124 lines
3.4 KiB
C
124 lines
3.4 KiB
C
|
/*
|
||
|
|
* 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 *);
|
||
|
|
|
||
|
|
u_long intrcnt[1];
|
||
|
|
u_long eintrcnt[1];
|
||
|
|
|
||
|
|
char intrnames[1];
|
||
|
|
char eintrnames[1];
|
||
|
|
|
||
|
|
/*
|
||
|
|
* 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");
|
||
|
|
#endif
|
||
|
|
mtmsr(mfmsr() | PSL_EE);
|
||
|
|
isync();
|
||
|
|
trap(framep);
|
||
|
|
}
|
||
|
|
}
|