1.\" ACPI (ACPI Package) 2.\" 3.\" Copyright (c) 1999 Doug Rabson <dfr@FreeBSD.org> 4.\" Copyright (c) 2000 Mitsuru IWASAKI <iwasaki@FreeBSD.org> 5.\" Copyright (c) 2000 Yasuo YOKOYAMA <yokoyama@jp.FreeBSD.org> 6.\" Copyright (c) 2000 Hiroki Sato <hrs@FreeBSD.org> 7.\" All rights reserved. 8.\" 9.\" Redistribution and use in source and binary forms, with or without 10.\" modification, are permitted provided that the following conditions 11.\" are met: 12.\" 1. Redistributions of source code must retain the above copyright 13.\" notice, this list of conditions and the following disclaimer. 14.\" 2. Redistributions in binary form must reproduce the above copyright 15.\" notice, this list of conditions and the following disclaimer in the 16.\" documentation and/or other materials provided with the distribution. 17.\" 18.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 19.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 22.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28.\" SUCH DAMAGE. 29.\" 30.\" $FreeBSD: src/usr.sbin/acpi/acpidump/acpidump.8,v 1.16 2004/06/04 19:21:06 ru Exp $ 31.\" $DragonFly: src/usr.sbin/acpi/acpidump/acpidump.8,v 1.4 2006/08/18 01:42:58 swildner Exp $ 32.\" 33.Dd August 31, 2000 34.Dt ACPIDUMP 8 35.Os 36.Sh NAME 37.Nm acpidump 38.Nd dump ACPI tables and ASL 39.Sh SYNOPSIS 40.Nm 41.Op Fl d 42.Op Fl t 43.Op Fl h 44.Op Fl v 45.Op Fl f Ar dsdt_input 46.Op Fl o Ar dsdt_output 47.Sh DESCRIPTION 48The 49.Nm 50utility analyzes ACPI tables in physical memory and can dump them to a file. 51In addition, 52.Nm 53can call 54.Xr iasl 8 55to disassemble AML 56(ACPI Machine Language) 57found in these tables and dump them as ASL 58(ACPI Source Language) 59to stdout. 60.Pp 61ACPI tables have an essential data block (the DSDT, 62Differentiated System Description Table) 63that includes information used on the kernel side such as 64detailed information about PnP hardware, procedures for controlling 65power management support, and so on. 66The 67.Nm 68utility can extract the DSDT data block from physical memory and store it into 69a DSDT output file and optionally also disassemble it. 70.Pp 71When 72.Nm 73is invoked without the 74.Fl f 75option, it will read ACPI tables from physical memory via 76.Pa /dev/mem . 77First it searches for the RSDP 78(Root System Description Pointer), 79which has the signature 80.Qq RSD PTR\ \& , 81and then gets the RSDT 82(Root System Description Table), 83which includes a list of pointers to physical memory addresses 84for other tables. 85The RSDT itself and all other tables linked from RSDT are generically 86called SDTs 87(System Description Tables) 88and their header has a common format which consists of items 89such as Signature, Length, Revision, Checksum, OEMID, OEM Table ID, 90OEM Revision, Creator ID and Creator Revision. 91When invoked with the 92.Fl t 93flag, the 94.Nm 95utility dumps contents of the following tables: 96.Pp 97.Bl -tag -offset indent -width 12345 -compact 98.It DSDT 99.It FADT 100.It HPET 101.It MADT 102.It RSD PTR 103.It RSDT 104.El 105.Pp 106The RSDT contains a pointer to the physical memory address of the FACP 107(Fixed ACPI Description Table). 108The FACP defines static system information about power management support 109(ACPI Hardware Register Implementation) 110such as interrupt mode (INT_MODEL), 111SCI interrupt number, SMI command port (SMI_CMD) 112and the location of ACPI registers. 113The FACP also has a pointer to a physical memory address for the DSDT. 114While the other tables are fixed format, 115the DSDT consists of free-formatted AML data. 116.Sh OPTIONS 117The following options are supported by 118.Nm : 119.Bl -tag -width indent 120.It Fl d 121Disassemble the DSDT into ASL using 122.Xr iasl 8 123and print the results to stdout. 124.It Fl t 125Dump the contents of the various fixed tables listed above. 126.It Fl h 127Displays usage and exit. 128.It Fl v 129Enable verbose messages. 130.It Fl f Ar dsdt_input 131Load the DSDT from the specified file instead of physical memory. 132Since only the DSDT is stored in the file, the 133.Fl t 134flag may not be used with this option. 135.It Fl o Ar dsdt_output 136Store the DSDT data block from physical memory into the specified file. 137.El 138.Sh FILES 139.Bl -tag -width /dev/mem 140.It Pa /dev/mem 141.El 142.Sh EXAMPLES 143This example dumps the DSDT from physical memory to foo.dsdt. 144It also prints the contents of various system tables and disassembles 145the AML contained in the DSDT to stdout, redirecting the output 146to foo.asl. 147.Bd -literal -offset indent 148# acpidump -t -d -o foo.dsdt > foo.asl 149.Ed 150.Pp 151This example reads a DSDT file and disassembles it to stdout. 152Verbose messages are enabled. 153.Bd -literal -offset indent 154# acpidump -v -d -f foo.dsdt 155.Ed 156.Sh SEE ALSO 157.Xr acpi 4 , 158.Xr mem 4 , 159.Xr acpiconf 8 , 160.Xr acpidb 8 , 161.Xr iasl 8 162.Sh HISTORY 163The 164.Nm 165utility first appeared in 166.Fx 5.0 167and was rewritten to use 168.Xr iasl 8 169for 170.Fx 5.2 . 171.Sh AUTHORS 172.An Doug Rabson Aq dfr@FreeBSD.org 173.An Mitsuru IWASAKI Aq iwasaki@FreeBSD.org 174.An Yasuo YOKOYAMA Aq yokoyama@jp.FreeBSD.org 175.Pp 176.An -nosplit 177Some contributions made by 178.An Chitoshi Ohsawa Aq ohsawa@catv1.ccn-net.ne.jp , 179.An Takayasu IWANASHI Aq takayasu@wendy.a.perfect-liberty.or.jp , 180.An Yoshihiko SARUMARU Aq mistral@imasy.or.jp , 181.An Hiroki Sato Aq hrs@FreeBSD.org , 182.An Michael Lucas Aq mwlucas@blackhelicopters.org 183and 184.An Michael Smith Aq msmith@FreeBSD.org . 185.Sh BUGS 186In the current implementation, 187.Nm 188does not dump the 189Secondary System Descriptor Table (SSDT), 190Embedded Controller Descriptor Table (ECDT), 191or BOOT structures. 192