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authorDennis Gilmore <dennis@ausil.us>2014-07-30 16:37:14 -0600
committerHans de Goede <hdegoede@redhat.com>2014-08-12 08:42:31 +0200
commit8cc96848f0a467922820895b6b2363b0c64163b5 (patch)
tree8a4524afb97da853657bd94622f6a069594595e0 /net
parent6ae66f2e892b61eda9199f5a3869b5c5c3f5544a (diff)
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config: introduce a generic $bootcmd
This generic $bootcmd, and associated support macros, automatically searches a defined set of storage devices (or network protocols) for an extlinux configuration file or U-Boot boot script in various standardized locations. Distros that install such a boot config file/script in those standard locations will get easy-to-set-up booting on HW that enables this generic $bootcmd. Boards can define the set of devices from which boot is attempted, and the order in which they are attempted. Users may later customize this set/order by edting $boot_targets. Users may interrupt the boot process and boot from a specific device simply by executing e.g.: $ run bootcmd_mmc1 or: $ run bootcmd_pxe This patch was originally written by Dennis Gilmore based on Tegra and rpi_b boot scripts. I have made the following modifications since then: * Boards must define the BOOT_TARGET_DEVICES macro in order to specify the set of devices (and order) from which to attempt boot. If needed, we can define a default directly in config_distro_bootcmd.h. * Removed $env_import and related variables; nothing used them, and I think it's better for boards to pre-load an environment customization file using CONFIG_PREBOOT if they need. * Renamed a bunch of variables to suit my whims:-) Signed-off-by: Dennis Gilmore <dennis@ausil.us> Signed-off-by: Stephen Warren <swarren@nvidia.com> Reviewed-by: Marek Vasut <marex@denx.de> Acked-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'net')
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