Method and controller for power management

A controller capable of resuming a system from a sleep state, comprising:

• one or more inputs, configured to receive input from a processor and to receive requests related to system execution states;
• one or more outputs, configured to provide output to a system memory and a nonvolatile memory;
• wherein the controller is configured to:
• receive a request to resume operation of the system from the sleep state to an executing state via the one or more inputs;
• begin a restoring process to restore the system to the executing state, wherein the restoring process comprises using the one or more outputs to initiate loading of information from the nonvolatile memory to the system memory;
• receive a request to access a portion of the system memory via the one or more inputs, wherein the request refers to an address of the system memory in the executing state, and wherein said receiving the request is performed prior to completion of the restoring process.

A system capable of power management, comprising:

• a processor;
• a nonvolatile memory medium coupled to the processor;
• a system memory medium coupled to the processor, wherein the processor is configured to:
• in response to a request to enter a sleep state for a system, perform one or more functions to enter the sleep state in response to the request to enter the sleep state;
• store context of the system memory medium in the nonvolatile memory in response to the request to enter the sleep state;
• remove power to the system memory medium after said storing the context of the system memory medium in the NVM in response to the request to enter the sleep state;
• and
• a system chipset coupled to the processor, the nonvolatile memory medium, and the system memory medium, wherein the system chipset is configured to:
• in response to a request to resume operation of the system from the sleep state to an executing state, begin a restoring process to restore the system to the executing state, wherein the restoring process comprises loading information from the nonvolatile memory medium to the system memory medium.