JPS5698766A - Virtual memory control system - Google Patents

Virtual memory control system

Info

Publication number
JPS5698766A
JPS5698766A JP17079979A JP17079979A JPS5698766A JP S5698766 A JPS5698766 A JP S5698766A JP 17079979 A JP17079979 A JP 17079979A JP 17079979 A JP17079979 A JP 17079979A JP S5698766 A JPS5698766 A JP S5698766A
Authority
JP
Japan
Prior art keywords
hardware
software
area
accessed
control system
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.)
Granted
Application number
JP17079979A
Other languages
Japanese (ja)
Other versions
JPS6161144B2 (en
Inventor
Saburo Kaneda
Yukichi Ikuta
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.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP17079979A priority Critical patent/JPS5698766A/en
Publication of JPS5698766A publication Critical patent/JPS5698766A/en
Publication of JPS6161144B2 publication Critical patent/JPS6161144B2/ja
Granted legal-status Critical Current

Links

Abstract

PURPOSE: To provide an address converting function that an address conversion table can not be accessed direct through software, by modifying an equipment having converting function for an existing channel relatively simply.
CONSTITUTION: Virtual storage key table 23, counters 26 and 29, and queues 30 and 31 are located in area 32 made of hardware, and at a request of a special instruction from software, the hardware is accessed. Further, segment table 5 and page table 6 are located in a hardware-using area and direct access to logical addresses through software is disabled. Furthermore, storage key and page bits is accessed through the hardware by special instructions. Consequently, the space that the software is recognized is limited to the virtual storage space including a program area and data area.
COPYRIGHT: (C)1981,JPO&Japio
JP17079979A 1979-12-29 1979-12-29 Virtual memory control system Granted JPS5698766A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17079979A JPS5698766A (en) 1979-12-29 1979-12-29 Virtual memory control system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17079979A JPS5698766A (en) 1979-12-29 1979-12-29 Virtual memory control system

Publications (2)

Publication Number Publication Date
JPS5698766A true JPS5698766A (en) 1981-08-08
JPS6161144B2 JPS6161144B2 (en) 1986-12-24

Family

ID=15911560

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17079979A Granted JPS5698766A (en) 1979-12-29 1979-12-29 Virtual memory control system

Country Status (1)

Country Link
JP (1) JPS5698766A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5724551A (en) * 1996-05-23 1998-03-03 International Business Machines Corporation Method for managing I/O buffers in shared storage by structuring buffer table having entries include storage keys for controlling accesses to the buffers
US5787309A (en) * 1996-05-23 1998-07-28 International Business Machines Corporation Apparatus for protecting storage blocks from being accessed by unwanted I/O programs using I/O program keys and I/O storage keys having M number of bits
US5802397A (en) * 1996-05-23 1998-09-01 International Business Machines Corporation System for storage protection from unintended I/O access using I/O protection key by providing no control by I/O key entries over access by CP entity
US5809546A (en) * 1996-05-23 1998-09-15 International Business Machines Corporation Method for managing I/O buffers in shared storage by structuring buffer table having entries including storage keys for controlling accesses to the buffers
US5900019A (en) * 1996-05-23 1999-05-04 International Business Machines Corporation Apparatus for protecting memory storage blocks from I/O accesses

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5724551A (en) * 1996-05-23 1998-03-03 International Business Machines Corporation Method for managing I/O buffers in shared storage by structuring buffer table having entries include storage keys for controlling accesses to the buffers
US5787309A (en) * 1996-05-23 1998-07-28 International Business Machines Corporation Apparatus for protecting storage blocks from being accessed by unwanted I/O programs using I/O program keys and I/O storage keys having M number of bits
US5802397A (en) * 1996-05-23 1998-09-01 International Business Machines Corporation System for storage protection from unintended I/O access using I/O protection key by providing no control by I/O key entries over access by CP entity
US5809546A (en) * 1996-05-23 1998-09-15 International Business Machines Corporation Method for managing I/O buffers in shared storage by structuring buffer table having entries including storage keys for controlling accesses to the buffers
US5900019A (en) * 1996-05-23 1999-05-04 International Business Machines Corporation Apparatus for protecting memory storage blocks from I/O accesses

Also Published As

Publication number Publication date
JPS6161144B2 (en) 1986-12-24

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