Advanced Configuration and Power Interface Specification

ACPI Software Programming Model
Name Description Heading
_LID
_LIN
Lid – returns the open/closed status of the lid on a mobile
system.
Lines in Use - Handshake lines in use in a UART SerialBus
connection, resource descriptor field
Section 9.4.1 page 506
Section 19.6 page 809
_LL Low Level – interrupt polarity, resource descriptor field. Section 19.2.8 page 778
_LPI Low Power Idle States – returns the list of low power idle Section 8.4.4.3 page 444
states supported by a processor or processor container.
_MAF Maximum Address Fixed – resource descriptor field. Section 19.2.8 page 778
_MAT Multiple Apic Table Entry – returns a list of MADT APIC Section 6.2.10 page 311
structure entries.
_MAX Maximum Base Address – resource descriptor field. Section 19.2.8 page 778
_MBM Memory Bandwidth Monitoring Data – returns bandwidth Section 9.12.2.1 page 521
monitoring data for a memory device.
_MEM Memory Attributes – resource descriptor field. Section 19.2.8 page 778
_MIF Minimum Address Fixed – resource descriptor field. Section 19.2.8 page 778
_MIN Minimum Base Address – resource descriptor field. Section 19.2.8 page 778
_MLS Multiple Language String – returns a device description in
multiple languages.
Section 6.1.7 page 282
_MOD Mode –Resource descriptor field Section 19.6,
Section 19.6.54
page 809
page 843
_MSG Message – sets the system message waiting status indicator. Section 9.1.2 page 497
_MSM Memory Set Monitoring – sets bandwidth monitoring
Section 9.12.2.2 page 522
parameters for a memory device.
_MTL Minimum Throttle Limit – returns the minimum throttle limit of a Section 11.4.8 page 613
specific thermal
_MTP Memory Type – resource descriptor field. Section 19.2.8 page 778
_NTT Notification Temperature Threshold – returns a threshold for Section 11.4.9 page 613
device temperature change that requires platform notification.
_OFF Off – sets a power resource to the off state. Section 7.2.2 page 392
_ON On – sets a power resource to the on state. Section 7.2.3 page 393
_OS Operating System – returns a string that identifies the
Section 5.7.3 page 273
operating system.
_OSC Operating System Capabilities – inform AML of host features Section 6.2.11 page 312
and capabilities.
_OSI Operating System Interfaces – returns supported interfaces, Section 5.7.2 page 269
behaviors, and features.
_OST Ospm Status Indication – inform AML of event processing Section 6.3.5 page 335
status.
_PAI Power Averaging Interval – sets the averaging interval for a Section 10.4.4 page 589
power meter.
_PAR Parity – Parity for a UART SerialBus connection, resource
descriptor field
Section 19.6 page 809
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