368 lines
14 KiB
Makefile
368 lines
14 KiB
Makefile
################################################################################
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#
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# Linux kernel target
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#
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################################################################################
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LINUX_VERSION = $(call qstrip,$(BR2_LINUX_KERNEL_VERSION))
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LINUX_LICENSE = GPLv2
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LINUX_LICENSE_FILES = COPYING
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# Compute LINUX_SOURCE and LINUX_SITE from the configuration
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ifeq ($(BR2_LINUX_KERNEL_CUSTOM_TARBALL),y)
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LINUX_TARBALL = $(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_TARBALL_LOCATION))
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LINUX_SITE = $(patsubst %/,%,$(dir $(LINUX_TARBALL)))
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LINUX_SOURCE = $(notdir $(LINUX_TARBALL))
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else ifeq ($(BR2_LINUX_KERNEL_CUSTOM_LOCAL),y)
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LINUX_SITE = $(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_LOCAL_PATH))
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LINUX_SITE_METHOD = local
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else ifeq ($(BR2_LINUX_KERNEL_CUSTOM_GIT),y)
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LINUX_SITE = $(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_REPO_URL))
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LINUX_SITE_METHOD = git
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else ifeq ($(BR2_LINUX_KERNEL_CUSTOM_HG),y)
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LINUX_SITE = $(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_REPO_URL))
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LINUX_SITE_METHOD = hg
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else
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LINUX_SOURCE = linux-$(LINUX_VERSION).tar.xz
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# In X.Y.Z, get X and Y. We replace dots and dashes by spaces in order
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# to use the $(word) function. We support versions such as 3.1,
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# 2.6.32, 2.6.32-rc1, 3.0-rc6, etc.
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ifeq ($(findstring x2.6.,x$(LINUX_VERSION)),x2.6.)
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LINUX_SITE = $(BR2_KERNEL_MIRROR)/linux/kernel/v2.6
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else
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LINUX_SITE = $(BR2_KERNEL_MIRROR)/linux/kernel/v3.x
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endif
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# release candidates are in testing/ subdir
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ifneq ($(findstring -rc,$(LINUX_VERSION)),)
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LINUX_SITE := $(LINUX_SITE)/testing/
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endif # -rc
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endif
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LINUX_PATCHES = $(call qstrip,$(BR2_LINUX_KERNEL_PATCH))
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LINUX_INSTALL_IMAGES = YES
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LINUX_DEPENDENCIES += host-kmod host-lzop
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ifeq ($(BR2_LINUX_KERNEL_UBOOT_IMAGE),y)
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LINUX_DEPENDENCIES += host-uboot-tools
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endif
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LINUX_MAKE_FLAGS = \
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HOSTCC="$(HOSTCC)" \
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HOSTCFLAGS="$(HOSTCFLAGS)" \
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ARCH=$(KERNEL_ARCH) \
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INSTALL_MOD_PATH=$(TARGET_DIR) \
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CROSS_COMPILE="$(CCACHE) $(TARGET_CROSS)" \
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DEPMOD=$(HOST_DIR)/sbin/depmod
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# Get the real Linux version, which tells us where kernel modules are
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# going to be installed in the target filesystem.
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LINUX_VERSION_PROBED = $(shell $(MAKE) $(LINUX_MAKE_FLAGS) -C $(LINUX_DIR) --no-print-directory -s kernelrelease)
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ifeq ($(BR2_LINUX_KERNEL_USE_INTREE_DTS),y)
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KERNEL_DTS_NAME = $(call qstrip,$(BR2_LINUX_KERNEL_INTREE_DTS_NAME))
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else ifeq ($(BR2_LINUX_KERNEL_USE_CUSTOM_DTS),y)
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KERNEL_DTS_NAME = $(basename $(notdir $(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_DTS_PATH))))
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endif
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ifeq ($(BR2_LINUX_KERNEL_DTS_SUPPORT)$(KERNEL_DTS_NAME),y)
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$(error No kernel device tree source specified, check your \
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BR2_LINUX_KERNEL_USE_INTREE_DTS / BR2_LINUX_KERNEL_USE_CUSTOM_DTS settings)
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endif
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ifeq ($(BR2_LINUX_KERNEL_APPENDED_DTB),y)
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ifneq ($(words $(KERNEL_DTS_NAME)),1)
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$(error Kernel with appended device tree needs exactly one DTS source. \
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Check BR2_LINUX_KERNEL_INTREE_DTS_NAME or BR2_LINUX_KERNEL_CUSTOM_DTS_PATH.)
