U-Boot for Khadas VIM2¶
Khadas VIM2 is an Open Source DIY Box manufactured by Shenzhen Wesion Technology Co., Ltd with the following specifications:
Amlogic S912 ARM Cortex-A53 octo-core SoC @ 1.5GHz
ARM Mali T860 GPU
2/3GB DDR4 SDRAM
10/100/1000 Ethernet
HDMI 2.0 4K/60Hz display
40-pin GPIO header
2 x USB 2.0 Host, 1 x USB 2.0 Type-C OTG
16GB/32GB/64GB eMMC
2MB SPI Flash
microSD
SDIO Wifi Module, Bluetooth
Two channels IR receiver
U-Boot compilation¶
$ export CROSS_COMPILE=aarch64-none-elf-
$ make khadas-vim2_defconfig
$ make
Image creation¶
For simplified usage, pleaser refer to Pre-Generated FIP file set with codename khadas-vim2
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/khadas/u-boot -b khadas-vim-v2015.01 vim-u-boot
$ cd vim-u-boot
$ make kvim2_defconfig
$ make
$ export FIPDIR=$PWD/fip
Go back to mainline U-Boot source tree then :
$ mkdir fip
$ cp $FIPDIR/gxl/bl2.bin fip/
$ cp $FIPDIR/gxl/acs.bin fip/
$ cp $FIPDIR/gxl/bl21.bin fip/
$ cp $FIPDIR/gxl/bl30.bin fip/
$ cp $FIPDIR/gxl/bl301.bin fip/
$ cp $FIPDIR/gxl/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
$ 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/gxl/aml_encrypt_gxl --bl3enc --input fip/bl30_new.bin
$ $FIPDIR/gxl/aml_encrypt_gxl --bl3enc --input fip/bl31.img
$ $FIPDIR/gxl/aml_encrypt_gxl --bl3enc --input fip/bl33.bin
$ $FIPDIR/gxl/aml_encrypt_gxl --bl2sig --input fip/bl2_new.bin --output fip/bl2.n.bin.sig
$ $FIPDIR/gxl/aml_encrypt_gxl --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
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