Hello Stefano
>>>> Stefano Babic <sba...@denx.de> 07.04.14 18.07 Uhr >>> >Hi Frank, > >On 07/04/2014 15:49, Frank Ihle wrote: >> Hi U-Boot, >> >> you recently gave me the hint about the Falcon Mode for my Fast >> Booting investigations. But I think might got it wrong, could >> somebody correct me if so?: >> >> - According to the "Falcon Mode" Pdf of October 2013 >> (http://www.denx.de/wiki/pub/U-Boot/MiniSummitELCE2013/2013-ELCE-U-Boot-Falcon-Boot.pdf) >> The Falcon mode is just about to chose 2 different execution modes >> during startup - one that starts Linux directly (and skips u-boot) >> and the other for instance to make updates, or failsafe mode (and >> starts u-boot). Or does it even contain more functionality ? > >The second starts U-Boot as you are used to. agreed >> - According to the "Minimizing boot times using U-Boot Falcon Mode" >> Pdf of July 2012 >> (http://schedule2012.rmll.info/IMG/pdf/LSM2012_UbootFalconMode_Babic.pdf) >> it's mentioned that this can only run with boards, which are able to >> work with SPL. I guess here SPL means Second Programm Bootloader. I'm >> not an expert in this area, but wouldn't it be possible to run every >> board with an SPL, since it's just Software like a Bootloader? > >Of course, but not all boards supported in mainline were converted to >use SPL, and for this reason not all boards support out of the box >Falcon Mode. So this "part" of including more and more boards is up to the U-Boot team, not of the Board developer ? ( except one would like to do this by himself .. ) >> And if >> not what is the "real" eye of the needle here ? I'm just asking >> because I didn't get the problem here. > >It is simply a snapshot of the current U-Boot mainline. The switch >between Linux/U-Boot is implemented in SPL, and this makes sense because >SPL is much smaller that the whole U-Boot, dropping also the time that a >SOC needs to load an image from the storage media. That's what I understood too. I gotta say, this sounds like a working alternative to skipping U-Boot completely when it comes too keep the boot times at their lowest, I like that implementation. Kind Regards, Frank
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