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SubjectRe: [PATCH]X86:reboot.c Add some dmi entries to pci_reboot_dmi_table.
On 06/02/2010 06:47 PM, Robert Hancock wrote:
> On Wed, Jun 2, 2010 at 7:37 PM, Matthew Garrett<mjg59@srcf.ucam.org> 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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