U-Boot for Amlogic P200 (S905)
P200 is a reference board manufactured by Amlogic with the following specification:
Amlogic S905 ARM Cortex-A53 quad-core SoC @ 1.5GHz
ARM Mali 450 GPU
2GB DDR3 SDRAM
Gigabit Ethernet
HDMI 2.0 4K/60Hz display
2x USB 2.0 Host
eMMC, microSD
Infrared receiver
SDIO WiFi Module
CVBS + Stereo Audio Jack
Schematics are available from Amlogic on demand.
U-Boot Compilation
$ export CROSS_COMPILE=aarch64-none-elf-
$ make p200_defconfig
$ make
U-Boot Signing with Pre-Built FIP repo
$ git clone https://github.com/LibreELEC/amlogic-boot-fip --depth=1
$ cd amlogic-boot-fip
$ mkdir my-output-dir
$ ./build-fip.sh p200 /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:
$ 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 gxb_p200_v1_defconfig
$ make
$ export FIPDIR=$PWD/fip
Go back to the mainline U-Boot source tree then:
$ mkdir fip
$ cp $FIPDIR/gxb/bl2.bin fip/
$ cp $FIPDIR/gxb/acs.bin fip/
$ cp $FIPDIR/gxb/bl21.bin fip/
$ cp $FIPDIR/gxb/bl30.bin fip/
$ cp $FIPDIR/gxb/bl301.bin fip/
$ cp $FIPDIR/gxb/bl31.img fip/
$ cp u-boot.bin fip/bl33.bin
$ wget https://github.com/LibreELEC/amlogic-boot-fip/raw/master/nanopi-k2/bl1.bin.hardkernel fip/bl1.bin.hardkernel
$ chmod +x fip/bl1.bin.hardkernel
$ wget https://github.com/LibreELEC/amlogic-boot-fip/raw/master/nanopi-k2/aml_chksum fip/aml_chksum
$ chmod +x fip/aml_chksum
$ $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
$ python $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/fip_create --bl30 fip/bl30_new.bin \
--bl31 fip/bl31.img \
--bl33 fip/bl33.bin \
fip/fip.bin
$ cat fip/bl2_new.bin fip/fip.bin >fip/boot_new.bin
$ $FIPDIR/gxb/aml_encrypt_gxb --bootsig \
--input fip/boot_new.bin \
--output fip/u-boot.bin
and then write the image to SD with:
$ DEV=/dev/boot_device
$ dd if=fip/u-boot.bin of=fip/u-boot.bin.gxbb bs=512 conv=fsync
$ dd if=fip/u-boot.bin of=fip/u-boot.bin.gxbb bs=512 seek=9 skip=8 count=87 conv=fsync,notrunc
$ dd if=/dev/zero of=fip/u-boot.bin.gxbb bs=512 seek=8 count=1 conv=fsync,notrunc
$ dd if=bl1.bin.hardkernel of=fip/u-boot.bin.gxbb bs=512 seek=2 skip=2 count=1 conv=fsync,notrunc
$ ./aml_chksum fip/u-boot.bin.gxbb
$ dd if=fip/u-boot.gxbb of=$DEV conv=fsync,notrunc bs=512 skip=1 seek=1
$ dd if=fip/u-boot.gxbb of=$DEV conv=fsync,notrunc bs=1 count=440