until file creep starts
	# to happen
	if [ -e include/linux/version.h ]; then
		mkdir -p $kerneldir/include/linux
		cp include/linux/version.h $kerneldir/include/linux/version.h
	fi

	# 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
		mkdir -p $kerneldir/arch/powerpc/lib/
		cp arch/powerpc/lib/crtsavres.o $kerneldir/arch/powerpc/lib/crtsavres.o
	fi

	if [ -d include/generated ]; then
		mkdir -p $kerneldir/include/generated/
		cp -fR include/generated/* $kerneldir/include/generated/
	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
}

# We don't need to stage anything, not the modules/firmware since those would clash with linux-firmware
sysroot_stage_all () {
	:
}

KERNEL_CONFIG_COMMAND ?= "oe_runmake_call -C ${S} O=${B} oldnoconfig || yes '' | oe_runmake -C ${S} O=${B} oldconfig"

python check_oldest_kernel() {
    oldest_kernel = d.getVar('OLDEST_KERNEL')
    kernel_version = d.getVar('KERNEL_VERSION')
    tclibc = d.getVar('TCLIBC')
    if tclibc == 'glibc':
        kernel_version = kernel_version.split('-', 1)[0]
        if oldest_kernel and kernel_version:
            if bb.utils.vercmp_string(kernel_version, oldest_kernel) < 0:
                bb.warn('%s: OLDEST_KERNEL is "%s" but the version of the kernel you are building is "%s" - therefore %s as built may not be compatible with this kernel. Either set OLDEST_KERNEL to an older version, or build a newer kernel.' % (d.getVar('PN'), oldest_kernel, kernel_version, tclibc))
}

check_oldest_kernel[vardepsexclude] += "OLDEST_KERNEL KERNEL_VERSION"
do_configure[prefuncs] += "check_oldest_kernel"

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

	if [ "${S}" != "${B}" ] && [ -f "${S}/.config" ] && [ ! -f "${B}/.config" ]; then
		mv "${S}/.config" "${B}/.config"
	fi

	# 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

	${KERNEL_CONFIG_COMMAND}
}

do_savedefconfig() {
	bbplain "Saving defconfig to:\n${B}/defconfig"
	oe_runmake -C ${B} savedefconfig
}
do_savedefconfig[nostamp] = "1"
addtask savedefconfig after do_configure

inherit cml1

EXPORT_FUNCTIONS do_compile do_install do_configure

# kernel-base becomes kernel-${KERNEL_VERSION}
# kernel-image becomes kernel-image-${KERNEL_VERSION}
PACKAGES = "kernel kernel-base kernel-vmlinux kernel-image kernel-dev kernel-modules"
FILES_${PN} = ""
FILES_kernel-base = "${nonarch_base_libdir}/modules/${KERNEL_VERSION}/modules.order ${nonarch_base_libdir}/modules/${KERNEL_VERSION}/modules.builtin"
FILES_kernel-image = ""
FILES_kernel-dev = "/boot/System.map* /boot/Module.symvers* /boot/config* ${KERNEL_SRC_PATH} ${nonarch_base_libdir}/modules/${KERNEL_VERSION}/build"
FILES_kernel-vmlinux = "/boot/vmlinux-${KERNEL_VERSION_NAME}"
FILES_kernel-modules = ""
RDEPENDS_kernel = "kernel-base"
# Allow machines to override this dependency if kernel image files are
# not wanted in images as standard
RDEPENDS_kernel-base ?= "kernel-image"
PKG_kernel-image = "kernel-image-${@legitimize_package_name('${KERNEL_VERSION}')}"
RDEPENDS_kernel-image += "${@base_conditional('KERNEL_IMAGETYPE', 'vmlinux', 'kernel-vmlinux', '', d)}"
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-base () {
	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='${nonarch_base_libdir}/firmware', file_regex='^(.*)\.(bin|fw|cis|csp|dsp)$', output_pattern='kernel-firmware-%s', description='Firmware for %s', recursive=True, extra_depends='')
}

