Re: Re: MPC8245 reboot

Re: Re: MPC8245 reboot

[Debora Liu]

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Hello, Mark A. Greer

In message <2005-08-04 02:39:32 mgreer@mvista.com> you wrote:

>IIRC, the sandpoint uses the PC style port 92 mechanism to reset the board.
>You need to look at your hardware docs to see how your board can be reset.
>Don't expect the sandpoint reset code to work for you.

If do reboot board by jump address of uboot start address?

= = = = = = = = = = = = = = = = = = = =
				 
¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡Debora Liu
¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡deboralh@fel.com.cn
¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡2005-08-04

Re: MPC8245 reboot

[Wolfgang Denk]

In message <20050804092525.15A4A67EBC@ozlabs.org> you wrote:
> 
> If do reboot board by jump address of uboot start address?

Bad idea. That address may not be mapped at all, or not at the  right
physical  address.  Also,  just  jumping to a boot loader entry point
does not cause a hardware reset, so any devices that might  be  stuck
will remain stuck.

You should always try to  cause  a  real  reset;  there  are  several
methods  in  use  for  this,  like  using a watchdog reset, causing a
machine check, etc. Just see existing code.

Best regards,

Wolfgang Denk

-- 
Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd@denx.de
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