Data snooping direct memory access for pattern detection

Patent metadata

Field	Value
Publication number	US-8943239-B2
Application number	US-201213562076-A
Country	US
Kind code	B2
Filing date	Jul 30, 2012
Priority date	Jul 30, 2012
Publication date	Jan 27, 2015
Grant date	Jan 27, 2015

Abstract

A direct memory access controller for efficiently detecting a character string within memory, the direct memory access controller generating signatures of character strings stored within the memory and comparing the generated signatures with the signature of the character string for which detection is desired.

First claim

What is claimed is:

1. An apparatus comprising:
a register file comprising a first register to store a signature and a second register to store a memory address;
a first-in-first-out (FIFO) buffer having an output;
control logic to load characters into the FIFO buffer where the first character loaded into the FIFO buffer has a first address equal to the memory address stored in the second register;
a tapped delay line coupled to the output of the FIFO buffer, the tapped dela…

Assignees

• Shen Jian
• Li Jing
• Qualcomm Inc

Inventors

• Shen Jian
• Li Jing

Classifications

• G06F7/02 Primary

  Physics · mapped topic

• G06F2207/025

  Physics · mapped topic