GM # help
?       - alias for 'help'
boot    - boot default, i.e., run 'bootcmd'
bootd   - boot default, i.e., run 'bootcmd'
bootlogo- show lcd bootlogo
bootm   - boot application image from memory
bootp   - boot image via network using BOOTP/TFTP protocol
chpart  - change active partition
cmp     - memory compare
cp      - memory copy
crc32   - checksum calculation
dcache  - enable or disable data cache
env     - environment handling commands
erase   - erase FLASH memory
fatinfo - print information about filesystem
fatload - load binary file from a dos filesystem
fatls   - list files in a directory (default /)
flinfo  - print FLASH memory information
fwupd   - firmware upgrade from usb device for specified filename
go      - start application at address 'addr'
help    - print command description/usage
i2c     - I2C sub-system
icache  - enable or disable instruction cache
l2cache_test- Perform test of L2 cache
md      - memory display
memtester- memory tester
mii     - MII utility commands
mm      - memory modify (auto-incrementing address)
mmc     - MMC sub system
mmcinfo - display MMC info
mtdparts- define flash/nand partitions
mtest   - simple RAM read/write test
mw      - memory write (fill)
nm      - memory modify (constant address)
ping    - send ICMP ECHO_REQUEST to network host
printenv- print environment variables
protect - enable or disable FLASH write protection
reset   - Perform RESET of the CPU
run     - run commands in an environment variable
saveenv - save environment variables to persistent storage
setenv  - set environment variables
sf      - SPI flash sub-system
sspi    - SPI utility command
tftpboot- boot image via network using TFTP protocol
usb     - USB sub-system
usbboot - boot from USB device
version - print monitor, compiler and linker version

GM # printenv
auimg0=u-boot_spi.bin
auimg1=uImage_8136
auimg2=rootfs-cpio_8136.squashfs.img
auimg3=mtd.img
auimgaio=flash.img
auimgbot=nsboot.bin
autoupdate=no
baudrate=115200
bootcmd=sf probe 0:0;run lm;bootm 0x2000000
bootdelay=3
cmd1=mem=64M gmmem=30M console=ttyS0,115200 user_debug=31 init=/squashfs_init root=/dev/mtdblock2 rootfstype=squashfs
cmd2=mem=128M gmmem=90M console=ttyS0,115200 user_debug=31 init=/squashfs_init root=/dev/mtdblock2 rootfstype=squashfs
cmd3=mem=256M gmmem=190M console=ttyS0,115200 user_debug=31 init=/squashfs_init root=/dev/mtdblock2 rootfstype=squashfs
cmd4=mem=512M gmmem=432M console=ttyS0,115200 user_debug=31 init=/squashfs_init root=/dev/mtdblock2 rootfstype=squashfs
ethact=eth0
ethaddr=00:42:70:00:30:22
gatewayip=10.0.1.51
ipaddr=10.0.1.52
lm=sf read 0x02000000 z
netmask=255.0.0.0
serverip=10.0.1.51
stderr=serial
stdin=serial
stdout=serial
verify=no

Environment size: 933/65532 bytes

GM # help mmc
mmc - MMC sub system

Usage:
mmc read addr blk# cnt
mmc write addr blk# cnt
mmc erase blk# cnt
mmc rescan
mmc part - lists available partition on current mmc device
mmc dev [dev] [part] - show or set current mmc device [partition]
mmc list - lists available devices

GM # mmc part

Partition Map for MMC device 0  --   Partition Type: DOS

Part    Start Sector    Num Sectors    UUID        Type
  1    2048          1927168       a562df25-01    0c

GM # mmcinfo
Device: FTSDC021
Manufacturer ID: 3
OEM: 5344
Name: SU01G 
Tran Speed: 25000000
Rd Block Len: 512
SD version 2.0
High Capacity: No
Capacity: 942.5 MiB
Bus Width: 4-bit

sf probe 0:0;sf read 0x02000000 z;bootm 0x2000000