Hi Andreas, On 26 September 2018 at 21:54, Andreas Dannenberg <dannenb...@ti.com> wrote: > Hi Simon, > some quick comments/notes inlined... > > On Wed, Sep 26, 2018 at 03:55:01PM -0600, Simon Glass wrote: >> 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. >> > > Seems generally quite useful. For example on different TI platforms we > read out various board-specific information from an EEPROM in SPL (in > addition to DDR related stuff) which needs to be passed to U-Boot proper > and for that we have established the concept of a "scratch pad SRAM" > which essentially serves the same purpose but is very rudimentary for > example with no protection against corruption whereas the bloblists can > use CRC... very nice.
OK good. I was a bit unsure about whether CRC was worth it. But I can see cases where something might go wrong. Will take care of your comments, thanks. Regards, Simon _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de https://lists.denx.de/listinfo/u-boot
