272489fe59
the implementation can guarantee forward progress in the event of a stuck interrupt or interrupt storm. This is especially critical for fast interrupt handlers, as they can cause a hard hang in that case. When first called, arm_get_next_irq() is passed -1. Obtained from: Juniper Networks, Inc.
133 lines
3.8 KiB
C
133 lines
3.8 KiB
C
/* $NetBSD: intr.c,v 1.12 2003/07/15 00:24:41 lukem Exp $ */
|
|
|
|
/*-
|
|
* Copyright (c) 2004 Olivier Houchard.
|
|
* Copyright (c) 1994-1998 Mark Brinicombe.
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by Mark Brinicombe
|
|
* for the NetBSD Project.
|
|
* 4. The name of the company nor the name of the author may be used to
|
|
* endorse or promote products derived from this software without specific
|
|
* prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
|
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
|
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
|
* IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
|
|
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
|
|
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
|
|
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* Soft interrupt and other generic interrupt functions.
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/syslog.h>
|
|
#include <sys/malloc.h>
|
|
#include <sys/proc.h>
|
|
#include <sys/bus.h>
|
|
#include <sys/interrupt.h>
|
|
#include <sys/conf.h>
|
|
#include <machine/atomic.h>
|
|
#include <machine/intr.h>
|
|
#include <machine/cpu.h>
|
|
|
|
typedef void (*mask_fn)(void *);
|
|
|
|
static struct intr_event *intr_events[NIRQ];
|
|
static int intrcnt_tab[NIRQ];
|
|
static int intrcnt_index = 0;
|
|
static int last_printed = 0;
|
|
|
|
void arm_handler_execute(struct trapframe *, int);
|
|
|
|
void (*arm_post_filter)(void *) = NULL;
|
|
|
|
void
|
|
arm_setup_irqhandler(const char *name, driver_filter_t *filt,
|
|
void (*hand)(void*), void *arg, int irq, int flags, void **cookiep)
|
|
{
|
|
struct intr_event *event;
|
|
int error;
|
|
|
|
if (irq < 0 || irq >= NIRQ)
|
|
return;
|
|
event = intr_events[irq];
|
|
if (event == NULL) {
|
|
error = intr_event_create(&event, (void *)irq, 0, irq,
|
|
(mask_fn)arm_mask_irq, (mask_fn)arm_unmask_irq,
|
|
arm_post_filter, NULL, "intr%d:", irq);
|
|
if (error)
|
|
return;
|
|
intr_events[irq] = event;
|
|
last_printed +=
|
|
snprintf(intrnames + last_printed,
|
|
MAXCOMLEN + 1,
|
|
"irq%d: %s", irq, name);
|
|
last_printed++;
|
|
intrcnt_tab[irq] = intrcnt_index;
|
|
intrcnt_index++;
|
|
|
|
}
|
|
intr_event_add_handler(event, name, filt, hand, arg,
|
|
intr_priority(flags), flags, cookiep);
|
|
}
|
|
|
|
int
|
|
arm_remove_irqhandler(int irq, void *cookie)
|
|
{
|
|
struct intr_event *event;
|
|
int error;
|
|
|
|
event = intr_events[irq];
|
|
arm_mask_irq(irq);
|
|
|
|
error = intr_event_remove_handler(cookie);
|
|
|
|
if (!TAILQ_EMPTY(&event->ie_handlers))
|
|
arm_unmask_irq(irq);
|
|
return (error);
|
|
}
|
|
|
|
void dosoftints(void);
|
|
void
|
|
dosoftints(void)
|
|
{
|
|
}
|
|
|
|
void
|
|
arm_handler_execute(struct trapframe *frame, int irqnb)
|
|
{
|
|
struct intr_event *event;
|
|
int i;
|
|
|
|
PCPU_INC(cnt.v_intr);
|
|
i = -1;
|
|
while ((i = arm_get_next_irq(i)) != -1) {
|
|
intrcnt[intrcnt_tab[i]]++;
|
|
event = intr_events[i];
|
|
if (intr_event_handle(event, frame) != 0) {
|
|
/* XXX: Log stray IRQs */
|
|
arm_mask_irq(i);
|
|
}
|
|
}
|
|
}
|