Ebony/440GP boot problems

[brian.auld at adic.com]

To recap:

I am trying to get embedded linux running on the Ebony 440GP eval board with
u-boot as the boot loader.

I believe I've successfully programmed u-boot into the upper 0.5MB of the
32bit memory map. I don't want to print out the entire memory dump, but I'll
attach the beginning and end of the top 0.5MB chunk of memory (i.e. u-boot).

When I reset the board, the serial console is dead. I've tried every
imaginable baud rate and the serial console is still dead. Even if I had the
wrong baud, I'd at least expect to see jibberish on the serial console,
which I don't.

Any suggestions? The third clip below, showing the top 256 bytes of the boot
area, has data content of 0x4bfff004. In what I have gotten so far out of
440GP manuals, this address is the reset vector. Well, if that's the case,
0x4bfff0004 does not sound like a good number, does it. Or, am I looking in
the wrong place. I thought the contents of addr 0xfffffffc would point to
the start of u-boot at addr 0xfff80000, which it doesn't appear to.

========= Clip of bdi console on reset  ==========
BDI>reset
- TARGET: processing user reset request
- TARGET: reseting target passed
- TARGET: processing target startup ....
- TARGET: processing target startup passed
BDI>
==================================================


========= bottom 256 bytes of boot area ==========
BDI>md 0xfff80000
fff80000 : 27051956 552d426f 6f742030 2e322e30  '..VU-Boot 0.2.0
fff80010 : 20284a61 6e203331 20323030 33202d20   (Jan 31 2003 -
fff80020 : 30353a31 323a3535 29000000 00000000  05:12:55).......
fff80030 : 00000000 00000000 00000000 00000000  ................
fff80040 : 00000000 00000000 00000000 00000000  ................
fff80050 : 00000000 00000000 00000000 00000000  ................
fff80060 : 00000000 00000000 00000000 00000000  ................
fff80070 : 00000000 00000000 00000000 00000000  ................
fff80080 : 00000000 00000000 00000000 00000000  ................
fff80090 : 00000000 00000000 00000000 00000000  ................
fff800a0 : 00000000 00000000 00000000 00000000  ................
fff800b0 : 00000000 00000000 00000000 00000000  ................
fff800c0 : 00000000 00000000 00000000 00000000  ................
fff800d0 : 00000000 00000000 00000000 00000000  ................
fff800e0 : 00000000 00000000 00000000 00000000  ................
fff800f0 : 00000000 00000000 00000000 00000000  ................
BDI>
====================================================



============ Top 256 bytes of boot area ============
BDI>md 0xffffff00
ffffff00 : ffffffff ffffffff ffffffff ffffffff  ................
ffffff10 : ffffffff ffffffff ffffffff ffffffff  ................
ffffff20 : ffffffff ffffffff ffffffff ffffffff  ................
ffffff30 : ffffffff ffffffff ffffffff ffffffff  ................
ffffff40 : ffffffff ffffffff ffffffff ffffffff  ................
ffffff50 : ffffffff ffffffff ffffffff ffffffff  ................
ffffff60 : ffffffff ffffffff ffffffff ffffffff  ................
ffffff70 : ffffffff ffffffff ffffffff ffffffff  ................
ffffff80 : ffffffff ffffffff ffffffff ffffffff  ................
ffffff90 : ffffffff ffffffff ffffffff ffffffff  ................
ffffffa0 : ffffffff ffffffff ffffffff ffffffff  ................
ffffffb0 : ffffffff ffffffff ffffffff ffffffff  ................
ffffffc0 : ffffffff ffffffff ffffffff ffffffff  ................
ffffffd0 : ffffffff ffffffff ffffffff ffffffff  ................
ffffffe0 : ffffffff ffffffff ffffffff ffffffff  ................
fffffff0 : ffffffff ffffffff ffffffff 4bfff004  ............K...
BDI>
========= Clip of bdi console on reset  ==========

Any suggestions would be appreciated.

-- Brian

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