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/*-
* Copyright 2002 by Peter Grehan. 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. The name of the author may not 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 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.
*
* $FreeBSD$
*/
/*
* Interrupts are dispatched to here from locore asm
*/
#include <sys/cdefs.h> /* RCS ID & Copyright macro defns */
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bus.h>
#include <sys/interrupt.h>
#include <sys/kernel.h>
#include <sys/kthread.h>
#include <sys/ktr.h>
#include <sys/lock.h>
#include <sys/malloc.h>
#include <sys/mutex.h>
#include <sys/proc.h>
#include <sys/smp.h>
#include <sys/unistd.h>
#include <sys/vmmeter.h>
#include <machine/cpu.h>
#include <machine/db_machdep.h>
#include <machine/fpu.h>
#include <machine/frame.h>
#include <machine/pcb.h>
#include <machine/psl.h>
#include <machine/trap.h>
#include <machine/spr.h>
#include <machine/sr.h>
#include <machine/interruptvar.h>
void powerpc_interrupt(struct trapframe *);
/*
* External interrupt install routines
*/
static void (*powerpc_extintr_handler)(void);
void
ext_intr_install(void (*new_extint)(void))
{
powerpc_extintr_handler = new_extint;
}
extern void decr_intr(struct clockframe *);
extern void trap(struct trapframe *);
/*
* A very short dispatch, to try and maximise assembler code use
* between all exception types. Maybe 'true' interrupts should go
* here, and the trap code can come in separately
*/
void
powerpc_interrupt(struct trapframe *framep)
{
struct thread *td;
struct clockframe ckframe;
td = curthread;
switch (framep->exc) {
case EXC_EXI:
atomic_add_int(&td->td_intr_nesting_level, 1);
(*powerpc_extintr_handler)();
atomic_subtract_int(&td->td_intr_nesting_level, 1);
break;
case EXC_DECR:
atomic_add_int(&td->td_intr_nesting_level, 1);
ckframe.srr0 = framep->srr0;
ckframe.srr1 = framep->srr1;
decr_intr(&ckframe);
atomic_subtract_int(&td->td_intr_nesting_level, 1);
break;
default:
/*
* Re-enable interrupts and call the generic trap code
*/
#if 0
printf("powerpc_interrupt: got trap\n");
mtmsr(mfmsr() | PSL_EE);
isync();
#endif
trap(framep);
}
}
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