The flatheadbro from ouyancheng

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A baremetal experiment of Allwinner D1, without FEL

CMake 4.23% C 25.02% Python 1.00% Assembly 69.54% C++ 0.21%

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Why does the boot0-header definition is sligtly different from sunxi's official definition?

Thank you a lot for your work! I learned from your repository. But I found that the boot0-header definition differs from SUNXI's official one as illustrated in https://linux-sunxi.org/EGON. Is there any customized modification because this is a RISC-V chip?

The official one says that the BT0 is something like this

But the definition in your repo is

/******************************************************************************/
/*                              file head of Boot                             */
/******************************************************************************/
typedef struct _Boot_file_head {
    uint32_t  jump_instruction;   /* one intruction jumping to real code */
    uint8_t   magic[MAGIC_SIZE];  /* ="eGON.BT0" */
    uint32_t  check_sum;          /* generated by PC */
    uint32_t  length;             /* generated by PC */
    uint32_t  pub_head_size;      /* the size of boot_file_head_t */
    uint8_t   pub_head_vsn[4];    /* the version of boot_file_head_t */
    uint32_t  ret_addr;           /* the return value */
    uint32_t  run_addr;           /* run addr */
    uint32_t  boot_cpu;           /* eGON version */
    uint8_t   platform[8];        /* platform information */
} boot_file_head_t;

And because of my lack of embedded system development experience, I cannot find a similar definition in the official u-boot repository https://github.com/smaeul/u-boot. So could you please tell me where did you get the public header layout?

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