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 ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
