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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
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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)"