Dear Stefano Babic,
On 19.11.2012 10:11, Stefano Babic wrote:
> Simple howto to add support to a board
> for booting the kernel from SPL ("Falcon" mode).
>
> Signed-off-by: Stefano Babic <sba...@denx.de>
despite a small change
Acked-by: Andreas Bießmann <andreas.de...@googlemail.com>
> ---
> Changes in v3:
> - parameter initrd_addr was removed in V2 (Andreas Biessmann)
> - added patch to fix help usage for spl export (Andreas Biessmann)
> - Added empty lines (Otavio Salvador)
> - add a more exhaustive description explaining that
> spl export does not save into media (Lukasz Majewski).
>
> Changes in v2:
> - spelling, language fixes (Andreas Biessman)
> - rewrite some unclear sentences
> - drop CONFIG_SPL_OS_BOOT_KEY
> - make example with twister more exhaustive
>
<snip>
> +Configuration
> +----------------------------
> +CONFIG_CMD_SPL Enable the "spl export" command.
> + The command "spl export" is then available in U-Boot
> + mode
> +CONFIG_SPL_OS_BOOT Activate Falcon Mode.
> + A board should implement the following functions:
> +
> +CONFIG_SYS_SPL_ARGS_ADDR Address in RAM where the parameters must be
> + copied by SPL.
> + In most cases, it is <start_of_ram> + 0x100
> +
> +CONFIG_SYS_NAND_SPL_KERNEL_OFFS Offset in NAND where the kernel is
> stored
> +
> +CONFIG_CMD_SPL_NAND_OFS Offset in NAND where the parameters area was
> saved.
> +
> +CONFIG_CMD_SPL_WRITE_SIZE Size of the parameters area to be copied
> +
> +Function that a board must implement
> +------------------------------------
> +
> +void spl_board_prepare_for_linux(void) : optional
> + Called from SPL before starting the kernel
> +
> +spl_start_uboot() : required
> + Returns "0" if SPL starts the kernel, "1" if U-Boot
> + must be started.
> +
> +
shouldn't we reorder that thing here (move CONFIG_SPL_OS_BOOT down to
the functions)?
Best regards
Andreas Bießmann
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