Skip site navigation (1)Skip section navigation (2)

FreeBSD Man Pages

Man Page or Keyword Search:
Man Architecture
Apropos Keyword Search (all sections) Output format
home | help
ACPIDUMP(8)		FreeBSD	System Manager's Manual		   ACPIDUMP(8)

NAME
     acpidump -- dump ACPI tables and ASL

SYNOPSIS
     acpidump [-d] [-t]	[-h] [-v] [-f dsdt_input] [-o dsdt_output]

DESCRIPTION
     The acpidump utility analyzes ACPI	tables in physical memory and can dump
     them to a file.  In addition, acpidump can	call iasl(8) to	disassemble
     AML (ACPI Machine Language) found in these	tables and dump	them as	ASL
     (ACPI Source Language) to stdout.

     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 acpidump	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.

     When acpidump is invoked without the -f option, it	will read ACPI tables
     from physical memory via /dev/mem.	 First it searches for the RSDP	(Root
     System Description	Pointer), which	has the	signature "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
     -t	flag, the acpidump utility dumps contents of the following tables:

	   DSDT
	   ECDT
	   FACS
	   FADT
	   HPET
	   MADT
	   MCFG
	   RSD PTR
	   RSDT

     The RSDT contains a pointer to the	physical memory	address	of the FACP
     (Fixed ACPI Description Table).  The FACP defines static system informa-
     tion about	power management support (ACPI Hardware	Register Implementa-
     tion) such	as interrupt mode (INT_MODEL), SCI interrupt number, SMI com-
     mand 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.

OPTIONS
     The following options are supported by acpidump:

     -d	     Disassemble the DSDT into ASL using iasl(8) and print the results
	     to	stdout.

     -t	     Dump the contents of the various fixed tables listed above.

     -h	     Displays usage and	exit.

     -v	     Enable verbose messages.

     -f	dsdt_input
	     Load the DSDT from	the specified file instead of physical memory.
	     Since only	the DSDT is stored in the file,	the -t flag may	not be
	     used with this option.

     -o	dsdt_output
	     Store the DSDT data block from physical memory into the specified
	     file.

FILES
     /dev/mem

EXAMPLES
     If	a developer requests a copy of your ASL, please	use the	following com-
     mand to dump all tables and compress the result.

	   # acpidump -dt | gzip -c9 > my_computer.asl.gz

     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.

	   # acpidump -t -d -o foo.dsdt	> foo.asl

     This example reads	a DSDT file and	disassembles it	to stdout.  Verbose
     messages are enabled.

	   # acpidump -v -d -f foo.dsdt

SEE ALSO
     acpi(4), mem(4), acpiconf(8), acpidb(8), iasl(8)

HISTORY
     The acpidump utility first	appeared in FreeBSD 5.0	and was	rewritten to
     use iasl(8) for FreeBSD 5.2.

AUTHORS
     Doug Rabson <dfr@FreeBSD.org>
     Mitsuru IWASAKI <iwasaki@FreeBSD.org>
     Yasuo YOKOYAMA <yokoyama@jp.FreeBSD.org>
     Nate Lawson <njl@FreeBSD.org>

     Some contributions	made by	Chitoshi Ohsawa	<ohsawa@catv1.ccn-net.ne.jp>,
     Takayasu IWANASHI <takayasu@wendy.a.perfect-liberty.or.jp>, Yoshihiko
     SARUMARU <mistral@imasy.or.jp>, Hiroki Sato <hrs@FreeBSD.org>, Michael
     Lucas <mwlucas@blackhelicopters.org> and Michael Smith
     <msmith@FreeBSD.org>.

BUGS
     The current implementation	does not dump the BOOT structure or other mis-
     cellaneous	tables.

FreeBSD	9.3		       February	14, 2005		   FreeBSD 9.3

NAME | SYNOPSIS | DESCRIPTION | OPTIONS | FILES | EXAMPLES | SEE ALSO | HISTORY | AUTHORS | BUGS

Want to link to this manual page? Use this URL:
<http://www.freebsd.org/cgi/man.cgi?query=acpidump&sektion=8&manpath=FreeBSD+9.3-RELEASE>

home | help