kumquat-buildroot/boot/barebox/barebox-aux/Config.in

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barebox: support auxiliary config build Adds support to build barebox with an auxiliary config. This is useful for building an SPL (Secondary Program Loader) in addition to the traditional TPL (Tertiary Program Loader). The Beaglebone Black for example has two barebox configurations: - am335x_defconfig builds the full barebox bootloader with device tree - am335x_mlo_defconfig builds the smaller MLO bootloader that loads the full barebox bootloader from the eMMC or SD card. Tested with the following defconfig: # architecture BR2_arm=y BR2_cortex_a8=y BR2_ARM_EABIHF=y # system BR2_TARGET_GENERIC_HOSTNAME="beaglebone" BR2_ROOTFS_DEVICE_CREATION_DYNAMIC_DEVTMPFS=y BR2_TARGET_GENERIC_REMOUNT_ROOTFS_RW=y # filesystem BR2_PACKAGE_AM33X_CM3=y BR2_TARGET_ROOTFS_EXT2=y BR2_TARGET_ROOTFS_EXT2_4=y # bootloader BR2_TARGET_BAREBOX=y BR2_TARGET_BAREBOX_BOARD_DEFCONFIG="am335x" BR2_TARGET_BAREBOX_IMAGE_FILE="images/barebox-am33xx-beaglebone.img" BR2_TARGET_BAREBOX_CUSTOM_ENV=y BR2_TARGET_BAREBOX_CUSTOM_ENV_PATH="board/beaglebone/barebox/barebox.env" BR2_TARGET_BAREBOX_AUX=y BR2_TARGET_BAREBOX_AUX_BOARD_DEFCONFIG="am335x_mlo" BR2_TARGET_BAREBOX_AUX_IMAGE_FILE="images/barebox-am33xx-beaglebone-mlo.img" # kernel BR2_LINUX_KERNEL=y BR2_LINUX_KERNEL_USE_DEFCONFIG=y BR2_LINUX_KERNEL_DEFCONFIG="omap2plus" BR2_LINUX_KERNEL_ZIMAGE=y # use the barebox built-in dtb # BR2_LINUX_KERNEL_DTS_SUPPORT is not set Signed-off-by: Pieter Smith <pieter@boesman.nl> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
2016-04-24 23:15:24 +02:00
choice
prompt "Barebox configuration"
default BR2_TARGET_BAREBOX_AUX_USE_DEFCONFIG
config BR2_TARGET_BAREBOX_AUX_USE_DEFCONFIG
bool "Using a defconfig"
config BR2_TARGET_BAREBOX_AUX_USE_CUSTOM_CONFIG
bool "Using a custom config file"
endchoice
config BR2_TARGET_BAREBOX_AUX_BOARD_DEFCONFIG
string "board defconfig"
depends on BR2_TARGET_BAREBOX_AUX_USE_DEFCONFIG
help
Name of the board for which Barebox should be built, without
the _defconfig suffix.
config BR2_TARGET_BAREBOX_AUX_CUSTOM_CONFIG_FILE
string "Configuration file path"
depends on BR2_TARGET_BAREBOX_AUX_USE_CUSTOM_CONFIG
help
Path to the barebox configuration file
config BR2_TARGET_BAREBOX_AUX_CONFIG_FRAGMENT_FILES
string "Additional configuration fragment files"
help
A space-separated list of configuration fragment files,
that will be merged to the main Barebox configuration file.
config BR2_TARGET_BAREBOX_AUX_IMAGE_FILE
string "Image filename"
help
Name of the generated barebox image, which will be copied to
the images directory.
If left empty, defaults to:
- barebox.bin for barebox versions older than 2012.10.
- barebox-flash-image for later versions.
config BR2_TARGET_BAREBOX_AUX_CUSTOM_ENV
bool "Generate an environment image"
help
Generate a custom environment image. This environment will
contain the variables and scripts to be used at boot by
barebox.
config BR2_TARGET_BAREBOX_AUX_CUSTOM_ENV_PATH
string "Environment path"
depends on BR2_TARGET_BAREBOX_AUX_CUSTOM_ENV
help
Path to the directory containing the custom barebox
environment. Depending on your setup, it will probably be
based on either the content of the defaultenv or
defaultenv-2 directories in the barebox source code, plus
the additions needed. The output will be an image in the
barebox devfs format, stored in the images directory, with
the same name as the directory name given here.
config BR2_TARGET_BAREBOX_AUX_CUSTOM_EMBEDDED_ENV_PATH
string "Embedded environment path"
help
If this option is not empty, it is the path to a custom
embedded barebox environment. This image will be used when
the environment found in the environment sector is
invalid. This option sets the barebox Kconfig option
CONFIG_DEFAULT_ENVIRONMENT_PATH to the specified path. This
way it is possible to use Buildroot variables like
core: introduce per br2-external NAME This unique NAME is used to construct a per br2-external tree variable, BR2_EXTERNAL_$(NAME)_PATH, which contains the path to the br2-external tree. This variable is available both from Kconfig (set in the Kconfig snippet) and from the .mk files. Also, display the NAME and its path as a comment in the menuconfig. This will ultimately allow us to support multiple br2-external trees at once, with that NAME (and thus BR2_EXTERNAL_$(NAME)) uniquely defining which br2-external tree is being used. The obvious outcome is that BR2_EXTERNAL should now no longer be used to refer to the files in the br2-external tree; that location is now known from the BR2_EXTERNAL_$(NAME)_PATH variable instead. This means we no longer need to expose, and must stop from from exposing BR2_EXTERNAL as a Kconfig variable. Finally, this also fixes a latent bug in the pkg-generic infra, where we would so far always refer to BR2_EXTERNAL (even if not set) to filter the names of packages (to decide whether they are a bootloader, a toolchain or a simple package). Note: since the variables in the Makefile and in Kconfig are named the same, the one we computed early on in the Makefile will be overridden by the one in .config when we have it. Thus, even though they are set to the same raw value, the one from .config is quoted and, being included later in the Makefile, will take precedence, so we just re-include the generated Makefile fragment a third time before includeing the br2-external's Makefiles. That's unfortunate, but there is no easy way around that as we do want the two variables to be named the same in Makefile and Kconfig (and we can't ask the user to un-quote that variable himself either), hence this little dirty triple-inclusion trick. Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr> Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Cc: Arnout Vandecappelle <arnout@mind.be> Cc: Romain Naour <romain.naour@openwide.fr> Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
2016-10-14 16:39:17 +02:00
TOPDIR etc. to refer to the custom environment.
Depending on your setup, the custom embedded environment
will probably be based on either the content of the
defaultenv or defaultenv-2 directories in the barebox source
code.