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endif
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endif
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KERNEL_DTBS = $(addsuffix .dtb,$(KERNEL_DTS_NAME))
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ifeq ($(BR2_LINUX_KERNEL_IMAGE_TARGET_CUSTOM),y)
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LINUX_IMAGE_NAME = $(call qstrip,$(BR2_LINUX_KERNEL_IMAGE_NAME))
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LINUX_TARGET_NAME = $(call qstrip,$(BR2_LINUX_KERNEL_IMAGE_TARGET_NAME))
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else
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ifeq ($(BR2_LINUX_KERNEL_UIMAGE),y)
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LINUX_IMAGE_NAME = uImage
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else ifeq ($(BR2_LINUX_KERNEL_APPENDED_UIMAGE),y)
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LINUX_IMAGE_NAME = uImage
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else ifeq ($(BR2_LINUX_KERNEL_BZIMAGE),y)
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LINUX_IMAGE_NAME = bzImage
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else ifeq ($(BR2_LINUX_KERNEL_ZIMAGE),y)
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LINUX_IMAGE_NAME = zImage
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else ifeq ($(BR2_LINUX_KERNEL_APPENDED_ZIMAGE),y)
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LINUX_IMAGE_NAME = zImage
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else ifeq ($(BR2_LINUX_KERNEL_CUIMAGE),y)
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LINUX_IMAGE_NAME = cuImage.$(KERNEL_DTS_NAME)
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else ifeq ($(BR2_LINUX_KERNEL_SIMPLEIMAGE),y)
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LINUX_IMAGE_NAME = simpleImage.$(KERNEL_DTS_NAME)
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else ifeq ($(BR2_LINUX_KERNEL_LINUX_BIN),y)
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LINUX_IMAGE_NAME = linux.bin
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else ifeq ($(BR2_LINUX_KERNEL_VMLINUX_BIN),y)
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LINUX_IMAGE_NAME = vmlinux.bin
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else ifeq ($(BR2_LINUX_KERNEL_VMLINUX),y)
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LINUX_IMAGE_NAME = vmlinux
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else ifeq ($(BR2_LINUX_KERNEL_VMLINUZ),y)
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LINUX_IMAGE_NAME = vmlinuz
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endif
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LINUX_TARGET_NAME = $(LINUX_IMAGE_NAME)
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endif
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ifeq ($(LINUX_IMAGE_NAME),)
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LINUX_IMAGE_NAME = $(LINUX_TARGET_NAME)
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endif
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LINUX_KERNEL_UIMAGE_LOADADDR = $(call qstrip,$(BR2_LINUX_KERNEL_UIMAGE_LOADADDR))
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ifneq ($(LINUX_KERNEL_UIMAGE_LOADADDR),)
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LINUX_MAKE_FLAGS += LOADADDR="$(LINUX_KERNEL_UIMAGE_LOADADDR)"
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endif
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# Compute the arch path, since i386 and x86_64 are in arch/x86 and not
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# in arch/$(KERNEL_ARCH). Even if the kernel creates symbolic links
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# for bzImage, arch/i386 and arch/x86_64 do not exist when copying the
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# defconfig file.
