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NL7704655A - Tion storage protection control system - combines protect key stack with access key register and active access key - Google Patents

Tion storage protection control system - combines protect key stack with access key register and active access key

Info

Publication number
NL7704655A
NL7704655A NL7704655A NL7704655A NL7704655A NL 7704655 A NL7704655 A NL 7704655A NL 7704655 A NL7704655 A NL 7704655A NL 7704655 A NL7704655 A NL 7704655A NL 7704655 A NL7704655 A NL 7704655A
Authority
NL
Netherlands
Prior art keywords
key
access key
stack
access
addresses
Prior art date
Application number
NL7704655A
Other languages
Dutch (nl)
Original Assignee
Ibm
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
Priority claimed from US05/681,984 external-priority patent/US4037214A/en
Priority claimed from US05/682,224 external-priority patent/US4038645A/en
Priority claimed from US05/682,222 external-priority patent/US4037215A/en
Application filed by Ibm filed Critical Ibm
Publication of NL7704655A publication Critical patent/NL7704655A/en

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
    • G06F12/02—Addressing or allocation; Relocation
    • G06F12/08—Addressing or allocation; Relocation in hierarchically structured memory systems, e.g. virtual memory systems
    • G06F12/10—Address translation
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Security & Cryptography (AREA)
  • Storage Device Security (AREA)

Abstract

The storage protection control system combines a storage protect key stack with an access key register (AKR) and active access key (AAK) select circuits. Storage key entries in the stack correspond to the physical blocks in the main memory, to provide storage protection for different storage access types within address sub-ranges in the main memory associated with respective access keys. The sub-ranges are blocks of addresses within the full range of addresses of the physical memory. The protect key operation applies to physical addresses, and it obtains system addressing compatibility with an address translation operation using the same access keys as address keys with program logical addresses.
NL7704655A 1976-04-30 1977-04-28 Tion storage protection control system - combines protect key stack with access key register and active access key NL7704655A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US05/681,984 US4037214A (en) 1976-04-30 1976-04-30 Key register controlled accessing system
US05/682,224 US4038645A (en) 1976-04-30 1976-04-30 Non-translatable storage protection control system
US05/682,222 US4037215A (en) 1976-04-30 1976-04-30 Key controlled address relocation translation system

Publications (1)

Publication Number Publication Date
NL7704655A true NL7704655A (en) 1977-11-01

Family

ID=27418393

Family Applications (1)

Application Number Title Priority Date Filing Date
NL7704655A NL7704655A (en) 1976-04-30 1977-04-28 Tion storage protection control system - combines protect key stack with access key register and active access key

Country Status (1)

Country Link
NL (1) NL7704655A (en)

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Legal Events

Date Code Title Description
BA A request for search or an international-type search has been filed
BB A search report has been drawn up
BC A request for examination has been filed
A85 Still pending on 85-01-01
BV The patent application has lapsed