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'? 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 ... 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
