UM0844 datasheet(34/43 Pages) STMICROELECTRONICS

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Working with customized kernels

UM0844

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Doc ID 16544 Rev 3

service tftp

{

socket_type

= dgram

protocol

= udp

wait

= yes

user

= root

server

= /usr/sbin/in.tftpd

server_args

= -c -v -s /tftpboot

disable

= no

per_source

= 11

cps

= 100 2

flags

= IPv4

}

Also, make sure that the /tftpboot directory exists and is world-readable (permissions at

least "dr-xr-xr-x"), and remember to disable the firewall if present (or make new rules to

allow TFTP traffic).

The firewall can be disabled as in the following example command:

# /etc/init.d/iptables stop

Please note that server_args keeps the default search path for TFTP daemon. It is quite

useful since on TFTP client side (target) we can specify file names omitting this path. After

that you need to restart the xinetd daemon to force it to reload the new configuration. You

need to type the following command from host PC prompt:

# service xinetd restart

Stopping xinetd: [OK]

Starting xinetd: [OK]

5.3.2

Updating the kernel on Flash memory by U-Boot

You can use U-Boot and TFTP transfer to write on Flash memory a new kernel image.

For example, use the following procedure to update the kernel on serial NOR Flash for the

SPEAR300EVAL evaluation board:

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