https://www.marcusfolkesson.se/tags/booting/ Recent content in Booting on Marcus Folkesson Hugo en-us Sat, 17 Aug 2024 12:39:34 +0200 https://www.marcusfolkesson.se/blog/board-bring-up-part4/ Sat, 17 Aug 2024 12:39:34 +0200 https://www.marcusfolkesson.se/blog/board-bring-up-part4/ Board bring-up part 4: Wrap it up I'm currently working with a board bring up for a custom hardware based on a OMAPL138 from Texas Instruments. It is fun to work with "real" bring-ups. Most of my customers use System On Modules (SoM:s) these days. You get a lot for free with those modules but a lot of the fun is stripped away. This post is not intended to be guide, it is more of a follow-me-through-my-work-post divided into three parts. https://www.marcusfolkesson.se/blog/board-bring-up-part3/ Fri, 16 Aug 2024 12:39:34 +0200 https://www.marcusfolkesson.se/blog/board-bring-up-part3/ Board bring-up part 3: Other peripherals I'm currently working with a board bring up for a custom hardware based on a OMAPL138 from Texas Instruments. It is fun to work with "real" bring-ups. Most of my customers use System On Modules (SoM:s) these days. You get a lot for free with those modules but a lot of the fun is stripped away. This post is not intended to be guide, it is more of a follow-me-through-my-work-post divided into three parts. https://www.marcusfolkesson.se/blog/board-bring-up-part2/ Thu, 15 Aug 2024 12:39:34 +0200 https://www.marcusfolkesson.se/blog/board-bring-up-part2/ Board bring-up part 2: NAND flash I'm currently working with a board bring up for a custom hardware based on a OMAPL138 from Texas Instruments. It is fun to work with "real" bring-ups. Most of my customers use System On Modules (SoM:s) these days. You get a lot for free with those modules but a lot of the fun is stripped away. This post is not intended to be guide, it is more of a follow-me-through-my-work-post divided into three parts. https://www.marcusfolkesson.se/blog/board-bring-up-part1/ Wed, 14 Aug 2024 12:39:34 +0200 https://www.marcusfolkesson.se/blog/board-bring-up-part1/ Board bring-up part 1: Memory hassle I'm currently working with a board bring up for a custom hardware based on a OMAPL138 from Texas Instruments. It is fun to work with "real" bring-ups. Most of my customers use System On Modules (SoM:s) these days. You get a lot for free with those modules but a lot of the fun is stripped away. This post is not intended to be guide, it is more of a follow-me-through-my-work-post divided into three parts. https://www.marcusfolkesson.se/blog/flattened-image-tree/ Tue, 14 May 2024 11:00:34 +0100 https://www.marcusfolkesson.se/blog/flattened-image-tree/ Flattened Image Tree (FIT) with Yocto Long time ago, I wrote a post [1] that compared the legacy Image format against Flattened Image Tree Format (FIT) [2] and highlighted the benefits of using it. The benefits are still valid and FIT images are my preferred way to boot a Linux kernel. Despite that, I almost never see FIT images used in examples nor Board Support Packages (BSPs). So this post is mostly to give some more attention to the FIT images because I think it deserves it. https://www.marcusfolkesson.se/blog/fit-vs-legacy-image-format/ Wed, 18 Oct 2017 19:39:34 +0200 https://www.marcusfolkesson.se/blog/fit-vs-legacy-image-format/ FIT vs legacy image format U-Boot supports several image formats when booting a kernel. However, a Linux system usually need multiple files for booting. Such files may be the kernel itself, an initrd and a device tree blob. A typical embedded Linux system have all these files in at least two-three different configurations. It's not uncommon to have a Default configuration Rescue configuration Development configuration Production configuration ... Only these four configurations may end up with unmanageable amount of different files.