Delegating component power control
First Claim
1. An apparatus for processing data comprising:
- a component capable of operating in at least two power modes;
component power control circuitry communicatively coupled to the component to cause the component to operate in a selected power mode of the at least two power modes;
anda system power controller comprising instruction execution circuitry to execute a set of instructions to control operation of the component power control circuitry by setting a power mode lock condition in the component power control circuitry, wherein when the power mode lock condition is met the component power control circuitry cannot change the selected power mode of the component,wherein the component power control circuitry comprises interrupt generation circuitry to issue an interrupt to the system power controller to signal that the power mode lock condition is met, andwherein the interrupt generation circuitry is capable of issuing an interrupt to the system power controller to signal a power mode change request to the system power controller whilst the power mode lock condition is met.
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Accused Products
Abstract
An apparatus and a corresponding method of operating the apparatus are disclosed. A component of the apparatus is capable of operating in one of at least two power modes and component power control circuitry which is communicatively coupled to the component causes the component to operate in a selected power mode of those power modes. A system power controller controls operation of the component power control circuitry by setting a power mode lock condition therein. When the power mode lock condition is met the component power control circuitry cannot change the selected power mode of the component. Power control over the component is thus partially delegated from the system power controller to the component power control circuitry.
32 Citations
12 Claims
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1. An apparatus for processing data comprising:
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a component capable of operating in at least two power modes; component power control circuitry communicatively coupled to the component to cause the component to operate in a selected power mode of the at least two power modes; and a system power controller comprising instruction execution circuitry to execute a set of instructions to control operation of the component power control circuitry by setting a power mode lock condition in the component power control circuitry, wherein when the power mode lock condition is met the component power control circuitry cannot change the selected power mode of the component, wherein the component power control circuitry comprises interrupt generation circuitry to issue an interrupt to the system power controller to signal that the power mode lock condition is met, and wherein the interrupt generation circuitry is capable of issuing an interrupt to the system power controller to signal a power mode change request to the system power controller whilst the power mode lock condition is met. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of operating an apparatus for processing data comprising:
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signaling to a component of the apparatus from component power control circuitry of the apparatus to cause the component to operate in a selected power mode of at least two power modes; operating the component of the apparatus in the selected power mode; executing a set of instructions in a system power controller to control operation of the component power control circuitry by setting a power mode lock condition in the component power control circuitry; and when the power mode lock condition is met, preventing the component power control circuitry from changing the selected power mode of the component, issuing an interrupt to the system power controller to signal that the power mode lock condition is met, and further issuing an interrupt to the system power controller to signal a power mode change request whilst the power mode lock condition is met.
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Specification