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.

公开(公告)号：BR8900568A

公开(公告)日：1989-10-10

申请号：BR8900568

申请日：1989-02-09

Applicant: IBM

Inventor： BAUM RICHARD IRWIN ,  BORDEN TERRY LEE ,  BUTWELL JUSTIN RALPH ,  CLARK CARL EDWARD ,  GANEK ALAN GEORGE ,  LUM JAMES ,  MALL MICHAEL GERARD ,  PAGE DAVID RICHARD ,  PLAMBECK KENNETH ERNEST ,  SCALZI CASPER ANTHONY ,  SCHMALZ RICHARD JOHN

IPC: G06F12/08 ,  G06F9/46 ,  G06F12/10 ,  G06F12/14 ,  G06F21/24 ,  G06F9/00

Abstract: A program authorization mechanism for authorizing access to an address space in the main memory of a computer system by a program being run under a multiple address space facility. An access-list entry is associated with each address space, each access-list entry being designated by an access-list-entry token contained in an access register. Each access-list entry includes a private indicator which indicates if the associated address space can be accessed by all programs from this access-list entry or if the associatd address space can only be accessed by an authorized program. For a program to be authorized, an extended authorization index in a control register must match an access-list extended authorization index in the access-list entry, or the extended authorization index value must be authorized in an authority table associated with the address space. An instruction for testing a given extended authorization index for a given access-list-entry is also disclosed.

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：DE3854616T2

公开(公告)日：1996-06-13

申请号：DE3854616

申请日：1988-12-12

Applicant: IBM

Inventor： BAUM RICHARD IRWIN ,  BORDEN TERRY LEE ,  BUTWELL JUSTIN RALPH ,  CLARK CARL EDWARD ,  GANEK ALAN GEORGE ,  LUM JAMES ,  MALL MICHAEL GERARD ,  PAGE DAVID RICHARD ,  PLAMBECK KENNETH ERNST ,  SCALZI CASPER ANTHONY ,  SCHMALZ RICHARD JOHN

IPC: G06F12/08 ,  G06F9/46 ,  G06F12/10 ,  G06F12/14 ,  G06F21/24 ,  G06F12/02

Abstract: A program authorization mechanism for authorizing access to an address space in the main memory of a computer system by a program being run under a multiple address space facility. An access-list entry is associated with each address space, each access-list entry being designated by an access-list-entry token contained in an access register. Each access-list entry includes a private indicator which indicates if the associated address space can be accessed by all programs from this access-list entry or if the associatd address space can only be accessed by an authorized program. For a program to be authorized, an extended authorization index in a control register must match an access-list extended authorization index in the access-list entry, or the extended authorization index value must be authorized in an authority table associated with the address space. An instruction for testing a given extended authorization index for a given access-list-entry is also disclosed.

公开(公告)号：DE3854616D1

公开(公告)日：1995-11-30

申请号：DE3854616

申请日：1988-12-12

Applicant: IBM

Inventor： BAUM RICHARD IRWIN ,  BORDEN TERRY LEE ,  BUTWELL JUSTIN RALPH ,  CLARK CARL EDWARD ,  GANEK ALAN GEORGE ,  LUM JAMES ,  MALL MICHAEL GERARD ,  PAGE DAVID RICHARD ,  PLAMBECK KENNETH ERNST ,  SCALZI CASPER ANTHONY ,  SCHMALZ RICHARD JOHN

IPC: G06F12/08 ,  G06F9/46 ,  G06F12/10 ,  G06F12/14 ,  G06F21/24 ,  G06F12/02

Abstract: A program authorization mechanism for authorizing access to an address space in the main memory of a computer system by a program being run under a multiple address space facility. An access-list entry is associated with each address space, each access-list entry being designated by an access-list-entry token contained in an access register. Each access-list entry includes a private indicator which indicates if the associated address space can be accessed by all programs from this access-list entry or if the associatd address space can only be accessed by an authorized program. For a program to be authorized, an extended authorization index in a control register must match an access-list extended authorization index in the access-list entry, or the extended authorization index value must be authorized in an authority table associated with the address space. An instruction for testing a given extended authorization index for a given access-list-entry is also disclosed.

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：DE3176834D1

公开(公告)日：1988-09-08

申请号：DE3176834

申请日：1981-02-16

Applicant: IBM

Inventor： BUTWELL JUSTIN RALPH ,  SCALZI CASPER ANTHONY ,  SCHMALZ RICHARD JOHN

IPC: G06F9/34 ,  G06F12/06 ,  G06F12/10 ,  G06F12/14

Abstract: The specification discloses an address control means in a data processing system which associates access registers (AR's 46) with the general purpose registers (GPR's 17) in a data processor. The AR's are each loaded with a unique STD (segment table descriptor). The STD comprises a segment table address in main storage and a segment table length field. There are 15 AR's associated respectively with 15 GPR's in a processor to define a subset of up to 15 data address spaces. The STD in an AR is selected for address translation when the associated GPR is selected as a storage operand base register, such as being the GPR selected by the B-field in an IBM System/370 instruction. The arrangement allows each AR to specify that it does not use the STD in its associated AR to define its data address space, but instead uses the STD in the program address space AR. However, the STD content of an AR is not selected for an address translation if the associated GPR is selected for a purpose other than as a storage operand base register, such as if a GPR is selected as an index (X) register or as a data source or sink register (R) for an instruction. A sixteenth AR may be provided to define and control the executing program address space, which may also contain data. The arrangement obtains authority and other control for access to and use of the content in each address space by also associating an AR Control Vector (ARCV) register with each AR.