1 .\" ACPI (ACPI Package)
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.
9 .\" Redistribution and use in source and binary forms, with or without
10 .\" modification, are permitted provided that the following conditions
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.
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
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30 .\" $FreeBSD: src/usr.sbin/acpi/acpidump/acpidump.8,v 1.23 2005/02/14 16:32:32 njl Exp $
31 .\" $DragonFly: src/usr.sbin/acpi/acpidump/acpidump.8,v 1.8 2007/01/10 11:54:45 hsu Exp $
38 .Nd dump ACPI tables and ASL
45 .Op Fl f Ar dsdt_input
46 .Op Fl o Ar dsdt_output
50 utility analyzes ACPI tables in physical memory and can dump them to a file.
56 (ACPI Machine Language)
57 found in these tables and dump them as ASL
58 (ACPI Source Language)
61 ACPI tables have an essential data block (the DSDT,
62 Differentiated System Description Table)
63 that includes information used on the kernel side such as
64 detailed information about PnP hardware, procedures for controlling
65 power management support, and so on.
68 utility can extract the DSDT data block from physical memory and store it into
69 an output file and optionally also disassemble it.
70 If any Secondary System Description Table
72 entries exist, they will also be included in the output file and disassembly.
76 is invoked without the
78 option, it will read ACPI tables from physical memory via
80 First it searches for the RSDP
81 (Root System Description Pointer),
82 which has the signature
84 and then gets the RSDT
85 (Root System Description Table),
86 which includes a list of pointers to physical memory addresses
88 The RSDT itself and all other tables linked from RSDT are generically
90 (System Description Tables)
91 and their header has a common format which consists of items
92 such as Signature, Length, Revision, Checksum, OEMID, OEM Table ID,
93 OEM Revision, Creator ID and Creator Revision.
98 utility dumps contents of the following tables:
100 .Bl -tag -offset indent -width 12345 -compact
112 The RSDT contains a pointer to the physical memory address of the FACP
113 (Fixed ACPI Description Table).
114 The FACP defines static system information about power management support
115 (ACPI Hardware Register Implementation)
116 such as interrupt mode (INT_MODEL),
117 SCI interrupt number, SMI command port (SMI_CMD)
118 and the location of ACPI registers.
119 The FACP also has a pointer to a physical memory address for the DSDT.
120 While the other tables are fixed format,
121 the DSDT consists of free-formatted AML data.
123 The following options are supported by
125 .Bl -tag -width indent
127 Disassemble the DSDT into ASL using
129 and print the results to stdout.
131 Dump the contents of the various fixed tables listed above.
133 Displays usage and exit.
135 Enable verbose messages.
136 .It Fl f Ar dsdt_input
137 Load the DSDT from the specified file instead of physical memory.
138 Since only the DSDT is stored in the file, the
140 flag may not be used with this option.
141 .It Fl o Ar dsdt_output
142 Store the DSDT data block from physical memory into the specified file.
145 .Bl -tag -width /dev/mem
149 This example dumps the DSDT from physical memory to foo.dsdt.
150 It also prints the contents of various system tables and disassembles
151 the AML contained in the DSDT to stdout, redirecting the output
153 .Bd -literal -offset indent
154 # acpidump -t -d -o foo.dsdt > foo.asl
157 This example reads a DSDT file and disassembles it to stdout.
158 Verbose messages are enabled.
159 .Bd -literal -offset indent
160 # acpidump -v -d -f foo.dsdt
171 utility first appeared in
173 and was rewritten to use
178 .An Doug Rabson Aq dfr@FreeBSD.org
179 .An Mitsuru IWASAKI Aq iwasaki@FreeBSD.org
180 .An Yasuo YOKOYAMA Aq yokoyama@jp.FreeBSD.org
181 .An Nate Lawson Aq njl@FreeBSD.org
184 Some contributions made by
185 .An Chitoshi Ohsawa Aq ohsawa@catv1.ccn-net.ne.jp ,
186 .An Takayasu IWANASHI Aq takayasu@wendy.a.perfect-liberty.or.jp ,
187 .An Yoshihiko SARUMARU Aq mistral@imasy.or.jp ,
188 .An Hiroki Sato Aq hrs@FreeBSD.org ,
189 .An Michael Lucas Aq mwlucas@blackhelicopters.org
191 .An Michael Smith Aq msmith@FreeBSD.org .
193 The current implementation does not dump the BOOT structure or
194 other miscellaneous tables.