Power control system and method
First Claim
1. A power control method comprising:
- performing a reduced power detection process for detecting a reduced power state, wherein said reduced power state is associated with an expedited recovery;
performing a reduced power state entry process;
performing a reduced power state entry process; and
performing an expedited recovery process in accordance with detection of a recovery indication event.
1 Assignment
0 Petitions
Accused Products
Abstract
An efficient and effective power control system method are described with expedited recovery from a reduced power state. In one embodiment, a present invention power control system includes performing a reduced power detection process for detecting a reduced power state, wherein the reduced power state is associated with an expedited recovery; performing a reduced power state entry process; performing a recovery detection process for detecting a recover indication event; and performing an expedited recovery process in accordance with detection of a recovery indication event. The reduced power state entry process comprises saving an expedited recovery information in registers of an always on domain and putting an external memory in self refresh mode to preserve a system context while a chip is turned off. The expedited recovery process comprises determining whether to proceed with the expedited recovery process; initializing memory controller registers and directing memory controller to exit self refresh; validating system context recovered from memory using keys stored in an always on domain; jumping to recovery instructions in memory; restoring operating system information and returning to operating system control.
-
Citations
20 Claims
-
1. A power control method comprising:
-
performing a reduced power detection process for detecting a reduced power state, wherein said reduced power state is associated with an expedited recovery; performing a reduced power state entry process; performing a reduced power state entry process; and performing an expedited recovery process in accordance with detection of a recovery indication event. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. A power control system comprising:
-
an always on domain for storing information associated with initiation of an expedited recovery from a reduced power state; and a power management unit for directing said expedited recovery from said reduced power state based upon an indication from said always on component. - View Dependent Claims (12, 13, 14, 15, 16)
-
-
17. A power control method comprising:
-
setting a power state indicator to an idle value; alternating between idle state associated with said idle value and active states based on power client requests; determining if it is safe to enter a reduced power state based on said power sate indicator; changing said power sate indicator value base upon entry to a reduced power state; and exiting said reduced power state. - View Dependent Claims (18, 19, 20)
-
Specification