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Date: Tue, 4 Sep 2007 13:37:43 -0500
From: Josh Boyer <jwboyer@linux.vnet.ibm.com>
To: Scott Wood <scottwood@freescale.com>
Subject: Re: disable interrput under ppc?
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On Tue, 4 Sep 2007 13:24:33 -0500
Scott Wood <scottwood@freescale.com> wrote:

> On Tue, Sep 04, 2007 at 10:44:14AM +0800, Wang, Baojun wrote:
> > hi, list
> > 
> >   How can I disable interrput like `cli' in x86?
> 
> local_irq_disable().
> 
> > I want the following code freeze the box but it doesn't, $MSR is
> > altered however the box is still alive, how can I freeze the box like
> > `cli' in x86? Thanks very much!
> 
> Disabling interrupts doesn't freeze the machine by itself -- it depends
> on what you do afterwards, which you didn't show.

If you're using a BOOKE variant, there is a way to use the DBCR0
register to set debug wait enable or something to basically hang the
CPU until something external clears that bit.  But why you would want
to do that, I have no idea.

josh