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image: slot-sized release rootfs, ext4 artifact, fwup, mkfw.sh

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The release image now targets the 200 MiB factory eMMC slot: content
plus 40 MiB working space, hard build failure past the slot size. The
raw ext4 is deployed alongside the wic; scripts/mkfw.sh packs it into
a signed .fw with factory-pattern upgrade.a/upgrade.b tasks. fwup
1.16.0 recipe (applies ForgeFIRM and Glowforge-signed archives on
device) is installed in both images. Dev images stay SD-sized with a
256 MiB working margin and no ceiling.

Verified on the 20260808153331 build: release ext4 180.8 MiB; signed
.fw applies byte-exact with fwup 1.16.0 and with the factory's 0.14.2
(raw-format pubkey), and 0.14.2 -V verifies the signature.
This commit is contained in:
ScottW514
2026-08-08 11:37:19 -04:00
parent 888e51d84e
commit 2aac59e0e4
5 changed files with 126 additions and 1 deletions
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meta-forgefirm/recipes-forgefirm/images/forgefirm-image-dev.bb
+5
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@@ -12,6 +12,11 @@ IMAGE_FEATURES += " \
tools-debug \
"
# Dev images boot from SD, never from a 200 MiB eMMC slot: lift the slot
# ceiling and give the filesystem generous working space instead.
IMAGE_ROOTFS_MAXSIZE = ""
IMAGE_ROOTFS_EXTRA_SPACE = "262144"
# Dev builds identify by build timestamp (matches the artifact name),
# tagged so a bench machine is never mistaken for a release.
FORGEFIRM_VERSION_STRING = "${DATETIME} (dev)"
meta-forgefirm/recipes-forgefirm/images/forgefirm-image.bb
+13 -1
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@@ -16,7 +16,19 @@ IMAGE_INSTALL:remove = "gfui-client"
# for $H when homing_mode = gfcloud (/data/forgefirm.conf).
# v4l-utils provides media-ctl / v4l2-ctl for the imx-media pipeline (also a
# forgectrl runtime dependency, kept explicit here for bring-up use).
IMAGE_INSTALL:append = " grblhal-glowforge forgectrl gfhome v4l-utils"
# fwup: applies signed .fw archives (ForgeFIRM upgrades + factory restore)
# to the inactive rootfs slot.
IMAGE_INSTALL:append = " grblhal-glowforge forgectrl gfhome v4l-utils fwup"
# The release rootfs must fit a 200 MiB factory eMMC slot (409600 blocks).
# Sizing: content + 40 MiB working space, hard-capped at the slot size —
# the build fails rather than emit an unflashable image. The raw ext4 is
# deployed alongside the wic; scripts/mkfw.sh packs it into the signed
# .fw release artifact.
IMAGE_FSTYPES:append = " ext4"
IMAGE_OVERHEAD_FACTOR = "1.0"
IMAGE_ROOTFS_EXTRA_SPACE = "40960"
IMAGE_ROOTFS_MAXSIZE = "204800"
# Version stamp: /etc/forgefirm-version (machine-readable), echoed on the
# serial-console login prompt (/etc/issue) and at SSH login (motd).