Mechanism for control of address translation by a program...

Details Mechanism for control of address translation by a program... Mechanism for control of address translation by a program...

G - Physics

06

F

354/243

G06F 13/00 (2006.01) G06F 12/06 (2006.01) G06F 12/14 (2006.01)

Patent

CA 1158781

PO3-80-010 ABSTRACT Permits one program in one address space to obtain access to data in another address space or to call a program in another address space without invoking a supervisor. Each of a plurality of address spaces assigned an Address Space Number (ASN) has an associated set of address translation tables. A second address space can be designated by a program, and when author- ized, can cause transfer of data in main memory from one physical location to another associated with the different address space. A program changeable space selection control bit controls use of two different sets of address translation tables associated with two different address spaces. Without invoking a supervisor, a particular program in an assigned address space can call a program in another address space or obtain addressability to data in another address space having an associated set of address translation tables.

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