Date: Mon, 15 Mar 1999 01:23:25 +0900 (JST) From: Takanori Watanabe <takawata@shidahara1.planet.sci.kobe-u.ac.jp> To: FreeBSD-gnats-submit@freebsd.org Subject: i386/10587: ACPI BIOS Detection is no effect. Message-ID: <199903141623.BAA25004@libr.scitec.kobe-u.ac.jp>
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>Number: 10587
>Category: i386
>Synopsis: ACPI BIOS Detection is no effect.
>Confidential: no
>Severity: non-critical
>Priority: low
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Sun Mar 14 08:30:01 PST 1999
>Closed-Date:
>Last-Modified:
>Originator: Takanori Watanabe
>Release: FreeBSD 4.0-RELEASE i386
>Organization:
Kobe University
>Environment:
FreeBSD sana.home.local 4.0-CURRENT FreeBSD 4.0-CURRENT #2: Wed Mar 10 14:46:01 JST 1999 takawata@sana.home.local:/usr/home/takawata/src/sys/compile/LIEUTENANT i386
>Description:
In sys/i386/i386/bios.c ,there is following code.
printf("ACPI: %08x\n", bios_sigsearch(0, "FACP", 4, 1, 0));
This signature will not be found in so-called BIOS area.
The table is actually set up in tail of the memory.
There is "RST PTR " signatuere in so-called BIOS area .
(This signature represent the table containing pointer to
the FACP Table)
>How-To-Repeat:
Rebuild kernel with VM86 option and boot the kernel with -v option.
>Fix:
replace with
printf("ACPI: %08x\n",bios_sigsearch(0,"RST PTR ",8,16 0));
>Release-Note:
>Audit-Trail:
>Unformatted:
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