Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933614Ab0FCCPQ (ORCPT ); Wed, 2 Jun 2010 22:15:16 -0400 Received: from mail-pz0-f185.google.com ([209.85.222.185]:55733 "EHLO mail-pz0-f185.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933579Ab0FCCPP (ORCPT ); Wed, 2 Jun 2010 22:15:15 -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=Vbl4w8hJtfQnv1fYP1RWfl8bR7JieoMtFUoj8milMQs5mp3mStqdAa3eOPkGwAWKGS 0jsy/37si20AxRy+mYnGHwJWYCYjIFwpwUhYS+QDtUF2y3Iz7jg7a3l/4wtL3EkA1VJU Ga1uL/BQJ+HZGVAxhSdm0soWYkkl6NYRVkq+4= Message-ID: <4C071048.9040209@gmail.com> Date: Wed, 02 Jun 2010 19:15:36 -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> In-Reply-To: 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: 1890 Lines: 71 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) 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.) Justin P. Mattock 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/