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Multi-level memory access in an optical transceiver

  • US 20050196165A1
  • Filed: 03/07/2005
  • Published: 09/08/2005
  • Est. Priority Date: 03/05/2004
  • Status: Active Grant
First Claim
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1. In an optical transceiver communicatively couplable to an external host processor, the optical transceiver including a processing entity, a system memory, and a memory access table having a plurality of access entries, each access entry for defining an access condition for a corresponding memory segment, a method of granting access to the system memory on a per-segment basis, the method comprising:

  • an act of the receiving a request from the external host processor for access privileges to at least one segment of system memory;

    in response to receiving the request for access privileges;

    an act of the processing entity reading a first access entry defining a first access condition for accessing a first segment of system memory;

    an act of the processing entity determining external host processor access privileges for the first segment of system memory based on the first access condition read;

    an act of the processing entity reading a second access entry defining a second access condition for accessing a second segment of system memory, wherein the second access condition may be met by satisfying the first access condition or another access condition; and

    an act of the processing entity determining external host processor access privileges for the second segment of system memory based on the second access condition read.

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