Howdy! Am Do., 5. Mai 2022 um 10:43 Uhr schrieb jchludzinski via lists.yoctoproject.org <jchludzinski=vivaldi....@lists.yoctoproject.org>: > > OK, let's go with that. > > I've watched the "Live Coding with Yocto Project #1: download and first > build" youtube video. Where is the BSP built in this procedure?
The BSP that is implicitly used in that video is the generic QEMU one, which comes included with poky. Technically speaking, it lives in https://git.yoctoproject.org/poky/tree/meta/conf/machine and https://git.yoctoproject.org/poky/tree/meta/recipes-kernel/linux/linux-yocto_5.15.bb A BSP can be many things, and this one is a rather small one, as booting into and running linux on QEMU doesn't need patching and all that, so in that case it comes pretty close to the perfect world that Michael mentioned. Greetz, Josef (who did that video, actually) > > > > On 2022-05-05 03:16, Michael Opdenacker via lists.yoctoproject.org > wrote: > > On 5/5/22 08:39, jchludzinski via lists.yoctoproject.org wrote: > >> A board-support-package (BSP) is software that provides a layer of > >> abstraction from the physical board specifics for the host embedded OS > >> (e.g., VXworks). > >> > >> I believe the device tree files (*.dts, *dtsi) in OE Linux provide the > >> same function. It allows to OE kernel code to be independent of device > >> specifics. > > > > > > The Device Tree files are just descriptions of the hardware. In a > > perfect world, you could indeed use the same mainline kernel to support > > all possible devices. However, that kernel would be unnecessarily big > > for your custom system. You most probably want to customize its > > configuration, and may also need custom kernel drivers and patches. > > There's also the need for a bootloader compiled for your platform. > > > > That's why we need BSPs :-) > > > > Cheers, > > Michael. > > > > > > > > >
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