ACPIInWindowsVista.ppt

ACPI In Windows Vista Allen MarshallLead Program ManagerWindows Core Platform ArchitectureMicrosoft Corporation Agenda ACPI Support in Windows Vista ACPI Version support Machine Role Flags Screen Brightness _OSI Processor Power Management PCI Express ACPI Driver Interface ACPI Test and Debugging Common ACPI Errors ACPI Support In WindowsOverview Windows Vista requires ACPI Non-ACPI HALs are not available in Windows Vista Legacy power management and BIOS configuration implementations are no longer supported Both ACPI and Windows have seen continual advancements ACPI offers significant system advantages Close platform integration with the operating system Greatly increased reliability, diagnosability Windows ACPI support promotes faster system development Rich ACPI feature support Extensive ACPI debugging support ACPI table overload for rapid system bring-up ACPI Support In WindowsMicrosoft ASL compiler update Updated ASL compiler now available Version 3.0.0 released Supports ACPI 2.0, 3.0 objects required for Windows Vista Provides several features to facilitate development and debugging Saves ACPI tables from firmware to disk file Un-assembling AML into ASL Loading ACPI tables from disk, bypassing BIOS ROMs See details later in this presentation Available for download from Windows Hardware and Driver Central (WHDC) /fwlink/?LinkId=66535 ACPI In Windows VistaACPI version support Windows Vista supports select objects from ACPI 2.0, 3.0 specifications Windows operating systems typically do not support all features of any one version of the ACPI specification Key elements from ACPI are selected to support development of emerging hardware, e.g. PCI Express Mobile dual core processors High Performance Event Timers (HPET) ACPI In Windows VistaUsing RSDT versus XSDT In Windows Vista, if the RSDP Revision field is 2 Windows will use the XSDT in place of the RSDT Windows will calculate the checksum of the entire RSDP Must match the Extended Checksum field En