User manual

U-Boot for MPL SBC
User Manual
 2003 by MPL AG
7
MEH-10082-002 Rev. D
High-Tech • Made in Switzerland
3.2 U-Boot Command Interface
3.2.1 Help system
If you type
help on the U-Boot prompt, you get a list with all possible commands for your board. Please note that the
commands may be abbreviated, as long as the command can be clearly identified. Since the development of the U-Boot
is still going on, following list represents only the version 0.3.2 for the PIP405 of the U-Boot:
=> help
autoscr - run script from memory
base - print or set address offset
bdinfo - print Board Info structure
bootelf - Boot from an ELF image in memory
bootm - boot application image from memory
bootp - boot image via network using BootP/TFTP protocol
bootvx - Boot vxWorks from an ELF image
bootd - boot default, i.e., run 'bootcmd'
cmp - memory compare
coninfo - print console devices and information
cp - memory copy
crc32 - checksum calculation
date - get/set/reset date & time
dcache - enable or disable data cache
dhcp - invoke DHCP client to obtain IP/boot params
diskboot- boot from IDE device
docboot - boot from DOC device
doc - Disk-On-Chip sub-system
echo - echo args to console
eeprom - EEPROM sub-system
erase - erase FLASH memory
fdcboot - boot from floppy device
flinfo - print FLASH memory information
getdcr - Get an IBM PPC 4xx DCR's value
go - start application at address 'addr'
help - print online help
icache - enable or disable instruction cache
imd - i2c memory display
imm - i2c memory modify (auto-incrementing)
inm - memory modify (constant address)
imw - memory write (fill)
in - read data from an IO port
icrc32 - checksum calculation
iprobe - probe to discover valid I2C chip addresses
iloop - infinite loop on address range
isdram - print SDRAM configuration information
ide - IDE sub-system
iminfo - print header information for application image
irqinfo - print information about IRQs
loadb - load binary file over serial line (kermit mode)
loads - load S-Record file over serial line
loop - infinite loop on address range
md - memory display
mii - MII utility commands
mm - memory modify (auto-incrementing)
mtest - simple RAM test
mw - memory write (fill)
nm - memory modify (constant address)
out - write datum to IO port
pci - list and access PCI Configuraton Space
printenv- print environment variables
protect - enable or disable FLASH write protection
rarpboot- boot image via network using RARP/TFTP protocol
reginfo - print register information
reset - Perform RESET of the CPU
run - run commands in an environment variable
saveenv - save environment variables to persistent storage
saves - save S-Record file over serial line
scsiboot- boot from SCSI device
scsi - SCSI sub-system
setdcr - Set an IBM PPC 4xx DCR's value
setenv - set environment variables