U-Boot for Amlogic S400¶
S400 is a reference board manufactured by Amlogic with the following specifications:
Amlogic A113DX ARM Cortex-A53 quad-core SoC @ 1.2GHz
1GB DDR4 SDRAM
10/100 Ethernet
2 x 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¶
$ export CROSS_COMPILE=aarch64-none-elf-
$ make s400_defconfig
$ make
Image creation¶
For simplified usage, pleaser refer to Pre-Generated FIP file set with codename s400
Amlogic doesn’t provide sources for the firmware and for tools needed to create the bootloader image, so it is necessary to obtain them from the git tree published by the board vendor:
$ 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 :
$ 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
and then write the image to SD with:
$ DEV=/dev/your_sd_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=444