Electrical computers and digital data processing systems: input/ – Input/output data processing – Input/output data buffering
Reexamination Certificate
2011-08-02
2011-08-02
Tsai, Henry W (Department: 2184)
Electrical computers and digital data processing systems: input/
Input/output data processing
Input/output data buffering
C709S213000
Reexamination Certificate
active
07991928
ABSTRACT:
An interface unit may comprise a buffer configured to store requests that are to be transmitted on an interconnect and a control unit coupled to the buffer. In one embodiment, the control unit is coupled to receive a retry response from the interconnect during a response phase of a first transaction for a first request stored in the buffer. The control unit is configured to record an identifier supplied on the interconnect with the retry response that identifies a second transaction that is in progress on the interconnect. The control unit is configured to inhibit reinitiation of the first transaction at least until detecting a second transmission of the identifier. In another embodiment, the control unit is configured to assert a retry response during a response phase of a first transaction responsive to a snoop hit of the first transaction on a first request stored in the buffer for which a second transaction is in progress on the interconnect. The control unit is further configured to provide an identifier of the second transaction with the retry response.
REFERENCES:
patent: 3984814 (1976-10-01), Bailey et al.
patent: 4845614 (1989-07-01), Hanawa et al.
patent: 5592631 (1997-01-01), Kelly et al.
patent: 5612953 (1997-03-01), Olnowich
patent: 5790813 (1998-08-01), Wittaker
patent: 5822765 (1998-10-01), Boatright et al.
patent: 5884052 (1999-03-01), Chambers et al.
patent: 5889972 (1999-03-01), Allingham
patent: 5890217 (1999-03-01), Kabemoto et al.
patent: 5943483 (1999-08-01), Solomon
patent: 6148359 (2000-11-01), Elkhoury et al.
patent: 6553446 (2003-04-01), Miller
patent: 6557068 (2003-04-01), Riley et al.
patent: 6691191 (2004-02-01), Kobayashi et al.
patent: 6816934 (2004-11-01), Riley et al.
patent: 2002/0124145 (2002-09-01), Arimilli et al.
Gunna Ramesh
Keller James B.
Subramanian Sridhar P.
Apple Inc.
Merkel Lawrence J.
Meyertons Hood Kivlin Kowert & Goetzel P.C.
Nam Hyun
Tsai Henry W
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