Files | |
file | intr.c |
Interrupt management. | |
Functions | |
int | xnintr_init (xnintr_t *intr, unsigned irq, xnisr_t isr, xnflags_t flags) |
Initialize an interrupt object. | |
int | xnintr_destroy (xnintr_t *intr) |
Destroy an interrupt object. | |
int | xnintr_attach (xnintr_t *intr, void *cookie) |
Attach an interrupt object. | |
int | xnintr_detach (xnintr_t *intr) |
Detach an interrupt object. | |
int | xnintr_enable (xnintr_t *intr) |
Enable an interrupt object. | |
int | xnintr_disable (xnintr_t *intr) |
Disable an interrupt object. | |
xnarch_cpumask_t | xnintr_affinity (xnintr_t *intr, xnarch_cpumask_t cpumask) |
Set processor affinity. |
|
Set processor affinity. Causes the IRQ associated with the interrupt object intr to be received only on processors which bits are set in cpumask.
|
|
Attach an interrupt object. Attach an interrupt object previously initialized by xnintr_init(). After this operation is completed, all IRQs received from the corresponding interrupt channel are directed to the object's ISR.
This service can be called from:
Rescheduling: never. |
|
Destroy an interrupt object. Destroys an interrupt object previously initialized by xnintr_init(). The interrupt object is automatically detached by a call to xnintr_detach(). No more IRQs will be dispatched by this object after this service has returned.
This service can be called from:
Rescheduling: never. |
|
Detach an interrupt object. Detach an interrupt object previously attached by xnintr_attach(). After this operation is completed, no more IRQs are directed to the object's ISR, but the interrupt object itself remains valid. A detached interrupt object can be attached again by a subsequent call to xnintr_attach().
This service can be called from:
Rescheduling: never. |
|
Disable an interrupt object. Disables the hardware interrupt line associated with an interrupt object. This operation invalidates further interrupt requests from the given source until the IRQ line is re-enabled anew.
This service can be called from:
Rescheduling: never. |
|
Enable an interrupt object. Enables the hardware interrupt line associated with an interrupt object. Over real-time control layers which mask and acknowledge IRQs, this operation is necessary to revalidate the interrupt channel so that more interrupts can be notified.
This service can be called from:
Rescheduling: never. |
|
Initialize an interrupt object. Associates an interrupt object with an IRQ line. When an interrupt occurs from the given irq line, the ISR is fired in order to deal with the hardware event. The interrupt service code may call any non-suspensive service from the nucleus. Upon receipt of an IRQ, the ISR is immediately called on behalf of the interrupted stack context. The status value returned by the ISR is then checked for the following bits:
This service can be called from:
Rescheduling: never. |