International Business Machines Corporation

Paul B Kubista

Daniel Frank Moertl

Robert Neal Carlton Broberg, Iii

Daniel Paul Wetzel

Robert Neal Broberg, Iii

Gerald David Miller

A method, a data structure, a computer program product and a computer for testing digital designs defining integrated circuits in a HDL before actually building the integrated circuits and, more specifically, for creating standard test environments for digital designs. One embodiment provides a method of creating an entity description for use in an automated testing environment, the entity description defining an entity of an integrated circuit in a hardware description language, the entity of the integrated circuit comprising at least one interface having a plurality of ports each associated with a pre-determined function. The method comprises, for at least one port of the plurality of ports, associating at least one indication of a specific procedure call with the at least one port, the specific procedure call defining the pre-determined function of the at least one port.

Creating standard VHDL test environments

A method and apparatus is provided for an Ethernet station that transmits blocks of Ethernet frames in datagrams utilizing a pointer at the beginning of the datagram, rather than interrupts at the beginning and end of each data frame. Hardware receives a pointer to the start of an IP datagram and is then prompted to transmit. Hardware forms the frame header and sends out the IP datagram as a series of frames with only one interrupts signaling the end of the datagram. As a transmission comes in to the receiving station, hardware will check first to see if this is part of an IP datagram currently being received. If not, the frame is stored in a new location. If it is part of a datagram that is currently being received, hardware will check an offset in the IP header to determine where the new frame should be placed so the IP datagram is assembled properly. An interrupt is generated as the final frame is received by the receiving station, thus eliminating multiple interrupts after each frame at both transmitting and receiving station.

Method and apparatus for converting IP datagram to/from ethernet frames

A transaction tracing circuit for use with a bus bridge that is couplable to at least a first and second bus. The transaction tracing circuit includes at least one set of trace control registers that is associated with a transaction tracing function for tracing a specific transaction occurring on the bus bridge. A number of bus transaction tracing circuits, one for each bus to which the bridge is connected, are coupled to the trace control registers and are utilized to store is transactions that are captured as they occur on the individual buses. An internal transaction tracing circuit is coupled to the trace control registers and is utilized for storing captured internal transaction information corresponding to the specific internal transaction.

Bus bridge with embedded input/output (I/O) and transaction tracing capabilities

Within a communication node, low level hardware is programmed and provided with filter data to accept broadcast frames. A high level layer of hardware, utilizing the pre-loaded, pre-defined comparison data, checks incoming frame header information. Based on pre-defined filter data or reference values loaded into low level registers, the high-level hardware will reject or accept submitted data communication frames. This method reduces the requirement for software to operate on each incoming frame header, thus reducing load on the processor.

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West Concord, MN, United States of America

Paul B Kubista