# Many scripts want to look in arch/$arch/boot for the bootable
# image. This poses a problem for vmlinux and vmlinuz based
# booting. This task arranges to have vmlinux and vmlinuz appear
# in the normalized directory location.
do_kernel_link_images() {
	if [ ! -d "${B}/arch/${ARCH}/boot" ]; then
		mkdir ${B}/arch/${ARCH}/boot
	fi
	cd ${B}/arch/${ARCH}/boot
	ln -sf ../../../vmlinux
	if [ -f ../../../vmlinuz ]; then
		ln -sf ../../../vmlinuz
	fi
	if [ -f ../../../vmlinuz.bin ]; then
		ln -sf ../../../vmlinuz.bin
	fi
}

do_strip() {
	if [ -n "${KERNEL_IMAGE_STRIP_EXTRA_SECTIONS}" ]; then
		if ! (echo "${KERNEL_IMAGETYPES}" | grep -wq "vmlinux"); then
			bbwarn "image type(s) will not be stripped (not supported): ${KERNEL_IMAGETYPES}"
			return
		fi

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

		for str in ${KERNEL_IMAGE_STRIP_EXTRA_SECTIONS}; do {
			if ! (echo "$headers" | grep -q "^$str$"); then
				bbwarn "Section not found: $str";
			fi

			"$CROSS_COMPILE"strip -s -R $str ${KERNEL_OUTPUT_DIR}/vmlinux
		}; done

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

addtask strip before do_sizecheck after do_kernel_link_images

# 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
		invalid=`echo ${KERNEL_IMAGE_MAXSIZE} | sed 's/[0-9]//g'`
		if [ -n "$invalid" ]; then
			die "Invalid KERNEL_IMAGE_MAXSIZE: ${KERNEL_IMAGE_MAXSIZE}, should be an integerx (The unit is Kbytes)"
		fi
		for type in ${KERNEL_IMAGETYPES} ; do
			size=`du -ks ${B}/${KERNEL_OUTPUT_DIR}/$type | awk '{print $1}'`
			if [ $size -ge ${KERNEL_IMAGE_MAXSIZE} ]; then
				warn "This kernel $type (size=$size(K) > ${KERNEL_IMAGE_MAXSIZE}(K)) is too big for your device. Please reduce the size of the kernel by making more of it modular."
			fi
		done
	fi
}
do_sizecheck[dirs] = "${B}"

addtask sizecheck before do_install after do_strip

KERNEL_IMAGE_BASE_NAME ?= "${PKGE}-${PKGV}-${PKGR}-${MACHINE}-${DATETIME}"
# Don't include the DATETIME variable in the sstate package signatures
KERNEL_IMAGE_BASE_NAME[vardepsexclude] = "DATETIME"
KERNEL_IMAGE_SYMLINK_NAME ?= "${MACHINE}"
MODULE_IMAGE_BASE_NAME ?= "modules-${PKGE}-${PKGV}-${PKGR}-${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"

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

	for type in ${KERNEL_IMAGETYPES} ; do
		base_name=${type}-${KERNEL_IMAGE_BASE_NAME}
		symlink_name=${type}-${KERNEL_IMAGE_SYMLINK_NAME}
		ln -sf ${base_name}.bin ${DEPLOYDIR}/${symlink_name}.bin
		ln -sf ${base_name}.bin ${DEPLOYDIR}/${type}
	done

	cd ${B}
	# Update deploy directory
	for type in ${KERNEL_IMAGETYPES} ; do
		if [ -e "${KERNEL_OUTPUT_DIR}/${type}.initramfs" ]; then
			echo "Copying deploy ${type} kernel-initramfs image and setting up links..."
			initramfs_base_name=${type}-${INITRAMFS_BASE_NAME}
			initramfs_symlink_name=${type}-initramfs-${MACHINE}
			install -m 0644 ${KERNEL_OUTPUT_DIR}/${type}.initramfs ${DEPLOYDIR}/${initramfs_base_name}.bin
			ln -sf ${initramfs_base_name}.bin ${DEPLOYDIR}/${initramfs_symlink_name}.bin
		fi
	done
}
do_deploy[cleandirs] = "${DEPLOYDIR}"
do_deploy[dirs] = "${DEPLOYDIR} ${B}"
do_deploy[prefuncs] += "package_get_auto_pr"

addtask deploy after do_populate_sysroot do_packagedata

EXPORT_FUNCTIONS do_deploy