diff options
Diffstat (limited to 'board/amlogic/p212/README.libretech-cc')
| -rw-r--r-- | board/amlogic/p212/README.libretech-cc | 41 |
1 files changed, 37 insertions, 4 deletions
diff --git a/board/amlogic/p212/README.libretech-cc b/board/amlogic/p212/README.libretech-cc index d007f58764d..6af7de3cfa7 100644 --- a/board/amlogic/p212/README.libretech-cc +++ b/board/amlogic/p212/README.libretech-cc @@ -38,9 +38,28 @@ U-Boot compilation Image creation ============== -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: +To boot the system, u-boot must be combined with several earlier stage +bootloaders: + +* bl2.bin: vendor-provided binary blob +* bl21.bin: built from vendor u-boot source +* bl30.bin: vendor-provided binary blob +* bl301.bin: built from vendor u-boot source +* bl31.bin: vendor-provided binary blob +* acs.bin: built from vendor u-boot source + +These binaries and the tools required below have been collected and prebuilt +for convenience at <https://github.com/BayLibre/u-boot/releases/> + +Download and extract the libretech-cc release from there, and set FIPDIR to +point to the `fip` subdirectory. + + > export FIPDIR=/path/to/extracted/fip + +Alternatively, you can obtain the original vendor u-boot tree which +contains the required blobs and sources, and build yourself. +Note that old compilers are required for this to build. The compilers here +are suggested by Amlogic, and they are 32-bit x86 binaries. > 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 @@ -53,7 +72,10 @@ the git tree published by the board vendor: > make > export FIPDIR=$PWD/fip -Go back to mainline U-Boot source tree then : +Once you have the binaries available (either through the prebuilt download, +or having built the vendor u-boot yourself), you can then proceed to glue +everything together. Go back to mainline U-Boot source tree then : + > mkdir fip > cp $FIPDIR/gxl/bl2.bin fip/ @@ -100,3 +122,14 @@ and then write the image to SD with: > DEV=/dev/your_sd_device > dd if=fip/u-boot.bin.sd.bin of=$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 + +Note that Amlogic provides aml_encrypt_gxl as a 32-bit x86 binary with no +source code. Should you prefer to avoid that, there are open source reverse +engineered versions available: + +1. gxlimg <https://github.com/repk/gxlimg>, which comes with a handy + Makefile that automates the whole process. +2. meson-tools <https://github.com/afaerber/meson-tools> + +However, these community-developed alternatives are not endorsed by or +supported by Amlogic. |