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微软官方文档。! u' M6 d9 a6 h2 s: G
Kernel-mode device drivers are able to evaluate ACPI control methods via I/O control codes (IOCTLs). Typically, a driver evaluates ACPI control methods to initiate or configure platform-specific functionality.8 a8 j. b# o. U1 ]' T7 N% p6 ^% x8 E
An ACPI control method is a definition of how to interrogate or adjust system hardware. Control methods are written in the ACPI Machine Language (AML) and are interpreted by the ACPI driver in Microsoft® Windows®. These objects are loaded from the system definition in firmware into the ACPI namespace.
+ F/ v0 v+ N% p7 c" D Drivers can evaluate ACPI control methods within the namespace of the device object on which they are loaded. This also includes control methods in the namespace of child objects. A driver must meet the following requirements when evaluating ACPI control methods:' D0 T9 x# I F5 ?1 |+ K
• Only WDF or WDM drivers are supported.
# |& `, U* A( L1 e# R• Drivers may evaluate control methods only within the namespace of the device object on which they are loaded. This includes the namespace of child device objects. |
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