## U-Boot 2018 Based on mainline U-Boot. ### Dependencies - bison (YACC-compatible parser generator) - flex (fast lexical analyzer generator) - bc (GNU bc arbitrary precision calculator language) - openssl/bn.h header (Secure Sockets Layer toolkit - development files) - make (GNU Make) - gcc (GNU C Compiler) Under Debian / Ubuntu, the dependencies can be installed using ```bash sudo apt-get -y install bison flex bc libssl-dev make gcc ``` ### Cross compiler Even though mainline U-Boot requires GCC minimum version 6, it would generate oversized SPL (Secondary Program Loader) image. Therefore it is recommended to use GCC version 7. #### Ubuntu 18.04 LTS Install the toolchain. ```bash sudo apt -y install gcc-arm-linux-gnueabihf binutils-arm-linux-gnueabihf ``` Setup environment for cross compiling. ```bash export ARCH=arm export CROSS_COMPILE=arm-linux-gnueabihf- ``` #### Other OS/ Distribution Other OS / Distribution that does not have GCC version 7 such as Debian, should use Linaro arm-linux-gnueabihf toolchain. Download and extract the toolchain. ```bash cd ~ wget http://releases.linaro.org/components/toolchain/binaries/7.3-2018.05/arm-linux-gnueabihf/gcc-linaro-7.3.1-2018.05-x86_64_arm-linux-gnueabihf.tar.xz tar Jxf gcc-linaro-7.3.1-2018.05-x86_64_arm-linux-gnueabihf.tar.xz ``` !!! note Latest Linaro toolchain version 7 can be found [here](http://releases.linaro.org/components/toolchain/binaries/latest-7/arm-linux-gnueabihf/). Setup environment for cross compiling. ```bash export ARCH=arm export CROSS_COMPILE=~/gcc-linaro-7.3.1-2018.05-x86_64_arm-linux-gnueabihf/bin/arm-linux-gnueabihf- ``` ### Compile U-Boot ```bash git clone https://github.com/helios-4/u-boot.git -b helios4 cd u-boot make mrproper make helios4_defconfig ``` !!! note To support Armbian boot script (/boot/boot.scr), please apply [this patch](/helios4/files/uboot/u-boot-mainline-armbian-boot-script-support.patch) to U-Boot source code before *make helios4_defconfig* #### SD Card image ```bash make -j$(nproc) ``` it would produced **u-boot-spl.kwb** #### SPI NOR flash image Since *helios4_defconfig* targeting SD card image, we need to modified the configuration to generate SPI NOR flash image before compiling. ```bash mv -f .config .config_mmc awk '{\ gsub(/CONFIG_MVEBU_SPL_BOOT_DEVICE_MMC=y/,"# CONFIG_MVEBU_SPL_BOOT_DEVICE_MMC is not set");\ gsub(/# CONFIG_MVEBU_SPL_BOOT_DEVICE_SPI is not set/,"CONFIG_MVEBU_SPL_BOOT_DEVICE_SPI=y");\ gsub(/CONFIG_ENV_IS_IN_MMC=y/,"# CONFIG_ENV_IS_IN_MMC is not set");\ gsub(/# CONFIG_ENV_IS_IN_SPI_FLASH is not set/,"CONFIG_ENV_IS_IN_SPI_FLASH=y");\ }1' .config_mmc >> .config rm -f .config_mmc make -j$(nproc) ``` it would produced **u-boot-spl.kwb** ### Customize U-Boot U-Boot has configuration editor based on ncurses similar like Linux Kernel configuration editor. Install ncurses development files. Under Debian/Ubuntu can be done using this command ```bash sudo apt-get -y install libncurses5-dev ``` Launch configuration editor ```bash make menuconfig ``` ![menuconfig main](/helios4/img/u-boot/u-boot_menuconfig_main.png) After exiting the configuration editor and saving the configuration, build the image according to [SD Card image](#sd-card-image) or [SPI NOR flash image](#spi-nor-flash-image) instructions. - - - ## Marvell