Apparatus and method for handling peripheral device interrupts

Details Apparatus and method for handling peripheral device interrupts Apparatus and method for handling peripheral device interrupts

G - Physics

06

F

G06F 13/24 (2006.01) G06F 13/10 (2006.01)

Patent

CA 2356179

A computer system having a PCI expansion connector (30) and further including: an operating system operable to detect a PCI-to-PCMCIA bridge on the PCI expansion connector and in response thereto to allocate a legacy interrupt channel for interrupts originating from the PCI-to-PCMCIA bridge, and also operable to detect connection of a PCMCIA card to the PCI-to-PCMCIA bridge and in response thereto to allocate a further legacy interrupt channel for interrupts originating from the PCMCIA card; and a device driver for a PCI-to- PCMCIA bridge, the device driver including a trap mechanism operable to intercept PCI interrupts received through the PCI expansion connector and, in response to interception of a PCI interrupt, to call an interrupt management routine operable to determine that one of said legacy interrupt channel and said further legacy interrupt channel associated with the intercepted PCI interrupt and to call an interrupt service routine using the determined legacy interrupt channel as an operand.

L'invention concerne un système informatique comprenant un connecteur d'expansion PCI (30) ainsi qu'un système d'exploitation permettant de détecter un pont PCI-PCMCIA sur le connecteur d'expansion PCI et, en réponse, d'attribuer un canal d'interruption existant pour les interruptions provenant du pont PCI-PCMCIA. Ce système d'exploitation permet également de détecter la connexion d'une carte PCMCIA au pont PCI-PCMCIA et, en réponse, d'attribuer un nouveau canal d'interruption existant pour les interruptions provenant de la carte PCMCIA. Ce système informatique comprend en outre un pilote de périphérique pour un pont PCI-PCMCIA, ce pilote de périphérique comprenant un mécanisme de piégeage permettant d'intercepter les interruptions PCI reçues via le connecteur d'expansion PCI et, en réponse à l'interception d'une interruption PCI, de faire appel à une routine de gestion d'interruption permettant de déterminer celui parmi lesdits canaux d'interruption existants qui est associé à l'interruption PCI interceptée et de faire appel à une routine de service d'interruption en utilisant le canal d'interruption existant déterminé comme un opérande.

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