我已经在 linux-sunxi.org 网站找到了SD卡启动流程！！！
资料查找顺序：
linux-sunxi.org -> Community -> linux-sunxi community page -> Category:Community -> 2.1 Bring up your own hardware -> attempting to identify your hardware -> 3.1 Boards -> H5 Boards -> 根据自己的型号选择 -> Manual build -> Manual build howto ->Set up SD-Card for booting