Memory arbitration system and method having an arbitration packet protocol
First Claim
1. A method of responding to a read request in a system memory having a responding hub and at least one interposing hub through which a read response is transmitted on a data path of the interposing hub, the method comprising:
- retrieving read data from a memory device coupled to the responding hub and preparing a read response including the read data;
generating an arbitration packet including data indicative of a data path configuration for the read response, the arbitration packet having a plurality of 8-bit bytes including at least one byte including data used by the interposing hub to distinguish the arbitration packet from a read response;
providing the arbitration packet and the read response to the interposing hub, the arbitration packet provided prior to the read response; and
enabling a data path for the read response in the interposing hub in accordance with the data of the arbitration packet.
7 Assignments
0 Petitions
Accused Products
Abstract
A memory hub and method for transmitting a read response on a data path of a memory hub interposed between a transmitting memory hub and a receiving memory hub. An arbitration packet including data indicative of a data path configuration for an associated read response is received at the memory hub. The arbitration packet is decoded, and the data path is configured in accordance with the data of the arbitration packet. The associated read response is received at the memory hub and the associated read response is coupled to the configured data path for transmitting the same to the receiving memory hub.
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Citations
8 Claims
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1. A method of responding to a read request in a system memory having a responding hub and at least one interposing hub through which a read response is transmitted on a data path of the interposing hub, the method comprising:
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retrieving read data from a memory device coupled to the responding hub and preparing a read response including the read data; generating an arbitration packet including data indicative of a data path configuration for the read response, the arbitration packet having a plurality of 8-bit bytes including at least one byte including data used by the interposing hub to distinguish the arbitration packet from a read response; providing the arbitration packet and the read response to the interposing hub, the arbitration packet provided prior to the read response; and enabling a data path for the read response in the interposing hub in accordance with the data of the arbitration packet. - View Dependent Claims (2, 3, 4, 5)
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6. A method of transmitting a read response on a data path of a hub interposed between a transmitting hub and a receiving hub, the method comprising:
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receiving a query from the transmitting hub whether the hub is busy and responding to the query by indicating to the transmitting hub that the hub is not busy; receiving at the hub an arbitration packet including data indicative of a data path configuration for an associated read response prior to receiving the associated read response; and configuring the data path in accordance with the data of the arbitration packet. - View Dependent Claims (7, 8)
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Specification