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    2.
    发明专利
    未知

    公开(公告)号：DE69231611D1

    公开(公告)日：2001-02-01

    申请号：DE69231611

    申请日：1992-10-30

    Applicant: IBM

    Inventor： BAUM RICHARD IRWIN ,  PLAMBECK KENNETH ERNEST ,  SCALZI CASPER ANTHONY ,  SCHMALZ RICHARD JOHN ,  SINHA BHASKAR

    IPC: G06F12/10 ,  G06F12/02

    Abstract: A method and means of translating a large logical address as a large virtual address (LVA) when dynamic address translator (DAT) is on and for using the large logical address as a large real address (LRA) when DAT (33) is off. This LVA or LRA is used for locating data and instructions in a computer memory. Each LVA is separated into three concatenated parts: a highest-order part (ADEN) for indexing into an access directory (AD) to locate an entry (ADE) for locating one access list (AL); an intermediate part (ALEN) for indexing into a selected AL to access an entry (ALE) that enables location of an associated conventional address translation table which represents a conventional size virtual address space; and a low-order DAT VA part having the same size as the conventional type of virtual address. The low-order DAT VA part is translated by the associated translation table (48). This address translation of the low-order (DAT VA) part provides a real address that represents the translation of the LVA. The LVAs map into a large virtual address space (LVAS) represented by the sequence of valid ALEs in the set of ALs respectively represented by the sequence of valid ADEs in the AD. The sequence of ADEs in the AD respectively locate the ALs containing the ALEs which represent the LVAS. Thus, the range of LVAs (starting from zero) in the LVAS maps to the respective ALEs in the set of ALs. Each AL may contain a respective offset of ALEs that are not part of the LVAS.

    METHOD OF SECURING OF ACCES PROTECTION FOR DATA BLOCKS AND THE DEVICE FOR REALIZATION OF THIS METHOD
    4.
    发明专利
    METHOD OF SECURING OF ACCES PROTECTION FOR DATA BLOCKS AND THE DEVICE FOR REALIZATION OF THIS METHOD 未知

    公开(公告)号：SK136193A3

    公开(公告)日：1994-08-10

    申请号：SK136193

    申请日：1992-04-29

    Applicant: IBM

    Inventor： CLARK CARL E ,  SCALZI CASPER A ,  MALL MICHAEL G ,  SINHA BHASKAR

    IPC: G06F12/14 ,  G06F21/24

    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.

    STORAGE PROTECTION UTILIZING PUBLIC KEY CONTROLL
    5.
    发明专利
    STORAGE PROTECTION UTILIZING PUBLIC KEY CONTROLL 未知

    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

    IPC: G06F12/14 ,  G06F21/24

    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.

    ARRANGEMENT FOR PROTECTING DATA IN A COMPUTER SYSTEM MEMORY MODULE AGAINST UNAUTHORISED ACCESS
    8.
    发明专利
    ARRANGEMENT FOR PROTECTING DATA IN A COMPUTER SYSTEM MEMORY MODULE AGAINST UNAUTHORISED ACCESS 未知

    公开(公告)号：PL170547B1

    公开(公告)日：1996-12-31

    申请号：PL30081092

    申请日：1992-04-29

    Applicant: IBM

    Inventor： CLARK CARL E ,  MALL MICHAEL G ,  SCALZI CASPER A ,  SINHA BHASKAR

    IPC: G06F12/14 ,  G06F21/24

    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.

    STORAGE PROTECTION UTILIZING PUBLIC KEY CONTROL
    9.
    发明专利
    STORAGE PROTECTION UTILIZING PUBLIC KEY CONTROL 未知

    公开(公告)号：CA2064640C

    公开(公告)日：1995-12-12

    申请号：CA2064640

    申请日：1992-04-01

    Applicant: IBM

    Inventor： CLARK CARL E ,  MALL MICHAEL G ,  SCALZI CASPER A ,  SINHA BHASKAR

    IPC: G06F12/14 ,  G06F21/24 ,  G06F13/16

    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 a 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 intermediate 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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