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Communicating transaction types between agents in a computer system using packet headers including format and type fields

  • US 7,581,026 B2
  • Filed: 12/28/2001
  • Issued: 08/25/2009
  • Est. Priority Date: 12/28/2001
  • Status: Active Grant
First Claim
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1. An apparatus comprising:

  • a general input/output communication port to implement a communication stack including a physical layer, a data link layer and a transaction layer, the transaction layer to assemble a packet header for a transaction packet, the packet header to include;

    a format field to indicate whether the transaction packet includes a data payload and to specify a size of the packet header; and

    a type field to specify a transaction type, the transaction type to be selected from a group consisting of;

    a memory request, an input/output request, a configuration request and a message request,wherein the format field and the type field together indicate a transaction layer packet format associated with a packet type.

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