diff options
| -rw-r--r-- | linux/Config.in | 33 | ||||
| -rw-r--r-- | linux/linux.mk | 37 |
2 files changed, 69 insertions, 1 deletions
diff --git a/linux/Config.in b/linux/Config.in index 84fae910e..553aa3973 100644 --- a/linux/Config.in +++ b/linux/Config.in @@ -140,6 +140,13 @@ config BR2_LINUX_KERNEL_UIMAGE depends on BR2_arm || BR2_armeb || BR2_bfin || BR2_powerpc || BR2_avr32 || BR2_sh || BR2_sh64 select BR2_LINUX_KERNEL_UBOOT_IMAGE +config BR2_LINUX_KERNEL_APPENDED_UIMAGE + bool "uImage with appended DT" + depends on BR2_arm || BR2_armeb + select BR2_LINUX_KERNEL_DTS_SUPPORT + select BR2_LINUX_KERNEL_APPENDED_DTB + select BR2_LINUX_KERNEL_UBOOT_IMAGE + config BR2_LINUX_KERNEL_BZIMAGE bool "bzImage" depends on BR2_i386 || BR2_x86_64 @@ -148,6 +155,12 @@ config BR2_LINUX_KERNEL_ZIMAGE bool "zImage" depends on BR2_arm || BR2_armeb || BR2_powerpc || BR2_sparc || BR2_sh || BR2_sh64 || BR2_xtensa +config BR2_LINUX_KERNEL_APPENDED_ZIMAGE + bool "zImage with appended DT" + depends on BR2_arm || BR2_armeb + select BR2_LINUX_KERNEL_DTS_SUPPORT + select BR2_LINUX_KERNEL_APPENDED_DTB + config BR2_LINUX_KERNEL_VMLINUX_BIN bool "vmlinux.bin" depends on BR2_mips || BR2_mipsel || BR2_sh || BR2_sh64 @@ -187,6 +200,26 @@ config BR2_LINUX_KERNEL_DTS_SUPPORT if BR2_LINUX_KERNEL_DTS_SUPPORT +# We have mainly three cases when it comes to device tree support: +# 1) We don't want any support at all. Then the ..DTS_SUPPORT +# variable won't be set +# 2) We want device tree support, so we need the user to enter +# the device tree name or the the path to the custom device +# he uses, but the kernel abstracts this from us and only +# build an image that looks like a regular kernel image. In +# this case, we only need to derive the kernel image name from +# the given device tree name, and all the rest is as usual +# 3) We want device tree support, but the kernel requires us to +# build the device tree blob separately. In this case, some +# more logic will be needed. +# The variable below address the second case, were you only want +# limited actions from buildroot. +config BR2_LINUX_KERNEL_DTB_IS_SELF_BUILT + bool + +config BR2_LINUX_KERNEL_APPENDED_DTB + bool + choice prompt "Device tree source" default BR2_LINUX_KERNEL_USE_INTREE_DTS diff --git a/linux/linux.mk b/linux/linux.mk index 844ce5529..d466228f2 100644 --- a/linux/linux.mk +++ b/linux/linux.mk @@ -58,6 +58,13 @@ else ifeq ($(BR2_LINUX_KERNEL_USE_CUSTOM_DTS),y) KERNEL_DTS_NAME = $(basename $(notdir $(BR2_LINUX_KERNEL_CUSTOM_DTS_PATH))) endif +ifeq ($(BR2_LINUX_KERNEL_APPENDED_DTB),y) +ifneq ($(words $(KERNEL_DTS_NAME)),1) +$(error Kernel with appended device tree needs exactly one DTS source.