Software Functional Overview
1.The OS notifies the hardware of the new cooling mode by running the Set Cooling Policy (_SCP) control method.
2.When the hardware receives the notification, it can set a new temperature for both cooling policies and notify the OS that the thermal zone policy temperatures have changed.
3.The OS
Resetting Cooling Temperatures to Adjust to Bay Device Insertion or Removal
The hardware can adjust the thermal zone temperature to accommodate the maximum operating temperature of a bay device as necessary. For example,
1.Hardware detects that a device was inserted into or removed from the bay and resets the _PSV and/or _ACx and then notifies the OS of the thermal and device insertion events.
2.The OS reenumerates the devices and reevaluates _PSV and _ACx.
Resetting Cooling Temperatures to Implement Hysteresis
An OEM can build hysteresis into platform thermal design by dynamically resetting cooling temperatures. For example,
1.When the heat increases to the temperature designated by _ACx, the OS will turn on the associated active cooling device and the hardware will reset the ACx value to a lower temperature.
2.The hardware will then run the Notify command and the OS will reevaluate the new temperatures. Because of the lower _ACx value now, the fan will be turned off at a lower temperature than when turned on.
3.When the temperature hits the lower _ACx value, the OS will turn off the fan and reevaluate the control methods when notified.
FIC A360 Service Manual |
