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Is OPTEE_OS for Juno using 32-bit arch or 64-bit arch?

Shengye Wan

Hi experts,

 

I'm wondering do you compile the OPTEE_OS in this instruction as arm32 or AArch64? In which script do you set the compiler for the secure OS? ( I checked the file build-optee-os.sh while I find the file exports both compilers so I'm not sure which one is used for compiling OPTEE_OS actually.)

Also, if it's still using 32-bit architecture, is it possible for me to compile the secure OS as 64-bit OS to access entire DRAM address?

Thank you.

  • +1
    It depends on whether you build with ARM64 enabled or not.
    For HiKey board example, it you want to build optee-os for AArch64
    $make PLATFORM=hikey CFG_ARM64_core=y

    It will build for AArch32 by default.
    $make PLATFORM=hikey

    CFG_ARM64_core=y will define "-DARM64" for bare-mental code.
    For optee linux driver, it has a separate build option: CONFIG_ARM64=y