公开(公告)号：AU9180182A

公开(公告)日：1983-08-11

申请号：AU9180182

申请日：1982-12-22

Applicant: IBM

Inventor： BURK JOHN LESLIE ,  BUTWELL JUSTIN RALPH ,  CLARK CARL EDWARD ,  RODELL JOHN TED ,  STUCKI DAVID EMMETT

IPC: G06F12/14 ,  G06F13/06

Abstract: This invention relates to the fetch protection of a critical area in the main storage of a data processing system. The critical area is a part of a main storage block protectable by a single storage protect key having a fetch protection field. To enable different fetch protections within a special storage block, fetch protect override controls are provided which partly override the normal operation of the storage protect key for a page located at a predetermined address. While fetch protection is set on for the page's storage block, the fetch protect override controls disable fetch protection for a portion of the page's addresses, e.g. addresses 0-2047. Override enablement is controlled by a fetch protect override control bit in a control register, e.g. bit 6 of control register 0.

公开(公告)号：DE3279452D1

公开(公告)日：1989-03-23

申请号：DE3279452

申请日：1982-10-29

Applicant: IBM

Inventor： BURK JOHN LESLIE ,  BUTWELL JUSTIN RALPH ,  CLARK CARL EDWARD ,  RODELL JOHN TED ,  STUCKI DAVID EMMETT

IPC: G06F12/14

Abstract: This invention relates to the fetch protection of a critical area in the main storage of a data processing system. The critical area is a part of a main storage block protectable by a single storage protect key having a fetch protection field. To enable different fetch protections within a special storage block, fetch protect override controls are provided which partly override the normal operation of the storage protect key for a page located at a predetermined address. While fetch protection is set on for the page's storage block, the fetch protect override controls disable fetch protection for a portion of the page's addresses, e.g. addresses 0-2047. Override enablement is controlled by a fetch protect override control bit in a control register, e.g. bit 6 of control register 0.

公开(公告)号：DE69312589T2

公开(公告)日：1998-02-19

申请号：DE69312589

申请日：1993-05-07

Applicant: IBM

Inventor： BRICE FRANK WILLIAM ,  ELLIOTT JOSEPH CHARLES ,  FREDERICKS KENNETH JAMES ,  GALBRAITH ROBERT EDWARD ,  HALMA MARTEN JAN ,  HOUGH ROGER ELDRED ,  JOHN SUZANNE MARIE ,  MALINOWSKI PAUL ANTHONY ,  MERITT ALLAN SAMUEL ,  OAKES KENNETH JAMES ,  RATHJEN JOHN CORD ,  SACHS MARTIN WILLIAM ,  STUCKI DAVID EMMETT ,  WYMAN LESLIE WOOD

IPC: G06F9/455 ,  G06F9/46 ,  G06F13/10

Abstract: Provides a method for increasing the connectivity of I/O resources to a multiplicity of operating systems (OSs) running in different resource partitions of a computer electronic complex (CEC) to obtain sharing of the I/O resources among the OSs of the CEC, including channels, subchannels (devices), and control units (CUs). The invention provides image identifiers (IIDs) for assigning resources to the different OSs. Each shared I/O resource has a sharing set of control blocks (CBs) in which a respective CB is assigned to (and located by) a respective IID of one of the OSs. Each of the CBs in a sharing set provides a different image of the same I/O resource. The different CB images are independently set to different states by I/O operations for the different OSs, so that the OSs can independently share the same I/O resource.

公开(公告)号：DE69312589D1

公开(公告)日：1997-09-04

申请号：DE69312589

申请日：1993-05-07

Applicant: IBM

Inventor： BRICE FRANK WILLIAM ,  ELLIOTT JOSEPH CHARLES ,  FREDERICKS KENNETH JAMES ,  GALBRAITH ROBERT EDWARD ,  HALMA MARTEN JAN ,  HOUGH ROGER ELDRED ,  JOHN SUZANNE MARIE ,  MALINOWSKI PAUL ANTHONY ,  MERITT ALLAN SAMUEL ,  OAKES KENNETH JAMES ,  RATHJEN JOHN CORD ,  SACHS MARTIN WILLIAM ,  STUCKI DAVID EMMETT ,  WYMAN LESLIE WOOD

IPC: G06F9/455 ,  G06F9/46 ,  G06F13/10

Abstract: Provides a method for increasing the connectivity of I/O resources to a multiplicity of operating systems (OSs) running in different resource partitions of a computer electronic complex (CEC) to obtain sharing of the I/O resources among the OSs of the CEC, including channels, subchannels (devices), and control units (CUs). The invention provides image identifiers (IIDs) for assigning resources to the different OSs. Each shared I/O resource has a sharing set of control blocks (CBs) in which a respective CB is assigned to (and located by) a respective IID of one of the OSs. Each of the CBs in a sharing set provides a different image of the same I/O resource. The different CB images are independently set to different states by I/O operations for the different OSs, so that the OSs can independently share the same I/O resource.

公开(公告)号：AU552747B2

公开(公告)日：1986-06-19

申请号：AU9180182

申请日：1982-12-22

Applicant: IBM

Inventor： BURK JOHN LESLIE ,  BUTWELL JUSTIN RALPH ,  CLARK CARL EDWARD ,  RODELL JOHN TED ,  STUCKI DAVID EMMETT

IPC: G06F12/14 ,  G06F13/06

Abstract: This invention relates to the fetch protection of a critical area in the main storage of a data processing system. The critical area is a part of a main storage block protectable by a single storage protect key having a fetch protection field. To enable different fetch protections within a special storage block, fetch protect override controls are provided which partly override the normal operation of the storage protect key for a page located at a predetermined address. While fetch protection is set on for the page's storage block, the fetch protect override controls disable fetch protection for a portion of the page's addresses, e.g. addresses 0-2047. Override enablement is controlled by a fetch protect override control bit in a control register, e.g. bit 6 of control register 0.