On 08/24/2012 09:15 PM, Tom Rini wrote: >>> I still would like to move to my suggestion to not copy the header and >>> use the mkimage header values ih_load and ih_ep directly. Right now I >>> don't see any showstopper for doing it this way. I'll send a patch to >>> change this shortly (if everything works out). >> >> Hmmm. As it seems some SPL loading drivers (block like mmc, streaming >> like ymodem) are not that easily converted to skipping the header. So >> I'm not so sure if we should go this way after all... > > Maybe I'm missing something, but maybe we just need to mimic the > behavior full U-Boot does and if we haven't been loaded where we need to > execute, shift bits around?
Of course its possible. The main problem is speed here. With the "problematic" drivers like mmc, you would need to copy the image a 2nd time, once from MMC to a temp. SDRAM location, and then to its final (load_addr) destination. With the current approach, the image is only copied once from MMC to SDRAM. The 2nd copy shouldn't take that long though. Its SDRAM to SDRAM after all. I really do like Daniel's approach, with the decompression support: http://dev.phrozen.org/gitweb/?p=uboot-upstream.git;a=commitdiff;h=39165fa145b2d959f1eaa6faa3ab3053823bb985 We should try to merge this into the current SPL framework. I'll try to look into this next week. Thanks, Stefan _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
