Acpi; Configuration; Power Management; Table 14. Summary Of Power Management Features - Dell POWEREDGE R510 Technical Manualbook

Dell
Power Inventory (PSU, CPU, and DIMM mismatch
checking)
Support for Multiple power profiles
Static Maximum Performance Mode
OS Control(DBS)
Active Power Controller
Custom

9.2 ACPI

BIOS is compliant with ACPI version 2.0a. ACPI features consist of two types: configuration features and
power management features. The features supported on this system are described below.
9.2.1

Configuration

•
PCI Routing Table (_PRT). Each host bus has a PCI routing table in the DSDT that describes how PCI
interrupt lines are connected to the chipset. If the OS chooses to use the IOAPICs, an APIC-mode table
tells which PIRQ is connected to which IOAPIC pin. If the OS chooses to use only the legacy PICs, a
PIC-mode table provides control methods the OS can use to program the South Bridge's interrupt
router.
•
Reporting Usage of Resources (_CRS, _STA). DSDT objects report resources that are produced
and/or consumed by each bus and each onboard device. The following resources are reported:
memory, I/O, DMA, IRQ, and bus number resources. Bus number resources, PCI memory regions, and
PCI I/O regions are updated dynamically in the DSDT after all buses have been enumerated by the
BIOS.
•
Dynamic Resource Allocation (_PRS, _SRS, _DIS). DSDT _PRS objects tell the OS what resources
can be assigned to a given device. _SRS and _DIS methods in the DSDT allow the OS to change a
device's resource settings or disable the device.
9.2.2

Power Management

Power management features come in two flavors: fixed or generic. Fixed features use bits defined in the ACPI
specification for specific capabilities. The fixed feature bits give the OS complete control over the power
management of a device since the location of the bits is given to the OS in the FACP table. Thus, a driver can
directly access bits to control a device's power management. Generic features have defined enable and status
bits, but the functionality is not fully visible to the OS. Dell provides ASL code to handle the details of generic
features, allowing the OS to intelligently communicate with system-specific hardware.
Feature Type
ACPI Mode Fixed
Switch
Sleep States Fixed
PowerEdge R510 Technical Guide
Table 14. Summary of Power Management Features
Enable/Status/ Ctrl
bit location
ICH-10
ICH-10
Description
The OS uses the SCI_EN bit in ICH to switch from legacy mode
to ACPI mode.
Supported states: S0 (Working), S4-OS (Hibernation in Windows
OS), and S5 (Soft-off).
S1 (also called standby or suspend) and S3 are not supported.
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