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To: Warner Losh <imp@harmony.village.org>
Cc: jhb@FreeBSD.org, ume@FreeBSD.org, cvs-all@FreeBSD.org,
	cvs-committers@FreeBSD.org
Subject: Re: cvs commit: src/sys/modules Makefile src/sys/modules/apm Mak 
In-reply-to: Your message of "Wed, 24 Oct 2001 23:05:27 CST."
             <200110250505.f9P55R739324@harmony.village.org>
Date: Thu, 25 Oct 2001 14:14:02 +0900
From: Takanori Watanabe <takawata@shidahara1.planet.sci.kobe-u.ac.jp>
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In message <200110250505.f9P55R739324@harmony.village.org>, Warner Losh wrote:
>In message <20011025.133304.74756197.iwasaki@jp.FreeBSD.org> Mitsuru IWASAKI w
>rites:
>: True.  Also we should make apm loadable on only loader.  Loading by
>: kldload makes situation very complicated, I think.
>: Also we need some sort of arbitration mechanism for APM and ACPI.
>: They are no able to co-exist together at the same time.
>: I'll make patches tonight or tomorrow.
>
>I've been able to have both acpi and apm in a kernel and have it boot
>and survive for a time.  I'm not sure that I'd like to be able to do that.

 The spec says APM and ACPI should not co-exist together.
If ACPI is initialized prior than APM, APM detection will fail,
 as it should be.
At least, some of interrupts the APM BIOS uses (System Management Interrupt)
is replaced into OS-visible interrupt ( called System Control Interrupt).
So event handling will not work properly.

Takanori Watanabe
<a href="http://www.planet.sci.kobe-u.ac.jp/~takawata/key.html">
Public Key</a>
Key fingerprint =  2C 51 E2 78 2C E1 C5 2D  0F F1 20 A3 11 3A 62 2A 




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