Abstract: An architecture, method, and apparatus for managing a data buffer (Data Buffer Management DBM). A data buffer within the DBM is an unified linear memory space, and is divided into numbered physical pages with a predetermined page size. A memory map translates logical address spaces for storing/reading DBM transferred data to the physical address spaces. Each packet to be written into DBM is assigned a frame number or frame handler; thereafter, that frame number will be passed by the original owner (a device attached to the data buffer) to different processes for reading out and/or modifying the associated packet or packet data. Frame number assignment is done prior to actual data transfer by request of the data owner. The frame number request is done prior to moving data from the owner's local memory into the DBM's data buffer. Frame number is allocated dynamically by the DBM.

Abstract: A lookup mechanism provides an input value to a datapath element disposed in an execution datapath of a processor and causes the datapath element to compare the input value to stored identifier values. The lookup mechanism receives from the datapath element a result based on the comparison.