• Bin Meng's avatar
    x86: qemu: Add a config for 64-bit U-Boot · bda40d56
    Bin Meng authored
    Add a new board config which uses 64-bit U-Boot. Supported features
    are the same as the other 64-bit board (Google Chromebook Link).
    It is a start for us to test 64-bit U-Boot easily without the need
    to access a real hardware.
    
    Note CONFIG_SPL_ENV_SUPPORT is required for QEMU 64-bit as without
    this the SPL build fails at the end. This is just a workaround as
    CONFIG_SPL_ENV_SUPPORT is not needed at all.
    
    common/built-in.o:(.data.env_htab+0xc): undefined reference to 'env_flags_validate'
    lib/built-in.o: In function `hsearch_r':
    lib/hashtable.c:380: undefined reference to 'env_callback_init'
    lib/hashtable.c:382: undefined reference to 'env_flags_init'
    make[1]: *** [spl/u-boot-spl] Error 1
    
    Except those SPL options required by 64-bit, compared to 32-bit
    config, the following options are different:
    
    - CONFIG_SYS_MALLOC_F_LEN has to be increased to 0x1000 for SPL.
    - CONFIG_DEBUG_UART has to be included due to the weird issue.
      See TODO comments in arch/x86/cpu/x86_64/cpu.c:arch_setup_gd().
      Once this issue gets fixed, debug uart can be optional.
    Signed-off-by: 's avatarBin Meng <bmeng.cn@gmail.com>
    Reviewed-by: 's avatarSimon Glass <sjg@chromium.org>
    bda40d56
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