Mode setting method and system in hot plug of PCI device
AssigneeNEC Computertechno, Ltd.
InventorKoji Abumi
Life of this patent
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Abstract
The invention is to provide a mode setting method and a system including a PCI bus in the hot plug of a PCI device which is capable of supporting a platform unique function for a PCI device that is hot-added. Therefore, in a system including a PCI bus according to an exemplary embodiment of the invention, a south bridge directly notifies firmware that a PCI device is hot-added and thus, it is possible to support the platform unique function for the hot-added PCI device without modifying an OS or an open hot plug driver.
Claims8
A mode setting method in the hot plug of a PCI device, the method comprising:
- notifying the hot add of the PCI device to firmware from a south bridge,
- wherein issuance of a config access command from a processor is retried until issuance of a config read command from the south bridge has been completed.
A mode setting method in the hot plug of a PCI device, the method comprising:
- notifying that the PCI device is hot added at a south bridge of a system including a PCI bus to firmware from a south bridge;
- and
- automatically reading information of a vendor ID and a device ID of the hot-added PCI device, which is required for mode setting, from the PCI device and transmitting the information to the firmware by the south bridge, thereby allowing to set the mode of a platform unique function to support the PCI device that is hot-added to the system,
- wherein issuance of a config access command from a processor is retried until issuance of a config read command from the south bridge has been completed.
A system including a PCI bus, the system comprising:
- a mode setting unit that controls a south bridge to notify firmware that a PCI device is hot-added;
- and,
- a unit that suspends issuance of a config read command to the PCI device until a config access command from a processor is received.
A system including a PCI bus comprising:
- a PCI bus;
- firmware;
- a PCI device;
- and
- a south bridge that notifies the firmware that the PCI device is hot-added, automatically reads information of a vendor ID and a device ID of the hot-added PCI device, which is required for mode setting, from the PCI device, and transmits the information to the firmware,
- wherein issuance of a config access command from a processor is retried until issuance of a config read command from the south bridge has been completed.
Dependencies are inferred from the claim text.