vhaudiquet 64e19c213a krane-fb-stub: arm64 framebuffer test payload for depthcharge ...

Minimal freestanding arm64 binary that depthcharge boots as a kernel:
parses depthcharge's /firmware/coreboot DTB node, walks the coreboot
table, finds LB_TAG_FRAMEBUFFER, and paints red/yellow/green/blue
checkpoints (~2s each) into the live boot-splash framebuffer.

Verified against coreboot tables header, Linux arm64 booting.rst, and
depthcharge's fit.c/boot64.c. Host parser tests pass against the live
/sys/firmware/fdt; full red->yellow->green->blue sequence verified
end-to-end under qemu-system-aarch64; packed image verifies with the
ChromeOS devkeys.

2026-08-29 19:21:28 +02:00

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