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 $
37 .Nd dump ACPI tables and ASL
44 .Op Fl f Ar dsdt_input
45 .Op Fl o Ar dsdt_output
49 utility analyzes ACPI tables in physical memory and can dump them to a file.
55 (ACPI Machine Language)
56 found in these tables and dump them as ASL
57 (ACPI Source Language)
60 ACPI tables have an essential data block (the DSDT,
61 Differentiated System Description Table)
62 that includes information used on the kernel side such as
63 detailed information about PnP hardware, procedures for controlling
64 power management support, and so on.
67 utility can extract the DSDT data block from physical memory and store it into
68 an output file and optionally also disassemble it.
69 If any Secondary System Description Table
71 entries exist, they will also be included in the output file and disassembly.
75 is invoked without the
77 option, it will read ACPI tables from physical memory via
79 First it searches for the RSDP
80 (Root System Description Pointer),
81 which has the signature
83 and then gets the RSDT
84 (Root System Description Table),
85 which includes a list of pointers to physical memory addresses
87 The RSDT itself and all other tables linked from RSDT are generically
89 (System Description Tables)
90 and their header has a common format which consists of items
91 such as Signature, Length, Revision, Checksum, OEMID, OEM Table ID,
92 OEM Revision, Creator ID and Creator Revision.
97 utility dumps contents of the following tables:
99 .Bl -tag -offset indent -width 12345 -compact
111 The RSDT contains a pointer to the physical memory address of the FACP
112 (Fixed ACPI Description Table).
113 The FACP defines static system information about power management support
114 (ACPI Hardware Register Implementation)
115 such as interrupt mode (INT_MODEL),
116 SCI interrupt number, SMI command port (SMI_CMD)
117 and the location of ACPI registers.
118 The FACP also has a pointer to a physical memory address for the DSDT.
119 While the other tables are fixed format,
120 the DSDT consists of free-formatted AML data.
122 The following options are supported by
124 .Bl -tag -width indent
126 Disassemble the DSDT into ASL using
128 and print the results to stdout.
130 Dump the contents of the various fixed tables listed above.
132 Displays usage and exit.
134 Enable verbose messages.
135 .It Fl f Ar dsdt_input
136 Load the DSDT from the specified file instead of physical memory.
137 Since only the DSDT is stored in the file, the
139 flag may not be used with this option.
140 .It Fl o Ar dsdt_output
141 Store the DSDT data block from physical memory into the specified file.
144 .Bl -tag -width /dev/mem
148 This example dumps the DSDT from physical memory to foo.dsdt.
149 It also prints the contents of various system tables and disassembles
150 the AML contained in the DSDT to stdout, redirecting the output
152 .Bd -literal -offset indent
153 # acpidump -t -d -o foo.dsdt > foo.asl
156 This example reads a DSDT file and disassembles it to stdout.
157 Verbose messages are enabled.
158 .Bd -literal -offset indent
159 # acpidump -v -d -f foo.dsdt
170 utility first appeared in
172 and was rewritten to use
177 .An Doug Rabson Aq Mt dfr@FreeBSD.org
178 .An Mitsuru IWASAKI Aq Mt iwasaki@FreeBSD.org
179 .An Yasuo YOKOYAMA Aq Mt yokoyama@jp.FreeBSD.org
180 .An Nate Lawson Aq Mt njl@FreeBSD.org
183 Some contributions made by
184 .An Chitoshi Ohsawa Aq Mt ohsawa@catv1.ccn-net.ne.jp ,
185 .An Takayasu IWANASHI Aq Mt takayasu@wendy.a.perfect-liberty.or.jp ,
186 .An Yoshihiko SARUMARU Aq Mt mistral@imasy.or.jp ,
187 .An Hiroki Sato Aq Mt hrs@FreeBSD.org ,
188 .An Michael Lucas Aq Mt mwlucas@blackhelicopters.org
190 .An Michael Smith Aq Mt msmith@FreeBSD.org .
192 The current implementation does not dump the BOOT structure or
193 other miscellaneous tables.