Artesyn COMX-P2020 BSP User Guide (July 2014) - Manual (Page 47)

U-boot Deployment
COMX-P2020 BSP User Guide (6806800L84B) 47
mmc - MMC sub system
mmcinfo - mmcinfo <dev num>-- display MMC info
mtest - simple RAM read/write test
mw - memory write (fill)
nfs - boot image via network using NFS protocol
nm - memory modify (constant address)
pci - list and access PCI Configuration Space
ping - send ICMP ECHO_REQUEST to network host
printenv- print environment variables
rarpboot- boot image via network using RARP/TFTP protocol
reset - Perform RESET of the CPU
run - run commands in an environment variable
saveenv - save environment variables to persistent storage
sensor - LM75 Sensor
setenv - set environment variables
setexpr - set environment variable as the result of eval expression
sf - SPI flash sub-system
showvar - print local hushshell variables
sleep - delay execution for some time
source - run script from memory
test - minimal test like /bin/sh
tftpboot- boot image via network using TFTP protocol
usb - USB sub-system
usbboot - boot from USB device
version - print monitor version
wdg - setting watchdog
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Most of the displayed commands were inherited from U-boot.