I need help getting u-boot to display its interactive prompt. I posted yesterday to the u-boot mailing list, but I haven't gotten a response yet.
I have an IBM/AMCC PPC440GP evaluation board ("Ebony"). I built u-boot with gcc 3.4.4 by issuing
make EBONY_config make
which built u-boot without any errors. I did not modify the configuration header file at all. The default disables automatic boot, so I should just get a prompt.
I wrote the resulting u-boot.bin file to flash using a JTAG programmer. I set the DIP switches and jumpers according to the README.ebony instructions. When I turn on the power, it displays some console text and then stops without a prompt. The console text is as follows:
----begin console output----- U-Boot 1.1.2 (Jul 6 2005 - 15:51:04)
IBM PowerPC 440 GP Rev. C Board: IBM 440GP Evaluation Board (Ebony) VCO: 600 MHz CPU: 300 MHz PLB: 100 MHz OPB: 50 MHz EPB: 50 MHz I2C: ready DRAM: I2c read: failed 4 I2c read: failed 4
128 MB-----end console output-----
Nothing more happens. No prompt is displayed. I tried the J41/J42 bootstrap corruption directions, but it did not seem to have any effect.
If I press the reset switch, I get the same output as when I power up, except that the last line (128 MB) is not generated.
I assume the I2c read failures are not normal, but I am not sure. Could someone suggest what to do next?
Thanks.
Gregg