[U-Boot-Users] HRCW on mpc8xx

[Wolfgang Denk]

In message <af313df20603061432p5dd04d2fq38e1b76ae61cc8b3 at mail.gmail.com> you wrote:
> I have been looking on Readme, Dulg, list and could not find where is
> exactaly the hrcw for 8xx based systems.

Please read the MPC8xx User's Manual. The HRCW is a  hardware  issue.
It cannot be set and not even read (directly) by software.

> Looking at my image (either at the embedded system or the *bin file),
> I've found the magic number (0x27051956) in the begining of it. I
> thought it isn't the hrcw, so, I came around the /cpu/mpc8xx/start.S

No, that's indeed not the HRCW. Not even mine :-)

> So, if the magic number is in the cs0, address zero, it will be at the
> data bus at the reset moment, if CS0 is asserted (better: if the
> device is activated).

No, the HRCW is asserted by external hardware. 

> I do not undestand. Is the magic number the HRCW?

No, it ain't. To most people it's just a magic number.

Best regards,

Wolfgang Denk

-- 
Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
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