Hi Wolfgang,
Wolfgang Denk wrote:
In message 3EF00E16.3050604@intracom.gr you wrote:
I think it's just proper defensive programming to always do a CP reset in that case, and as soon as possible.
Then probably the boot loader should do it before starting the Linux kernel.
This would be a mostly hidden requirement for any boot loader towards the ppc linux kernel.
The best thing we could do is do the reset at head_8xx.S.
Note that such a change will kill all attempts for ealy debug output over the serial console port.
That would also be the case when the boot loader does it. The kernel will initialize the uart again very early isn't it? And is a CP reset enough? I think I remember you also have to unlock the pram section that is used for uCode.
just some thoughts,
Jaap-Jan
Wolfgang Denk
-- Software Engineering: Embedded and Realtime Systems, Embedded Linux Phone: (+49)-8142-4596-87 Fax: (+49)-8142-4596-88 Email: wd@denx.de The one who says it cannot be done should never interrupt the one who is doing it.
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