Electrical computers and digital data processing systems: input/ – Input/output data processing – Direct memory accessing
Reexamination Certificate
2011-08-23
2011-08-23
Kindred, Alford W (Department: 2181)
Electrical computers and digital data processing systems: input/
Input/output data processing
Direct memory accessing
C710S039000, C710S036000, C710S107000
Reexamination Certificate
active
08006000
ABSTRACT:
There is provided a technique of accessing a memory of a processor from a peripheral device, thereby the security is ensured while efficiency is being pursued. An address converter14includes an address conversion table for converting an effective address into a physical address. The address conversion table stores the effective address to which an area in a memory of a processor unit10is allocated to each peripheral device30and identification information of an access source to which access permission is given, in association with each other. When the peripheral device30accesses, the address converter14determines to permit access to the effective address under the condition that the device identification information, included in an access request packet, by which the peripheral device30can be uniquely identified, matches the identification information of the access source corresponding to the effective address, in the address conversion table, designated by the access request packet.
REFERENCES:
patent: 5890220 (1999-03-01), Mochida et al.
patent: 6128684 (2000-10-01), Okayama
patent: 6839777 (2005-01-01), Vrancic et al.
patent: 2002/0124148 (2002-09-01), Beukema et al.
patent: 2005/0193085 (2005-09-01), Shimizu
patent: 1 271 327 (2003-01-01), None
patent: 57-189384 (1982-11-01), None
patent: 57-189384 (1982-11-01), None
patent: 62-115554 (1987-05-01), None
patent: 62-115554 (1987-05-01), None
patent: 4-130553 (1992-05-01), None
patent: 4-130553 (1992-05-01), None
patent: 4-348442 (1992-12-01), None
patent: 4-348442 (1992-12-01), None
patent: 2005-242598 (2005-09-01), None
patent: 2005-242598 (2005-09-01), None
International Preliminary Report on Patentability, and English translation thereof, dated Nov. 17, 2008 from the corresponding PCT/JP2007/050265.
Chinese Office Action dated Nov. 13, 2009, from the corresponding Chinese Application.
Translation of the International Search Report dated Apr. 17, 2007, from the corresponding International Application.
Supplementary European Search Report and Annex to the European Search Report, dated Jan. 30, 2009, for corresponding European Patent Application 07 70 6612.
“Address Translation Mechanism”, IBM Technical Disclosure Bulletin, Apr. 1, 1991, pp. 398-399, vol. 33, No. 11, New York, U.S.
Mitsubayashi Hideki
Saito Hideyuki
Takahashi Yuji
Yamazaki Takeshi
Abad Farley
Katten Muchin & Rosenman LLP
Kindred Alford W
Sony Computer Entertainment Inc.
Sony Corporation
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