Method for request transaction ordering in OCP bus to AXI...

Details Method for request transaction ordering in OCP bus to AXI... Method for request transaction ordering in OCP bus to AXI...

2006-07-20

2008-11-25

Dang, Khanh (Department: 2111)

Electrical computers and digital data processing systems: input/

Intrasystem connection

Bus interface architecture

C710S105000, C710S305000, C710S306000, C710S100000

Reexamination Certificate

active

07457905

ABSTRACT:
A request transaction ordering method and system includes designing of the Open Core Protocol (OCP) bus to an Advanced extensible Interface (AXI) bus bridge. The general flow of the bridge is to accept a plurality of read and write requests from the OCP bus and convert them to a plurality of AXI read and write requests. Control logic is set for each first in first out policy of push and pop control and for a plurality of handshake signals in OCP and in the AXI. The request ordering part of the bridge performs hazard checking to preserve required order policies for both OCP and AXI bus protocols by using a FIFO (first in first out) policy to hold the outstanding writes, a plurality of comparators, a first in first out policy to hold OCP identities for a plurality of read requests.

REFERENCES:
patent: 2007/0168645 (2007-07-01), Grabner et al.
patent: 2007/0234006 (2007-10-01), Radulescu et al.

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