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-rw-r--r--linux/linux.mk162
1 files changed, 162 insertions, 0 deletions
diff --git a/linux/linux.mk b/linux/linux.mk
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+###############################################################################
+#
+# Linux kernel 2.6 target
+#
+###############################################################################
+LINUX26_VERSION=$(call qstrip,$(BR2_LINUX_KERNEL_VERSION))
+
+# Compute LINUX26_SOURCE and LINUX26_SITE from the configuration
+ifeq ($(LINUX26_VERSION),custom)
+LINUX26_TARBALL:=$(call qstrip,$(BR2_LINUX_KERNEL_CUSTOM_TARBALL_LOCATION))
+LINUX26_SITE:=$(dir $(LINUX26_TARBALL))
+LINUX26_SOURCE:=$(notdir $(LINUX26_TARBALL))
+else
+LINUX26_SOURCE:=linux-$(LINUX26_VERSION).tar.bz2
+LINUX26_SITE:=$(BR2_KERNEL_MIRROR)/linux/kernel/v2.6/
+endif
+
+LINUX26_DIR:=$(BUILD_DIR)/linux-$(LINUX26_VERSION)
+LINUX26_PATCH=$(call qstrip,$(BR2_LINUX_KERNEL_PATCH))
+
+LINUX26_MAKE_FLAGS = \
+ HOSTCC="$(HOSTCC)" \
+ HOSTCFLAGS="$(HOSTCFLAGS)" \
+ ARCH=$(KERNEL_ARCH) \
+ INSTALL_MOD_PATH=$(TARGET_DIR) \
+ CROSS_COMPILE=$(TARGET_CROSS) \
+ LDFLAGS="$(TARGET_LDFLAGS)" \
+ LZMA="$(LZMA)"
+
+# Get the real Linux version, which tells us where kernel modules are
+# going to be installed in the target filesystem.
+LINUX26_VERSION_PROBED = $(shell $(MAKE) $(LINUX26_MAKE_FLAGS) -C $(LINUX26_DIR) --no-print-directory -s kernelrelease)
+
+ifeq ($(BR2_LINUX_KERNEL_UIMAGE),y)
+LINUX26_IMAGE_NAME=uImage
+LINUX26_DEPENDENCIES+=$(MKIMAGE)
+else ifeq ($(BR2_LINUX_KERNEL_BZIMAGE),y)
+LINUX26_IMAGE_NAME=bzImage
+else ifeq ($(BR2_LINUX_KERNEL_ZIMAGE),y)
+LINUX26_IMAGE_NAME=zImage
+else ifeq ($(BR2_LINUX_KERNEL_VMLINUX),y)
+LINUX26_IMAGE_NAME=vmlinux.bin
+endif
+
+LINUX26_IMAGE_PATH=$(LINUX26_DIR)/arch/$(KERNEL_ARCH)/boot/$(LINUX26_IMAGE_NAME)
+
+# Download
+$(LINUX26_DIR)/.stamp_downloaded:
+ @$(call MESSAGE,"Downloading kernel")
+ $(call DOWNLOAD,$(LINUX26_SITE),$(LINUX26_SOURCE))
+ifneq ($(filter ftp://% http://%,$(LINUX26_PATCH)),)
+ $(call DOWNLOAD,$(dir $(LINUX26_PATCH)),$(notdir $(LINUX26_PATCH)))
+endif
+ mkdir -p $(@D)
+ touch $@
+
+# Extraction
+$(LINUX26_DIR)/.stamp_extracted: $(LINUX26_DIR)/.stamp_downloaded
+ @$(call MESSAGE,"Extracting kernel")
+ mkdir -p $(@D)
+ $(Q)$(INFLATE$(suffix $(LINUX26_SOURCE))) $(DL_DIR)/$(LINUX26_SOURCE) | \
+ tar -C $(@D) $(TAR_STRIP_COMPONENTS)=1 $(TAR_OPTIONS) -
+ $(Q)touch $@
+
+# Patch
+$(LINUX26_DIR)/.stamp_patched: $(LINUX26_DIR)/.stamp_extracted
+ @$(call MESSAGE,"Patching kernel")
+ifneq ($(LINUX26_PATCH),)
+ifneq ($(filter ftp://% http://%,$(LINUX26_PATCH)),)
+ toolchain/patch-kernel.sh $(@D) $(DL_DIR) $(notdir $(LINUX26_PATCH))
+else ifeq ($(shell test -d $(LINUX26_PATCH) && echo "dir"),dir)
+ toolchain/patch-kernel.sh $(@D) $(LINUX26_PATCH) linux-\*.patch
+else
+ toolchain/patch-kernel.sh $(@D) $(dir $(LINUX26_PATCH)) $(notdir $(LINUX26_PATCH))
+endif
+endif
+ $(Q)touch $@
+
+
+# Configuration
+$(LINUX26_DIR)/.stamp_configured: $(LINUX26_DIR)/.stamp_patched
+ @$(call MESSAGE,"Configuring kernel")
+ifeq ($(BR2_LINUX_KERNEL_USE_DEFCONFIG),y)
+ $(TARGET_MAKE_ENV) $(MAKE1) $(LINUX26_MAKE_FLAGS) -C $(@D) $(call qstrip,$(BR2_LINUX_KERNEL_DEFCONFIG))_defconfig
+else ifeq ($(BR2_LINUX_KERNEL_USE_CUSTOM_CONFIG),y)
+ cp $(BR2_LINUX_KERNEL_CUSTOM_CONFIG_FILE) $(@D)/.config
+endif
+ifeq ($(BR2_ARM_EABI),y)
+ $(call KCONFIG_ENABLE_OPT,CONFIG_AEABI,$(@D)/.config)
+else
+ $(call KCONFIG_DISABLE_OPT,CONFIG_AEABI,$(@D)/.config)
+endif
+ifeq ($(BR2_INET_IPV6),y)
+ $(call KCONFIG_ENABLE_OPT,CONFIG_IPV6,$(@D)/.config)
+else
+ $(call KCONFIG_DISABLE_OPT,CONFIG_IPV6,$(@D)/.config)
+endif
+ifeq ($(BR2_TARGET_ROOTFS_INITRAMFS),y)
+ # As the kernel gets compiled before root filesystems are
+ # built, we create a fake initramfs file list. It'll be
+ # replaced later by the real list, and the kernel will be
+ # rebuilt using the linux26-rebuild-with-initramfs target.
