Add pine64_install_uboot.sh script

package/root/usr/local/sbin/pine64_install_uboot.sh

@@ -0,0 +1,29 @@
+#!/bin/sh
+
+set -e
+
+if [ "$(id -u)" -ne "0" ]; then
+	echo "This script requires root."
+	exit 1
+fi
+
+DEVICE="${1:-/dev/mmcblk0}"
+
+if [ ! -b "$DEVICE" ]; then
+  echo "Block device ${DEVICE} not found."
+  exit 2
+fi
+
+local boot0_position=8     # KiB
+local boot0_size=64        # KiB
+local uboot_position=19096 # KiB
+local uboot_size=1384      # KiB
+
+echo "Flashing boot0 ..."
+dd if="/boot/pine64/boot0-pine64-$(cat /etc/pine64_model).bin" conv=notrunc bs=1k seek=$boot0_position oflag=sync of="${DEVICE}"
+
+echo "Flashing U-Boot ..."
+dd if="/boot/pine64/u-boot-pine64-$(cat /etc/pine64_model).bin" conv=notrunc bs=1k seek=$uboot_position oflag=sync of="${DEVICE}"
+
+sync
+echo "Done - you should reboot now."