ZYNQ 从nand启动Linux系统、烧写总是失败？

我用矿机板子4205想从NAND启动Linux系统、可是在下载的时候出了问题、、

要么提示

要么就提示：

CortexA9 Processor Configuration# F2 {0 ^" q  ]1 U% B9 G* K
-------------------------------------. B1 r9 |- o" v# x
Version.............................0x00000003+ s/ `+ t7 }* Y. Z+ Q1 U2 N7 d
User ID.............................0x00000000
, l' Z% ]$ |$ }& \( k  J, sNo of PC Breakpoints................68 ^' K* V% k" `6 [9 l/ j
No of Addr/Data Watchpoints.........4! M; m" n/ a9 s
Processor Reset .... DONE
- D( G1 ?- H, KProcessor Reset .... DONE
+ r, D, V6 f- ~. A. L/ \5 FPrompt timeout.
  C) y" X& _1 q9 fProblem in running uboot
( f+ H; ?' Z' \3 V9 n. Y  rIntialization of XMD failed.

ERROR: Flash Operation Failed

有没有大佬知道原因？