\ + Check BR2_LINUX_KERNEL_INTREE_DTS_NAME or BR2_LINUX_KERNEL_CUSTOM_DTS_PATH.) +endif +endif + ifeq ($(BR2_LINUX_KERNEL_IMAGE_TARGET_CUSTOM),y) LINUX_IMAGE_NAME=$(call qstrip,$(BR2_LINUX_KERNEL_IMAGE_TARGET_NAME)) else @@ -68,10 +75,14 @@ LINUX_IMAGE_NAME=vmImage else LINUX_IMAGE_NAME=uImage endif +else ifeq ($(BR2_LINUX_KERNEL_APPENDED_UIMAGE),y) +LINUX_IMAGE_NAME=uImage else ifeq ($(BR2_LINUX_KERNEL_BZIMAGE),y) LINUX_IMAGE_NAME=bzImage else ifeq ($(BR2_LINUX_KERNEL_ZIMAGE),y) LINUX_IMAGE_NAME=zImage +else ifeq ($(BR2_LINUX_KERNEL_APPENDED_ZIMAGE),y) +LINUX_IMAGE_NAME=zImage else ifeq ($(BR2_LINUX_KERNEL_VMLINUX_BIN),y) LINUX_IMAGE_NAME=vmlinux.bin else ifeq ($(BR2_LINUX_KERNEL_VMLINUX),y) @@ -81,6 +92,12 @@ LINUX_IMAGE_NAME=vmlinuz endif endif +ifeq ($(BR2_LINUX_KERNEL_APPENDED_DTB),y) +LINUX_IMAGE_TARGET=zImage +else +LINUX_IMAGE_TARGET=$(LINUX_IMAGE_NAME) +endif + # Compute the arch path, since i386 and x86_64 are in arch/x86 and not # in arch/$(KERNEL_ARCH). Even if the kernel creates symbolic links # for bzImage, arch/i386 and arch/x86_64 do not exist when copying the @@ -161,10 +178,13 @@ define LINUX_CONFIGURE_CMDS $(call KCONFIG_SET_OPT,CONFIG_UEVENT_HELPER_PATH,\"/sbin/mdev\",$(@D)/.config)) $(if $(BR2_PACKAGE_SYSTEMD), $(call KCONFIG_ENABLE_OPT,CONFIG_CGROUPS,$(@D)/.config)) + $(if $(BR2_LINUX_KERNEL_APPENDED_DTB), + $(call KCONFIG_ENABLE_OPT,CONFIG_ARM_APPENDED_DTB,$(@D)/.config)) yes '' | $(TARGET_MAKE_ENV) $(MAKE1) $(LINUX_MAKE_FLAGS) -C $(@D) oldconfig endef ifeq ($(BR2_LINUX_KERNEL_DTS_SUPPORT),y) +ifeq ($(BR2_LINUX_KERNEL_DTB_IS_SELF_BUILT),) define LINUX_BUILD_DTB $(TARGET_MAKE_ENV) $(MAKE) $(LINUX_MAKE_FLAGS) -C $(@D) $(KERNEL_DTS_NAME).dtb endef @@ -172,17 +192,32 @@ define LINUX_INSTALL_DTB cp $(KERNEL_ARCH_PATH)/boot/$(KERNEL_DTS_NAME).dtb $(BINARIES_DIR)/ endef endif +endif + +ifeq ($(BR2_LINUX_KERNEL_APPENDED_UIMAGE),y) +define LINUX_APPEND_DTB + cat $(KERNEL_ARCH_PATH)/boot/$(KERNEL_DTS_NAME).dtb >> $(KERNEL_ARCH_PATH)/boot/zImage + # We need to generate the uImage here after that so that the uImage is + # generated with the right image size. + $(TARGET_MAKE_ENV) $(MAKE) $(LINUX_MAKE_FLAGS) -C $(@D) uImage +endef +else ifeq ($(BR2_LINUX_KERNEL_APPENDED_ZIMAGE),y) +define LINUX_APPEND_DTB + cat $(KERNEL_ARCH_PATH)/boot/$(KERNEL_DTS_NAME).dtb >> $(KERNEL_ARCH_PATH)/boot/zImage +endef +endif # Compilation. We make sure the kernel gets rebuilt when the # configuration has changed. define LINUX_BUILD_CMDS $(if $(BR2_LINUX_KERNEL_USE_CUSTOM_DTS), cp $(BR2_LINUX_KERNEL_CUSTOM_DTS_PATH) $(KERNEL_ARCH_PATH)/boot/dts/) - $(TARGET_MAKE_ENV) $(MAKE) $(LINUX_MAKE_FLAGS) -C $(@D) $(LINUX_IMAGE_NAME) + $(TARGET_MAKE_ENV) $(MAKE) $(LINUX_MAKE_FLAGS) -C $(@D) $(LINUX_IMAGE_TARGET) @if grep -q "CONFIG_MODULES=y" $(@D)/.config; then \ $(TARGET_MAKE_ENV) $(MAKE) $(LINUX_MAKE_FLAGS) -C $(@D) modules ; \ fi $(LINUX_BUILD_DTB) + $(LINUX_APPEND_DTB) endef |