[U-Boot] [PATCH v4 4/6] rockchip: rk3399: Get bl31.elf via BL31

[Kever Yang]

Hi Jagan:


On 06/20/2019 06:07 PM, Jagan Teki wrote:
> Right now rockchip platform need to copy bl31.elf into u-boot
> source directory to make use of building u-boot.itb.
>
> So, add environment variable BL31 like Allwinner SoC so-that the
> bl31.elf would available via BL31.
>
> If the builds are not exporting BL31 env, the make_fit_atf.py
> explicitly create dummy bl31.elf in u-boot root directory to
> satisfy travis builds and it will show the warning on console as
>
>  WARNING: BL31 file bl31.elf NOT found, resulting binary is non-functional
>  WARNING: Please read Building section in doc/README.rockchip
>
> Note, that the dummy bl31 files were created during not exporting
> BL31 case would be removed via clean target in Makefile.
>
> Signed-off-by: Jagan Teki <jagan at amarulasolutions.com>
> ---
>  Makefile                               |  2 +-
>  arch/arm/mach-rockchip/make_fit_atf.py | 20 ++++++++++++++++++--
>  doc/README.rockchip                    |  4 ++--

Reviewed-by: Kever Yang <kever.yang at rock-chips.com>

Thanks,
- Kever
>  3 files changed, 21 insertions(+), 5 deletions(-)
>
> diff --git a/Makefile b/Makefile
> index a503ab9fc1..3ede10ff68 100644
> --- a/Makefile
> +++ b/Makefile
> @@ -1848,7 +1848,7 @@ clean: $(clean-dirs)
>  		-o -name 'dsdt.aml' -o -name 'dsdt.asl.tmp' -o -name 'dsdt.c' \
>  		-o -name '*.efi' -o -name '*.gcno' -o -name '*.so' \) \
>  		-type f -print | xargs rm -f \
> -		bl31_*.bin image.map
> +		bl31.c bl31.elf bl31_*.bin image.map
>  
>  # mrproper - Delete all generated files, including .config
>  #
> diff --git a/arch/arm/mach-rockchip/make_fit_atf.py b/arch/arm/mach-rockchip/make_fit_atf.py
> index 212bd0a854..e7d3846a13 100755
> --- a/arch/arm/mach-rockchip/make_fit_atf.py
> +++ b/arch/arm/mach-rockchip/make_fit_atf.py
> @@ -12,6 +12,7 @@
>  import os
>  import sys
>  import getopt
> +import logging
>  
>  # pip install pyelftools
>  from elftools.elf.elffile import ELFFile
> @@ -89,13 +90,17 @@ def append_conf_section(file, cnt, dtname, segments):
>      file.write('\t\tconfig_%d {\n' % cnt)
>      file.write('\t\t\tdescription = "%s";\n' % dtname)
>      file.write('\t\t\tfirmware = "atf_1";\n')
> -    file.write('\t\t\tloadables = "uboot",')
> +    file.write('\t\t\tloadables = "uboot"')
> +    if segments != 0:
> +        file.write(',')
>      for i in range(1, segments):
>          file.write('"atf_%d"' % (i))
>          if i != (segments - 1):
>              file.write(',')
>          else:
>              file.write(';\n')
> +    if segments == 0:
> +        file.write(';\n')
>      file.write('\t\t\tfdt = "fdt_1";\n')
>      file.write('\t\t};\n')
>      file.write('\n')
> @@ -171,8 +176,19 @@ def generate_atf_binary(bl31_file_name):
>  
>  def main():
>      uboot_elf = "./u-boot"
> -    bl31_elf = "./bl31.elf"
> +    bl31_elf = os.path.isfile("./bl31.elf")
>      fit_its = sys.stdout
> +    if bl31_elf:
> +        bl31_elf = "./bl31.elf"
> +    elif "BL31" in os.environ:
> +        bl31_elf=os.getenv("BL31");
> +    else:
> +        os.system("echo 'int main(){}' > bl31.c")
> +        os.system("${CROSS_COMPILE}gcc -c bl31.c -o bl31.elf")
> +        bl31_elf = "./bl31.elf"
> +        logging.basicConfig(format='%(levelname)s:%(message)s', level=logging.DEBUG)
> +        logging.warning(' BL31 file bl31.elf NOT found, resulting binary is non-functional')
> +        logging.warning(' Please read Building section in doc/README.rockchip')
>  
>      opts, args = getopt.getopt(sys.argv[1:], "o:u:b:h")
>      for opt, val in opts:
> diff --git a/doc/README.rockchip b/doc/README.rockchip
> index 264f7e4994..5680c075fa 100644
> --- a/doc/README.rockchip
> +++ b/doc/README.rockchip
> @@ -149,8 +149,8 @@ For example:
>  	=> make realclean
>  	=> make CROSS_COMPILE=aarch64-linux-gnu- PLAT=rk3399
>  
> -	(copy bl31.elf into U-Boot root dir)
> -	=> cp build/rk3399/release/bl31/bl31.elf /path/to/u-boot
> +	(export bl31.elf)
> +	=> export BL31=/path/to/arm-trusted-firmware/build/rk3399/release/bl31/bl31.elf
>  
>     - Compile PMU M0 firmware
>