# Re: Problem debugging ppc kernel with DDD/GDB/BDI2000 on a custom MPC8260 board

- From: Wolfgang Denk \<hidden\>
- Date: 2003-10-15 17:56:27 
- List: linuxppc-dev
- Page: https://ratatoskr.run/linuxppc-dev/2003/10/9390116
- Thread: https://ratatoskr.run/linuxppc-dev/2003/10/9390116/t.md

```text

Dear Joao,

in message [ref] you wrote:
>
> on u-boot IMMR was set to 0x04700000, which is acceptable as far as
> u-boot is concerned, but not allowed once the kernel is initialised.
>
> The other issue was that the Chip Select was not configured properly on
> u-boot (2MB instead of 32MB), which was not noticed in u-boot since the
> u-boot never tried to access memory above that region, but caused the
> kernel to reset the target.
...
> I am using the denx distribution linuxppc_2_4_devel, and I am
> configuring it using the TQM8260 default configuration, customising some
> CPM settings for UART and FEC.

I would like to point out that you certainly did NOT pick up  such  a
bogus memory map from the TQM8260 default configuration, nor from any
other board maintened by DENX.

Best regards,

Wolfgang Denk

--
Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
Phone: (+49)-8142-4596-87  Fax: (+49)-8142-4596-88  Email: wd@denx.de
Old programmers never die, they just branch to a new address.

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