Load page table entry address instruction execution based on an address translation format control field

US8930673B2 · kind B2 · utility

Assignee

• International Business Machines Corporation · US

Inventors

• Dan F. Greiner · San Jose, US
• Lisa C. Heller · Rhinebeck, US
• Damian L. Osisek · Vestal, US
• Erwin Pfeffer · Eppelheim, DE
• Timothy J. Slegel · Staatsburg, US
• Gustav E. Sittmann, III · Webster Groves, US

Key dates

• Filing date: Oct 29, 2013
• Grant date: Jan 6, 2015
• Expiry date: Oct 29, 2033

Classification

• Technology area (CPC G): Physics
• CPC primary: G06F2212/652
• WIPO field: Computer technology
• WIPO sector: Electrical engineering

Abstract

What is provided is a load page table entry address function defined for a machine architecture of a computer system. In one embodiment, a machine instruction is obtained which contains an opcode indicating that a load page table entry address function is to be performed. The machine instruction contains an M field, a first field identifying a first general register, and a second field identifying a second general register. Based on the contents of the M field, an initial origin address of a hierarchy of address translation tables having at least one segment table is obtained. Based on the obtained initial origin address, dynamic address translation is performed until a page table entry is obtained. The page table entry address is saved in the identified first general register.