Linux系统中ACPI Table读取与解析

Linux Read ACPI Table Tools.

ACPI tools的安装：

#yum install acpica-tools

或者到下面链接下载源码：

https://www.acpica.org/downloads

下面示例是解析SSDT1表的步骤。

#acpidump -o ACPI_table.out

#acpixtract -a ACPI_table.out 

Intel ACPI Component Architecture
ACPI Binary Table Extraction Utility version 20150619-64
Copyright (c) 2000 – 2015 Intel Corporation
Acpi table [BDAT] – 48 bytes written to bdat.dat
Acpi table [APIC] – 772 bytes written to apic.dat
Acpi table [BERT] – 48 bytes written to bert.dat
Acpi table [DMAR] – 272 bytes written to dmar.dat
Acpi table [DSDT] – 177247 bytes written to dsdt.dat
Acpi table [EINJ] – 336 bytes written to einj.dat
Acpi table [FACP] – 268 bytes written to facp.dat
Acpi table [FACS] – 64 bytes written to facs.dat
Acpi table [ERST] – 560 bytes written to erst.dat
Acpi table [FIDT] – 156 bytes written to fidt.dat
Acpi table [FPDT] – 68 bytes written to fpdt.dat
Acpi table [HEST] – 168 bytes written to hest.dat
Acpi table [HPET] – 56 bytes written to hpet.dat
Acpi table [MCEJ] – 304 bytes written to mcej.dat
Acpi table [MCFG] – 60 bytes written to mcfg.dat
Acpi table [PMCT] – 100 bytes written to pmct.dat
Acpi table [PRAD] – 258 bytes written to prad.dat
Acpi table [SPMI] – 64 bytes written to spmi.dat
Acpi table [UEFI] – 66 bytes written to uefi.dat
Acpi table [WDDT] – 64 bytes written to wddt.dat
Acpi table [SSDT] – 60841 bytes written to ssdt1.dat
Acpi table [SSDT] – 8516 bytes written to ssdt2.dat
Acpi table [SSDT] – 100 bytes written to ssdt3.dat

#iasl -d ssdt1.dat
intel ACPI Component Architecture
ASL+ Optimizing Compiler version 20150619-64
Copyright (c) 2000 – 2015 Intel Corporation
Reading ACPI table from file ssdt1.dat – Length 00060841 (0x00EDA9)
ACPI: SSDT 0x0000000000000000 00EDA9 (v01 ALASKA PmMgt 00000001 INTL 20120913)
Acpi table [SSDT] successfully installed and loaded
Pass 1 parse of [SSDT]
Pass 2 parse of [SSDT]
Parsing Deferred Opcodes (Methods/Buffers/Packages/Regions)
Parsing completed
Disassembly completed
ASL Output: ssdt1.dsl – 632824 bytes
#

ssdt1.dsl文件格式为文本文件，可以直接查看其中的内容了。

acpidump – dump a system’s ACPI tables to an ASCII file
acpixtract – convert ASCII acpidump output to raw binary table
turbostat – gather performance statistics

NAME
acpidump – dump a system’s ACPI tables to an ASCII file
acpixtract – convert ASCII acpidump output to raw binary table
turbostat – gather performance statistics

SYNOPSIS
acpidump [options]
acpixtract [options] [filename]
turbostat [options] [command [arg]…]

DESCRIPTION
This manual page documents briefly the acpidump , acpixtract and
turbostat commands.

turbostat reads hardware registers and gather statistics on the
processor clock frequency and C-state usage. Works properly on Nehalem
and newer processors and on Linux kernel 2.6.30 and later versions.

OPTIONS
acpidump options are as follow:

-a, –addr 0x1234
    look for tables at this phisical address

-t, –table DSDT
  only dump table with DSDT signature

-o, –output filename
  redirect output from stdin to filename

-b, –binary
  dump data in binary form rather than in hex-dump format

-l, –lenght 0x456
  works only with –addr, dump phisical memory region without
  trying to understand it’s contents

-s, –skip 2
  skip 2 tables of the given name and output only 3rd one

-h, –help
  outputs an help message

OPTIONS
acpixtract options are as follow:

-a extract all tables, not just DSDT/SSDT

-l list table summaries, do not extract

-s<Signature>
  Extract all tables named <Signature>

OPTIONS
turbostat options are as follow:

-v makes turbostat more verbose

-i <sec>
  polling interval, default is 5

When given a command turbostat runs it and outputs statistics gathered
while the program was running.

EXAMPLES
Dump the DSDT table to the file DSDT.aml in binary format (this can be
disassembled later with iasl(1)):
acpidump -b -t DSDT -o DSDT.aml

Show the FACP table:
acpidump -t FACP > FACP.dat
acpixtract -a FACP.dat
iasl -d FACP.dat

Dump and extract all ACPI tables:
acpidump -o DSDT.dat
acpixtract -a

Parse APIC tables:
acpidump -o DSDT.dat
acpixtract -sAPIC DSDT.dat

SEE ALSO
iasl(1),

IASL：ACPI Source Language compiler/decompiler

SYNOPSIS
iasl [options] [input file]

DESCRIPTION
This manual page documents briefly the iasl command. The option list is
taken from the iasl interactive help.

iasl is an ASL compiler and decompiler.

OPTIONS
General Output
-p <prefix>
  Specify filename prefix for all output files (including .aml)

-vi Less verbose errors and warnings for use with IDEs

-vo Enable optimization comments

-vr Disable remarks

-vs Disable signon

AML Output Files
-s<a|c>
  Create AML in assembler or C source file (*.asm or *.c)

-i<a|c>
  Create assembler or C include file (*.inc or *.h)

-t<a|c>
  Create AML in assembler or C hex table (*.hex)

AML Code Generation
-oa Disable all optimizations (compatibility mode)

-of Disable constant folding

-oi Disable integer optimization to Zero/One/Ones

-on Disable named reference string optimization

-r<Revision>
  Override table header Revision (1-255)

Listings
-l Create mixed listing file (ASL source and AML) (*.lst)

-ln Create namespace file (*.nsp)

-ls Create combined source file (expanded includes) (*.src)

AML Disassembler
-d [file]
  Disassemble AML to ASL source code file (*.dsl)

-dc [file]
  Disassemble AML and immediately compile it
(Obtain DSDT from current system if no input file)

-e Generate External() statements for unresolved symbols

-g Get ACPI tables and write to files (*.dat)

Miscellaneous
-a Verify source file is entirely ASCII text (0x00-0x7F)

Help
-h Additional help and compiler debug options

-hc Display operators allowed in constant expressions

-hr Display ACPI reserved method names