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ACPI: Difference between revisions
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Not to be confused with [[APIC]]. The second worst type of coder in the world is the kind that [http://geekz.co.uk/lovesraymond/archive/so-i-married-a-kernel-programmer shows up with a bloody shovel]. The worst kind is a [http://dankamongmen.livejournal.com/#entry_298962 BIOS coder]. Upwards and onwards to ACPI, a creation of the [http://www.acpi.info/ Advanced Configuration and Power Interface] group. | Not to be confused with [[APIC]]. The second worst type of coder in the world is the kind that [http://geekz.co.uk/lovesraymond/archive/so-i-married-a-kernel-programmer shows up with a bloody shovel]. The worst kind is a [http://dankamongmen.livejournal.com/#entry_298962 BIOS coder]. Upwards and onwards to ACPI, a creation of the [http://www.acpi.info/ Advanced Configuration and Power Interface] group. | ||
== | ==Specifications== | ||
As of September 2019, the current version of ACPI is Revision 6.3, published January 2019. It is now published as part of the [[UEFI]] standards, and administered by the UEFI Forum. | |||
* [https://uefi.org/sites/default/files/resources/ACPI_6_3_final_Jan30.pdf ACPI 6.3] specification | |||
==acpidump/acpixtract== | ==acpidump/acpixtract== | ||
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[recombinator](0) $</pre> | [recombinator](0) $</pre> | ||
== | ==DSDT== | ||
Differentiated System Description Tables. | |||
<pre> | |||
[recombinator](0) $ sudo acpidump -t DSDT -b -o acpidump.dsdt | |||
[recombinator](0) $ iasl -d acpidump.dsdt | |||
Intel ACPI Component Architecture | |||
AML Disassembler version 20061109 [Mar 19 2009] | |||
Copyright (C) 2000 - 2006 Intel Corporation | |||
Supports ACPI Specification Revision 3.0a | |||
Loading Acpi table from file acpidump.dsdt | |||
Acpi table [DSDT] successfully installed and loaded | |||
Pass 1 parse of [DSDT] | |||
Pass 2 parse of [DSDT] | |||
Parsing Deferred Opcodes (Methods/Buffers/Packages/Regions) | |||
..................................................... etc | |||
Parsing completed | |||
Disassembly completed, written to "acpidump.dsl" | |||
[recombinator](0) $ </pre> | |||
===Rebuilding a decompiled DSDT=== | |||
<pre>[recombinator](0) $ iasl -tc acpidump.dsl | |||
Intel ACPI Component Architecture | |||
ASL Optimizing Compiler version 20061109 [Mar 19 2009] | |||
Copyright (C) 2000 - 2006 Intel Corporation | |||
Supports ACPI Specification Revision 3.0a | |||
acpidump.dsl 2186: Acquire (MUT0, 0x0FFF) | |||
Warning 1103 - Possible operator timeout is ignored ^ | |||
ASL Input: acpidump.dsl - 5185 lines, 178349 bytes, 1615 keywords | |||
AML Output: acpidump.aml - 15771 bytes 546 named objects 1069 executable opcodes | |||
Compilation complete. 0 Errors, 1 Warnings, 0 Remarks, 597 Optimizations | |||
[recombinator](0) $ </pre> | |||
==SRAT== | |||
[http://lwn.net/Articles/7177/ Linux in 2009] gained support for parsing of the BIOS-provided SRAT table ([http://mail-index.netbsd.org/port-amd64/2009/11/23/msg001026.html NetBSD also had support] by later that year). The SRAT describes memory and processor topology, and the hot-pluggable status of all. | |||
* Use the CONFIG_X86_64_ACPI_NUMA kernel option to enable SRAT-based enumeration of [[NUMA]]. | |||
==See also== | ==See also== | ||
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* Legacy info regarding [http://acpi.sourceforge.net/dsdt/index.php Linux DSDT] replacement | * Legacy info regarding [http://acpi.sourceforge.net/dsdt/index.php Linux DSDT] replacement | ||
* Intel's [http://www.intel.com/technology/IAPC/acpi/ ACPI] page, including <tt>iasl</tt>. | * Intel's [http://www.intel.com/technology/IAPC/acpi/ ACPI] page, including <tt>iasl</tt>. | ||
* The MADT table can be used to discover [[SMP]] topology | * The MADT table can be used to discover [[SMP on x86|SMP]] topology | ||
[[Category: x86]] | [[Category: x86]] | ||
Latest revision as of 13:52, 17 September 2019
Not to be confused with APIC. The second worst type of coder in the world is the kind that shows up with a bloody shovel. The worst kind is a BIOS coder. Upwards and onwards to ACPI, a creation of the Advanced Configuration and Power Interface group.
Specifications
As of September 2019, the current version of ACPI is Revision 6.3, published January 2019. It is now published as part of the UEFI standards, and administered by the UEFI Forum.
