Intel Corporation

Ruchir Shah

Kumar Ganapathy

Saurin Shah

Ruban Kanapathippillai

Earle F Philhower, Iii

George Moussa

A distributed direct memory access (DMA) method, apparatus, and system is provided within a system on chip (SOC). DMA controller units are distributed to various functional modules desiring direct memory access. The functional modules interface to a systems bus over which the direct memory access occurs. A global buffer memory, to which the direct memory access is desired, is coupled to the system bus. Bus arbitrators are utilized to arbitrate which functional modules have access to the system bus to perform the direct memory access. Once a functional module is selected by the bus arbitrator to have access to the system bus, it can establish a DMA routine with the global buffer memory.

Method and apparatus for distributed direct memory access for systems on chip

Distributed direct memory access for systems on chip

A direct memory access (DMA) descriptor table to control DMA of information in a memory is disclosed. The DMA descriptor table includes one or more DMA descriptor lists stored in the memory. Each DMA descriptor lists may include one or more pointers and information regarding the type of data being directly memory accessed. The pointers may point to a starting address in the memory from which to directly memory access data, prior state information, or program code from and to the memory.

Tables with direct memory access descriptor lists for distributed direct memory access

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Mountain View, CA, United States of America

Ruchir Shah