公开(公告)号：DE69229203D1

公开(公告)日：1999-06-24

申请号：DE69229203

申请日：1992-08-27

Applicant: IBM

Inventor： BAUM RICHARD IRWIN ,  CARLSON BRENT ALLEN ,  KIM MOON JU ,  MALL MICHAEL GERARD ,  SCALZI CASPER ANTHONY ,  SINHA BHASKAR

IPC: G06F9/32 ,  G06F9/355 ,  G06F12/02 ,  G06F12/06

公开(公告)号：DE68924720D1

公开(公告)日：1995-12-14

申请号：DE68924720

申请日：1989-02-02

Applicant: IBM

Inventor： CLARK CARL EDWARD ,  GANEK ALAN GEORGE ,  MALL MICHAEL GERARD ,  PAGE DAVID RICHARD

IPC: G06F9/46 ,  G06F12/02 ,  G06F12/10 ,  G06F12/14 ,  G06F12/08 ,  G06F12/06

Abstract: A method and apparatus is provided to translate the contents of access registers into information for use in performing addressing functions for multiple virtual address spaces. The access registers represent the full addressing capability of the system but do not directly contain the addressing information. The system has a plurality of general purpose registers (20), a plurality of access registers (22) associated with the general registers, an access list (24,25) having access list entries which is addressed by the contents of the access register, memory storage (30) for holding address space number second table entries (ASTE) (98), where the contents of the access list entry locate the ASTE and where the ASTE contains the addressing information needed to locate a virtual address when combined with the contents of a general register. Access register translation (ART) consists of the process of determining addressing information by using the access list entry and the ASTE. The system has available to it at any one time a selection of one of two domains each represented by an access list. One domain is related to the dispatchable unit task to be performed and the other is related to the address space in which a particular program operates. The ART process selects the domain which the access register is using.

公开(公告)号：MX9205088A

公开(公告)日：1993-03-01

申请号：MX9205088

申请日：1992-09-04

Applicant: IBM

Inventor： BAUM RICHARD IRWIN ,  CARLSON BRENT ALLEN ,  KIM MOON JU ,  MALL MICHAEL GERARD ,  SCALZI CASPER ANTHONY ,  SINHA BHASKAR NMN

IPC: G06F9/32 ,  G06F9/355 ,  G06F12/02 ,  G06F12/06 ,  G11C5/00

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.