Hi Simon, On 29.11.23 20:00, Simon Glass wrote: > On Wed, 29 Nov 2023 at 11:35, Ahmad Fatoum <a.fatoum@xxxxxxxxxxxxxx> wrote: >> Doesn't hardcoding a load address and entry address here defeat the point >> of having FIT as generic portable image format? >> >> At least barebox will try to place the kernel image at physical address 0 and >> will exit with an error message if no SDRAM is located at that address. >> The recommendation in that case is to omit load and entry address altogether >> to have barebox find a suitable location, but I see now that the FIT specification >> requires a load and entry address. What would happen if U-Boot tries to load this >> FIT image on a board that has no DRAM at address 0? > > The 'kernel_noload' type indicates that the load/exec address are ignored. Can the script not insert load/exec addresses with dummy values to avoid confusion? >> Please Cc me on subsequent revisions. I am interested in testing that this works for barebox >> too. > > There has been some discussion about this recently in U-Boot too, > along with a series [1] which you could try if you like. Thanks for the pointer. I have just sent out a first patch to add support for kernel_noload to the barebox mailing list[1]. With that change applied, barebox can boot the FIT images generated by this series. Once that's accepted, I'll reply with a Tested-by. [1]: https://lore.barebox.org/barebox/20231129203106.2417486-1-a.fatoum@xxxxxxxxxxxxxx/T/#u > The FIT spec[2] does not provide enough detail on exactly what > kernel_noload means and we should improve this at some point. Yes, that would be nice. Also straight references to e.g. U-Boot configuration symbols could use some rewording. Thanks, Ahmad > > Regards, > Simon > > [1] https://patchwork.ozlabs.org/project/uboot/list/?series=382849 > [2] https://github.com/open-source-firmware/flat-image-tree > > > >> >> Thanks, >> Ahmad >> >> -- >> Pengutronix e.K. | | >> Steuerwalder Str. 21 | http://www.pengutronix.de/ | >> 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | >> Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 | >> > -- Pengutronix e.K. | | Steuerwalder Str. 21 | http://www.pengutronix.de/ | 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |