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ifeq ($(KERNEL_ARCH),i386)
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KERNEL_ARCH_PATH = $(LINUX_DIR)/arch/x86
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else ifeq ($(KERNEL_ARCH),x86_64)
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KERNEL_ARCH_PATH = $(LINUX_DIR)/arch/x86
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else
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KERNEL_ARCH_PATH = $(LINUX_DIR)/arch/$(KERNEL_ARCH)
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endif
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ifeq ($(BR2_LINUX_KERNEL_VMLINUX),y)
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LINUX_IMAGE_PATH = $(LINUX_DIR)/$(LINUX_IMAGE_NAME)
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else ifeq ($(BR2_LINUX_KERNEL_VMLINUZ),y)
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LINUX_IMAGE_PATH = $(LINUX_DIR)/$(LINUX_IMAGE_NAME)
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else
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ifeq ($(KERNEL_ARCH),avr32)
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LINUX_IMAGE_PATH = $(KERNEL_ARCH_PATH)/boot/images/$(LINUX_IMAGE_NAME)
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else
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LINUX_IMAGE_PATH = $(KERNEL_ARCH_PATH)/boot/$(LINUX_IMAGE_NAME)
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endif
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endif # BR2_LINUX_KERNEL_VMLINUX
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define LINUX_DOWNLOAD_PATCHES
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$(if $(LINUX_PATCHES),
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@$(call MESSAGE,"Download additional patches"))
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$(foreach patch,$(filter ftp://% http://%,$(LINUX_PATCHES)),\
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$(call DOWNLOAD,$(patch))$(sep))
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endef
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LINUX_POST_DOWNLOAD_HOOKS += LINUX_DOWNLOAD_PATCHES
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define LINUX_APPLY_PATCHES
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for p in $(LINUX_PATCHES) ; do \
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if echo $$p | grep -q -E "^ftp://|^http://" ; then \
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support/scripts/apply-patches.sh $(@D) $(DL_DIR) `basename $$p` ; \
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elif test -d $$p ; then \
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support/scripts/apply-patches.sh $(@D) $$p linux-\*.patch ; \
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else \
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support/scripts/apply-patches.sh $(@D) `dirname $$p` `basename $$p` ; \
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fi \
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done
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endef
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LINUX_POST_PATCH_HOOKS += LINUX_APPLY_PATCHES
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ifeq ($(BR2_LINUX_KERNEL_USE_DEFCONFIG),y)
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KERNEL_SOURCE_CONFIG = $(KERNEL_ARCH_PATH)/configs/$(call qstrip,$(BR2_LINUX_KERNEL_DEFCONFIG))_defconfig
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else ifeq ($(BR2_LINUX_KERNEL_USE_CUSTOM_CONFIG),y)
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KERNEL_SOURCE_CONFIG = $(BR2_LINUX_KERNEL_CUSTOM_CONFIG_FILE)
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endif
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define LINUX_CONFIGURE_CMDS
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$(INSTALL) -m 0644 $(KERNEL_SOURCE_CONFIG) $(KERNEL_ARCH_PATH)/configs/buildroot_defconfig
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$(TARGET_MAKE_ENV) $(MAKE1) $(LINUX_MAKE_FLAGS) -C $(@D) buildroot_defconfig
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rm $(KERNEL_ARCH_PATH)/configs/buildroot_defconfig
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$(if $(BR2_arm)$(BR2_armeb),
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$(call KCONFIG_ENABLE_OPT,CONFIG_AEABI,$(@D)/.config))
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$(if $(BR2_TARGET_ROOTFS_CPIO),
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$(call KCONFIG_ENABLE_OPT,CONFIG_BLK_DEV_INITRD,$(@D)/.config))
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# As the kernel gets compiled before root filesystems are
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# built, we create a fake cpio file. It'll be
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# replaced later by the real cpio archive, and the kernel will be
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# rebuilt using the linux-rebuild-with-initramfs target.
