METHODS AND APPARATUS FOR CONTROL OF A JOINTLY SHARED MEMORY-MAPPED REGION
First Claim
1. A method for using a jointly shared memory between a first processor and a second processor, comprising:
- opening a pass-through application;
mapping a jointly shared memory space for the pass-through application;
accessing the jointly shared memory space via the pass-through application; and
closing the pass-through application.
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Accused Products
Abstract
Methods and apparatus for using and controlling a jointly shared memory-mapped region between multiple processors in a pass-through manner. Existing data pipe input/output (I/O) techniques for mobile device operation enable high speed data transfers, decoupled independent operation of processors, reduced software complexity, reduced power consumption, etc. However, legacy functions and capabilities may only receive marginal benefits from data pipe I/O operation, and in some cases, may even suffer adverse effects from e.g., processing overhead and/or context switching. The present disclosure is directed to dynamically isolating and reaping back a jointly shared memory space for data transfer in a “pass through” manner which does not require kernel space intervention. More directly, a jointly shared region of host memory is accessible to both the peripheral client and the host client in user space.
26 Citations
20 Claims
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1. A method for using a jointly shared memory between a first processor and a second processor, comprising:
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opening a pass-through application; mapping a jointly shared memory space for the pass-through application; accessing the jointly shared memory space via the pass-through application; and closing the pass-through application. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An apparatus, comprising:
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a host processor coupled to a peripheral processor; and a non-transitory computer readable medium comprising one or more instructions which when executed by the host processor, cause the host processor to; manage one or more data pipe transactions via a kernel space communication stack within a shared memory; map a jointly shared memory space within the shared memory, the jointly shared memory space accessible via a memory-mapped input/output (I/O) in user space; and access the jointly shared memory space via a pass-through application. - View Dependent Claims (11, 12, 13, 14)
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15. An apparatus, comprising:
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a peripheral processor coupled to a host processor; and a non-transitory computer readable medium comprising one or more instructions which when executed by the peripheral processor, cause the peripheral processor to; receive a memory map message identifying a jointly shared memory space within a shared memory; access the jointly shared memory space via a pass-through application; and transmit a non-coordinated control message to signal an event associated with the jointly shared memory space. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification