Method and apparatus for processing data in an embedded system

• US 8,667,254 B1
• Filed: 05/15/2008
• Issued: 03/04/2014
• Est. Priority Date: 05/15/2008
• Status: Active Grant

• Current Assignee: Xilinx, Inc. (Advanced Micro Devices, Inc.)
• Original Assignee: Xilinx, Inc. (Advanced Micro Devices, Inc.)
• Inventors: Rohrer, Carl F., Secatch, Stacey, Smith, Patrick J.
• Primary Examiner(s): LI, AIMEE J
• Application Number:
  US12/121,614
• Time in Patent Office: 2,119 Days
• Field of Search: 712/34, 712/33, 712/225
• US Class Current: 712/33
• CPC Class Codes: G06F 15/167 using a common memory, e.g. mailbox

Abstract

In one embodiment, a network device is disclosed. For example, in one embodiment of the present invention, the device comprises a processor and a core memory having a receive buffer and a transmit buffer. The device comprises a bus coupled to the processor and the core memory. The device comprises at least one co-processor coupled to the core memory via a direct link, wherein the at least one co-processor is capable of accessing at least one of: the receive buffer, or the transmit buffer, without assistance from the processor.

Claims

1. A device, comprising:

a processor;

a core memory having a receive buffer and a transmit buffer;

a bus coupled to the processor and the core memory;

at least one co-processor separate from the core memory and coupled to the core memory via a direct link that is accessible only by the at least one co-processor and by the core memory, wherein the at least one co-processor accesses at least one of;

the receive buffer of the core memory, or the transmit buffer of the core memory, without assistance from the processor; and

at least one network interface providing a direct path between the core memory and a network;

wherein;

the receive buffer has a plurality of portions and the transmit buffer has a plurality of portions;

a first one of the portions of the receive buffer and a first one of the portions of the transmit buffer are dedicated to network and bus access;

a second one of the portions of the receive buffer and a second one of the portions of the transmit buffer are dedicated to co-processor and bus access; and

a third one of the portions of the receive buffer and a third one of the portions of the transmit buffer are dedicated to network and co-processor access.

2. The device of claim 1, wherein the device comprises a Media Oriented Systems Transport (MOST) device.

3. The device of claim 1, wherein the at least one network interface directly couples the core memory with another device in the network.

4. The device of claim 1, wherein the network is a ring network.

5. The device of claim 1, wherein the at least one co-processor performs at least one of:

an encryption function, a decryption function, an encoding function, a decoding function, a transcoding function, a format conversion function, a filtering function, a masking function, a compression function, a decompression function, a noise-cancellation function, or an equalization function.

6. The device of claim 1, wherein a plurality of logical channels is mapped to the plurality of portions.

7. The device of claim 1, wherein the core memory provides a status signal to the at least one co-processor, wherein the status signal indicates whether the core memory is available for access via the direct link.

8. The device of claim 1, wherein the device comprises a programmable logic device (PLD).

9. The device of claim 1, wherein the device comprises an integrated circuit having a programmable portion.

10. A method for accessing data stored in a core memory having a receive buffer and a transmit buffer, comprising:

dividing the receive buffer into a plurality of portions and the transmit buffer into a plurality of portions;

dedicating access to a first one of the portions of the receive buffer and a first one of the portions of the transmit buffer to at least one network interface and to a bus;

dedicating access to a second one of the portions of the receive buffer and a second one of the portions of the transmit buffer to at least one co-processor and the bus;

dedicating access to a third one of the portions of the receive buffer and a third one of the portions of the transmit buffer to the at least one network interface and the at least one co-processor;

reading data from at least one of;

the receive buffer of the core memory or the transmit buffer of the core memory, by the at least one co-processor via a direct link, wherein the at least one co-processor is separate from the core memory, and wherein the core memory is coupled to the at least one network interface that provides a direct path between the core memory and a network;

processing the data by the at least one co-processor to produce processed data; and

writing the processed data to at least one of;

the receive buffer of the core memory or the transmit buffer of the core memory, by the at least one co-processor via the direct link that is accessible only by the at least one co-processor and by the core memory, wherein the at least one co-processor performs the reading and the writing without assistance from a processor that is coupled to the core memory via the bus.

11. The method of claim 10, wherein the core memory, the at least one co-processor, and the processor are deployed in a Media Oriented Systems Transport (MOST) device.

12. The method of claim 11, wherein the MOST device comprises a programmable logic device (PLD).

13. The method of claim 10, wherein the at least one co-processor processes the data in accordance with at least one of:

an encryption function, a decryption function, an encoding function, a decoding function, a transcoding function, a format conversion function, a filtering function, a masking function, a compression function, a decompression function, a noise-cancellation function, or an equalization function.

14. The method of claim 10, wherein the core memory is divided into a plurality of portions, wherein at least one portion of the plurality of portions is an ingress portion, and wherein at least one portion of the plurality of portions is an egress portion.

15. The method of claim 14, wherein a plurality of logical channels is mapped to the plurality of portions.

16. The method of claim 10, further comprising:

providing a status signal by the core memory to the at least one co-processor, wherein the status signal indicates whether the core memory is available for access via the direct link.

17. A non-transitory computer-readable medium having stored thereon a plurality of instructions, the plurality of instructions including instructions which, when executed by a processor, cause the processor to perform a method for accessing data stored in a core memory having a receive buffer and a transmit buffer, comprising:

dividing the receive buffer into a plurality of portions and the transmit buffer into a plurality of portions;

dedicating access to a first one of the portions of the receive buffer and a first one of the portions of the transmit buffer to at least one network interface and to a bus;

dedicating access to a second one of the portions of the receive buffer and a second one of the portions of the transmit buffer to at least one co-processor and the bus;

dedicating access to a third one of the portions of the receive buffer and a third one of the portions of the transmit buffer to the at least one network interface and the at least one co-processor;

reading data from at least one of;

the receive buffer of the core memory or the transmit buffer of the core memory, by the at least one co-processor via a direct link, wherein the at least one co-processor is separate from the core memory, and wherein the core memory is coupled to the at least one network interface that provides a direct path between the core memory and a network;

processing the data by the at least one co-processor to produce processed data; and

writing the processed data to at least one of;

the receive buffer of the core memory or the transmit buffer of the core memory, by the at least one co-processor via the direct link that is accessible only by the at least one co-processor and by the core memory, wherein the at least one co-processor performs the reading and the writing without assistance from a processor that is coupled to the core memory via the bus.

18. A method for accessing data stored in a core memory having a receive buffer and a transmit buffer, comprising:

dividing the receive buffer into a plurality of portions and the transmit buffer into a plurality of portions;

dedicating access to a first one of the portions of the receive buffer and a first one of the portions of the transmit buffer to at least one network interface and to a bus;

dedicating access to a second one of the portions of the receive buffer and a second one of the portions of the transmit buffer to a co-processor and the bus;

dedicating access to a third one of the portions of the receive buffer and a third one of the portions of the transmit buffer to the at least one network interface and the co-processor;

receiving a status signal by the co-processor from the core memory via a direct link that is accessible only by the co-processor and by the core memory, wherein the co-processor is separate from the core memory, and wherein the core memory is coupled to at least one network interface that provides a direct path between the core memory and a network;

determining whether the core memory is available for access; and

accessing the core memory directly by the co-processor if the core memory is deemed to be available for access.