From mboxrd@z Thu Jan 1 00:00:00 1970 From: Karol Kozimor Subject: Re: C2/C3 don't do anything Date: Fri, 4 Feb 2005 22:34:07 +0100 Message-ID: <20050204213407.GA26515@hell.org.pl> References: <20050203034639.GA29164@atomide.com> <20050204203026.GA8049@dominikbrodowski.de> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-2 Content-Disposition: inline In-Reply-To: <20050204203026.GA8049-X3ehHDuj6sIIGcDfoQAp7BvVK+yQ3ZXh@public.gmane.org> Sender: acpi-devel-admin-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org Errors-To: acpi-devel-admin-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , List-Archive: To: Dominik Brodowski Cc: Tony Lindgren , acpi-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org List-Id: linux-acpi@vger.kernel.org Thus wrote Dominik Brodowski: > > I've done an idle module few years ago that enables C2 for dual > > Athlon boxes [3], and that involved enabling it in the southbridge. > > > > I thought the current ACPI code enables this already? But it does > > not seem to be the case? > > AFAIK, if there is no initialization method included in the ACPI table, the > ACPI code does _not_ currently enables some special, vendor-specific bit in > southbridges. > > > Should we have some extra code to scan the southbridges, > > Definitely. There is already some "errata" handling in the processor module, > possibly this could get extended. I'm still using the patch to enable C3 on ICHx-M I once posted. Basically, it provided a valid PM2_CNT_BLK address in case the OEM had forgotten to do that, which in turn enabled C3 by providing a valid ARB_DIS address (provided P_LVL3_LAT is valid). It might be worthwile to add some quirks, possibly opt-in by a commandline option. Best regards, -- Karol 'sziwan' Kozimor sziwan-DETuoxkZsSqrDJvtcaxF/A@public.gmane.org ------------------------------------------------------- This SF.Net email is sponsored by: IntelliVIEW -- Interactive Reporting Tool for open source databases. Create drag-&-drop reports. Save time by over 75%! Publish reports on the web. Export to DOC, XLS, RTF, etc. Download a FREE copy at http://www.intelliview.com/go/osdn_nl