On 05/26/2016 01:46 PM, Paul Burton wrote: > On Thu, May 26, 2016 at 12:21:23AM +0200, Marek Vasut wrote: >> Not for SPL, which has 14 kiB size limit and it is itching to overflow. >> I am literally counting bytes in the SPL and removing slop from >> structures to make it fit, just barely. With the USB loader, I can >> brutalize the SPL into having extremely rudimentary UART support now >> (like printch() being the most advanced output mechanism, but you can >> only use it three times, otherwise the code won't fit and the board is >> eaten by demons) and this is where this patch comes into play. >> >> So yes, for full u-boot, this _should_ be part of DT. For SPL, please apply. > > Hi Marek,
Hi! > Interesting :) May I ask which platform/SoC you're working with? Have > you seen the (unfortunately currently out of tree) port we did for the > JZ4780-based Ci20? I recall the pain of squeezing SPL down to a small > enough size well... I bought the CI20, yeah. I started with that tree and am now getting it into mainline shape. I actually managed to optimize the SPL, so it does not overflow. One of the things which helped a lot was removing slop[1] from the structures and using appropriate data types in them (like don't use u32 to store an 8bit number). I also tinified the MMC stack, so that it won't pull in too much useless code. At this point, I have a u-boot running from SD card and the SD driver in full U-Boot is already probing from DT and using DM. I sent Daniel the updated patches, but they are still work in progress. Nonetheless, if you want me forward that to you as well, let me know. I plan to get this CI20 submitted at some point this or next week, so it can land in 2016.07 (I hope!) and then debian and fedora-mips (and other distros) can pick it up and package proper. That's how I see it. btw. what is the linux support status of the ci20 ? Is anyone working on that? I saw the DTS in Linux, but it's pretty bare-bones. btw2. can I get the ci40 anywhere or is that just unobtainium board ? > https://github.com/MIPS/CI20_u-boot > > Thanks, > Paul > [1] http://www.catb.org/esr/structure-packing/ -- Best regards, Marek Vasut _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
