U-Boot has more than 60 configurable commands. These are summarized here in Table B-1 from a recent U-Boot snapshot. In addition to these are a large number of nonstandard commands, some of which depend on specific hardware or are experimental. For the complete and up-to-date listing, consult the source code. The commands are defined in the .../include/cmd_confdefs.h header file from the top-level U-Boot source directory.
Table B-1. U-Boot Configurable Commands
| Command Set | Commands |
|---|---|
| CFG_CMD_BDI | bdinfo |
| CFG_CMD_LOADS | loads |
| CFG_CMD_LOADB | loadb |
| CFG_CMD_IMI | iminfo |
| CFG_CMD_CACHE | icache, dcache |
| CFG_CMD_FLASH | flinfo, erase, protect |
| CFG_CMD_MEMORY | md, mm, nm, mw, cp, cmp, crc, base, loop, mtest |
| CFG_CMD_NET | bootp, tftpboot, rarpboot |
| CFG_CMD_ENV | saveenv |
| CFG_CMD_KGDB | kgdb |
| CFG_CMD_PCMCIA | PCMCIA support |
| CFG_CMD_IDE | IDE hard disk support |
| CFG_CMD_PCI | pciinfo |
| CFG_CMD_IRQ | irqinfo |
| CFG_CMD_BOOTD | bootd |
| CFG_CMD_CONSOLE | coninfo |
| CFG_CMD_EEPROM | EEPROM read/write support |
| CFG_CMD_ASKENV | ask for environment variable |
| CFG_CMD_RUN | run command in environment variable |
| CFG_CMD_ECHO | echo arguments |
| CFG_CMD_I2C | I2C serial bus support |
| CFG_CMD_REGINFO | Register dump |
| CFG_CMD_IMMAP | IMMR dump support |
| CFG_CMD_DATE | Support for RTC, date/time, and so on. |
| CFG_CMD_DHCP | DHCP support |
| CFG_CMD_BEDBUG | Includes BedBug debugger |
| CFG_CMD_FDC | Floppy disk support |
| CFG_CMD_SCSI | SCSI support |
| CFG_CMD_AUTOSCRIPT | Autoscript support |
| CFG_CMD_MII | MII support |
| CFG_CMD_SETGETDCR | DCR support on 4xx |
| CFG_CMD_BSP | Board-specific functions |
| CFG_CMD_ELF | ELF (VxWorks) load/boot command |
| CFG_CMD_MISC | Miscellaneous functions, such as sleep |
| CFG_CMD_USB | USB support |
| CFG_CMD_DOC | Disk-on-chip support |
| CFG_CMD_JFFS2 | JFFS2 support |
| CFG_CMD_DTT | Digital therm and thermostat |
| CFG_CMD_SDRAM | SDRAM DIMM SPD info printout |
| CFG_CMD_DIAG | Diagnostics |
| CFG_CMD_FPGA | FPGA configuration support |
| CFG_CMD_HWFLOW | RTS/CTS hardware flow control |
| CFG_CMD_SAVES | Saves S record dump |
| CFG_CMD_SPI | SPI utility |
| CFG_CMD_FDOS | Floppy DOS support |
| CFG_CMD_VFD | VFD support (TRAB) |
| CFG_CMD_NAND | NAND support |
| CFG_CMD_BMP | BMP support |
| CFG_CMD_PORTIO | Port I/O |
| CFG_CMD_PING | Ping support |
| CFG_CMD_MMC | MMC support |
| CFG_CMD_FAT | FAT support |
| CFG_CMD_IMLS | Lists all found images |
| CFG_CMD_ITEST | Integer (and string) test |
| CFG_CMD_NFS | NFS support |
| CFG_CMD_REISER | Reiserfs support |
| CFG_CMD_CDP | Cisco Discovery Protocol |
| CFG_CMD_XIMG | Loads part of multi-image |
| CFG_CMD_UNIVERSE | Tundra Universe support |
| CFG_CMD_EXT2 | EXT2 support |
| CFG_CMD_SNTP | SNTP support |
| CFG_CMD_DISPLAY | Display support |