hostapp-update-hooks: Add boot blob update support for NX

Jetson NX stores all signed bootloaders in a separate memory. We generate this blob in tegra194-nxde-flash-dry recipe. Signed-off-by: Alexandru Costache <[email protected]>
balena-os · Jun 12, 2020 · 79cab4d · 79cab4d
1 parent 615643b
commit 79cab4d
Showing 1 changed file with 14 additions and 0 deletions.
diff --git a/...etson/recipes-support/hostapp-update-hooks/files/99-resin-bootfiles-xavier-nx-devkit-emmc b/...etson/recipes-support/hostapp-update-hooks/files/99-resin-bootfiles-xavier-nx-devkit-emmc
@@ -8,6 +8,8 @@ set -o errexit
 
 . /usr/libexec/os-helpers-fs
 
+bootloader_device="/dev/mtdblock0"
+bootloader_blob="/opt/tegra-binaries/boot0.img"
 new_part=$(findmnt --noheadings --canonicalize --output SOURCE "/mnt/sysroot/inactive" -t ext4)
 echo "New partition is ${new_part}"
 
@@ -61,5 +63,17 @@ echo "[INFO] Writing kernel ${kernel} to specific partitions..."
 dd if=/opt/tegra-binaries/${kernel}  of=$(get_state_path_from_label "kernel")
 dd if=/opt/tegra-binaries/${kernel}  of=$(get_state_path_from_label "kernel_b")
 
+existing_bootloader_md5sum=$(dd if=$bootloader_device bs=1M status=none | md5sum | awk '{print $1}')
+update_bootloader_md5sum=$(md5sum $bootloader_blob | awk '{print $1}')
+
+if [ ! "$existing_bootloader_md5sum" = "$update_bootloader_md5sum" ]; then
+    echo "[INFO] Will update bootloader device"
+    flash_erase /dev/mtd0 0 0
+    dd if=$bootloader_blob of=$bootloader_device bs=1M
+else
+    echo "[INFO] No need to update bootloader device"
+fi
+
 sync
+
 echo "Done."