[U-Boot] Need help to get u-boot running on the taskit stamp9g20

[Markus Hubig <mhubig@imko.de>]

On Wed, Jul 18, 2012 at 03:21:00PM +0200, Markus Hubig wrote:
> Hmm OK I disabled the watchdog and enabled debugging and now this
> is what I get at the first boot after flashing:
> 
> | RomBOOT
> | 
> | 
> | U-Boot 2012.04.01-00003-gab465ef-dirty (Jul 18 2012 - 15:08:22)
> | 
> | U-Boot code: 23F00000 -> 23F30130  BSS: -> 23F71E28
> | CPU: AT91SAM9G20
> | Crystal frequency:   18.432 MHz
> | CPU clock        :  396.288 MHz
> | Master clock     :  132.096 MHz
> | Starting dram_init!
> | dram_init finished!
> | monitor len: 00071E28
> | ramsize: 04000000
> | Top of RAM usable for U-Boot at: 24000000
> | Reserving 455k for U-Boot at: 23f8e000
> | Reserving 640k for malloc() at: 23eee000
> | Reserving 36 Bytes for Board Info at: 23eedfdc
> | Reserving 144 Bytes for Global Data at: 23eedf4c
> | New Stack Pointer is: 23eedf40
> | RAM Configuration:
> | Bank #0: 20000000 64 MiB
> | relocation Offset is: 0008e000
> | WARNING: Caches not enabled
> | monitor flash len: 00035750
> | Starting board_init!
> | Starting stamp9G20_nand_hw_init!
> | stamp9G20_nand_hw_init finished!
> | Starting stamp9G20_macb_hw_init!
> | stamp9G20_macb_hw_init finished!
> | board_init finished!
> | Now running in RAM - U-Boot at: 23f8e000
> 
> The red LED is on and I can't input anything.

OK now I managed to plug a JTAG Adapter with OpenOCD to the
PortuxG20. But what now? How can I find out where I stuck?

Cheers, Markus