+ touch $(BINARIES_DIR)/rootfs.initramfs
+ $(call KCONFIG_ENABLE_OPT,CONFIG_BLK_DEV_INITRD,$(@D)/.config)
+ $(call KCONFIG_SET_OPT,CONFIG_INITRAMFS_SOURCE,\"$(BINARIES_DIR)/rootfs.initramfs\",$(@D)/.config)
+ $(call KCONFIG_ENABLE_OPT,CONFIG_INITRAMFS_COMPRESSION_GZIP,$(@D)/.config)
+else
+ $(call KCONFIG_DISABLE_OPT,CONFIG_BLK_DEV_INITRD,$(@D)/.config)
+ $(call KCONFIG_SET_OPT,CONFIG_INITRAMFS_SOURCE,\"\",$(@D)/.config)
+endif
+ $(TARGET_MAKE_ENV) $(MAKE) $(LINUX26_MAKE_FLAGS) -C $(@D) oldconfig
+ $(Q)touch $@
+
+# Compilation. We make sure the kernel gets rebuilt when the
+# configuration has changed.
+$(LINUX26_DIR)/.stamp_compiled: $(LINUX26_DIR)/.stamp_configured $(LINUX26_DIR)/.config
+ @$(call MESSAGE,"Compiling kernel")
+ $(TARGET_MAKE_ENV) $(MAKE) $(LINUX26_MAKE_FLAGS) -C $(@D) $(LINUX26_IMAGE_NAME)
+ @if [ $(shell grep -c "CONFIG_MODULES=y" $(LINUX26_DIR)/.config) != 0 ] ; then \
+ $(TARGET_MAKE_ENV) $(MAKE) $(LINUX26_MAKE_FLAGS) -C $(@D) modules ; \
+ fi
+ $(Q)touch $@
+
+# Installation
+$(LINUX26_DIR)/.stamp_installed: $(LINUX26_DIR)/.stamp_compiled
+ @$(call MESSAGE,"Installing kernel")
+ cp $(LINUX26_IMAGE_PATH) $(BINARIES_DIR)
+ # Install modules and remove symbolic links pointing to build
+ # directories, not relevant on the target
+ @if [ $(shell grep -c "CONFIG_MODULES=y" $(LINUX26_DIR)/.config) != 0 ] ; then \
+ $(TARGET_MAKE_ENV) $(MAKE1) $(LINUX26_MAKE_FLAGS) -C $(@D) \
+ INSTALL_MOD_PATH=$(TARGET_DIR) modules_install ; \
+ rm -f $(TARGET_DIR)/lib/modules/$(LINUX26_VERSION_PROBED)/build ; \
+ rm -f $(TARGET_DIR)/lib/modules/$(LINUX26_VERSION_PROBED)/source ; \
+ fi
+ $(Q)touch $@
+
+linux26: host-module-init-tools $(LINUX26_DEPENDENCIES) $(LINUX26_DIR)/.stamp_installed
+
+linux26-menuconfig linux26-xconfig linux26-gconfig: $(LINUX26_DIR)/.stamp_configured
+ $(MAKE) $(LINUX26_MAKE_FLAGS) -C $(LINUX26_DIR) $(subst linux26-,,$@)
+
+# Support for rebuilding the kernel after the initramfs file list has
+# been generated in $(BINARIES_DIR)/rootfs.initramfs.
+$(LINUX26_DIR)/.stamp_initramfs_rebuilt: $(LINUX26_DIR)/.stamp_installed $(BINARIES_DIR)/rootfs.initramfs
+ @$(call MESSAGE,"Rebuilding kernel with initramfs")
+ # Remove the previously generated initramfs which was empty,
+ # to make sure the kernel will actually regenerate it.
+ $(RM) -f $(@D)/usr/initramfs_data.cpio.*
+ # Build the kernel.
+ $(TARGET_MAKE_ENV) $(MAKE) $(LINUX26_MAKE_FLAGS) -C $(@D) $(LINUX26_IMAGE_NAME)
+ # Copy the kernel image to its final destination
+ cp $(LINUX26_IMAGE_PATH) $(BINARIES_DIR)
+ $(Q)touch $@
+
+# The initramfs building code must make sure this target gets called
+# after it generated the initramfs list of files.
+linux26-rebuild-with-initramfs: $(LINUX26_DIR)/.stamp_initramfs_rebuilt
+
+ifeq ($(BR2_LINUX_KERNEL),y)
+TARGETS+=linux26
+endif