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$(if $(BR2_TARGET_ROOTFS_INITRAMFS),
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touch $(BINARIES_DIR)/rootfs.cpio
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$(call KCONFIG_SET_OPT,CONFIG_INITRAMFS_SOURCE,"$(BINARIES_DIR)/rootfs.cpio",$(@D)/.config)
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$(call KCONFIG_SET_OPT,CONFIG_INITRAMFS_ROOT_UID,0,$(@D)/.config)
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$(call KCONFIG_SET_OPT,CONFIG_INITRAMFS_ROOT_GID,0,$(@D)/.config))
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$(if $(BR2_ROOTFS_DEVICE_CREATION_STATIC),,
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$(call KCONFIG_ENABLE_OPT,CONFIG_DEVTMPFS,$(@D)/.config)
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$(call KCONFIG_ENABLE_OPT,CONFIG_DEVTMPFS_MOUNT,$(@D)/.config))
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$(if $(BR2_ROOTFS_DEVICE_CREATION_DYNAMIC_EUDEV),
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$(call KCONFIG_ENABLE_OPT,CONFIG_INOTIFY_USER,$(@D)/.config))
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$(if $(BR2_PACKAGE_KTAP),
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$(call KCONFIG_ENABLE_OPT,CONFIG_DEBUG_FS,$(@D)/.config)
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$(call KCONFIG_ENABLE_OPT,CONFIG_EVENT_TRACING,$(@D)/.config)
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$(call KCONFIG_ENABLE_OPT,CONFIG_PERF_EVENTS,$(@D)/.config)
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$(call KCONFIG_ENABLE_OPT,CONFIG_FUNCTION_TRACER,$(@D)/.config))
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$(if $(BR2_PACKAGE_SYSTEMD),
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$(call KCONFIG_ENABLE_OPT,CONFIG_CGROUPS,$(@D)/.config)
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$(call KCONFIG_ENABLE_OPT,CONFIG_INOTIFY_USER,$(@D)/.config)
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$(call KCONFIG_ENABLE_OPT,CONFIG_FHANDLE,$(@D)/.config)
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$(call KCONFIG_ENABLE_OPT,CONFIG_AUTOFS4_FS,$(@D)/.config)
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$(call KCONFIG_ENABLE_OPT,CONFIG_TMPFS_POSIX_ACL,$(@D)/.config)
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$(call KCONFIG_ENABLE_OPT,CONFIG_TMPFS_POSIX_XATTR,$(@D)/.config))
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$(if $(BR2_PACKAGE_SMACK),
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$(call KCONFIG_ENABLE_OPT,CONFIG_SECURITY,$(@D)/.config)
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$(call KCONFIG_ENABLE_OPT,CONFIG_SECURITY_SMACK,$(@D)/.config)
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$(call KCONFIG_ENABLE_OPT,CONFIG_SECURITY_NETWORK,$(@D)/.config))
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$(if $(BR2_LINUX_KERNEL_APPENDED_DTB),
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$(call KCONFIG_ENABLE_OPT,CONFIG_ARM_APPENDED_DTB,$(@D)/.config))
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yes '' | $(TARGET_MAKE_ENV) $(MAKE1) $(LINUX_MAKE_FLAGS) -C $(@D) oldconfig
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endef
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ifeq ($(BR2_LINUX_KERNEL_DTS_SUPPORT),y)
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ifeq ($(BR2_LINUX_KERNEL_DTB_IS_SELF_BUILT),)
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define LINUX_BUILD_DTB
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$(TARGET_MAKE_ENV) $(MAKE) $(LINUX_MAKE_FLAGS) -C $(@D) $(KERNEL_DTBS)
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endef
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define LINUX_INSTALL_DTB
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# dtbs moved from arch/<ARCH>/boot to arch/<ARCH>/boot/dts since 3.8-rc1
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cp $(addprefix \
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$(KERNEL_ARCH_PATH)/boot/$(if $(wildcard \
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$(addprefix $(KERNEL_ARCH_PATH)/boot/dts/,$(KERNEL_DTBS))),dts/),$(KERNEL_DTBS)) \
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$(BINARIES_DIR)/
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endef
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define LINUX_INSTALL_DTB_TARGET
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# dtbs moved from arch/<ARCH>/boot to arch/<ARCH>/boot/dts since 3.8-rc1
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cp $(addprefix \
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$(KERNEL_ARCH_PATH)/boot/$(if $(wildcard \
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$(addprefix $(KERNEL_ARCH_PATH)/boot/dts/,$(KERNEL_DTBS))),dts/),$(KERNEL_DTBS)) \
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$(TARGET_DIR)/boot/
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endef
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endif
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endif
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ifeq ($(BR2_LINUX_KERNEL_APPENDED_DTB),y)
