help
AT91Bootstrap is a first level bootloader for the Atmel AT91
devices. It integrates algorithms for:
- - Device initialization such as clock configuration, PIO settings...
+ - Device initialization such as clock configuration, PIO
+ settings...
- Peripheral drivers such as PIO, PMC or SDRAMC...
- - Physical media algorithm such as DataFlash, NandFlash, NOR Flash...
+ - Physical media algorithm such as DataFlash, NandFlash, NOR
+ Flash...
if BR2_TARGET_AT91BOOTSTRAP3
config BR2_TARGET_AT91BOOTSTRAP3_CUSTOM_GIT
bool "Custom Git repository"
help
- This option allows Buildroot to get the AT91 Bootstrap 3 source
- code from a Git repository.
+ This option allows Buildroot to get the AT91 Bootstrap 3
+ source code from a Git repository.
endchoice
config BR2_TARGET_UBOOT_BUILD_SYSTEM_LEGACY
bool "Legacy"
help
- Select this option if you use an old U-Boot (older than 2015.04),
- so that we use the old build system.
+ Select this option if you use an old U-Boot (older than
+ 2015.04), so that we use the old build system.
config BR2_TARGET_UBOOT_BUILD_SYSTEM_KCONFIG
bool "Kconfig"
help
- Select this option if you use a recent U-Boot version (2015.04 or
- newer), so that we use the Kconfig build system.
+ Select this option if you use a recent U-Boot version (2015.04
+ or newer), so that we use the Kconfig build system.
endchoice
string "U-Boot board name"
help
One of U-Boot supported boards to be built.
- This will be suffixed with _config to meet U-Boot standard naming.
- See boards.cfg in U-Boot source code for the list of available
- configurations.
+ This will be suffixed with _config to meet U-Boot standard
+ naming. See boards.cfg in U-Boot source code for the list of
+ available configurations.
endif
choice
default BR2_TARGET_UBOOT_CUSTOM_GIT_VERSION \
if BR2_TARGET_UBOOT_CUSTOM_GIT_VERSION != "" # legacy
help
- Revision to use in the typical format used by Git/Mercurial/Subversion
- E.G. a sha id, a tag, branch, ..
+ Revision to use in the typical format used by
+ Git/Mercurial/Subversion E.G. a sha id, a tag, branch, ..
endif
bool "u-boot.nand (Freescale i.MX28)"
depends on BR2_arm
help
- This is Freescale i.MX28 BootStream format (.sb), with a header
- for booting from a NAND flash.
+ This is Freescale i.MX28 BootStream format (.sb), with a
+ header for booting from a NAND flash.
U-boot includes an mxsboot tool to generate this format,
starting from 2011.12.
- There are two possibilities when preparing an image writable to
- NAND flash:
- 1) The NAND was not written at all yet or the BCB (Boot Control
- Blocks) is broken. In this case, the NAND image 'u-boot.nand'
- needs to written.
+ There are two possibilities when preparing an image writable
+ to NAND flash:
+ 1) The NAND was not written at all yet or the BCB (Boot
+ Control Blocks) is broken. In this case, the NAND image
+ 'u-boot.nand' needs to written.
2) The NAND flash was already written with a good BCB. This
applies after 'u-boot.nand' was correctly written. There is no
- need to write the BCB again. In this case, the bootloader can be
- upgraded by writing 'u-boot.sb'.
+ need to write the BCB again. In this case, the bootloader can
+ be upgraded by writing 'u-boot.sb'.
To satisfy both cases, the 'u-boot.nand' image obtained from
- mxsboot as well as the U-Boot make target 'u-boot.sb' are copied
- to the binaries directory.
+ mxsboot as well as the U-Boot make target 'u-boot.sb' are
+ copied to the binaries directory.
See doc/README.mxs (or doc/README.mx28_common before 2013.07)
depends on BR2_TARGET_UBOOT_FORMAT_CUSTOM
help
In case the U-Boot binary for the target platform is not among
- the default names, one or more custom names can be listed here.
+ the default names, one or more custom names can be listed
+ here.
Use space to separate multiple names.
Example:
u-boot_magic.bin