U-Boot 2013.01 Based on U-Boot 2013.01 Marvell version: 2015_T1.0p16 ### Cross compiler Under Debian / Ubuntu you need first to install the necessary packages and tools for cross compiling for ARM. ```bash sudo apt-get install gcc make gcc-arm-linux-gnueabi binutils-arm-linux-gnueabi ``` Other option, use Linaro cross compiler 4.9.4 arm-gnueabi toolchain. Download [here](https://releases.linaro.org/components/toolchain/binaries/4.9-2017.01/arm-linux-gnueabi/). !!! Note DO NOT use hard-float variant (arm-linux-gnueabihf). ### Compile U-Boot ```bash git clone https://github.com/helios-4/u-boot-marvell.git cd u-boot-marvell export ARCH=arm export CROSS_COMPILE="/path/to/cross/compiler" export CROSS_COMPILE_BH=${CROSS_COMPILE} make mrproper ``` !!! note To compile using Ubuntu 16.04 cross compiler, please apply [this patch](https://github.com/armbian/build/blob/master/patch/u-boot/u-boot-mvebu/tools-bin_hdr-compiler-fixes.patch) to U-Boot source code. !!! note To support Armbian boot script (/boot/boot.scr), please apply [this patch](/helios4/files/uboot/u-boot-armbian-boot-script-support.patch) to U-Boot source code. #### SD Card image ``` ./build.pl -f mmc -b armada_38x_helios4 ``` it would produced *u-boot-a38x-**mm**-**d**-mmc.bin* whereas **mm** is month and **d** is day. For example, building u-boot on October 2nd would produced *u-boot-a38x-10-2-mmc.bin* #### SPI NOR flash image ``` ./build.pl -f spi -b armada_38x_helios4 ``` it would produced *u-boot-a38x-**mm**-**d**-spi.bin* whereas **mm** is month and **d** is day. For example, building u-boot on October 2nd would produced *u-boot-a38x-10-2-spi.bin* ## Write U-Boot to Boot Device ### MicroSD Card !!! note Replace **u-boot-spl.kwb** with **u-boot-a38x-*-mmc.bin** in command below if you are using Marvell U-Boot 2013.01 #### On Development PC 1) Put SD card to Memory Card Reader 2) Write U-Boot image (u-boot-spl.kwb) to Memory Card Reader (eg. /dev/sdc) and reboot ``` sudo dd if=u-boot-spl.kwb of=/dev/sdc bs=512 seek=1 status=noxfer sudo sync ``` 3) Remove the SD card and put it to Helios4. #### Live System - Under Armbian 1) Upload the U-Boot SPI binary that you built on your PC to Helios4 and rename it as **u-boot.mmc**. ``` scp u-boot-spl.kwb root@10.10.10.1:/usr/lib/linux-u-boot-next-helios4_*/u-boot.mmc ``` 2) SSH to Helios4 ``` ssh root@10.10.10.1 ``` 3) Run **nand-sata-install** utility ``` sudo nand-sata-install ``` 4) Select option **Install/Update the bootloader on SD/eMMC** ![armbian install bootloader menu](/helios4/img/u-boot/armbian_install_bootloader_sdcard_menu.png) 5) Confirm the operation ![armbian bootloader write confirmation](/helios4/img/u-boot/armbian_install_bootloader_sdcard_write_confirmation.png) 6) Reboot the system #### Live System - Generic Linux 1) Transfer U-Boot image into home folder in Helios4 using scp ``` scp u-boot-spl.kwb root@10.10.10.1:~/ ``` 2) SSH to Helios4 ``` ssh root@10.10.10.1 ``` 3) Write U-Boot image (u-boot-spl.kwb) to SD Card device (/dev/mmcblk0) and reboot ``` sudo dd if=u-boot-spl.kwb of=/dev/mmcblk0 bs=512 seek=1 status=noxfer sudo reboot ``` ### SPI NOR Flash Please refer to instructions in [SPI (NOR flash) page](/helios4/spi/#write-u-boot-to-spi-nor-flash).