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# dtbs moved from arch/$ARCH/boot to arch/$ARCH/boot/dts since 3.8-rc1
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define LINUX_APPEND_DTB
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if [ -e $(KERNEL_ARCH_PATH)/boot/$(KERNEL_DTS_NAME).dtb ]; then \
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cat $(KERNEL_ARCH_PATH)/boot/$(KERNEL_DTS_NAME).dtb; \
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else \
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cat $(KERNEL_ARCH_PATH)/boot/dts/$(KERNEL_DTS_NAME).dtb; \
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fi >> $(KERNEL_ARCH_PATH)/boot/zImage
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endef
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ifeq ($(BR2_LINUX_KERNEL_APPENDED_UIMAGE),y)
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# We need to generate a new u-boot image that takes into
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# account the extra-size added by the device tree at the end
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# of the image. To do so, we first need to retrieve both load
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# address and entry point for the kernel from the already
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# generate uboot image before using mkimage -l.
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LINUX_APPEND_DTB += $(sep) MKIMAGE_ARGS=`$(MKIMAGE) -l $(LINUX_IMAGE_PATH) |\
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sed -n -e 's/Image Name:[ ]*\(.*\)/-n \1/p' -e 's/Load Address:/-a/p' -e 's/Entry Point:/-e/p'`; \
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$(MKIMAGE) -A $(MKIMAGE_ARCH) -O linux \
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-T kernel -C none $${MKIMAGE_ARGS} \
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-d $(KERNEL_ARCH_PATH)/boot/zImage $(LINUX_IMAGE_PATH);
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endif
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endif
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# Compilation. We make sure the kernel gets rebuilt when the
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# configuration has changed.
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define LINUX_BUILD_CMDS
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$(if $(BR2_LINUX_KERNEL_USE_CUSTOM_DTS),
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cp $(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_DTS_PATH)) $(KERNEL_ARCH_PATH)/boot/dts/)
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$(TARGET_MAKE_ENV) $(MAKE) $(LINUX_MAKE_FLAGS) -C $(@D) $(LINUX_TARGET_NAME)
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@if grep -q "CONFIG_MODULES=y" $(@D)/.config; then \
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$(TARGET_MAKE_ENV) $(MAKE) $(LINUX_MAKE_FLAGS) -C $(@D) modules ; \
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fi
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$(LINUX_BUILD_DTB)
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$(LINUX_APPEND_DTB)
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endef
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ifeq ($(BR2_LINUX_KERNEL_INSTALL_TARGET),y)
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define LINUX_INSTALL_KERNEL_IMAGE_TO_TARGET
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install -m 0644 -D $(LINUX_IMAGE_PATH) $(TARGET_DIR)/boot/$(LINUX_IMAGE_NAME)
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$(LINUX_INSTALL_DTB_TARGET)
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endef
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endif
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define LINUX_INSTALL_HOST_TOOLS
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# Installing dtc (device tree compiler) as host tool, if selected
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if grep -q "CONFIG_DTC=y" $(@D)/.config; then \
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$(INSTALL) -D -m 0755 $(@D)/scripts/dtc/dtc $(HOST_DIR)/usr/bin/dtc ; \
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fi
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endef
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define LINUX_INSTALL_IMAGES_CMDS
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cp $(LINUX_IMAGE_PATH) $(BINARIES_DIR)
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$(LINUX_INSTALL_DTB)
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endef
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define LINUX_INSTALL_TARGET_CMDS
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$(LINUX_INSTALL_KERNEL_IMAGE_TO_TARGET)
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# Install modules and remove symbolic links pointing to build
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# directories, not relevant on the target
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@if grep -q "CONFIG_MODULES=y" $(@D)/.config; then \
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$(TARGET_MAKE_ENV) $(MAKE1) $(LINUX_MAKE_FLAGS) -C $(@D) modules_install; \
