UM0851 datasheet(16/245 Pages) STMICROELECTRONICS

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Boot loader overview

UM0851

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Doc ID 16604 Rev 2

# make

/* Build U-Boot for SPEAr320 target */

# make spear320_config

Generating include/autoconf.mk

Configuring for spear320 board...

# make

The U-Boot source can be compiled with various options, which are listed below:

●

make CONSOLE=USB: This option generates firmware binary image (containing TTY

over USB driver) to be downloaded for the operation of the Flashing Utility (refer to the

Section 11: Flashing utility section).This option is available for SPEAr3xx and

SPEAr600.

●

make ENV=NAND: This option generates U-Boot/firmware image which saves

environment variables in NAND device. This option is available for SPEAr3xx and

SPEAr600.

●

make FLASH=PNOR: This option generates an image that supports parallel NOR in

place of serial NOR Flash drivers. It is applicable only for SPEAr310.

1.2.4

U-Boot commands

You can display the complete list of U-Boot commands using the 'help' command.

spear600> help

- alias for 'help'

autoscr - run script from memory

base

- print or set address offset

bdinfo

- print Board Info structure

boot

- boot default, for example, run 'bootcmd'

bootd

- boot default, for example, run 'bootcmd'

bootm

- boot application image from memory

bootp

- boot image via network using BootP/TFTP protocol

cdp

- Perform CDP network configuration

cmp

- memory compare

coninfo - print console devices and information

- memory copy

crc32

- checksum calculation

dhcp

- invoke DHCP client to obtain IP/boot params

echo

- echo args to console

erase

- erase FLASH memory

flinfo

- print FLASH memory information

- start application at address 'addr'

help

- print online help

i2c

- I2C sub-system

iminfo

- print header information for application image

imls

- list all images found in flash

itest

- return true/false on integer compare

loadb

- load binary file over serial line (kermit mode)

loads

- load S-Record file over serial line

loady

- load binary file over serial line (ymodem mode)

loop

- infinite loop on address range

- memory display

- memory modify (auto-incrementing)

mtest

- simple RAM test

- memory write (fill)

nand

- NAND sub-system

nboot

- boot from NAND device

nfs

- boot image via network using NFS protocol

- memory modify (constant address)

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