Messages in this thread | | | Date | Wed, 02 Jun 2010 19:19:20 -0700 | From | "Justin P. Mattock" <> | Subject | Re: [PATCH]X86:reboot.c Add some dmi entries to pci_reboot_dmi_table. |
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On 06/02/2010 07:15 PM, Justin P. Mattock wrote: > 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? >> > > > as soon as I change: > > int main() { > iopl(3); > outb(6, 0xcf9); > usleep(100); > outb(6, 0xcf9); > return 0; > } > (the above gave a command prompt > with numerous tries) > to: > > int main() { > iopl(3); > outb(2, 0xcf9); > usleep(100); > outb(6, 0xcf9); > return 0; > } > > it worked..(on the first try) >
just rebooted, and tried the one that worked, had no response(just a command prompt) even though it rebooted the system prior too.
> but still am confused as > to why I tried: outb(2, 0xcf9); > with nothing happening. > (Maybe something in there > is changing each boot or something.) >
something is changing in there it seems.
Justin P. Mattock
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