scripts: Add the prepare-kernel.sh script

Signed-off-by: Georgi Djakov <georgi.djakov@linaro.org>

1 files changed, 68 insertions, 0 deletions

diff --git a/scripts/prepare-kernel.sh b/scripts/prepare-kernel.sh
new file mode 100755
index 0000000..62637f4
--- /dev/null
+++ b/scripts/prepare-kernel.sh
@@ -0,0 +1,68 @@
+#!/bin/bash
+#
+# prepare-kernel.sh
+#
+# This is a script to pull the latest kernel image from kernelci.org, re-pack the
+# kernelci modules into initramfs. It will also probe the module for the USB
+# ethernet controller we use in the LAVA farm.
+#
+# Author:
+#	Georgi Djakov <georgi.djakov@liaro.org>
+#
+
+set -e
+
+VER=$(wget -o /dev/null https://www.kernel.org/feeds/kdist.xml -O - | xml2 | grep -Eo  "title=.*mainline" | sed 's/.*=//' | cut -f 1 -d : | tr -d '\n')
+
+echo "Downloading mainline kernel $VER from kernelci..."
+
+wget -o /dev/null -O Image https://storage.kernelci.org/mainline/master/v${VER}/arm64/defconfig/gcc-8/Image
+wget -o /dev/null -O apq8016-sbc.dtb https://storage.kernelci.org/mainline/master/v${VER}/arm64/defconfig/gcc-8/dtbs/qcom/apq8016-sbc.dtb
+wget -o /dev/null -O modules.tar.xz https://storage.kernelci.org/mainline/master/v${VER}/arm64/defconfig/gcc-8/modules.tar.xz
+wget -o /dev/null -O rootfs.cpio.gz http://people.linaro.org/~georgi.djakov/rootfs.cpio.gz
+
+echo "Creating initramfs with modules..."
+
+TMPDIR=$(mktemp -d) || exit
+cd $TMPDIR
+xzcat $OLDPWD/modules.tar.xz | cpio -id --quiet
+
+# The board has an Asix USB Ethernet controller used for WA
+mkdir -p "etc/network"
+cat << EOF > etc/network/interfaces
+auto lo
+iface lo inet loopback
+allow-hotplug eth0
+iface eth0 inet dhcp
+EOF
+
+mkdir -p "etc/init.d"
+cat << EOF > etc/init.d/S30modules
+/sbin/modprobe asix
+sleep 10
+ifconfig eth0 up
+udhcpc -n -i eth0 -t 6
+EOF
+chmod +x etc/init.d/S30modules
+
+find . | cpio -o -H newc --quiet | gzip -9 > $OLDPWD/modules.cpio.gz
+cd "$OLDPWD"
+rm -rf "$TMPDIR"
+
+gzip -f Image
+cat Image.gz apq8016-sbc.dtb > Image.gz+dtb
+cat rootfs.cpio.gz modules.cpio.gz > ramdisk.img
+
+#CMDLINE="root=/dev/disk/by-partlabel/rootfs rw rootwait console=tty0 console=ttyMSM0,115200n8"
+CMDLINE="root=/dev/ram0 console=tty0 console=ttyMSM0,115200n8 earlycon ignore_loglevel"
+
+echo "Creating boot.img..."
+
+mkbootimg --kernel Image.gz+dtb \
+	--pagesize 2048 --base 0x80000000 --kernel_offset 0x8000 --ramdisk_offset 0x1000000 --tags_offset 0x100 \
+	--cmdline "${CMDLINE}" \
+	--ramdisk ramdisk.img \
+	--output boot.img
+gzip -f boot.img
+
+echo "Done!"