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公开(公告)号：DE68924720T2
公开(公告)日：1996-06-13
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
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.
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公开(公告)号：DE68923386T2
公开(公告)日：1996-03-28
申请号：DE68923386
申请日：1989-01-17
Applicant: IBM
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公开(公告)号：HU9303459D0
公开(公告)日：1994-04-28
申请号：HU9303459
申请日：1992-04-29
Applicant: IBM
Inventor： CLARK CARL EDWARD , MALL MICHAEL GERARD , SCALZI CASPER ANTONY , SINHA BHASKAR
Abstract: Provides three access levels of storage key protection, comprising a supervisory level (key 0), an intermediate level of non-public and non-supervisory keys (keys 1-8, 10-15), and an unique public level (key 9). The program routines operating with a supervisory-level access key can access both the public level and the intermediate level of storage blocks. Although a program routine operating with an access key in the intermediary access level cannot access any supervisory level storage block, it can access any block assigned a public level storage key, as well as any storage block assigned the respective intermediate level key. One or more third-level public storage keys (PSKs) may be provided. A program access key using one of the PSK values can only access blocks having the same PSK value, and it cannot access blocks having any other key value.
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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
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.
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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
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.
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Patent Agency Ranking6.发明专利
公开(公告)号：HUT67635A
公开(公告)日：1995-04-28
申请号：HU9303459
申请日：1992-04-29
Applicant: IBM
Inventor： CLARK CARL EDWARD , MALL MICHAEL GERARD , SCALZI CASPER ANTONY , SINHA BHASKAR
Abstract: Provides three access levels of storage key protection, comprising a supervisory level (key 0), an intermediate level of non-public and non-supervisory keys (keys 1-8, 10-15), and an unique public level (key 9). The program routines operating with a supervisory-level access key can access both the public level and the intermediate level of storage blocks. Although a program routine operating with an access key in the intermediary access level cannot access any supervisory level storage block, it can access any block assigned a public level storage key, as well as any storage block assigned the respective intermediate level key. One or more third-level public storage keys (PSKs) may be provided. A program access key using one of the PSK values can only access blocks having the same PSK value, and it cannot access blocks having any other key value.
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公开(公告)号：DE69229203T2
公开(公告)日：1999-12-09
申请号：DE69229203
申请日：1992-08-27
Applicant: IBM
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公开(公告)号：AT180338T
公开(公告)日：1999-06-15
申请号：AT92114631
申请日：1992-08-27
Applicant: IBM
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公开(公告)号：DE68923386D1
公开(公告)日：1995-08-17
申请号：DE68923386
申请日：1989-01-17
Applicant: IBM
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公开(公告)号：BR8900567A
公开(公告)日：1989-10-10
申请号：BR8900567
申请日：1989-02-09
Applicant: IBM
Inventor： CLARK CARL EDWARD , GANEK ALAN GEORGE , MALL MICHAEL GERARD , PAGE DAVID RICHARD
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.
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