Hi Philip, On Friday, April 19, 2013 5:09:59 PM,Philip Paeps wrote: > On 2013-04-19 16:48:42 (+0200), Philip Paeps <phi...@paeps.cx> wrote: > > On 2013-04-19 15:00:13 (+0200), Philip Paeps <phi...@paeps.cx> wrote: > > > On 2013-04-19 06:10:51 (+0200), Marek Vasut <ma...@denx.de> wrote: > > > > To avoid the old function which are used with the nand_spl/ stuff > > > > getting in the way of NAND SPL framework, the macro > > > > CONFIG_SPL_NAND_LEGACY was introduced and two remaining legacy > > > > boards were adjusted. These board need to be either fixed or > > > > removed in the long run, but I don't have either. > > > > > > It sounds like "fixing" these boards is mainly a matter of confirming > > > that a configuration for them based around CONFIG_SPL_FRAMEWORK will fit > > > in 2K. If so, I don't think there is any reason to keep legacy support > > > around. > > > > A first build with CONFIG_SPL_FRAMEWORK came out to nearly 4K. Large > > contributors being (unsurprisingly) libcommon and libgeneric. I had to > > get rid of a puts() in libspl to make it build without those libraries. > > Unfortunately, that still came out to 2.2K. Close. :-) > > > > I couldn't identify any obvious 100 bytes to scrap from glancing at > > u-boot-spl.map or objdump -D u-boot-spl, but I'll take a look. > > Just as I hit 'send', it occurred to me that this configuration is with > a fairly lengthy lowlevel_init.S to support external boot. Paring that > to the bare minimum gives a u-boot-spl.bin of 1821 bytes.
But this requires a board-specific lowlevel_init() and a hack for puts() (which is perhaps already solved by Andreas' series), just to bloat the SPL with stuff useless for those boards, vs. a simple nand_boot() that can be made common to all SPLs with size restrictions. > I'm not familiar enough with 'internal boot' and the 'imximage' format > to judge whether this leaves enough margin for telling the ROM loader to > do its thing usefully. Benoît: do you have an idea how long a typically > useful imximage preamble gets? Is ~230 bytes sufficient margin? What do you mean? mx31pdk and tx25, contrary to m53evk, use external NAND boot, hence the 2-kiB SPL size limit (which could actually be extended to 4 kiB for tx25, but not for mx31pdk), and they don't require any imximage. Best regards, Benoît _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
