Network processor having cyclic redundancy check implemented in hardware
First Claim
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1. A network processor comprising:
- a bus in communication with a plurality of hardwired Cyclic Redundancy Check (CRC) circuits, each CRC circuit implementing a CRC polynomial for generating a CRC result; and
a switch for directing input data to at least one of the CRC circuits based on a CRC instruction; and
an error detection circuit electrically coupled to the bus for determining whether the input data includes an error based on the CRC result.
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Abstract
A network processor [200] performs Cyclic Redundancy Check (CRC) operations using specialized hardware circuits [308-308]. The network processor [200] includes a plurality of hardwired CRC polynomials that are used to implement the CRC operations. A CRC instruction selects which polynomial to use when performing the CRC operation.
15 Citations
9 Claims
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1. A network processor comprising:
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a bus in communication with a plurality of hardwired Cyclic Redundancy Check (CRC) circuits, each CRC circuit implementing a CRC polynomial for generating a CRC result; and
a switch for directing input data to at least one of the CRC circuits based on a CRC instruction; and
an error detection circuit electrically coupled to the bus for determining whether the input data includes an error based on the CRC result. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A network processor comprising:
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a bus in communication with a plurality of preexisting Cyclic Redundancy Check (CRC) circuits, a switch for directing input data to at least one of the CRC circuits based on a CRC instruction based upon an indication of a polynomial included in a CRC instruction; and
an error detecting circuit electrically connected to the bus for determining whether the input data includes an error based on a CRC result output by the at least one CRC circuit to which the input data was directed. - View Dependent Claims (8, 9)
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Specification
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Current AssigneeTAG Foundation (SeeSaw Foundation)
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Original AssigneeBBN Technologies (Rtx Corporation)
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InventorsMilliken, Walter Clark
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Granted Patent
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Time in Patent OfficeDays
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Field of Search
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US Class Current714/718
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CPC Class CodesH03M 13/09 Error detection only, e.g. ...H03M 13/6513 Support of multiple code ty...H04L 1/0043 Realisations of complexity ...H04L 1/0061 Error detection codesH04L 2001/0094 BusH04L 69/12 Protocol engines
