[U-Boot-Users] why disable icache when erase syncflash in mx1ads

[齐尧]

 just now,i get the latest u-boot ,it has supported mx1ads,but i can not understand the code as follows,in board/mx1ads/flash.c:
int flash+AF8-erase (flash+AF8-info+AF8-t  +ACo- info, int first,int last) 
+AHs-
    ...............
    icache+AF8-disable()+ADs-
    .............
+AH0-

I do nto know why disable the icache before erasing the Flash+ACE-
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