Firmware interface with backup non-volatile memory storage
First Claim
1. A system to provide durable storage for a firmware interface, said system comprising:
- a processor to host said firmware interface, said firmware interface to control access to system variables in a protected region of a volatile memory;
a power management circuit to provide power to said processor and further to provide a power loss indicator to said firmware interface;
a reserve energy storage module to provide power to said processor in response to said power loss indicator; and
said firmware interface is further to copy said system variables from said volatile memory to a non-volatile memory in response to said power loss indicator.
1 Assignment
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Accused Products
Abstract
Generally, this disclosure provides systems, devices, methods and computer readable media for a Unified Extensible Firmware Interface (UEFI) with durable storage to provide memory write persistence, for example, in the event of power loss. The system may include a processor to host the firmware interface which may be configured to control access to system variables in a protected region of a volatile memory. The system may also include a power management circuit to provide power to the processor and further to provide a power loss indicator to the firmware interface. The system may also include a reserve energy storage module to provide power to the processor in response to the power loss indicator. The firmware interface is further configured to copy the system variables from the volatile memory to a non-volatile memory in response to the power loss indicator.
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Citations
26 Claims
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1. A system to provide durable storage for a firmware interface, said system comprising:
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a processor to host said firmware interface, said firmware interface to control access to system variables in a protected region of a volatile memory; a power management circuit to provide power to said processor and further to provide a power loss indicator to said firmware interface; a reserve energy storage module to provide power to said processor in response to said power loss indicator; and said firmware interface is further to copy said system variables from said volatile memory to a non-volatile memory in response to said power loss indicator. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method for providing durable storage by a firmware interface, said method comprising:
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controlling, by said firmware interface hosted by a processor, access to system variables in a protected region of a volatile memory; providing, by a power management circuit, a power loss indicator to said firmware interface; switching to power supplied by a reserve energy storage module in response to said power loss indicator; maintaining, by said power management circuit, a power supply from said reserve energy storage module to said processor hosting said firmware interface; and copying, by said firmware interface, said system variables from said volatile memory to a non-volatile memory in response to said power loss indicator. - View Dependent Claims (14, 15, 16, 17, 18, 19)
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20. A non-transitory computer-readable storage medium having instructions stored thereon which when executed by a processor result in the following operations for providing durable storage by a firmware interface, said operations comprising:
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controlling, by said firmware interface hosted by the processor, access to system variables in a protected region of a volatile memory; providing, by a power management circuit, a power loss indicator to said firmware interface; switching to power supplied by a reserve energy storage module in response to said power loss indicator; maintaining, by said power management circuit, a power supply from said reserve energy storage module to said processor hosting said firmware interface; and copying, by said firmware interface, said system variables from said volatile memory to a non-volatile memory in response to said power loss indicator. - View Dependent Claims (21, 22, 23, 24, 25, 26)
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Specification