m4image=imx6sx_sdb_m4.bin
mmcdev=2
mmcpart=1
loadaddr=0x80800000
loadm4image=fatload mmc ${mmcdev}:${mmcpart} ${loadaddr} ${m4image}

### flashing
if sf probe 1:0; then
    if run loadm4image; then
        setexpr fw_sz ${filesize} + 0xffff; setexpr fw_sz ${fw_sz} / 0x10000; setexpr fw_sz ${fw_sz} * 0x10000; sf erase 0x0 ${fw_sz}; sf write ${loadaddr} 0x0 ${filesize};
    fi;
fi

### booting
sf probe 1:0; cp 0x78000000 0x007F8000 8; mw.l 0x020D8000 0xA0480529;