Building the Power-Efficient PC: A Developer's Guide to ACPI Power Management
This book provides developers and integrators with practical knowledge and design techniques for building PCs that address the increasing demand for energy conservation.
TABLE OF CONTENTS Building the Power-Efficient PC: A Developer's Guide to ACPI Power Management
F-I
- Field Effect Transistor (FET)
- A FET is a transconductance device whereby a variation in input voltage causes a variation in output current.
- Firmware ACPI Control Structure (FACS)
- The FACS is a structure in read/write memory that the BIOS uses for handshaking between the firmware and the OS. The FACS is passed to an ACPI-compatible OS via the Fixed ACPI Description Table (FADT). The FACS contains the system s hardware signature at last boot, the firmware waking vector, and the Global Lock.
- Fixed ACPI Description Table (FADT)
- The FADT contains the ACPI Hardware Register Block implementation and configuration details that the OS needs to direct management of the ACPI Hardware Register Blocks, as well as the physical address of the DSDT that contains other platform implementation and configuration details. An OEM must provide a FADT to an ACPI-compatible OS in the RSDT/XSDT.
- Fixed Features
- Fixed features refer to a set of features offered by an ACPI interface. The ACPI specification places restrictions on where and how the hardware programming model is generated. All fixed features, if used, are implemented as described in the ACPI specification so that OSPM can directly access the fixed feature registers.
- Fixed Feature Events
- Fixed feature events occur at the ACPI interface when a paired set of status and event bits in the fixed feature registers are set at the same time. When a fixed feature event occurs, a system control interrupt (SCI) is generated. For ACPI fixed feature events, OSPM (or an ACPI-aware driver) acts as...
Copyright Intel Corporation 2001 under license agreement with Books24x7
