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README.md Update instructions to build U-Boot and ATF with gcc 5.3 toolchain. Jun 19, 2016
u-boot-postprocess.sh Add support to include different bootloaders based on model parameter… May 1, 2017

README.md

U-Boot boot0 compatibility

This script extends a compiled U-Boot with other required parts so it is bootable by the A64 boot0 boot loader.

To be fully compatible with all the scripting in this module, clone the U-Boot tree into build-pine64-image/u-boot-pine64 folder.

BSP U-Boot is loaded in 32-bit mode. So to compile U-Boot you need a properly set up gcc-arm-linux-gnueabihf toolchain. The recommended version to compile U-Boot is 5.3.

Get U-Boot tree

git clone --depth 1 --branch pine64-hacks --single-branch https://github.com/longsleep/u-boot-pine64.git u-boot-pine64

Compile U-Boot

make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- sun50iw1p1_config
make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf-

Get ARM Trust Firmware (ATF)

Similar to U-Boot, this is based on an upstream project with A64 specific patches from Allwinner. Andre Przywara has cleaned up the Allwinner patches - thanks @apritzel. Make sure you use ATF compatible with BSP U-Boot (i keep a fork with the allwinner-a64-bsp branch).

To be fully compatible with all the scripting in this module, clone the ATF tree into build-pine64-image/arm-trusted-firmware-pine64 folder.

git clone --branch allwinner-a64-bsp --single-branch https://github.com/longsleep/arm-trusted-firmware.git arm-trusted-firmware-pine64

Compile ARM Trust Firmware (ATF)

The recommended aarch64 toolchain to compile ATF is 5.3 (same as for the Kernel).

make clean
make ARCH=arm CROSS_COMPILE=aarch64-linux-gnu- PLAT=sun50iw1p1 bl31

This creates build/sun50iw1p1/release/bl31.bin which will be picked up from there later when merging U-Boot.

Sunxi pack tools

The pack tools are part of the BSP packge, but i split them into a separate repository so they can be easily used and retrieved when needed. As these tools run on your build system, no cross compiling is required. Put them into build-bine64-image/sunxi-pack-tools to be compatible with the scripts.

git clone https://github.com/longsleep/sunxi-pack-tools.git sunxi-pack-tools
make -C sunxi-pack-tools

Merge U-Boot with other parts

To make boot0 accept and boot U-Boot, it needs to be correctly prefixed and extended with the ATF.

In addition some blobs, and the device tree are required to create this U-Boot bootloader format whre provided in the build-pine64-image/blobs directory). So have the ATF ready and compiled in build-pine64-image/arm-trusted-firmware-pine64 and the Suxi pack tools compiled in build-pine64-image/sunxi-pack-tools.

./u-boot-postprocess.sh

This creates out/u-boot-with-dtb.bin which is correctly prefixed, combined with ATF and FTD wich makes it acceptable for Allwinner's boot0.

Next steps

Now that you have the boot loader, you actually can create a disk image with it. See the simpleimage folder. Copy the created out/u-boot-with-dtb.bin file into the simpleimage folder to be used there.