US 7,610,581 B2Granted

Data processing system

AssigneeHitachi, Ltd.

InventorsYoshihiro Toyohara, Tetsuhiro Goto, Megumu Hasegawa, Takeshi Shigeno

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Abstract

In a data processing system which runs a plurality of operating systems, a channel device can be shared by the plurality of operating systems. In addition, a channel device which supports port multiplexing can also be shared by a plurality of operating systems. The channel device includes a plurality of IDs each indicating that the channel device is a medium for performing input/output processing, and an input/output processing controller for assigning one operating system to each of the IDs, and controlling a data transfer independently for each ID to control a plurality of data transfers. Further, in a channel device which has a plurality of ports, an input/output processing controller is provided for assigning an operating system to each of the ports, and transferring data independently for each port to control the plurality of ports.

Claims11

Dependent claims

A data processing system capable of running a plurality of operating systems under the control of a control program executed on a central processing unit, said data processing system comprising a channel device for transmitting and receiving data to and from an I/O device, wherein:

said channel device includes a plurality of channel device identifiers each indicative of a medium for transmitting and receiving data to and from the I/O device,
said control program includes means for assigning one operating system on said system to each of the plurality of channel device identifiers, and
said channel device further includes an input/output processing control means for independently controlling transmission and reception of data for input/output processing initiated from a certain operating system for each of the channel device identifiers to which the operating systems are assigned, said input/output processing control means controlling the transmission and reception of data for the plurality of operating systems, and wherein:
said channel device includes a plurality of control registers respectively storing one of the channel device identifiers for the respective operating systems on said system to control said channel device,
said control program includes means for assigning one operating system to each of said control registers, and
each of said control registers is controlled by the operating system assigned thereto, and each of the operating systems is arranged to communicate with the I/O device according to a channel device identifier having been stored in the control register assigned to corresponding one of the operating systems.

3 more elements

A data processing system comprising a processor, a main storage, a channel device, and a plurality of operating systems running on said data processing system under the control of a control program, wherein:

said channel device comprises:
a plurality of buffers for transferring data between said main storage and an I/O device;
a plurality of control registers for controlling said channel device in correspondence to each of the plurality of operating systems;
and
input/output processing control means for controlling a plurality of data transfers,
each of said plurality of control registers stores a channel device identifier for transmitting and receiving data to and from said input/output device, and
said input/output processing control means controls data transfers for the plurality of operating system in accordance with a correspondence relationship among each of the plurality of operating systems, said channel device identifier, and said buffer, and
said control program includes means for assigning one operating system on said system to each of the plurality of channel device identifiers, and wherein:
said channel device includes said plurality of control registers respectively storing one of the channel device identifiers for the respective operating systems on said system to control said channel device,
said control program includes means for assigning one operating system to each of said control registers, and
each of the operating systems is arranged to communicate with the I/O device according to a channel device identifier having been stored in the control register assigned to corresponding one of the operating systems.

8 more elements

Dependencies are inferred from the claim text.

Facts

Application: 11/025,916Filed 3 Jan 2005
Priority: JP 2004-0025778 Jan 2004
Published: US 2005/0177648 A111 Aug 2005
Granted: 27 Oct 2009
Term ends: Not estimatedThe source records don’t support an estimate.

Classification2 codes

G06F 13/124
Using hardware independent of the central processor, e.g. channel or peripheral processor: where hardware is a sequential transfer control unit,…
G06F
Computing and data processing

Family

US 2005/0177648 A1Pre-grant publication · published 11 Aug 2005
US 7,610,581 B2This patent

From the US filing history. Foreign family members aren’t listed.

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