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Differential D37688 Diff 138386 sys/kern/kern_intr.c

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sys/kern/kern_intr.c

Show First 20 Lines • Show All 1,340 Lines • ▼ Show 20 Linesithread_loop(void *arg)
} }
} }
/* /*
* Main interrupt handling body. * Main interrupt handling body.
* *
* Input: * Input:
* o ie: the event connected to this interrupt. * o ie: the event connected to this interrupt.
* o frame: some archs (i.e. i386) pass a frame to some. * o frame: the current trap frame.
* handlers as their main argument. *
* Return value: * Return value:
* o 0: everything ok. * o 0: everything ok.
* o EINVAL: stray interrupt. * o EINVAL: stray interrupt.
*/ */
int int
intr_event_handle(struct intr_event *ie, struct trapframe *frame) intr_event_handle(struct intr_event *ie, struct trapframe *frame)
{ {
struct intr_handler *ih; struct intr_handler *ih;
Show All 10 Lines
#endif #endif
/* An interrupt with no event or handlers is a stray interrupt. */ /* An interrupt with no event or handlers is a stray interrupt. */
if (ie == NULL || CK_SLIST_EMPTY(&ie->ie_handlers)) if (ie == NULL || CK_SLIST_EMPTY(&ie->ie_handlers))
return (EINVAL); return (EINVAL);
/* /*
* Execute fast interrupt handlers directly. * Execute fast interrupt handlers directly.
* To support clock handlers, if a handler registers
* with a NULL argument, then we pass it a pointer to
* a trapframe as its argument.
*/ */
td->td_intr_nesting_level++; td->td_intr_nesting_level++;
filter = false; filter = false;
thread = false; thread = false;
ret = 0; ret = 0;
critical_enter(); critical_enter();
oldframe = td->td_intr_frame; oldframe = td->td_intr_frame;
td->td_intr_frame = frame; td->td_intr_frame = frame;
Show All 12 Lines if ((ih->ih_flags & IH_SUSP) != 0)
continue; continue;
if ((ie->ie_flags & IE_SOFT) != 0 && ih->ih_need == 0) if ((ie->ie_flags & IE_SOFT) != 0 && ih->ih_need == 0)
continue; continue;
if (ih->ih_filter == NULL) { if (ih->ih_filter == NULL) {
thread = true; thread = true;
continue; continue;
} }
CTR4(KTR_INTR, "%s: exec %p(%p) for %s", __func__, CTR4(KTR_INTR, "%s: exec %p(%p) for %s", __func__,
ih->ih_filter, ih->ih_argument == NULL ? frame : ih->ih_filter, ih->ih_argument, ih->ih_name);
ih->ih_argument, ih->ih_name);
if (ih->ih_argument == NULL)
ret = ih->ih_filter(frame);
else
ret = ih->ih_filter(ih->ih_argument); ret = ih->ih_filter(ih->ih_argument);
#ifdef HWPMC_HOOKS #ifdef HWPMC_HOOKS
PMC_SOFT_CALL_TF( , , intr, all, frame); PMC_SOFT_CALL_TF( , , intr, all, frame);
#endif #endif
KASSERT(ret == FILTER_STRAY || KASSERT(ret == FILTER_STRAY ||
((ret & (FILTER_SCHEDULE_THREAD | FILTER_HANDLED)) != 0 && ((ret & (FILTER_SCHEDULE_THREAD | FILTER_HANDLED)) != 0 &&
(ret & ~(FILTER_SCHEDULE_THREAD | FILTER_HANDLED)) == 0), (ret & ~(FILTER_SCHEDULE_THREAD | FILTER_HANDLED)) == 0),
("%s: incorrect return value %#x from %s", __func__, ret, ("%s: incorrect return value %#x from %s", __func__, ret,
ih->ih_name)); ih->ih_name));
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