Add support for firmware updates via RAUC on aarch64. The created RAUC
bundle (images/infix-$BR2_ARCH.pkg) is signed with the same key used
to sign the raw FIT image.
Similarly to how $(call IXMSG,"hello world") outputs a blue
information line from a makefile, provide `ixmsg` to accomplish the
same thing in shell scripts.
Use a different prefix (`#!:` vs `>>>`) to differentiate it from
makefile output.
On amd64, we use grub instead of U-Boot, because yours truly can't
figure out how to handle ACPI handover to the kernel.
The resulting image is now called disk.img instead of the old mmc.img,
since we can use it over any interface (e.g. virtio or SCSI).
This image contains:
- A partition to hold bootloader config ("aux").
- Two redundant copies of the FIT framed rootfs (which will be
upgradable by RAUC from within Infix).
- A partition to store critical configuration data ("cfg")
- A partition to store data created dynamically by Infix ("var")
mkimage will generate an FIT image containing a signature of the
rootfs, where the data is kept out of the DTB data structure, i.e.:
.---------.
| DTB |
:---------:
| Padding |
:---------:
| |
| |
| rootfs |
| |
| |
'---------'
This is the on-disk format of Infix. At boot, we extract kernel and
device trees from the rootfs, and then use Linux's device mapper to
create a virtual block device that exposes the rootfs (squash).
Initial defconfig is based on Buildroot qemu_x86_64_defconfig, with a
Bootlin pre-built toolchain and a very basic qemu.sh script, generated
by a local post-image.sh, for `make run`.
Signed-off-by: Joachim Wiberg <troglobit@gmail.com>
Tobias Waldekranz