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Task processor

  • US 8,776,079 B2
  • Filed: 11/20/2012
  • Issued: 07/08/2014
  • Est. Priority Date: 08/16/2007
  • Status: Active Grant
First Claim
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1. A task control circuit comprising:

  • a state register that stores state data representing state of a task; and

    a task switching circuit that controls a state of a task, wherein the task switching circuit, when a system call signal is received via one or more signal lines from an external processor that executes a task, performs a predetermined system call process in accordance with the system call signal and outputs a return value resulting from the system call process, and wherein when a task switching is required due to the system call process, the task switching circuit generates a save signal for instructing to save context information of a running task and sets the state data of the running task from RUN state, indicating that the task is being executed, to another state.

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