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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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