- ACPI 6.3 specification
acpidump/acpixtract
acpidump differs subtly and annoyingly between Debian and FreeBSD.
[recombinator](0) $ sudo acpidump -o recombinator.acpi
[recombinator](0) $ acpixtract -l recombinator.acpi
Signature Length OemId OemTableId OemRevision CompilerId CompilerRevision
DSDT 17452 "INTEL " "DG965WH " 000006C1 "MSFT" 01000013
FACS 64
FACP 116 "INTEL " "DG965WH " 000006C1 "MSFT" 01000013
APIC 120 "INTEL " "DG965WH " 000006C1 "MSFT" 01000013
WDDT 64 "INTEL " "DG965WH " 000006C1 "MSFT" 01000013
MCFG 60 "INTEL " "DG965WH " 000006C1 "MSFT" 01000013
ASF! 166 "INTEL " "DG965WH " 000006C1 "MSFT" 01000013
HPET 56 "INTEL " "DG965WH " 000006C1 "MSFT" 01000013
SSDT 524 "INTEL " "CpuPm " 000006C1 "MSFT" 01000013
SSDT 373 "INTEL " "Cpu0Ist " 000006C1 "MSFT" 01000013
SSDT 373 "INTEL " "Cpu1Ist " 000006C1 "MSFT" 01000013
SSDT 373 "INTEL " "Cpu2Ist " 000006C1 "MSFT" 01000013
SSDT 373 "INTEL " "Cpu3Ist " 000006C1 "MSFT" 01000013
RSDT 80 "INTEL " "DG965WH " 000006C1 " " 01000013
RSDP "INTEL "
Found 15 ACPI tables [20060324]
[recombinator](0) $ acpixtract recombinator.acpi
Acpi table [DSDT] - 17452 bytes written to DSDT.dat
Acpi table [SSDT] - 524 bytes written to SSDT1.dat
Acpi table [SSDT] - 373 bytes written to SSDT2.dat
Acpi table [SSDT] - 373 bytes written to SSDT3.dat
Acpi table [SSDT] - 373 bytes written to SSDT4.dat
Acpi table [SSDT] - 373 bytes written to SSDT5.dat
[recombinator](0) $ iasl -d DSDT.dat
Intel ACPI Component Architecture
AML Disassembler version 20061109 [May 15 2007]
Copyright (C) 2000 - 2006 Intel Corporation
Supports ACPI Specification Revision 3.0a
Loading Acpi table from file DSDT.dat
Acpi table [DSDT] successfully installed and loaded
Pass 1 parse of [DSDT]
Pass 2 parse of [DSDT]
Parsing Deferred Opcodes (Methods/Buffers/Packages/Regions)
Parsing completed
Disassembly completed, written to "DSDT.dsl"
[recombinator](0) $
DSDT
Differentiated System Description Tables.
[recombinator](0) $ sudo acpidump -t DSDT -b -o acpidump.dsdt [recombinator](0) $ iasl -d acpidump.dsdt Intel ACPI Component Architecture AML Disassembler version 20061109 [Mar 19 2009] Copyright (C) 2000 - 2006 Intel Corporation Supports ACPI Specification Revision 3.0a Loading Acpi table from file acpidump.dsdt Acpi table [DSDT] successfully installed and loaded Pass 1 parse of [DSDT] Pass 2 parse of [DSDT] Parsing Deferred Opcodes (Methods/Buffers/Packages/Regions) ..................................................... etc Parsing completed Disassembly completed, written to "acpidump.dsl" [recombinator](0) $
Rebuilding a decompiled DSDT
[recombinator](0) $ iasl -tc acpidump.dsl Intel ACPI Component Architecture ASL Optimizing Compiler version 20061109 [Mar 19 2009] Copyright (C) 2000 - 2006 Intel Corporation Supports ACPI Specification Revision 3.0a acpidump.dsl 2186: Acquire (MUT0, 0x0FFF) Warning 1103 - Possible operator timeout is ignored ^ ASL Input: acpidump.dsl - 5185 lines, 178349 bytes, 1615 keywords AML Output: acpidump.aml - 15771 bytes 546 named objects 1069 executable opcodes Compilation complete. 0 Errors, 1 Warnings, 0 Remarks, 597 Optimizations [recombinator](0) $
SRAT
Linux in 2009 gained support for parsing of the BIOS-provided SRAT table (NetBSD also had support by later that year). The SRAT describes memory and processor topology, and the hot-pluggable status of all.
- Use the CONFIG_X86_64_ACPI_NUMA kernel option to enable SRAT-based enumeration of NUMA.
See also
- Linux ACPI page at http://www.lesswatts.org/projects/acpi/
- Legacy info regarding Linux DSDT replacement
- Intel's ACPI page, including iasl.
- The MADT table can be used to discover SMP topology
