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分享是一種喜悅、更是一種幸福

掌機 - Miyoo - BROM Boot Header

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參考資訊：
https://linux-sunxi.org/EGON

格式如下：

Bytes	Content
4	Instruction
8	Magic "eGON.BT0"
4	Checksum
4	Length
4	SPL Signature
4	FEL Script Address
4	FEL uEnv Length
4	DT Name Offset
4	Reserved
4	Boot Media
4+	String Pool

XBoot範例：

    .global _start
_start:
    ; Boot head information for BROM
    ; 0x40 - boot params
    ; 0x58 - fel boot type
    ; 0x5c - dram size
    .long 0xea000016
    .byte 'e', 'G', 'O', 'N', '.', 'B', 'T', '0' 
    .long __spl_checksum
    .long __spl_size
    .byte 'S', 'P', 'L', 2
    .long 0
    .long 0
    .long 0, 0, 0, 0, 0, 0, 0, 0
    .long 0, 0, 0, 0, 0, 0, 0, 0

_vector:
    b reset
    ldr pc, _undefined_instruction
    ldr pc, _software_interrupt
    ldr pc, _prefetch_abort
    ldr pc, _data_abort
    ldr pc, _not_used
    ldr pc, _irq
    ldr pc, _fiq