Abstract:
An interface is described which has at least one chip side port with a first plurality of pins for conveying fields of a packet and first and second circuit side ports each port having a set of pins with a lower number than the first set of pins in the chip side port. The interface is constructed so that interrupt signals from an off-chip circuit can be conveyed on-chip in a manner such that the interrupt signals are indistinguishable from interrupt signals received from on-chip modules connected to an on-chip communication path. The same principle is applicable to power-down signals.
Abstract:
A prototype system is described having an integrated circuit including an on-chip processor and an on-chip router connected to off-chip resources via an interface. A request directing unit on the chip receives memory access requests and directs them in accordance with either one of two address maps. In one of the address maps, a first range of addresses is allocated to at least one on-chip resource and a second range of addresses is allocated to the interface. In the other memory address map, the first range of addresses is also allocated to the interface. An integrated circuit including such a request directing unit is also described, together with a method for evaluating a prototype system.
Abstract:
An apparatus schedules communications in a wireless communication system comprising a plurality of wireless stations (103-107) operable to communicate wirelessly with each other in accordance with a time division multiple access scheme. The apparatus comprises a receiver (303) for receiving resource requests from the plurality of wireless stations (103-107). A scheduler (305) schedules air interface resource to communications between the plurality wireless stations by allocating time intervals in repeating scheduling intervals. A transmitter (301) transmits scheduling messages providing indications of the scheduling to the plurality of wireless stations (103-107). An adapter (307) adapts a duration of at least one scheduling interval of the repeating scheduling intervals in response to the resource requests from the plurality of wireless stations (103-107).
Abstract:
A package includes a first die and a second die. The dies are connected to each other through an interface. At least one of the first and second dies includes a plurality of signal sources, wherein each source has at least one quality of service parameter associated therewith, and a plurality of queues having a different priorities. A signal from a respective one of the signal sources is allocated to one of the plurality of queues in dependence on the at least one quality of service parameter associated with the respective signal source. The interface is configured such that signals from said queues are transported from one of said first and second dies to the other of said first and second dies.
Abstract:
A first cache arrangement including an input configured to receive a memory request from a second cache arrangement; a first cache memory for storing data; an output configured to provide a response to the memory request for the second cache arrangement; and a first cache controller; the first cache controller configured such that for the response to the memory request output by the output, the cache memory includes no allocation for data associated with the memory request.
Abstract:
A package includes a die and at least one further die. The die has an interface configured to receive a transaction request from the further die via an interconnect and to transmit a response to the transaction request to said further die via the interconnect. The die also has mapping circuitry which is configured to allocate to the received transaction a local source identity information as source identity information, the local source identity information comprising one of a set of reusable local source identity information. This ensures the order of transactions tagged with a same original source identity and target and allows transactions tagged with different source identifiers to be processed out of order.
Abstract:
A package includes a first die and a second die, at least one of said first and second dies being a memory. The dies are connected to each other through an interface. The interface is configured to transport a plurality of control signals. The number of control signals is greater than a width of the interface. At least one of the first and second dies performs a configurable grouping so as to provide a plurality of groups of control signals. The signals within a group are transmitted across the interface together.
Abstract:
A package includes a first die and a second die. The dies are connected to each other through an interface. The package includes interrupt processing for detecting interrupt information and providing a packet in response to the interrupt information detection. The packet includes an address to which data in the packet is to be written. The interface is configured to transport the packet between the dies. A data store is provided to which the data is writable. An interrupt event is determined from data received in several packets.
Abstract:
A package includes a first die and a second die, at least one of said first and second dies being a memory. The dies are connected to each other through an interface. The interface is configured to transport both control signals and memory transactions. A sampling circuit samples the control signals before transport on the interface. The sampling circuit is controlled in dependence on at least one quality of service parameter associated with a respective control signal.
Abstract:
Systems and methods for pre-fetching data are disclosed that use a cache memory for storing a copy of data stored in a system memory and mechanism to initiate a pre-fetch of data from the system memory into the cache memory. The system further comprises an event monitor for monitoring events that is connected to a path on which signals representing an event are transmitted between one or more event generating modules and a processor. In some embodiments, the event monitor initiates a pre-fetch of a portion of data in response to the event monitor detecting an event indicating the availability of the portion of data in the system memory.