From: Bruno Ducrot <ducrot-kk6yZipjEM5g9hUCZPvPmw@public.gmane.org>
To: Ow Mun Heng <ow.mun.heng-Sjgp3cTcYWE@public.gmane.org>
Cc: acpi-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org
Subject: Re: ACPI PM Timer
Date: Tue, 2 Mar 2004 11:55:27 +0100 [thread overview]
Message-ID: <20040302105527.GE2869@poupinou.org> (raw)
In-Reply-To: <C386328088ED7F4E9F81AFBABDDF60DA045C6E45-Yw6hFe9C1vnHQcBQSaPqJq0fmWJ9l57d0E9HWUfgJXw@public.gmane.org>
On Tue, Mar 02, 2004 at 09:29:29AM +0800, Ow Mun Heng wrote:
>
> I know this is bad form(to ask twice).. but...
> What is this ACPI PM timesource?
>
> Since I have this "TSC cannot be used as a timesource" when running battery.
>
Sorry, I forgot your question. This is the power management timer
as defined by 4.7.1.4 and 4.7.2.1.
The FADT will give you some io registers in order to access the ACPI pm timer,
which is an hardware requirement in order for an hardware platform being ACPI
compliant. You can then access to a counter. It also can generate
interrupts.
The purpose for it is to replace the old PIT as the main clock for a system.
--
Bruno Ducrot
-- Which is worse: ignorance or apathy?
-- Don't know. Don't care.
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next prev parent reply other threads:[~2004-03-02 10:55 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-03-02 1:29 ACPI PM Timer Ow Mun Heng
[not found] ` <C386328088ED7F4E9F81AFBABDDF60DA045C6E45-Yw6hFe9C1vnHQcBQSaPqJq0fmWJ9l57d0E9HWUfgJXw@public.gmane.org>
2004-03-02 10:55 ` Bruno Ducrot [this message]
-- strict thread matches above, loose matches on Subject: below --
2004-02-26 7:29 Ow Mun Heng
2004-02-24 21:08 Grover, Andrew
[not found] ` <F760B14C9561B941B89469F59BA3A8470255F022-sBd4vmA9Se4Lll3ZsUKC9FDQ4js95KgL@public.gmane.org>
2004-02-24 21:32 ` Tomasz Ciolek
2004-02-24 22:02 ` Andi Kleen
2004-02-29 1:48 ` Nate Lawson
[not found] ` <20040228174754.X99033-Y6VGUYTwhu0@public.gmane.org>
2004-03-01 17:38 ` Bruno Ducrot
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