System and method for managing memory using multi-state...

Details System and method for managing memory using multi-state... System and method for managing memory using multi-state...

2008-12-09

2011-11-01

Sorrell, Eron J (Department: 2182)

Electrical computers and digital data processing systems: input/

Input/output data processing

Direct memory accessing

C710S022000, C710S023000, C711S117000, C711S118000, C711S124000, C713S375000

Reexamination Certificate

active

08051223

ABSTRACT:
In an embodiment, buffer constructs may be generated to be associated with any one of multiple mutually exclusive states, including an open state and a closed state. When the buffer construct is in the closed state, the region of memory represented by the buffer construct is made accessible to one or more direct memory access (DMA) operations. Upon completion of the one or more DMA operations, the buffer construct transitions from the closed state to the open state. The region of memory represented by the buffer construct is made accessible for use with one or more cache operations when the buffer construct is in the open state, so that the one or more cache operations are not in conflict with the one or more DMA operations.

REFERENCES:
patent: 5517636 (1996-05-01), DeHart et al.
patent: 7167934 (2007-01-01), Dunn et al.
patent: 2007/0073924 (2007-03-01), Kuroki et al.
patent: 2008/0104328 (2008-05-01), Yoshikawa et al.

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