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30 GR-LEON4-ITX Development Board

Quick Start Guide

read 131 symbols

entry point: 0x00000000

The flash contents can now also be verified, either by spim flash verify prom.out or by the

faster verify prom.out:

grlib> verify prom.out

section: .text at 0x0, size 1575824 bytes

section: .data at 0x180b90, size 32 bytes

total size: 1575856 bytes (12.0 Mbit/s)

entry point: 0x00000000

grlib>

The PROM has now been successfully programmed. The software located in PROM can

now be booted by power cycling the board or by pushing the reset button.

U-boot

Note: U-boot currently only supports boot Linux images created with the SnapGear

distribution. If the more recent LinuxBuild Linux package is used then MKPROM2 must be

used to generate the PROM image.

U-Boot (Das Universal Boot loader) is boot loader for embedded systems developed by

http://www.denx.de and a port exists for SPARC/LEON. The LEON U-Boot can boot

RTEMS, VxWorks and Linux 2.6. Building the u-boot boot loader can be done with the

sparc-elf-gcc (BCC) crosscompiler.

The GR-LEON4-ITX data package contains a pre-built U-Boot image with a configuration

suitable for the board. The image is available in different formats in the directory gr-l4itx-

pack/u-boot/prebuilt this directory also contains a pre-built version of the mkimage tool. The

source for U-boot is on the USB Flash stick in the directory software/bootloaders/u-boot. To

re-build u-boot, enter the U-boot source directory and issue the command make

gr_leon4_itx_config followed by make.

To load the image onto the board, issue the following commands:

grlib> spim flash detect

Got manufacturer ID 0x20 and Device ID 0x2017

No device match for READ ID instruction, trying RES instruction..

Found matching device: ST/Numonyx M25P64

grlib> spim flash erase

grlib> spim flash load u-boot

section: .text at 0x0, size 208150 bytes

section: .u_boot_cmd at 0x32d18, size 1272 bytes

section: .data at 0x33210, size 34816 bytes

section: .got at 0x3ba10, size 4688 bytes

total size: 248926 bytes (116.9 kbit/s)

read 736 symbols

entry point: 0x00000000

grlib> verify u-boot

section: .text at 0x0, size 208150 bytes

section: .u_boot_cmd at 0x32d18, size 1272 bytes

section: .data at 0x33210, size 34816 bytes

section: .got at 0x3ba10, size 4688 bytes

total size: 248926 bytes (10.6 Mbit/s)

entry point: 0x00000000

grlib>