SMART Embedded Computing MVME2502, Installation And User Manual

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MVME2502 Installation and Use (6806800R96L) 119
Chapter 6
Boot System
6.1 Overview
The U-boot address is relocated near to the end of DRAM. The address of U-boot is not
fixed and it varies from release to release based on the type of changes done. It may also
change based on the type of devices that the user has populated on the board.
To get specific address, U-boot can be located within the top 8 megabytes of DRAM. The
user can use the U-boot command
bdinfo
to display a set of values which includes
determining the location of the U-boot.
The value
relocaddr
indicates the location of U-boot in DRAM.
The MVME2502 uses Das U-Boot, a boot loader software based on the GNU Public
License. It boots the blade and is the first software to be executed after the system is
powered on.
Its main functions are:

Initialize the hardware

Pass boot parameters to the Linux kernel

Start the Linux kernel

Update Linux kernel and U-Boot images
The below sections describe U-Boot features and procedures that are specific to the
MVME2502. For general information on U-Boot, see
http://www.denx.de/wiki/U-
Boot/WebHome
6.2 Accessing U-Boot
1. Connect the board to a computer with a serial interface connector and a terminal
emulation software running on it. The serial connector of the board is found on the
faceplate.
2. Configure the terminal software to use the access parameters that are specified in U-
Boot. By default, the access parameters are as follows:

Baud rate: 9600

PC ANSI

8 data bits

No parity

1 stop bit