> From: Simon Glass <s...@chromium.org> > Date: Sun, 6 Mar 2022 05:49:43 -0700 > > The bootflow feature provide a built-in way for U-Boot to automatically > boot an Operating System without custom scripting and other customisation. > This is called 'standard boot' since it provides a standard way for > U-Boot to boot a distro, without scripting. > > It introduces the following concepts: > > - bootdev - a device which can hold a distro > - bootmeth - a method to scan a bootdev to find bootflows (owned by > U-Boot) > - bootflow - a description of how to boot (owned by the distro) > > This series provides an implementation of these, enabled to scan for > bootflows from MMC, USB and Ethernet. It supports the existing distro > boot as well as the EFI loader flow (bootefi/bootmgr). It works > similiarly to the existing script-based approach, but is native to > U-Boot. > > With this we can boot on a Raspberry Pi 3 with just one command: > > bootflow scan -lb > > which means to scan, listing (-l) each bootflow and trying to boot each > one (-b). The final patch shows this. > > With a standard way to identify boot devices, booting become easier. It > also should be possible to support U-Boot scripts, for backwards > compatibility only.
For the record. In its current state this series breaks booting on Apple M1: Hit any key to stop autoboot: 0 Flags not supported: enable CONFIG_BOOTFLOW_FULL bootflow - Boot flows Usage: bootflow scan - boot first available bootflow => I'll see if I can actually convert this board to "standard boot". But I think this means that this breaks the majority of the boards currently in the tree.
