Pci flow control
AssigneeArm Limited
InventorsTravis Bailey HAMILTON, Charles Andrew GIEFER
Life of this patent
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Abstract
A data processing apparatus includes interception circuitry for intercepting an incoming signal corresponding to an instruction from a processor element to a PCI device. Respond circuitry provides a response to the incoming signal back to the processor element and the response is either an acceptance of the incoming signal or a refusal of the incoming signal based on a flow control between the data processing apparatus and the PCI device. Forward circuitry performs a transmission, to the PCI device, of an outgoing signal corresponding to the command after the response has indicated acceptance of the incoming signal.
Claims15
A data processing apparatus comprising:
- interception circuitry configured to intercept an incoming signal corresponding to an instruction from a processor element to a PCI device;
- respond circuitry configured to provide a response to the incoming signal back to the processor element, wherein the response is either an acceptance of the incoming signal or a refusal of the incoming signal based on a flow control between the data processing apparatus and the PCI device;
- and
- forward circuitry configured to perform a transmission, to the PCI device, of an outgoing signal corresponding to the command after the response has indicated acceptance of the incoming signal.
A method of data processing comprising:
- intercepting an incoming signal corresponding to an instruction from a processor element to a PCI device;
- providing a response to the incoming signal back to the processor element, wherein the response is either an acceptance of the incoming signal or a refusal of the incoming signal based on a flow control between the data processing apparatus and the PCI device;
- and
- performing a transmission, to the PCI device, of an outgoing signal corresponding to the command after the response has indicated acceptance of the incoming signal.
A non-transitory computer-readable medium to store computer-readable code for fabrication of a data processing apparatus comprising:
- interception circuitry configured to intercept an incoming signal corresponding to an instruction from a processor element to a PCI device;
- respond circuitry configured to provide a response to the incoming signal back to the processor element, wherein the response is either an acceptance of the incoming signal or a refusal of the incoming signal based on a flow control between the data processing apparatus and the PCI device;
- and
- forward circuitry configured to perform a transmission, to the PCI device, of an outgoing signal corresponding to the command after the response has indicated acceptance of the incoming signal.
Dependencies are inferred from the claim text.