That is amazing. I have been looking for this type of project for a long time. Thank you very much. I will start to look at your patches. Will the patches work well with the newer versions like U-Boot 2011.09 or later, or is there a more specific version you recommend. Thanks.
On Mon, Sep 26, 2011 at 10:32 AM, Simon Schwarz < simonschwarz...@googlemail.com> wrote: > On 09/26/2011 04:30 PM, Dat Tran wrote: > >> Sorry for my ignorance on this issue. My current system (Overo) does >> this when it boots: >> >> ROM Code -> X-Load (MLO) -> U-Boot -> Linux Kernel -> Root File System >> >> Does the SPL patch allow me to do this?: >> >> ROM Code -> U-Boot (MLO) -> Linux Kernel -> Root File System >> > ^U-Boot SPL > > >> >> Also running the latest X-Loader 1.50 and U-Boot 2011.09-rc1, it takes >> about 2 seconds from power on to starting the Linux Kernel. My Kernel >> takes 1 second to load and my file system takes another 1.5 seconds for >> a total of 4.5 seconds from power on to the login prompt on serial. I >> assume the U-Boot-SPL will only speed up the first half of my boot time. >> > correct. > > > If so, how much of a difference do you think I will see with this patch. >> > I can't say it for your case. > > I did this on a devkit8000 loading from NAND. The U-Boot (unoptimized) took > 3189 ms and Xloader took 1170 ms. By using the SPL this was reduced to 850 > ms. Another patch I'am working on ATM is utilizing DMA to copy the Linux > images - this reduces the time spend in SPL to 220 ms. > > >> Thanks. >> >> > Regards > Simon > > On Mon, Sep 26, 2011 at 7:40 AM, Simon Schwarz >> <simonschwarzcor@googlemail.**com <simonschwarz...@googlemail.com><mailto: >> simonschwarzcor@**googlemail.com <simonschwarz...@googlemail.com>>> >> wrote: >> >> Stands for Second Program Loader. >> >> It loads the U-Boot and runs it - or with this patch a Linux Kernel. >> >> Regards >> Simon >> >> >> On 09/26/2011 02:30 PM, Dat Tran wrote: >> >> What does SPL stand for again? It looks really interesting. >> >> Thanks. >> >> On Mon, Sep 26, 2011 at 3:56 AM, Simon Schwarz >> <simonschwarzcor@googlemail.__**com >> >> <mailto:simonschwarzcor@**googlemail.com<simonschwarz...@googlemail.com> >> > >> <mailto:simonschwarzcor@__goog**lemail.com <http://googlemail.com> >> >> >> <mailto:simonschwarzcor@**googlemail.com<simonschwarz...@googlemail.com> >> >>> >> >> wrote: >> >> On 09/25/2011 10:03 PM, dtran11 wrote: >> >> >> I am trying to make uboot boot as fast as possible for >> my omap3 >> Overo board. >> I add the below to my config header file. Does anyone see >> anything I can add >> to it to make the build smaller and faster? Thank you. >> >> >> [SNIP] >> >> This may be of interest to you: >> http://article.gmane.org/____**gmane.comp.boot-loaders.u-____** >> boot/108814<http://article.gmane.org/____gmane.comp.boot-loaders.u-____boot/108814> >> <http://article.gmane.org/__**gmane.comp.boot-loaders.u-__** >> boot/108814<http://article.gmane.org/__gmane.comp.boot-loaders.u-__boot/108814> >> > >> <http://article.gmane.org/__**gmane.comp.boot-loaders.u-__** >> boot/108814<http://article.gmane.org/__gmane.comp.boot-loaders.u-__boot/108814> >> <http://article.gmane.org/**gmane.comp.boot-loaders.u-** >> boot/108814<http://article.gmane.org/gmane.comp.boot-loaders.u-boot/108814> >> >> >> >> But will take some hacking to adapt. >> >> Regards >> Simon >> >> >> >> >> >
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