175 lines
5.8 KiB
Groff
175 lines
5.8 KiB
Groff
.\" ACPI (ACPI Package)
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.\"
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.\" Copyright (c) 1999 Doug Rabson <dfr@FreeBSD.org>
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.\" Copyright (c) 2000 Mitsuru IWASAKI <iwasaki@FreeBSD.org>
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.\" Copyright (c) 2000 Yasuo YOKOYAMA <yokoyama@jp.FreeBSD.org>
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.\" Copyright (c) 2000 Hiroki Sato <hrs@FreeBSD.org>
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" $FreeBSD$
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.\"
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.Dd August 31, 2000
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.Dt ACPIDUMP 8
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.Os
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.Sh NAME
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.Nm acpidump
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.Nd dump ACPI tables
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.Sh SYNOPSIS
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.Nm
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.Nm
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.Op Fl o Ar dsdt_file_for_output
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.Nm
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.Op Fl f Ar dsdt_file_for_input
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.Sh DESCRIPTION
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The
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.Nm
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command analyzes ACPI tables in physical memory and dumps them to standard output.
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In addition,
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.Nm
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can disassemble some contents of the tables in AML
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.Pq ACPI Machine Language
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and dump them in ASL
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.Pq ACPI Source Language .
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.Pp
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ACPI tables have an notably essential data block called DSDT
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.Pq Differentiated System Description Table ,
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that includes information used on the kernel side such as
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detail information about PnP hardware, procedures for controlling
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a power management support and so on.
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.Nm
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can extract a DSDT data block from physical memory and store it into
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a DSDT data file, and also can generate an output in ASL
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from a given DSDT data file.
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.Pp
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When
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.Nm
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is invoked with no option, it will search ACPI tables from physical
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memory via a special file
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.Pa /dev/mem
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and dump them. First, it searches Root System Description Pointer,
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that has a signature
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.Qq RSD PTR\ \& ,
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and then gets RSDT
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.Pq Root System Description Table ,
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which includes a list of pointers to physical memory addresses
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for other tables.
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RSDT itself and all other tables linked from RSDT are generically
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called SDT
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.Pq System Description Table
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and their header has the common format which consists of items
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such as Signature, Length, Revision, Checksum, OEMID, OEM Table ID,
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OEM Revision, Creator ID and Creator Revision.
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.Nm
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dumps contents of these SDTs.
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For further information about formats of each table,
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see chapter 5: ACPI Software Programming Model,
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.Dq Advanced Configuration and Power Interface Specification Revision 1.0b
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from Intel/Microsoft/Toshiba.
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.Pp
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There is always a pointer to a physical memory address in RSDT for FACP
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.Pq Fixed ACPI Description Table .
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FACP defines static system information about power management support
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.Pq ACPI Hardware Register Implementation
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such as interrupt mode
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.Pq INT_MODEL ,
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SCI interrupt number, SMI command port
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.Pq SMI_CMD
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and location of ACPI registers.
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FACP also has a pointer to a physical memory address for DSDT,
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which includes information used on the kernel side such as
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PnP, power management support and so on.
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While the other tables are described in fixed format,
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DSDT consists of AML data which compiled from sources
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written in free formated ASL, description language for ACPI.
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When
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.Nm
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outputs DSDT, it disassembles the AML data and
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translates them into ASL.
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.Sh OPTIONS
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The following options are supported by
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.Nm :
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.Bl -tag -width indent
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.It Fl o Ar dsdt_file_for_output
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Stores DSDT data block from physical memory into a file specified in
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.Ar dsdt_file_for_output
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in addition to behavior with no option.
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.It Fl f Ar dsdt_file_for_input
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Interprets AML data in DSDT from a file specified in
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.Ar dsdt_file_for_input
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and dumps them in ASL to standard output.
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.It Fl h
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Displays usage and exit.
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.El
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.Sh EXAMPLES
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This is an example to get a dump of SDTs and a DSDT data file
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simultaneously on a machine that supports ACPI BIOS.
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.Bd -literal -offset indent
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# acpidump -o foo.dsdt > foo.asl
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.Ed
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.Sh BUGS
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In the current implementation,
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.Nm
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doesn't dump any information of Firmware ACPI Control Structure
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.Pq FACS
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specified by a pointer in FACP.
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Some parts of output in ASL are incomplete. To obtain a complete
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output, it would need to change the implementation into another one
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that analyzes a whole DSDT and builds an ACPI namespace as preprocess,
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and then interprets the DSDT again referring to namespace.
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.Sh FILES
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.Bl -tag -width /dev/mem
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.It Pa /dev/mem
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.El
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.Sh SEE ALSO
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.Xr acpi 4 ,
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.Xr mem 4 ,
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.Xr acpiconf 8 ,
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.Xr amldb 8
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.Pp
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.Dq Advanced Configuration and Power Interfce Specification
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.Bd -literal -offset indent -compact
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Intel
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Microsoft
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Toshiba
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Revision 1.0b
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.Ed
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<URL:http://www.teleport.com/~acpi/>
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.Sh AUTHORS
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.An Doug Rabson Aq dfr@FreeBSD.org
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.An Mitsuru IWASAKI Aq iwasaki@FreeBSD.org
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.An Yasuo YOKOYAMA Aq yokoyama@jp.FreeBSD.org
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.Pp
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Some contributions made by
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.An Chitoshi Ohsawa Aq ohsawa@catv1.ccn-net.ne.jp ,
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.An Takayasu IWANASHI Aq takayasu@wendy.a.perfect-liberty.or.jp ,
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.An Yoshihiko SARUMARU Aq mistral@imasy.or.jp ,
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.An Hiroki Sato Aq hrs@FreeBSD.org ,
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and
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.An Michael Lucas Aq mwlucas@blackhelicopters.org .
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.Sh HISTORY
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The
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.Nm
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command appeared in
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.Fx 5.0 .
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