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docs: Phase 0 of the update system complete and hardware-verified

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Slot-agnostic boot proven on the bench: the same release ext4 boots
from SD and from eMMC p4 steered by the saved env alone. fwup
cross-version compatibility proven; slot-sized rootfs, size gate,
ext4 artifact and mkfw.sh in place. Found for Phase 1: the image
ships no /etc/fw_env.config.
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ScottW514
2026-08-08 12:01:45 -04:00
parent b7eb5fdac5
commit 9d410c646a
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@@ -922,3 +922,13 @@ chooses otherwise).
archive, legacy-p4 migration, and later a refreshed recovery image
in boot0. Full phased plan with invariants and decision gates:
`docs/UPDATE-SYSTEM.md` (builds on the facts-bank eMMC map).
**Phase 0 COMPLETE, hardware-verified 2026-08-08**: slot-agnostic
images (`root=${mmcroot}`; the SAME release ext4 boot-verified from
SD and from eMMC p4, steered by env alone — bench flip test), fwup
toolchain cross-version proven (modern-packed signed `.fw` applies
with the factory's 0.14.2; 0.14.2 wants raw 32-byte pubkeys), fwup
in both images, slot-sized release rootfs + hard size gate + ext4
artifact + `scripts/mkfw.sh`. GAP found for Phase 1: the image
ships fw_env tooling but **no `/etc/fw_env.config`** — hand-placed
on the bench SD system (factory-identical: mmcblk2 0x80000/0x82000,
0x2000, redundant) — the ffboot-v2 recipe must install it.