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Memory access protection apparatus and methods for memory mapped access between independently operable processors

  • US 10,198,364 B2
  • Filed: 09/20/2016
  • Issued: 02/05/2019
  • Est. Priority Date: 03/31/2016
  • Status: Active Grant
First Claim
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1. A method for registering access violations of host memory at a peripheral processor, comprising:

  • receiving one or more window register values from a host processor, the one or more window register values defining an extent of accessible address space within the host memory that is accessible by the peripheral processor;

    responsive to an attempt to access an extent of address space outside of the extent of accessible address space by the peripheral processor, generating an error message by the peripheral processor;

    storing the error message generated by the peripheral processor within a violation register that is accessible by the host processor; and

    preventing access of the host memory by the peripheral processor until the host processor has cleared the error message.

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