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.. SPDX-License-Identifier: GPL-2.0+
U-Boot for Amlogic S400 (A113X)
===============================
S400 is a reference board manufactured by Amlogic with the following specifications:
- Amlogic A113X ARM Cortex-A53 quad-core SoC @ 1.2GHz
- 1GB DDR4 SDRAM
- 10/100 Ethernet
- 2x USB 2.0 Host
- eMMC
- Infrared receiver
- SDIO WiFi Module
- MIPI DSI Connector
- Audio HAT Connector
- PCI-E M.2 Connectors
Schematics are available from Amlogic on demand.
U-Boot Compilation
------------------
.. code-block:: bash
$ export CROSS_COMPILE=aarch64-none-elf-
$ make s400_defconfig
$ make
U-Boot Signing with Pre-Built FIP repo
--------------------------------------
.. code-block:: bash
$ git clone https://github.com/LibreELEC/amlogic-boot-fip --depth=1
$ cd amlogic-boot-fip
$ mkdir my-output-dir
$ ./build-fip.sh s400 /path/to/u-boot/u-boot.bin my-output-dir
U-Boot Manual Signing
---------------------
Amlogic does not provide sources for the firmware and tools needed to create a bootloader
image but sources have been shared by Linux development contractor, Baylibre:
.. code-block:: bash
$ wget https://releases.linaro.org/archive/13.11/components/toolchain/binaries/gcc-linaro-aarch64-none-elf-4.8-2013.11_linux.tar.xz
$ wget https://releases.linaro.org/archive/13.11/components/toolchain/binaries/gcc-linaro-arm-none-eabi-4.8-2013.11_linux.tar.xz
$ tar xvfJ gcc-linaro-aarch64-none-elf-4.8-2013.11_linux.tar.xz
$ tar xvfJ gcc-linaro-arm-none-eabi-4.8-2013.11_linux.tar.xz
$ export PATH=$PWD/gcc-linaro-aarch64-none-elf-4.8-2013.11_linux/bin:$PWD/gcc-linaro-arm-none-eabi-4.8-2013.11_linux/bin:$PATH
$ git clone https://github.com/BayLibre/u-boot.git -b n-amlogic-openlinux-20170606 amlogic-u-boot
$ cd amlogic-u-boot
$ make axg_s400_v1_defconfig
$ make
$ export FIPDIR=$PWD/fip
Go back to mainline U-Boot source tree then :
.. code-block:: bash
$ mkdir fip
$ cp $FIPDIR/axg/bl2.bin fip/
$ cp $FIPDIR/axg/acs.bin fip/
$ cp $FIPDIR/axg/bl21.bin fip/
$ cp $FIPDIR/axg/bl30.bin fip/
$ cp $FIPDIR/axg/bl301.bin fip/
$ cp $FIPDIR/axg/bl31.img fip/
$ cp u-boot.bin fip/bl33.bin
$ $FIPDIR/blx_fix.sh \
fip/bl30.bin \
fip/zero_tmp \
fip/bl30_zero.bin \
fip/bl301.bin \
fip/bl301_zero.bin \
fip/bl30_new.bin \
bl30
$ $FIPDIR/acs_tool.pyc fip/bl2.bin fip/bl2_acs.bin fip/acs.bin 0
$ $FIPDIR/blx_fix.sh \
fip/bl2_acs.bin \
fip/zero_tmp \
fip/bl2_zero.bin \
fip/bl21.bin \
fip/bl21_zero.bin \
fip/bl2_new.bin \
bl2
$ $FIPDIR/axg/aml_encrypt_axg --bl3sig --input fip/bl30_new.bin \
--output fip/bl30_new.bin.enc \
--level v3 --type bl30
$ $FIPDIR/axg/aml_encrypt_axg --bl3sig --input fip/bl31.img \
--output fip/bl31.img.enc \
--level v3 --type bl31
$ $FIPDIR/axg/aml_encrypt_axg --bl3sig --input fip/bl33.bin --compress lz4 \
--output fip/bl33.bin.enc \
--level v3 --type bl33
$ $FIPDIR/axg/aml_encrypt_axg --bl2sig --input fip/bl2_new.bin \
--output fip/bl2.n.bin.sig
$ $FIPDIR/axg/aml_encrypt_axg --bootmk \
--output fip/u-boot.bin \
--bl2 fip/bl2.n.bin.sig \
--bl30 fip/bl30_new.bin.enc \
--bl31 fip/bl31.img.enc \
--bl33 fip/bl33.bin.enc --level v3
Then write U-Boot to SD or eMMC with:
.. code-block:: bash
$ DEV=/dev/boot_device
$ dd if=fip/u-boot.bin.sd.bin of=$DEV conv=fsync,notrunc bs=512 skip=1 seek=1
$ dd if=fip/u-boot.bin.sd.bin of=$DEV conv=fsync,notrunc bs=1 count=440
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