On Tue, Sep 14, 2010 at 10:51 PM, Stefan Roese <s...@denx.de> wrote: > Hi Aneesh, > > On Tuesday 14 September 2010 15:33:53 V, Aneesh wrote: >> > >> I wanted to know if there is a generic way to create two >> > >> binaries from the u-boot source both compiled for different >> > >> address ranges. The first initializes the RAM (may be >> > >> something else as well) and the second is the u-boot binary >> > >> responsible for loading OS etc. >> >> It's sheer coincidence that I also wanted to post a very similar query >> today. We have a similar requirement for OMAP platforms. >> >> Presently, we are maintaining a mini bootloader(called x-loader, based >> on u-boot)separately. We want to integrate x-loader with u-boot and >> up-stream the source code. > > That's definitely a good idea. > >> > > Take a look at the NAND_SPL infrastructure (nand_spl/*). It was >> > > created for >> > > platforms booting from NAND with tight restrictions (e.g. 4k image >> > > size for >> > > inital setup, mostly DDR). General idea here is that 2 images are >> > > created: >> > > a) Very small SPL (secondary program loader) image with only basic >> > > setup, like DDR and NAND >> > > >> > > b) RAM based U-Boot image >> > > >> > > Both images are combined in the build process creating a single >> > > image that can be flashed into NAND. >> > > >> > > doc/README.nand-boot-ppc440 might be interesting to get some more >> > > infos about this, some of it PPC4xx specific though. >> >> This looks promising. However, our SPL has to load u-boot from MMC. Is >> it OK to keep it under nand_spl directory or should we create >> something like 'mmc_spl'?
Good question, It created the mmc_ipl and use it for mmc booting e.g., eMMC boot. > > Not sure. Perhaps we should now really think about a more generic approach and > merge all this IPL/SPL stuff into a single directory. Perhaps something like > this: > > spl/ > spl/nand > spl/onenand > spl/mmc > spl/board Good, and use the CONFIG_PRELOADER as existing. but what's the SPL stand for? SPL (secondary program loader)? Thank you, Kyungmin Park > ... > > Comments welcome. > > Cheers, > Stefan > > -- > DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel > HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany > Phone: (+49)-8142-66989-0 Fax: (+49)-8142-66989-80 Email: off...@denx.de > _______________________________________________ > U-Boot mailing list > U-Boot@lists.denx.de > http://lists.denx.de/mailman/listinfo/u-boot > _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot