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.
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10 .\" modification, are permitted provided that the following conditions
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14 .\" 2. Redistributions in binary form must reproduce the above copyright
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16 .\" documentation and/or other materials provided with the distribution.
18 .\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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21 .\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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23 .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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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 $
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 a DSDT output file and optionally also disassemble it.
73 is invoked without the
75 option, it will read ACPI tables from physical memory via
77 First it searches for the RSDP
78 (Root System Description Pointer),
79 which has the signature
81 and then gets the RSDT
82 (Root System Description Table),
83 which includes a list of pointers to physical memory addresses
85 The RSDT itself and all other tables linked from RSDT are generically
87 (System Description Tables)
88 and their header has a common format which consists of items
89 such as Signature, Length, Revision, Checksum, OEMID, OEM Table ID,
90 OEM Revision, Creator ID and Creator Revision.
95 utility dumps contents of the following tables:
97 .Bl -tag -offset indent -width 12345 -compact
106 The RSDT contains a pointer to the physical memory address of the FACP
107 (Fixed ACPI Description Table).
108 The FACP defines static system information about power management support
109 (ACPI Hardware Register Implementation)
110 such as interrupt mode (INT_MODEL),
111 SCI interrupt number, SMI command port (SMI_CMD)
112 and the location of ACPI registers.
113 The FACP also has a pointer to a physical memory address for the DSDT.
114 While the other tables are fixed format,
115 the DSDT consists of free-formatted AML data.
117 The following options are supported by
119 .Bl -tag -width indent
121 Disassemble the DSDT into ASL using
123 and print the results to stdout.
125 Dump the contents of the various fixed tables listed above.
127 Displays usage and exit.
129 Enable verbose messages.
130 .It Fl f Ar dsdt_input
131 Load the DSDT from the specified file instead of physical memory.
132 Since only the DSDT is stored in the file, the
134 flag may not be used with this option.
135 .It Fl o Ar dsdt_output
136 Store the DSDT data block from physical memory into the specified file.
139 .Bl -tag -width /dev/mem
143 This example dumps the DSDT from physical memory to foo.dsdt.
144 It also prints the contents of various system tables and disassembles
145 the AML contained in the DSDT to stdout, redirecting the output
147 .Bd -literal -offset indent
148 # acpidump -t -d -o foo.dsdt > foo.asl
151 This example reads a DSDT file and disassembles it to stdout.
152 Verbose messages are enabled.
153 .Bd -literal -offset indent
154 # acpidump -v -d -f foo.dsdt
165 utility first appeared in
167 and was rewritten to use
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
177 Some 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
184 .An Michael Smith Aq msmith@FreeBSD.org .
186 In the current implementation,
189 Secondary System Descriptor Table (SSDT),
190 Embedded Controller Descriptor Table (ECDT),