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uboot.md

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Uboot

General commands

  • bdinfo - print Board Info structure
  • coninfo - print console devices and information
  • flinfo - print FLASH memory information
  • iminfo addr - Print header information for application image
  • crc address count [save_addr] - calculates CRC32
  • echo - echo arguments to console
  • reset - Perform RESET of the CPU
  • sleep - delay execution for some time
  • version - print monitor version
  • test - minimal test, like /bin/bash
  • autoscr - Run script from memory
  • bootm - Boot application image from memory
  • go - Start application at address addr

Memory

  • cmp [.b, .w, .l] addr1 addr2 count The cmp command tests of the contents of two memory areas and determines whether or not the contents of the two memory areas are identical or not. The command will either test the whole area as specified by the 3rd (count) argument or stop at the first difference if the count argument is not specified.

  • cp [.b, .w, .l] source target count memory copy

  • md [.b, .w, .l] address [# of objects] memory display

  • mm [.b, .w, .l] address memory modify (auto-incrementing address) The mm is a method to interactively modify memory contents. It will display the address and current contents and then prompt for user input. If you enter a legal hexadecimal number, this new value will be written to the address. Then the next address will be prompted. If you don't enter any value and just press Enter, then the contents of this address will remain unchanged. The command stops as soon as you enter any data that is not a hex number:

  • mtest [start [end [pattern [iterations]]]] simple RAM read/write test This tests writes to memory, thus modifying the memory contents. It will fail when applied to ROM or flash memory. This command may crash the system when the tested memory range includes areas that are needed for the operation of the U-Boot firmware (like exception vector code, or U-Boot's internal program code, stack or heap memory areas).

  • mw [.b, .w, .l] address value [count] memory write (fill)

  • nm [.b, .w, .l] address memory modify (constant address)

  • loop [.b, .w, .l] address number_of_objects infinite loop on address range

  • base - Print or set address offset

File System

  • fatinfo - Print info about a FAT FS
  • fatload - Load binary file from a FAT FS
  • fatls - List files in a FAT FS
  • fsinfo - Print info about JFFS2 FS
  • fsload - Load bin file from JFFS2FS
  • ls - List file in a JFFS@ FS

MMC

MMC

  • todo

USB

  • todo

Network

  • todo

Cache

  • todo

NAND Flash

  • nand - NAND sub-system control
  • nboot - Boot from NAND Device
  • cp - Memory copy
  • flinfo - Print flash memory information
  • erase - Erase flash memory
  • protect - Enable or disable flash write protection

Environment Variables Commands

  • printenv - Print env variables
  • saveenv - Save env variables to storage
  • run - Run commands in an env variable
  • bootd - Boot default