Resources Contact Us Home
System and method for maintaining translation look-aside buffer (TLB) consistency

Image Number 9 for United States Patent #6105113.

A system and method for maintaining consistency between translational look-aside buffers (TLB) and page tables. A TLB has a TLB table for storing a list of virtual memory address-to-physical memory address translations, or page table entries (PTES) and a hardware-based controller for invalidating a translation that is stored in the TLB table when a corresponding page table entry changes. The TLB table includes a virtual memory (VM) page tag and a page table entry address tag for indexing the list of translations The VM page tag can be searched for VM pages that are referenced by a process. If a referenced VM page is found, an associated physical address is retrieved for use by the processor. The TLB controller includes a snooping controller for snooping a cache-memory interconnect for activity that affects PTEs. The page table entry address tag can be searched by a search engine in the TLB controller for snooped page table entry addresses. The TLB controller includes an updating module for invalidating or updating translations associated with snooped page table entry addresses. Translations in TLBs are thus updated or invalidated through hardware when an operating system changes a PTE, without intervention by an operating system or other software.

  Recently Added Patents
Semiconductor light-receiving device
Information processing using batch setting information
Apparatus and methods for color displays
Managing job execution
Data security for dynamic random access memory using body bias to clear data at power-up
Methods and apparatus for voltage selection for a MOSFET switch device
Semiconductor device
  Randomly Featured Patents
Variable-band switching system for voice and data communication
Bleacher seating system
Method for changing the color of a substrate coating by application of a stimulus
Position adjustment device for steering wheel
Motor vehicle stopping distance warning apparatus and method
Bean bag game target
Method and system for an efficient implementation of the Bluetooth.RTM. subband codec (SBC)
Superconducting alloys comprising tungsten, molybdenum, silicon and oxygen
Photoelectric conversion device and image pickup system with photoelectric conversion device
Stator of a rotating electric machine