uEnv.txt

go_boot=setenv bootargs "console=ttyPS0,115200 log_buf_len=131072 rootwait panic=10 ${vmopt} root=${rootdev}" && bootz 0x02000000 - 0x02A00000

chk_model=mw.b 0x08000000 0xe0 1 && cmp.b 0x08000000 0xe000a064 1 && setenv ymodel 1r;\
          mw.b 0x08000000 0xe1 1 && cmp.b 0x08000000 0xe000a064 1 && setenv ymodel 2l && setenv vmopt "vmalloc=600MB"

set_sddev=if fatinfo mmc 0;then setenv sddev 0;\
        elif fatinfo mmc 1;then setenv sddev 1;\
        else                    setenv sddev x;\
          fi;\
        echo boot device is mmc ${sddev}

set_root=setenv rootdev "/dev/mmcblk${sddev}p2"

ld_img=fatload mmc ${sddev}:1 0x02000000 /zImage
ld_dtb=fatload mmc ${sddev}:1 0x02A00000 /f3rp7x_${ymodel}.dtb && echo dtb is f3rp7x_${ymodel}.dtb

autoboot=sf probe 0 0 0;run chk_model;run set_sddev;run set_root;run ld_img;run ld_dtb;run go_boot