Resources Contact Us Home
Fast linear tag validation unit for use in microprocessor

Image Number 8 for United States Patent #6157986.

A linearly addressed cache capable of fast linear tag validation after a context switch or a translation lookaside buffer (TLB) flush. The cache is configured to validate multiple linear address tags to improve performance in systems which experience frequent context switches or TLB flushes. The cache comprises: a data array configured to store a plurality of cache lines, a linear tag array, a physical tag array, and a TLB. Each array is configured to receive a portion of a requested address. Each linear tag stored in the linear tag array corresponds to one cache line stored within the data array. Each physical tag stored in the physical tag array also corresponds to one cache line stored within the data array. The TLB is configured to store linear to physical address translations, while the linear tag array is configured to store status information for each linear tag. The status information comprises a linear tag valid bit and an enable compare bit. The linear tag array is configured as a content addressable memory and is configured to perform a parallel comparison of a first portion of the requested address with each of the plurality of stored linear tags. If one of the tags match, the linear tag array sets the corresponding valid bits if the corresponding enable compare bits are set. The linear tag array may also be configured to clear the enable compare bits in parallel.

  Recently Added Patents
Masking method and apparatus
Drugs for prophylaxis or mitigation of taxane-induced neurotoxicity
Method and system for determining an optimal missile intercept approach direction for correct remote sensor-to-seeker handover
Pattern forming method using developer containing organic solvent and rinsing solution for use in the pattern forming method
Inducement of organogenetic tolerance for pancreatic xenotransplant
In-store marketing sign
Forming agent for gate insulating film of thin film transistor
  Randomly Featured Patents
Rotary die cutter
Energy subtraction processing apparatus, method, and radiation image diagnosis system
Method and system for suppression of features in digital images of content
Semiconductor device having a ground plane and manufacturing method thereof
Frozen confection container
Conveyor with a multiple part beam
Swimming goggle
Systems and methods for managing and distributing media content
Nanotube array light emitting diodes
Drift advancing or mining machine