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-.\" ACPI (ACPI Package)
-.\"
-.\" Copyright (c) 1999 Doug Rabson <dfr@FreeBSD.org>
-.\" Copyright (c) 2000 Mitsuru IWASAKI <iwasaki@FreeBSD.org>
-.\" Copyright (c) 2000 Yasuo YOKOYAMA <yokoyama@jp.FreeBSD.org>
-.\" Copyright (c) 2000 Hiroki Sato <hrs@FreeBSD.org>
-.\" All rights reserved.
-.\"
-.\" Redistribution and use in source and binary forms, with or without
-.\" modification, are permitted provided that the following conditions
-.\" are met:
-.\" 1. Redistributions of source code must retain the above copyright
-.\"    notice, this list of conditions and the following disclaimer.
-.\" 2. Redistributions in binary form must reproduce the above copyright
-.\"    notice, this list of conditions and the following disclaimer in the
-.\"    documentation and/or other materials provided with the distribution.
-.\"
-.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
-.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
-.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
-.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
-.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
-.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
-.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
-.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
-.\" SUCH DAMAGE.
-.\"
-.\" $FreeBSD$
-.\"
-.Dd February 14, 2005
-.Dt ACPIDUMP 8
-.Os
-.Sh NAME
-.Nm acpidump
-.Nd dump ACPI tables and ASL
-.Sh SYNOPSIS
-.Nm
-.Op Fl d
-.Op Fl t
-.Op Fl h
-.Op Fl v
-.Op Fl f Ar dsdt_input
-.Op Fl o Ar dsdt_output
-.Sh DESCRIPTION
-The
-.Nm
-utility analyzes ACPI tables in physical memory and can dump them to a file.
-In addition,
-.Nm
-can call
-.Xr iasl 8
-to disassemble AML
-(ACPI Machine Language)
-found in these tables and dump them as ASL
-(ACPI Source Language)
-to stdout.
-.Pp
-ACPI tables have an essential data block (the DSDT,
-Differentiated System Description Table)
-that includes information used on the kernel side such as
-detailed information about PnP hardware, procedures for controlling
-power management support, and so on.
-The
-.Nm
-utility can extract the DSDT data block from physical memory and store it into
-an output file and optionally also disassemble it.
-If any Secondary System Description Table
-(SSDT)
-entries exist, they will also be included in the output file and disassembly.
-.Pp
-When
-.Nm
-is invoked without the
-.Fl f
-option, it will read ACPI tables from physical memory via
-.Pa /dev/mem .
-First it searches for the RSDP
-(Root System Description Pointer),
-which has the signature
-.Qq RSD PTR\ \& ,
-and then gets the RSDT
-(Root System Description Table),
-which includes a list of pointers to physical memory addresses
-for other tables.
-The RSDT itself and all other tables linked from RSDT are generically
-called SDTs
-(System Description Tables)
-and their header has a common format which consists of items
-such as Signature, Length, Revision, Checksum, OEMID, OEM Table ID,
-OEM Revision, Creator ID and Creator Revision.
-When invoked with the
-.Fl t
-flag, the
-.Nm
-utility dumps contents of the following tables:
-.Pp
-.Bl -tag -offset indent -width 12345 -compact
-.It DSDT
-.It ECDT
-.It FACS
-.It FADT
-.It HPET
-.It MADT
-.It MCFG
-.It RSD PTR
-.It RSDT
-.El
-.Pp
-The RSDT contains a pointer to the physical memory address of the FACP
-(Fixed ACPI Description Table).
-The FACP defines static system information about power management support
-(ACPI Hardware Register Implementation)
-such as interrupt mode (INT_MODEL),
-SCI interrupt number, SMI command port (SMI_CMD)
-and the location of ACPI registers.
-The FACP also has a pointer to a physical memory address for the DSDT.
-While the other tables are fixed format,
-the DSDT consists of free-formatted AML data.
-.Sh OPTIONS
-The following options are supported by
-.Nm :
-.Bl -tag -width indent
-.It Fl d
-Disassemble the DSDT into ASL using
-.Xr iasl 8
-and print the results to stdout.
-.It Fl t
-Dump the contents of the various fixed tables listed above.
-.It Fl h
-Displays usage and exit.
-.It Fl v
-Enable verbose messages.
-.It Fl f Ar dsdt_input
-Load the DSDT from the specified file instead of physical memory.
-Since only the DSDT is stored in the file, the
-.Fl t
-flag may not be used with this option.
-.It Fl o Ar dsdt_output
-Store the DSDT data block from physical memory into the specified file.
-.El
-.Sh FILES
-.Bl -tag -width /dev/mem
-.It Pa /dev/mem
-.El
-.Sh EXAMPLES
-If a developer requests a copy of your ASL, please use the following
-command to dump all tables and compress the result.
-.Bd -literal -offset indent
-# acpidump -dt | gzip -c9 > my_computer.asl.gz
-.Ed
-.Pp
-This example dumps the DSDT from physical memory to foo.dsdt.
-It also prints the contents of various system tables and disassembles
-the AML contained in the DSDT to stdout, redirecting the output
-to foo.asl.
-.Bd -literal -offset indent
-# acpidump -t -d -o foo.dsdt > foo.asl
-.Ed
-.Pp
-This example reads a DSDT file and disassembles it to stdout.
-Verbose messages are enabled.
-.Bd -literal -offset indent
-# acpidump -v -d -f foo.dsdt
-.Ed
-.Sh SEE ALSO
-.Xr acpi 4 ,
-.Xr mem 4 ,
-.Xr acpiconf 8 ,
-.Xr acpidb 8 ,
-.Xr iasl 8
-.Sh HISTORY
-The
-.Nm
-utility first appeared in
-.Fx 5.0
-and was rewritten to use
-.Xr iasl 8
-for
-.Fx 5.2 .
-.Sh AUTHORS
-.An Doug Rabson Aq dfr@FreeBSD.org
-.An Mitsuru IWASAKI Aq iwasaki@FreeBSD.org
-.An Yasuo YOKOYAMA Aq yokoyama@jp.FreeBSD.org
-.An Nate Lawson Aq njl@FreeBSD.org
-.Pp
-.An -nosplit
-Some contributions made by
-.An Chitoshi Ohsawa Aq ohsawa@catv1.ccn-net.ne.jp ,
-.An Takayasu IWANASHI Aq takayasu@wendy.a.perfect-liberty.or.jp ,
-.An Yoshihiko SARUMARU Aq mistral@imasy.or.jp ,
-.An Hiroki Sato Aq hrs@FreeBSD.org ,
-.An Michael Lucas Aq mwlucas@blackhelicopters.org
-and
-.An Michael Smith Aq msmith@FreeBSD.org .
-.Sh BUGS
-The current implementation does not dump the BOOT structure or
-other miscellaneous tables.