Method and apparatus for accessing hardware resource
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United States of America Patent
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Dec 27, 2016
Grant Date -
Aug 4, 2016
app pub date -
Mar 3, 2016
filing date -
Sep 4, 2013
priority date (Note) -
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status (Latency Note)
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Abstract
A method and an apparatus for accessing a hardware resource are provided. The method includes configuring permission for one or more privileged instructions that are used for hardware access such that when the privileged instructions are used by a user mode application program, the application program can access a hardware resource without trapping into a kernel, and executing the privileged instructions that are encapsulated in the privileged application programming interface (API) that is called at the code level by the application program , and a privileged instruction for direct access to a hardware resource is set and encapsulated into an API, which is deployed in user space in order to reduce system overheads for accessing the hardware resource and improve processing efficiency.
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