Difference between revisions of "U-Boot"
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== External == | == External == | ||
| + | * Repository: [[https://gitlab.denx.de/u-boot/u-boot/]] | ||
* Presentation of U-Boot and porting to devices [https://bootlin.com/pub/conferences/2015/captronic/captronic-porting-linux-on-arm.pdf] | * Presentation of U-Boot and porting to devices [https://bootlin.com/pub/conferences/2015/captronic/captronic-porting-linux-on-arm.pdf] | ||
* Get More out of U-Boot (introduction, partitioning, etc.) [https://github.com/umiddelb/armhf/wiki/Get-more-out-of-%22Das-U-Boot%22] | * Get More out of U-Boot (introduction, partitioning, etc.) [https://github.com/umiddelb/armhf/wiki/Get-more-out-of-%22Das-U-Boot%22] | ||
* Presentation on TPL: SPL loading SPL (and what is SPL?) [http://www.denx.de/wiki/pub/U-Boot/MiniSummitELCE2013/tpl-presentation.pdf] | * Presentation on TPL: SPL loading SPL (and what is SPL?) [http://www.denx.de/wiki/pub/U-Boot/MiniSummitELCE2013/tpl-presentation.pdf] | ||
* Distro boot Linux: [[https://developer.toradex.com/knowledge-base/distro-boot-linux]] | * Distro boot Linux: [[https://developer.toradex.com/knowledge-base/distro-boot-linux]] | ||
Revision as of 18:22, 28 March 2020
Linux friendly bootloader. Used in various ARM devices like PinePhone and Orange Pi.
Contents
Boot process
Definitions
General
- SPL (Secondary Program Loader) is a small binary, generated from U-Boot source, that fits in the SRAM and loads the main U-Boot into system RAM. [1]
- TPL (Tertiary Program Loader) is a tiny SPL which loads moderate-sized middle layer called TPL and that loads the full U-Boot into RAM.
Board-specific
- ATF (ARM Trusted Firmware)
Device Tree
- DTB (Device Tree Blob) TODO: Enhance
- ITB TODO: ???
- FIT (Flat Image Tree) TODO: Enhance
