using bdi2000 to debug ppcboot on mpc7455

[Wolfgang Denk]

In message <16242.64239.133401.668446 at waldo.lisle.iphase.com> you wrote:
>
> In addition to the issue Mark pointed out, you can't use soft
> breakpoints while you are running from ROM which is the common case
> for the early init parts of U-Boot.
>
> Also, once U-Boot has relocated itself, you need to identify the new
> base address and inform gdb of the new load address.

And not to forget that, in the very  early  startup  code  (like  the
symbol  "boot_cold" mentioned by Q-ha Park), the memory controller is
still running in the reset configuration, i. e.  the  PC  will  still
point  to the reset vector area (0x0000'01xx or 0xFFF0'01xx), and NOT
yet  to  the  addresses  in  the  U-Boot  symbol  table.  Only  after
"in_flash" the symbols are correct.


Best regards,

Wolfgang Denk

--
Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
Phone: (+49)-8142-4596-87  Fax: (+49)-8142-4596-88  Email: wd at denx.de
"A little knowledge is a dangerous thing."                - Doug Gwyn

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