Re: [PATCH]X86:reboot.c Add some dmi entries to pci_reboot_dmi_table.

[Justin P. Mattock]

On 06/02/2010 06:47 PM, Robert Hancock wrote:
> On Wed, Jun 2, 2010 at 7:37 PM, Matthew Garrett<mjg59@xxxxxxxxxxxxx>  wrote:
> > On Wed, Jun 02, 2010 at 05:27:22PM -0700, Justin P. Mattock wrote:
> > > On 06/02/2010 05:20 PM, Robert Hancock wrote:
> > > > #include<unistd.h>
> > > >
> > > > int main() {
> > > >           iopl(3);
> > > >           outb(2, 0xcf9);
> > > >           sleep(1);
> > > >           outb(6, 0xcf9);
> > > >           return 0;
> > > > }
> > > >
> > > > That's basically what PCI reboot does.
> > >
> > > the above code reboot's the machine as it should..
> > > I can look at that(need to take a break first though)
> > > and see..
> >
> > That's pretty infuriating. The ACPI-provided definition doesn't work,
> > and there's no ACPI mechanism for expressing the more complex cf9
> > behaviour. Windows doesn't appear to special case this, so we're
> > probably left trying to figure out why the keyboard controller method
> > doesn't work. Sigh.
>
> Do these Macs even have a PC keyboard controller? A recent thread on
> PS/2 keyboard/mouse controller probing suggests they may not..
>
> Justin, what happens if you try the simple outb(6, 0xcf9) test program
> multiple times, does that do anything?


this reboots the system


int main() {
           iopl(3);
           outb(6, 0xcf9);
           return 0;
}

Justin P. Mattock
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