alloncm

https://developer.arm.com/documentation/den0013/d/Boot-Code/Booting-a-bare-metal-system

https://wiki.osdev.org/Raspberry_Pi_Bare_Bones_Rust

https://github.com/s-matyukevich/raspberry-pi-os/issues/8

https://stackoverflow.com/questions/42824706/qemu-system-aarch64-entering-el1-when-emulating-a53-power-up

https://developer.arm.com/documentation/ddi0406/cb/System-Level-Architecture/The-System-Level-Programmers--Model/ARM-processor-modes-and-ARM-core-registers/ARM-processor-modes?lang=en

https://github.com/BrianSidebotham/arm-tutorial-rpi

https://github.com/LdB-ECM/Raspberry-Pi/blob/master/10_virtualmemory/SmartStart32.S

https://forums.raspberrypi.com/viewtopic.php?t=168976

http://classweb.ece.umd.edu/enee447.S2021/baremetal_boot_code_for_ARMv8_A_processors.pdf

https://www.macs.hw.ac.uk/~hwloidl/Courses/F28HS/Docu/DEN0013D_cortex_a_series_PG.pdf