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Diffstat (limited to 'tools/binman')
| -rw-r--r-- | tools/binman/binman.rst | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/tools/binman/binman.rst b/tools/binman/binman.rst index b3df3a6..bc635aa 100644 --- a/tools/binman/binman.rst +++ b/tools/binman/binman.rst @@ -232,6 +232,30 @@ You can use other, more specific CONFIG options - see 'Automatic .dtsi inclusion' below. +Using binman with OF_BOARD or OF_PRIOR_STAGE +-------------------------------------------- + +Normally binman is used with a board configured with OF_SEPARATE or OF_EMBED. +This is a typical scenario where a device tree source that contains the binman +node is provided in the arch/<arch>/dts directory for a specific board. + +However for a board configured with OF_BOARD or OF_PRIOR_STAGE, no device tree +blob is provided in the U-Boot build phase hence the binman node information +is not available. In order to support such use case, a new Kconfig option +BINMAN_STANDALONE_FDT is introduced, to tell the build system that a standalone +device tree blob containing binman node is explicitly required. + +Note there is a Kconfig option BINMAN_FDT which enables U-Boot run time to +access information about binman entries, stored in the device tree in a binman +node. Generally speaking, this option makes sense for OF_SEPARATE or OF_EMBED. +For the other OF_CONTROL methods, it's quite possible binman node is not +available as binman is invoked during the build phase, thus this option is not +turned on by default for these OF_CONTROL methods. + +See qemu-riscv64_spl_defconfig for an example of how binman is used with +OF_PRIOR_STAGE to generate u-boot.itb image. + + Access to binman entry offsets at run time (symbols) ---------------------------------------------------- |