NetBSD-5.0.2/sys/arch/arc/arc/interrupt.c
/* $NetBSD: interrupt.c,v 1.4 2008/03/14 16:43:27 tsutsui Exp $ */
/* $OpenBSD: trap.c,v 1.22 1999/05/24 23:08:59 jason Exp $ */
/*
* Copyright (c) 1992, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* the Systems Programming Group of the University of Utah Computer
* Science Department and Ralph Campbell.
*
* 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. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS 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.
*
* from: Utah Hdr: trap.c 1.32 91/04/06
*
* @(#)trap.c 8.5 (Berkeley) 1/11/94
*/
/*
* Copyright (c) 1988 University of Utah.
*
* This code is derived from software contributed to Berkeley by
* the Systems Programming Group of the University of Utah Computer
* Science Department and Ralph Campbell.
*
* 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 the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS 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.
*
* from: Utah Hdr: trap.c 1.32 91/04/06
*
* @(#)trap.c 8.5 (Berkeley) 1/11/94
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: interrupt.c,v 1.4 2008/03/14 16:43:27 tsutsui Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/intr.h>
#include <sys/cpu.h>
#include <uvm/uvm_extern.h>
#include <mips/locore.h>
#include <machine/autoconf.h>
#include <machine/pio.h>
#include <arc/arc/timervar.h>
#include <arc/jazz/pica.h>
#include <arc/jazz/rd94.h>
struct cpu_inttab {
uint32_t int_mask;
uint32_t (*int_hand)(uint32_t, struct clockframe *);
};
static struct cpu_inttab cpu_int_tab[ARC_NINTPRI];
uint32_t cpu_int_mask; /* External cpu interrupt mask */
#ifdef ENABLE_INT5_STATCLOCK
struct evcnt statclock_ev =
EVCNT_INITIALIZER(EVCNT_TYPE_INTR, NULL, "cpu", "statclock");
#endif
/*
* Set up handler for external interrupt events.
* Events are checked in priority order.
*/
void
arc_set_intr(uint32_t mask, uint32_t (*int_hand)(uint32_t, struct clockframe *),
int prio)
{
if (prio >= ARC_NINTPRI)
panic("arc_set_intr: too high priority");
if (cpu_int_tab[prio].int_mask != 0 &&
(cpu_int_tab[prio].int_mask != mask ||
cpu_int_tab[prio].int_hand != int_hand)) {
panic("set_intr: int already set");
}
cpu_int_tab[prio].int_hand = int_hand;
cpu_int_tab[prio].int_mask = mask;
cpu_int_mask |= mask >> 10;
}
/*
* Handle an interrupt.
* N.B., curlwp might be NULL.
*/
void
cpu_intr(uint32_t status, uint32_t cause, uint32_t pc, uint32_t ipending)
{
struct clockframe cf;
struct cpu_inttab *inttab;
struct cpu_info *ci;
uint32_t handled;
u_int i;
handled = 0;
ci = curcpu();
uvmexp.intrs++;
ci->ci_idepth++;
cf.pc = pc;
cf.sr = status;
/* check MIPS3 internal clock interrupt */
if (ipending & MIPS_INT_MASK_5) {
#ifdef ENABLE_INT5_STATCLOCK
/* call statclock(9) handler */
statclockintr(&cf);
statclock_ev.ev_count++;
#else
/*
* Writing a value to the Compare register,
* as a side effect, clears the timer interrupt request.
*/
mips3_cp0_compare_write(0);
#endif
handled |= MIPS_INT_MASK_5;
}
_splset((status & handled) | MIPS_SR_INT_IE);
/*
* If there is an independent timer interrupt handler, call it first.
* Called interrupt routine returns mask of interrupts to be reenabled.
*/
inttab = &cpu_int_tab[ARC_INTPRI_TIMER_INT];
if (inttab->int_mask & ipending) {
handled |= (*inttab->int_hand)(ipending, &cf);
}
_splset((status & handled) | MIPS_SR_INT_IE);
inttab++;
/*
* Check off all other enabled interrupts.
* Called handlers return mask of interrupts to be reenabled.
*/
for (i = ARC_INTPRI_TIMER_INT + 1; i < ARC_NINTPRI; i++) {
if (inttab->int_mask & ipending) {
handled |= (*inttab->int_hand)(ipending, &cf);
}
inttab++;
}
cause &= ~handled;
_splset((status & ~cause & MIPS_HARD_INT_MASK) | MIPS_SR_INT_IE);
ci->ci_idepth--;
#ifdef __HAVE_FAST_SOFTINTS
/* software interrupts */
ipending &= (MIPS_SOFT_INT_MASK_1|MIPS_SOFT_INT_MASK_0);
if (ipending == 0)
return;
_clrsoftintr(ipending);
softintr_dispatch(ipending);
#endif
}