sun4i# printenv
autoboot=run loadkernel && run setargs && true && bootm 0x48000000
baudrate=115200
boot_ram=saved_stdout=$stdout;setenv stdout nc;if iminfo 0x41000000; then true; setenv stdout $saved_stdout; source 0x41000000;else setenv stdout $saved_stdout;fi
bootcmd=if run loadbootenv; then echo Loaded environment from ${bootenv};env import -t ${scriptaddr} ${filesize};fi;if test -n "${uenvcmd}"; then echo Running uenvcmd ...;run uenvcmd;fi;if run loadbootscr; then echo Jumping to ${bootscr};source ${scriptaddr};fi;run autoboot;
bootdelay=3
bootenv=uEnv.txt
bootm_size=0x20000000
bootscr=boot.scr
console=ttyS0,115200
device=mmc
ethact=emac
kernel=uImage
loadbootenv=fatload $device $partition $scriptaddr ${bootenv} || ext2load $device $partition $scriptaddr boot/${bootenv} || ext2load $device $partition $scriptaddr ${bootenv}
loadbootscr=fatload $device $partition $scriptaddr ${bootscr} || ext2load $device $partition $scriptaddr boot/${bootscr} ||ext2load $device $partition $scriptaddr ${bootscr}
loadkernel=if bootpath=/boot/ && ext2load $device $partition 0x43000000 ${bootpath}${script} && ext2load $device $partition 0x48000000 ${bootpath}${kernel};then true; elif bootpath=/ && fatload $device $partition 0x43000000 ${script} && fatload $device $partition 0x48000000 ${kernel};then true; elif bootpath=/ && ext2load $device $partition 0x43000000 ${bootpath}${script} && ext2load $device $partition 0x48000000 ${bootpath}${kernel};then true; else false;fi
loglevel=8
panicarg=panic=10
partition=0:1
script=script.bin
scriptaddr=0x44000000
setargs=if test -z \\"$root\\"; then if test \\"$bootpath\\" = "/boot/"; then root="/dev/mmcblk0p1 rootwait"; else root="/dev/mmcblk0p2 rootwait"; fi; fi; setenv bootargs console=${console} root=${root} loglevel=${loglevel} ${panicarg} ${extraargs}
stderr=serial
stdin=serial
stdout=serial



U-Boot SPL 2014.04-rc2-10390-g96510e1-dirty (Mar 28 2014 - 20:48:00)
Board: Marsboard_A10
DRAM: 512 MiB
CPU: 1008000000Hz, AXI/AHB/APB: 3/2/2
SPL: Please implement spl_start_uboot() for your board
SPL: Direct Linux boot not active!


U-Boot 2014.04-rc2-10390-g96510e1-dirty (Mar 28 2014 - 20:48:00) Allwinner Techn                                                                                                                                                             ology

CPU:   Allwinner A10 (SUN4I)
Board: Marsboard_A10
I2C:   ready
DRAM:  512 MiB
MMC:   SUNXI SD/MMC: 0
*** Warning - bad CRC, using default environment

In:    serial
Out:   serial
Err:   serial
Net:   emac
Hit any key to stop autoboot:  0
reading uEnv.txt
** Unable to read file uEnv.txt **
Failed to mount ext2 filesystem...
** Unrecognized filesystem type **
Failed to mount ext2 filesystem...
** Unrecognized filesystem type **
reading boot.scr
** Unable to read file boot.scr **
Failed to mount ext2 filesystem...
** Unrecognized filesystem type **
Failed to mount ext2 filesystem...
** Unrecognized filesystem type **
Failed to mount ext2 filesystem...
** Unrecognized filesystem type **
reading script.bin
40072 bytes read in 5 ms (7.6 MiB/s)
reading uImage
5080752 bytes read in 265 ms (18.3 MiB/s)
## Booting kernel from Legacy Image at 48000000 ...
   Image Name:   Linux-3.4.61+
   Created:      2014-03-28  19:47:37 UTC
   Image Type:   ARM Linux Kernel Image (uncompressed)
   Data Size:    5080688 Bytes = 4.8 MiB
   Load Address: 40008000
   Entry Point:  40008000
   Verifying Checksum ... OK
   Loading Kernel Image ... OK

Starting kernel ...