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kernel: M3 DONE — full WardenOS boots on the self-built 6.18 kernel

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Adding the eMMC dw_mmc node (mmc@ffa90000, clocks from cru + grf_cru) was all M3
needed. On warden-c8a3 the 6.18 kernel enumerates the eMMC at HS200
(mmcblk0 8GTF4R 7.28 GiB), mounts the ext4 rootfs, runs /sbin/init, and starts
every WardenOS daemon. Serial root login confirms:

  Linux warden-c8a3 6.18.46 armv7l
  ps: warden-flared warden-modbus warden-mikrotik warden-asic warden-ui warden-flight

Expected M4/M5 gaps are clean failures: the 5.10 aic8800 wifi/BT .ko won't load on
6.18 (vermagic), and no backlight/framebuffer yet (no VOP node). Next: M4 display,
M5 AIC8800 SDIO port, M6 the rest; plus a lean defconfig + Buildroot-on-6.18.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_017wB8KB3MMQztRDXCMCkPrf
This commit is contained in:
BFE Engineering
2026-08-24 20:40:53 -06:00
co-authored by Claude Opus 4.8
parent f3087399f2
commit b5a448fa84
3 changed files with 66 additions and 12 deletions
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kernel/docs/m2-boot-on-c8a3.md
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@@ -84,8 +84,19 @@ pre-MMU), then fixed:
CP2102 bench adapter — so the M2 DT pins 115200 for readable bring-up; production
overrides to 1.5M.
## Next (M3)
## M3 (same session): ✅ the full WardenOS runs on the 6.18 kernel
The kernel mounts the 5.10 rootfs_b but the userspace/modules are 5.10 (vermagic
mismatch). M3: lean RV1106 defconfig, `dw_mmc`/`sdhci` DT (eMMC already probes —
`MMC0: HS200`), and our Buildroot userspace rebuilt on 6.18.
Adding the eMMC `dw_mmc` node (`mmc@ffa90000`, clocks from cru + grf_cru) was the
only change M3 needed — the mmc/ext4 drivers are already in-config. The kernel
enumerated the eMMC at HS200, mounted the ext4 rootfs, ran `/sbin/init`, and
started every WardenOS daemon. A serial root login confirms `uname -a` →
`Linux warden-c8a3 6.18.46 armv7l`, with `warden-flared/-modbus/-mikrotik/-asic/
-ui/-flight` all running. Expected M4/M5 gaps show cleanly: the 5.10 aic8800 `.ko`
won't load (vermagic → M5), and there's no backlight/framebuffer yet (→ M4).
**Console lesson applied:** with `console=ttyS2,115200` the whole boot is readable
on the CP2102 (the 1.5M vendor rate is garbage on it). Serial login uses the same
`c8a3_run.py` [bench-creds] helper as the 5.10 firmware — the userspace is unchanged.
Next: M4 (VOP2 display + panel + touch), M5 (AIC8800 SDIO port + our 4 patches),
M6 (RGA/watchdog/HPMCU/USB-OTG); plus a lean defconfig + Buildroot-on-6.18 cleanup.