1 files changed, 44 insertions, 0 deletions
diff --git a/bootstrap.d/41-uboot.sh b/bootstrap.d/41-uboot.sh
new file mode 100644
index 0000000..507be55
--- /dev/null
+++ b/bootstrap.d/41-uboot.sh
@@ -0,0 +1,44 @@
+#
+# Setup Uboot
+#
+
+. ./functions.sh
+
+# Install gcc/c++ build environment inside the chroot
+if [ "$ENABLE_UBOOT" = true ] || [ "$ENABLE_FBTURBO" = true ]; then
+  chroot_exec apt-get install -q -y --force-yes --no-install-recommends linux-compiler-gcc-4.9-arm g++ make bc
+fi
+
+# Fetch and build U-Boot bootloader
+if [ "$ENABLE_UBOOT" = true ] ; then
+  # Fetch U-Boot bootloader sources
+  git -C $R/tmp clone git://git.denx.de/u-boot.git
+
+  # Build and install U-Boot inside chroot
+  chroot_exec make -C /tmp/u-boot/ rpi_2_defconfig all
+
+  # Copy compiled bootloader binary and set config.txt to load it
+  cp $R/tmp/u-boot/u-boot.bin $R/boot/firmware/
+  printf "\n# boot u-boot kernel\nkernel=u-boot.bin\n" >> $R/boot/firmware/config.txt
+
+  # Set U-Boot command file
+  cat <<EOM >$R/boot/firmware/uboot.mkimage
+# Tell Linux that it is booting on a Raspberry Pi2
+setenv machid 0x00000c42
+
+# Set the kernel boot command line
+setenv bootargs "earlyprintk ${CMDLINE}"
+
+# Save these changes to u-boot's environment
+saveenv
+
+# Load the existing Linux kernel into RAM
+fatload mmc 0:1 \${kernel_addr_r} kernel7.img
+
+# Boot the kernel we have just loaded
+bootz \${kernel_addr_r}
+EOM
+
+  # Generate U-Boot image from command file
+  chroot_exec mkimage -A arm -O linux -T script -C none -a 0x00000000 -e 0x00000000 -n "RPi2 Boot Script" -d /boot/firmware/uboot.mkimage /boot/firmware/boot.scr
+fi