• Simon Glass's avatar
    Add core support for a bloblist to convey data from SPL · 9f407d4e
    Simon Glass authored
    At present there is no standard way in U-Boot to pass information from SPL
    to U-Boot proper. But sometimes SPL wants to convey information to U-Boot
    that U-Boot cannot easily figure out. For example, if SPL sets up SDRAM
    then it might want to pass the size of SDRAM, or the location of each
    bank, to U-Boot proper.
    Add a new 'bloblist' feature which provides this. A bloblist is set up in
    the first phase of U-Boot that runs (i.e. TPL or SPL). The location of
    this info may be in SRAM or CAR (x86 cache-as-RAM) or somewhere else.
    Information placed in this region is preserved (with a checksum) through
    TPL and SPL and ends up in U-Boot. At this point it is copied into SDRAM
    so it can be used after relocation.
    Reviewed-by: default avatarTom Rini <trini@konsulko.com>
    Signed-off-by: default avatarSimon Glass <sjg@chromium.org>
    Acked-by: default avatarAndreas Dannenberg <dannenberg@ti.com>