Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933631Ab0FCCTA (ORCPT ); Wed, 2 Jun 2010 22:19:00 -0400 Received: from mail-px0-f174.google.com ([209.85.212.174]:36714 "EHLO mail-px0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933609Ab0FCCS7 (ORCPT ); Wed, 2 Jun 2010 22:18:59 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:user-agent:mime-version:to:cc:subject :references:in-reply-to:content-type:content-transfer-encoding; b=BhECJLgTymKdm1lkqY4y4iMiZIEkHCNAl998Qe9gIgB24bnTlyU0eX9H36X1DsineM y7YC7eiTWc46woqsYVyDiZigAQ2mkeyfOv/U4M8TGuz48eBm1AkdEgBPVm/9iciSJAJX RW1rdWubwVDpJsF7EP29m/Bqwpi80pYbrahLA= Message-ID: <4C071128.7050709@gmail.com> Date: Wed, 02 Jun 2010 19:19:20 -0700 From: "Justin P. Mattock" User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.4pre) Gecko/20091114 Lightning/1.0pre Thunderbird/3.0b4 MIME-Version: 1.0 To: Robert Hancock CC: Matthew Garrett , x86@kernel.org, tglx@linutronix.de, linux-kernel@vger.kernel.org Subject: Re: [PATCH]X86:reboot.c Add some dmi entries to pci_reboot_dmi_table. References: <20100601212901.GA18390@srcf.ucam.org> <4C057EF0.2030808@gmail.com> <4C05E800.1010400@gmail.com> <4C05F3BF.6090503@gmail.com> <4C06ECAA.3060708@gmail.com> <4C06ED18.2010400@gmail.com> <4C06F1DD.8060004@gmail.com> <4C06F6EA.6090701@gmail.com> <20100603013758.GA18755@srcf.ucam.org> <4C071048.9040209@gmail.com> In-Reply-To: <4C071048.9040209@gmail.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2127 Lines: 80 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 >> 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 >>>>> >>>>> 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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/