Hi Robert, I took a look at your step by step guide for building u-boot, but I did not have much success. I am trying to build a stock image of u-boot which will load Angstrom on the eMMC. Building u-boot from the most recent source in the git repository did not produce a u-boot.img/MLO combination that could successfully boot angstrom from the eMMC (used am335x_boneblack_config). Do you have any suggestions? I would really like to get this working so that I can update some control register bits that are only available in a secure privileged mode - the current Angstrom distribution for the BeagleBone Black does not have the L1NEON bit set (which allows the NEON unit to access the L1 cache). -Aaron
On Monday, August 19, 2013 8:12:23 AM UTC-4, Robert P. J. Day wrote: > > On Sun, 18 Aug 2013, Tom Rini wrote: > > > On Friday, August 16, 2013 9:39:12 AM UTC-4, dennis.c...@gmail.comwrote: > > Hello, > > > > The original u-boot.bin for the BBB boots the kernel with the MPU > frequency set to 520 MHz. �I'm running a non-Linux kernel which > > currently has some difficulties changing the frequency to 1 GHz. > �I saw a patch go into U-Boot very recently (like a couple of days > > ago) which appears to teach it to recognize the BBB's processor > and increase the MPU frequency to 1 GHz before starting the kernel, so > > I would very much like to replace the u-boot.bin I currently use > with a new one that can do this. > > > > Unfortunately I'm also not in a position to compile a new U-Boot > from source so I'd like to find a new, pre-compiled u-boot.bin which > > has this patch. �Does anyone know where I could find one of > these? > > > > > > They have not been merged yet (and there might need to be some more > > changes required for the general parts of the patch series).� Also > > note, you want u-boot.img not u-boot.bin and you'll need to replace > > MLO as that's where the clock parts end up.� As someone else posted, > > there's a link on how to build U-Boot.� Just follow that general > > instructions, but use current u-boot git, and grab the patches you > > need from http://patchwork.ozlabs.org/project/uboot/list/ > > just catching up here ... not sure if you're referring to my wiki > page on how to build u-boot from scratch for the BBB: > > http://www.crashcourse.ca/wiki/index.php/U-Boot_on_the_BBB > > mostly, that page was meant for showing students a recipe for how to > build a functional u-boot.img for the BBB in a standalone context -- > seems to work -- and as grist for discussion in terms of walking > through the patches and arguing about the purpose of each patch and > giving students an exercise of applying a patch or two and rebuilding. > > i recall tom rini gave a quick overview of the value of each patch > (can't lay hands on the link for that, dang), and i'll take a look at > the ozlabs link tom mentions to see if i can update that page at all. > feedback welcome. as i said, it's not meant so much for reference as > for showing students how to build a simple, functional u-boot. > > rday > > p.s. i did add a final section to that page since its creation: > > > http://www.crashcourse.ca/wiki/index.php/U-Boot_on_the_BBB#Building_a_stock_u-boot_for_the_BBB > > > showing that i do use the current u-boot git for the build. > > -- > > ======================================================================== > Robert P. J. Day Ottawa, Ontario, CANADA > http://crashcourse.ca > > Twitter: http://twitter.com/rpjday > LinkedIn: http://ca.linkedin.com/in/rpjday > ======================================================================== -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
