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.\" $FreeBSD$ 31.\" 32.Dd August 31, 2000 33.Dt ACPIDUMP 8 34.Os 35.Sh NAME 36.Nm acpidump 37.Nd dump ACPI tables and ASL 38.Sh SYNOPSIS 39.Nm 40.Op Fl d 41.Op Fl t 42.Op Fl h 43.Op Fl v 44.Op Fl f Ar dsdt_input 45.Op Fl o Ar dsdt_output 46.Sh DESCRIPTION 47The 48.Nm 49utility analyzes ACPI tables in physical memory and can dump them to a file. 50In addition, 51.Nm 52can call 53.Xr iasl 8 54to disassemble AML 55(ACPI Machine Language) 56found in these tables and dump them as ASL 57(ACPI Source Language) 58to stdout. 59.Pp 60ACPI tables have an essential data block (the DSDT, 61Differentiated System Description Table) 62that includes information used on the kernel side such as 63detailed information about PnP hardware, procedures for controlling 64power management support, and so on. 65The 66.Nm 67utility can extract the DSDT data block from physical memory and store it into 68a DSDT output file and optionally also disassemble it. 69.Pp 70When 71.Nm 72is invoked without the 73.Fl f 74option, it will read ACPI tables from physical memory via 75.Pa /dev/mem . 76First it searches for the RSDP 77(Root System Description Pointer), 78which has the signature 79.Qq RSD PTR\ \& , 80and then gets the RSDT 81(Root System Description Table), 82which includes a list of pointers to physical memory addresses 83for other tables. 84The RSDT itself and all other tables linked from RSDT are generically 85called SDTs 86(System Description Tables) 87and their header has a common format which consists of items 88such as Signature, Length, Revision, Checksum, OEMID, OEM Table ID, 89OEM Revision, Creator ID and Creator Revision. 90When invoked with the 91.Fl t 92flag, the 93.Nm 94utility dumps contents of the following tables: 95.Pp 96.Bl -tag -offset indent -width 12345 -compact 97.It DSDT 98.It FADT 99.It HPET 100.It MADT 101.It RSD PTR 102.It RSDT 103.El 104.Pp 105The RSDT contains a pointer to the physical memory address of the FACP 106(Fixed ACPI Description Table). 107The FACP defines static system information about power management support 108(ACPI Hardware Register Implementation) 109such as interrupt mode (INT_MODEL), 110SCI interrupt number, SMI command port (SMI_CMD) 111and the location of ACPI registers. 112The FACP also has a pointer to a physical memory address for the DSDT. 113While the other tables are fixed format, 114the DSDT consists of free-formatted AML data. 115.Sh OPTIONS 116The following options are supported by 117.Nm : 118.Bl -tag -width indent 119.It Fl d 120Disassemble the DSDT into ASL using 121.Xr iasl 8 122and print the results to stdout. 123.It Fl t 124Dump the contents of the various fixed tables listed above. 125.It Fl h 126Displays usage and exit. 127.It Fl v 128Enable verbose messages. 129.It Fl f Ar dsdt_input 130Load the DSDT from the specified file instead of physical memory. 131Since only the DSDT is stored in the file, the 132.Fl t 133flag may not be used with this option. 134.It Fl o Ar dsdt_output 135Store the DSDT data block from physical memory into the specified file. 136.El 137.Sh EXAMPLES 138This example dumps the DSDT from physical memory to foo.dsdt. 139It also prints the contents of various system tables and disassembles 140the AML contained in the DSDT to stdout, redirecting the output 141to foo.asl. 142.Bd -literal -offset indent 143# acpidump -t -d -o foo.dsdt > foo.asl 144.Ed 145.Pp 146This example reads a DSDT file and disassembles it to stdout. 147Verbose messages are enabled. 148.Bd -literal -offset indent 149# acpidump -v -d -f foo.dsdt 150.Ed 151.Sh BUGS 152In the current implementation, 153.Nm 154doesn't dump the 155Secondary System Descriptor Table (SSDT), 156Embedded Controller Descriptor Table (ECDT), 157or BOOT structures. 158.Sh FILES 159.Bl -tag -width /dev/mem 160.It Pa /dev/mem 161.El 162.Sh SEE ALSO 163.Xr acpi 4 , 164.Xr mem 4 , 165.Xr acpiconf 8 , 166.Xr acpidb 8 , 167.Xr iasl 8 168.Sh AUTHORS 169.An Doug Rabson Aq dfr@FreeBSD.org 170.An Mitsuru IWASAKI Aq iwasaki@FreeBSD.org 171.An Yasuo YOKOYAMA Aq yokoyama@jp.FreeBSD.org 172.Pp 173.An -nosplit 174Some contributions made by 175.An Chitoshi Ohsawa Aq ohsawa@catv1.ccn-net.ne.jp , 176.An Takayasu IWANASHI Aq takayasu@wendy.a.perfect-liberty.or.jp , 177.An Yoshihiko SARUMARU Aq mistral@imasy.or.jp , 178.An Hiroki Sato Aq hrs@FreeBSD.org , 179.An Michael Lucas Aq mwlucas@blackhelicopters.org 180and 181.An Michael Smith Aq msmith@FreeBSD.org . 182.Sh HISTORY 183The 184.Nm 185utility first appeared in 186.Fx 5.0 187and was rewritten to use 188.Xr iasl 8 189for 190.Fx 5.2 . 191