DE3587694D1 - Speicherzugriffssteuergerät zur Realisierung von geschützten Gebieten in einem Speicher, und mit solchem Speicherzugriffssteuergerät ausgerüsteter Speicher. - Google Patents

Speicherzugriffssteuergerät zur Realisierung von geschützten Gebieten in einem Speicher, und mit solchem Speicherzugriffssteuergerät ausgerüsteter Speicher.

Info

Publication number
DE3587694D1
DE3587694D1 DE85201290T DE3587694T DE3587694D1 DE 3587694 D1 DE3587694 D1 DE 3587694D1 DE 85201290 T DE85201290 T DE 85201290T DE 3587694 T DE3587694 T DE 3587694T DE 3587694 D1 DE3587694 D1 DE 3587694D1
Authority
DE
Germany
Prior art keywords
memory
control device
access control
memory access
protected areas
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
DE85201290T
Other languages
English (en)
Other versions
DE3587694T2 (de
Inventor
Martin Freeman
Cecil Hertz Kaplinsky
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Application granted granted Critical
Publication of DE3587694D1 publication Critical patent/DE3587694D1/de
Publication of DE3587694T2 publication Critical patent/DE3587694T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F12/00—Accessing, addressing or allocating within memory systems or architectures
    • G06F12/14—Protection against unauthorised use of memory or access to memory
    • G06F12/1458—Protection against unauthorised use of memory or access to memory by checking the subject access rights
    • G06F12/1491—Protection against unauthorised use of memory or access to memory by checking the subject access rights in a hierarchical protection system, e.g. privilege levels, memory rings

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Storage Device Security (AREA)
  • Memory System (AREA)
  • Memory System Of A Hierarchy Structure (AREA)
DE3587694T 1984-08-17 1985-08-09 Speicherzugriffssteuergerät zur Realisierung von geschützten Gebieten in einem Speicher, und mit solchem Speicherzugriffssteuergerät ausgerüsteter Speicher. Expired - Fee Related DE3587694T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/641,793 US4677546A (en) 1984-08-17 1984-08-17 Guarded regions for controlling memory access

Publications (2)

Publication Number Publication Date
DE3587694D1 true DE3587694D1 (de) 1994-02-03
DE3587694T2 DE3587694T2 (de) 1994-06-23

Family

ID=24573875

Family Applications (1)

Application Number Title Priority Date Filing Date
DE3587694T Expired - Fee Related DE3587694T2 (de) 1984-08-17 1985-08-09 Speicherzugriffssteuergerät zur Realisierung von geschützten Gebieten in einem Speicher, und mit solchem Speicherzugriffssteuergerät ausgerüsteter Speicher.

Country Status (4)

Country Link
US (1) US4677546A (de)
EP (1) EP0171859B1 (de)
JP (1) JPH0642212B2 (de)
DE (1) DE3587694T2 (de)

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Also Published As

Publication number Publication date
DE3587694T2 (de) 1994-06-23
JPS6184756A (ja) 1986-04-30
EP0171859A2 (de) 1986-02-19
JPH0642212B2 (ja) 1994-06-01
US4677546A (en) 1987-06-30
EP0171859B1 (de) 1993-12-22
EP0171859A3 (en) 1989-04-26

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8327 Change in the person/name/address of the patent owner

Owner name: PHILIPS ELECTRONICS N.V., EINDHOVEN, NL

8339 Ceased/non-payment of the annual fee