On Sun, Apr 19, 2009 at 04:59:41PM -0500, Kumar Gala wrote: > > On Apr 19, 2009, at 2:48 PM, Robert Schwebel wrote: > >> On Sat, Apr 18, 2009 at 08:54:41PM +0200, Wolfgang Denk wrote: >>> u-boot-v2 is an interesting approach in several aspects, but since it >>> was made publicly visible nearly two years ago it did not collect >>> much >>> of a community around it. >> >> Right; part of the reason is it was always something we used to solve >> our problems, and we didn't do much marketing around it. Nevertheless, >> it *does* solve our problems very well, and each time we have to work >> with v1 again it's weaknesses show up again and again. > > What's the summary of features that v2 has that v1 doesnt?
- Kconfig support - Linux Build support - Clean device registration and driver matching, so there can always be multiple instances of a device - filesystem support. U-Boot starts by mounting a ramfs on /, populating a devfs under /dev and load the environemt to /env. Use the normal commands like cd, ls, rm, cat,... - mount: there is no mmc_ls and mmc_load and stuff like that. Just mount your device and use ls - The environment is not limited to a variable store, instead it's a ramfs which can store variables, scripts, splashimages or whatever - module support - One image for all storage types. Well, the hardware has to support it, but on i.MX27 the same image can start from RAM, Nor Flash and NAND Flash. - USB Network support - A network phy device layer, so phys are handled in a generic way. Their registers can be showed with md -s /dev/phy0 (and of course changed with mw) - A much simpler clock implementation (Linux clocksource). So basically what an architecture needs to do is to specify the timer resolution and provide a read_timer function which returns the raw timer value. - getopt support, so there is no need for positional arguments - A simple editor to edit scripts - readline usable on the command line to allow for interactive scripts - a sandbox port to run U-Boot on the host including tap ethernet - different bugs to hunt for Sascha -- Pengutronix e.K. | | Industrial Linux Solutions | http://www.pengutronix.de/ | Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 | _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
