course · linux-boot-arm
How Linux boots on ARM
Follow three ARM boards from the first instruction in the boot ROM to PID 1, and build every piece yourself.
m00 · Orientation
The whole journey on one screen, and the lab setup.
- The boot chain at a glance explanation
m01 · ARM for booting
Just enough architecture to read every later stage.
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m02 · Power-on and the boot ROM
What happens before any code you wrote runs.
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m03 · TrustZone and secure boot
Two worlds, one monitor, and a chain of trust.
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m04 · First stage and DRAM
Why on-chip SRAM is small and DDR must be set up before use.
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m05 · Trusted Firmware-A
The standard secure boot pipeline.
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m06 · U-Boot
The bootloader you will spend the most time in.
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m07 · Device Tree
How the kernel learns what hardware exists.
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m08 · Building everything
From sources to a bootable SD card image, by hand first.
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m09 · Linux takes over
From the bootloader's jump to the first user process.
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m10 · Capstones and debugging
Full traces per board, and what breaks.
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