Accessing MPC862 registers

[Wolfgang Denk]

In message <742AC4678EF8464697DDDFE3B40F6ECD07E248 at SRV-MAILRND.azisa.co.za> you wrote:
>
> I'm hoping that someone can help me here. I'm using the TQM8xxL module
> with a MPC862 processor on board. With minor changes to the pin
> configurations for the ethernet controller I have gotten U-boot and
> Linux to work without any issues. However from my BDI2000 shell, with my

I'd appreciate if you'd send me your patches, then.

> IMMR set to 0xFFF00000 (confirmed), I cannot do memory dumps for the
> region 0xFFF00000 - 0xFFF02000. From FFF02000 (DP-RAM) the memory
> accesses seem fine. The same goes for the u-boot shell. Obviously u-boot

You cannot use a stupid "memory dump" command on  the  IMMR  register
space  -  there are reserved entries that may not be accessed at all,
there are registers that must be accessed in the correct length (8  /
16  /  32 bit), etc. You should be able to read individual registers,
though, assuming you know where they are and how to access them (8  /
16 / 32 bit).

> registers which are located from 0xFFF00000 to 0xFFF00DFF from either
> u-boot or the BDI shell?

And once again, this has nothing to do with  linuxppc-embedded.  It's
off topic on this list. Better ask such questions in u-boot-users.

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
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                          _Miscellaneous Maxims and Opinions_ no. 168

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