Quick starting external programmer for implantable medical device
First Claim
1. A device, comprising:
- a processor;
a volatile system memory for containing executable operating system and application code;
a nonvolatile image storage medium;
a paging mechanism;
a target state image saving routine for creating an image of a target state which includes those pages in linear address space that are mapped into page frames of physical address space by the paging mechanism in the target state;
an operating system return routine for returning control of the device to the operating system software after execution of the target state image saving routine; and
,a restore routine for transitioning the device from a non-operational state to the target state by restoring the contents of volatile memory and processor registers to the target state in accordance with the target state image contained in the image storage medium and executing the operating system return routine.
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Abstract
A system and method for restoring a microprocessor-based system to a previously booted target state in which an image of memory and the processor registers in the previously booted state is saved and stored in a storage device. A restore routine executing in ROM retrieves the image from the storage device and restores the system memory and processor registers to the target state. An operating system return routine then returns control of the system to the operating system software. In an exemplary implementation, a system in accordance with the invention is incorporated into a microprocessor-based external programmer for a cardiac rhythm management device in order to allow quick starting of the programmer from a powered down condition without going through a time consuming boot process.
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Citations
20 Claims
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1. A device, comprising:
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a processor; a volatile system memory for containing executable operating system and application code; a nonvolatile image storage medium; a paging mechanism; a target state image saving routine for creating an image of a target state which includes those pages in linear address space that are mapped into page frames of physical address space by the paging mechanism in the target state; an operating system return routine for returning control of the device to the operating system software after execution of the target state image saving routine; and
,a restore routine for transitioning the device from a non-operational state to the target state by restoring the contents of volatile memory and processor registers to the target state in accordance with the target state image contained in the image storage medium and executing the operating system return routine. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification