The RESET pin is pulled down during internal reset. I know only the 8xx and 82xx family but IMHO the 440 is (should be) the same. The answer IS buried somewhere in the manuals. Ludwig

...

Howard, Marc wrote:

...

Try putting a scope/logic analyzer on your SYSRESET* line

to see if it

...

is getting pulled down when you try to reset from U-Boot.

Good point. But shouldn't the core and chip level reset still function, independent of the external reset line? The answer might be buried somewhere in the PPC440 tech manuals.

I might also talk to our hardware guys about this.

...