Wednesday, March 21, 2018

[fedora-arm] Re: How boot process works

On Wed, Mar 21, 2018 at 8:00 AM, Alessio Ciregia <> wrote:
> Hello.
> I know, there is google. :-)
> But someone could suggest a document that explains in simple words how the
> Raspberry Pi boot process works? In Fedora I know there is a vfat partition.
> What are the involved files? Who tell to look for the uboot file? Etc.
> Please be patient, I'm not a developer nor an engineer, just asking to
> understand a little bit more how things works.

1) The GPU firmware loads off the VFAT partition (google for exactly
what the various files do)
2) the firmware then loads the "kernel" if it's specified in the
config.txt or else the defaults
3) u-boot loads
4) u-boot then boots what it finds, in the case of ARMv7 this is the
linux kernel based on the extlinux.conf file, in the case of aarch64
this is grub using the uEFI implementation in u-boot.
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