Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933409Ab0FCA1J (ORCPT ); Wed, 2 Jun 2010 20:27:09 -0400 Received: from mail-pv0-f174.google.com ([74.125.83.174]:61819 "EHLO mail-pv0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933344Ab0FCA1F (ORCPT ); Wed, 2 Jun 2010 20:27:05 -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=qebxlXoBXiL/AzXlx4dmLTm4TPkUsixcf6nJWBCqgoX4Zsdeq3qG4+1KR1QzKJ4W66 JyvDpxfoWKXNZhhu+XMJOJayvJEzbvQ0QpXHTTYmKmmpyJeBNlcVjd+tUGqpDXOwcnGn STwkqO+81aUlYp+xdzN9wozIvCNomvXOmgDkY= Message-ID: <4C06F6EA.6090701@gmail.com> Date: Wed, 02 Jun 2010 17:27:22 -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: <20100601192101.GA15086@srcf.ucam.org> <4C056839.8020605@gmail.com> <20100601200704.GA16091@srcf.ucam.org> <4C056AE6.3000409@gmail.com> <20100601202130.GA16391@srcf.ucam.org> <4C056E0C.2030709@gmail.com> <20100601203351.GA16575@srcf.ucam.org> <4C0572B4.6000201@gmail.com> <20100601211219.GA17719@srcf.ucam.org> <4C057AE9.9020307@gmail.com> <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> 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: 2168 Lines: 81 On 06/02/2010 05:20 PM, Robert Hancock wrote: > On Wed, Jun 2, 2010 at 6:05 PM, Justin P. Mattock > wrote: >>>>> Hmm, so the FADT says the reset register is listed as supported, and >>>>> says writing 0x06 to 0xCF9 is supposed to do it.. That's exactly what >>>>> this should do: >>>>> >>>>> #include >>>>> >>>>> int main() { >>>>> iopl(3); >>>>> outb(6, 0xcf9); >>>>> return 0; >>>>> } >>>>> >>>>> but you said that didn't do anything.. It kind of seems like ACPI >>>>> reboot is busted on this machine then, but then I wonder how Windows >>>>> manages to work.. >>>>> >>>> >>>> >>>> alright!! I have a better idea at what this is now.. >>>> as for the above code, yes this one segfaults, >>>> the other code posted on the thread just returns >>>> a command prompt(testing: >>> >>> You get a segfault on that one? Running as root? >>> >> >> my bad(tired)I left out iopl(3); >> in the code which was giving a segfault. >> >> running the below code(s) just gives a command prompt >> >> int main() { >> iopl(3); >> outb(0xfe, 0xcf9); >> return 0; >> } >> >> int main() { >> iopl(3); >> outb(6, 0xcf9); >> return 0; >> } > > What if you do: > > #include > > int main() { > iopl(3); > outb(2, 0xcf9); > sleep(1); > outb(6, 0xcf9); > return 0; > } > > That's basically what PCI reboot does. > > It's possible it doesn't take the first time - you could try modifying > drivers/acpi/reboot.c to call acpi_reset in a loop instead of just > trying once (assuming you have the patch to default to ACPI reboot > enabled). > the above code reboot's the machine as it should.. I can look at that(need to take a break first though) and see.. what about the whole kbd mechanism(0x64) give the info I provided does it look possible, or is this machine strictly on cf9? cheers, 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/