On Fri, Oct 4, 2019, 7:04 PM Davis Roman <davis.roma...@gmail.com> wrote:
> Hello, > > We're working on a Linux distro for two systems where one is based on > NXP i.mx6(32-bit,armv7) and the other i.mx8(64-bit,armv8). > > I have two machine types defined in Yocto so individually I can build > either one however our goal is to create a single distro that can run on > both processors. > > So the idea is to use BBMULTICONFIG( > https://www.yoctoproject.org/docs/latest/ref-manual/ref-manual.html#var-BBMULTICONFIG > ) > to build two separate images, > > 1) a 32-bit distro for an i.mx6 > 2) a 64-bit distro for an i.mx8 > > and then finally, take the 32-bit distro and add the 64-bit kernel+modules > and u-boot. > > --------------------------------------- > |--------------------------------------| > || 32-bit rootfs || > |--------------------------------------| > |----------------- ----------------- | > || 32-bit kernel | | 64-bit kernel || > |----------------- ----------------- | > |----------------- ----------------- | > || 32-bit u-boot | | 64-bit u-boot || > |----------------- ----------------- | > --------------------------------------- > i.mx6solo i.mx8m mini > > We've already tried our existing 32-bit rootfs + 64-bit kernel/u-boot on > the i.mx8 and the system runs. > So in theory, it should just be a matter of getting yocto to assemble all > the pieces together. > > I don't have much experience with BBMULTICONFIG so any ideas or comments > on how to proceed would be appreciated. > You are on the right track. Create two multiconfig files one for each machine, then user mcdepends ( https://www.yoctoproject.org/docs/current/mega-manual/mega-manual.html#dev-enabling-multiple-configuration-build-dependencies) to pull the 64 bit kernel, etc. into the 32 bit image. BBMULTICONFIG is used in local.conf to select which multiconfigs you want to enable. In your case it would have to list both of the ones that you define. > Thank you, > > Davis > -- > _______________________________________________ > yocto mailing list > yocto@yoctoproject.org > https://lists.yoctoproject.org/listinfo/yocto >
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