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rm -f $(TARGET_DIR)/lib/modules/$(LINUX_VERSION_PROBED)/build ; \
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rm -f $(TARGET_DIR)/lib/modules/$(LINUX_VERSION_PROBED)/source ; \
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fi
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$(LINUX_INSTALL_HOST_TOOLS)
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endef
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include $(sort $(wildcard linux/linux-ext-*.mk))
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$(eval $(generic-package))
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ifeq ($(BR2_LINUX_KERNEL),y)
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linux-menuconfig linux-xconfig linux-gconfig linux-nconfig: linux-configure
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$(MAKE) $(LINUX_MAKE_FLAGS) -C $(LINUX_DIR) \
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$(subst linux-,,$@)
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rm -f $(LINUX_DIR)/.stamp_{built,target_installed,images_installed}
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linux-savedefconfig: linux-configure
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$(MAKE) $(LINUX_MAKE_FLAGS) -C $(LINUX_DIR) \
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$(subst linux-,,$@)
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ifeq ($(BR2_LINUX_KERNEL_USE_CUSTOM_CONFIG),y)
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linux-update-config: linux-configure $(LINUX_DIR)/.config
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cp -f $(LINUX_DIR)/.config $(BR2_LINUX_KERNEL_CUSTOM_CONFIG_FILE)
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linux-update-defconfig: linux-savedefconfig
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cp -f $(LINUX_DIR)/defconfig $(BR2_LINUX_KERNEL_CUSTOM_CONFIG_FILE)
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else
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linux-update-config: ;
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linux-update-defconfig: ;
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endif
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endif
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# Support for rebuilding the kernel after the cpio archive has
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# been generated in $(BINARIES_DIR)/rootfs.cpio.
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$(LINUX_DIR)/.stamp_initramfs_rebuilt: $(LINUX_DIR)/.stamp_target_installed $(LINUX_DIR)/.stamp_images_installed $(BINARIES_DIR)/rootfs.cpio
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@$(call MESSAGE,"Rebuilding kernel with initramfs")
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# Build the kernel.
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$(TARGET_MAKE_ENV) $(MAKE) $(LINUX_MAKE_FLAGS) -C $(@D) $(LINUX_TARGET_NAME)
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$(LINUX_APPEND_DTB)
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# Copy the kernel image to its final destination
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cp $(LINUX_IMAGE_PATH) $(BINARIES_DIR)
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# If there is a .ub file copy it to the final destination
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test ! -f $(LINUX_IMAGE_PATH).ub || cp $(LINUX_IMAGE_PATH).ub $(BINARIES_DIR)
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$(Q)touch $@
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# The initramfs building code must make sure this target gets called
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# after it generated the initramfs list of files.
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linux-rebuild-with-initramfs: $(LINUX_DIR)/.stamp_initramfs_rebuilt
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# Checks to give errors that the user can understand
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ifeq ($(filter source,$(MAKECMDGOALS)),)
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ifeq ($(BR2_LINUX_KERNEL_USE_DEFCONFIG),y)
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ifeq ($(call qstrip,$(BR2_LINUX_KERNEL_DEFCONFIG)),)
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$(error No kernel defconfig name specified, check your BR2_LINUX_KERNEL_DEFCONFIG setting)
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endif
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endif
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ifeq ($(BR2_LINUX_KERNEL_USE_CUSTOM_CONFIG),y)
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ifeq ($(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_CONFIG_FILE)),)
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$(error No kernel configuration file specified, check your BR2_LINUX_KERNEL_CUSTOM_CONFIG_FILE setting)
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endif
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endif
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endif
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