Emerson ATCA-F120 Installation And Use Manual page 104

U-Boot Firmware
saveenv
7. Boot Linux by entering:
boot
5.3.2 Configuring U-Boot to Boot from RAM Disk
You can configure U-Boot to boot from a RAM disk. In order to do this, proceed as follows.
Procedure
If you have the Linux kernel and a root file system available as a RAM disk image, then you may
want to boot from that RAM disk. In order to configure U-Boot accordingly, proceed as follows.
It is assumed that the RAM disk image is stored on an external TFTP server which is connected
to the ATCA-F120. During each boot process, the RAM disk image will be downloaded from the
TFTP server into the main memory of the ATCA-F120. Furthermore it is assumed that the U-
Boot command ramboot has previously been defined. Refer to the U-Boot documentation for
details.
The external TFTP server must be connected via the ATCA-F120 face plate connector "BBP
ETH", which is the Ethernet management interface. Any other interfaces, such as base or fabric
interfaces, are not yet functional at this stage of the boot phase, as the corresponding drivers
are not initialized yet.
1. Connect to U-boot as described in
101.
2. Specify the IP address of the ATCA-F120 itself and of the TFTP server which contains
the RAM disk image file by entering the following U-Boot commands:.
setenv ipaddr <IP address of ATCA-F120>
setenv serverip <IP address of TFTP server>
3. Depending on your network configuration, you may have to specify a gateway IP
address as well as a netmask. To do so, use the following commands:
setenv gatewyip <gateway IP>
setenv netmask <netmask>
104
Accessing U-Boot via the Serial Console on page
ATCA-F120 Installation and Use (6806800D06F)