Diablo Technologies Inc.

Rambus Inc.

Zarbana Digital Fund LLC

Maher Amer

Michael Lewis Takefman

Riccardo Badalone

Claus Reitlingshoefer

Bart Trojanowski

A system for interfacing with a co-processor or input/output device is disclosed. According to one embodiment, the system includes a computer processing unit, a memory module, a memory bus that connects the computer processing unit and the memory module and a co-processing unit or input/output device, wherein the memory bus also connects the co-processing unit or input/output device to the computer processing unit.

System and method of interfacing co-processors and input/output devices via a main memory system

A system and method are directed to providing a configurable timing control of a memory system. In one embodiment, the system has a first interface to receive a DIMM clock and configuration information, a second interface to a first data bus, and a third interface to a second data bus. The system further has a plurality of flip-flops, a multiplexor coupled to the plurality of flip-flops, a first control block for controlling to hold an input data within the plurality of flipflops, and a second control block for controlling a timing of an output data from the plurality of flip-flops via the multiplexor with a programmable delay. The input data is received via the second interface. The programmable delay is received via the first interface. The output data is sent out with the timing delay via the third interface.

System and method for providing a configurable timing control for a memory system

A method of implementing a multi-threaded device driver for a computer system is disclosed. A polling device driver is partitioned into a plurality of driver threads for controlling a device of a computer system. The device has a first device state of an unscouted state and a scouted state, and a second device state of an inactive state and an active state. A driver thread of the plurality of driver threads determines that the first device state of the device state is in the unscouted state, and changes the first state of the device to the scouted state. The driver thread further determines that the second device state of the device is in the inactive state and changes the second device state of the device to the active state. The driver thread executes an operation on the device during a pre-determined time slot configured for the driver thread.

System and method for implementing a multi-threaded device driver in a computer system

A system and method for providing a configurable timing control of a memory system is provided. One system has a first interface to receive a DIMM clock and configuration information, a second interface to a first data bus, and a third interface to a second data bus. The system further has flip-flops, a multiplexer coupled to the flip-flops, a first control block for controlling to hold an input data within the flip-flops, and a second control block for controlling a timing of an output data from the flip-flops via the multiplexer with a programmable delay. The input data is received via the second interface. The programmable delay is received via the first interface. The output data is sent out with the timing delay via the third interface.

A polling device driver is partitioned into a plurality of driver threads for controlling a device of a computer system. The device has a first device state of an unscouted state and a scouted state, and a second device state of an inactive state and an active state. A driver thread of the plurality of driver threads determines that the first device state of the device state is in the unscouted state, and changes the first state of the device to the scouted state. The driver thread further determines that the second device state of the device is in the inactive state and changes the second device state of the device to the active state. The driver thread executes an operation on the device during a pre-determined time slot configured for the driver thread.

A system and method for providing a configurable timing control of a memory system is disclosed. In one embodiment, the system has a first interface to receive a DIMM clock and configuration information, a second interface to a first data bus, and a third interface to a second data bus. The system further has a plurality of flip-flops, a multiplexor coupled to the plurality of flip-flops, a first control block for controlling to hold an input data within the plurality of flip-flops, and a second control block for controlling a timing of an output data from the plurality of flip-flops via the multiplexor with a programmable delay. The input data is received via the second interface. The programmable delay is received via the first interface. The output data is sent out with the timing delay via the third interface.

A system for interfacing with a co-processor or input/output device is disclosed. According to one embodiment, the system includes a computer processing unit, a memory module, a memory bus that connects the computer processing unit and the the memory module, and a co-processing unit or input/output device, wherein the memory bus also connects the co-processing unit or input/output device to the computer processing unit.

A system for interfacing with a co-processor or input/output device is disclosed. According to one embodiment, the system provides a one-hot address cache comprising a plurality of one-hot addresses and a host interface to a host memory controller of a host system. Each one-hot address of the plurality of one-hot addresses has a bit width. The plurality of one-hot addresses is configured to store the data associated with a corresponding memory address in an address space of a memory system and provide the data to the host memory controller during a memory map learning process. The plurality of one-hot addresses comprises a zero address of the bit width and a plurality of non-zero addresses of the bit width, and each one-hot address of the plurality of non-zero addresses of the one-hot address cache has only one non-zero address bit of the bit width.

System and method for providing an address cache for memory map learning

A system for interfacing with a co-processor or input/output device is disclosed. According to one embodiment, the system performs a maze unlock sequence by operating a memory device in a maze unlock mode. The maze unlock sequence involves writing a first data pattern of a plurality of data patterns to a memory address of the memory device, reading a first set of data from the memory address, and storing the first set of data in a validated data array. The maze unlock sequence further involves writing a second data pattern of the plurality of data patterns to the memory address, reading a second set of data from the memory address, and storing the second set of data in the validated data array. A difference vector array is generated from the validate data array and an address map of the memory device is identified based on the difference vector array.

System and method for unlocking additional functions of a module

A system for interfacing with a co-processor or input/output device is disclosed. According to one embodiment, the system is configured to receive a command from a host memory controller of a host system and store the command in a command buffer entry. The system determines that the command is complete using a buffer check logic and provides the command to a command buffer. The command buffer comprises a first field that specifies an entry point of the command within the command buffer entry.

System and method for providing a command buffer in a memory system

A load reduction dual in-line memory module (LRDIMM) is similar to a registered dual in-line memory module (RDIMM) in which control signals are synchronously buffered but the LRDIMM includes a load reduction buffer (LRB) in the data path as well. To make an LRDIMM which appears compatible with RDIMMs on a system memory bus, the serial presence detector (SPD) of the LRDIMM is programmed with modified latency support and minimum delay values. When the dynamic read only memory (DRAMs) devices of the LRDIMM are subsequently set up by the host at boot time based on the parameters provided by the SPD, selected latency values are modified on the fly in an enhanced register phase look loop (RPLL) device. This has the effect of compensating for the delay introduced by the LRB without violating DRAM constraints, and provides memory bus timing for a LRDIMM that is indistinguishable from that of a RDIMM.

Load reduction dual in-line memory module (LRDIMM) and method for programming the same

A system and method for offsetting the data buffer latency in a CPIO device having a JEDEC standard DDR-4 LRDIMM chipset as the front end is disclosed. According to one embodiment, a CPIO ASIC provides variable timing control for its DDR-4 LRDIMM interface such that propagation delay of the data buffers can be offset by the CPIO ASIC, allowing the CPIO LRDIMM to be timing compatible with an RDIMM.

Growing community of inventors

Nepean, Canada

Maher Amer