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118 lines
3.4 KiB
C
118 lines
3.4 KiB
C
/*
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* Copyright 2002 by Peter Grehan. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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/*
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* Interrupts are dispatched to here from locore asm
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*/
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#include <sys/cdefs.h> /* RCS ID & Copyright macro defns */
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/bus.h>
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#include <sys/interrupt.h>
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#include <sys/kernel.h>
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#include <sys/kthread.h>
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#include <sys/ktr.h>
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#include <sys/lock.h>
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#include <sys/malloc.h>
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#include <sys/mutex.h>
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#include <sys/proc.h>
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#include <sys/smp.h>
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#include <sys/unistd.h>
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#include <sys/vmmeter.h>
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#include <machine/cpu.h>
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#include <machine/db_machdep.h>
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#include <machine/fpu.h>
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#include <machine/frame.h>
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#include <machine/pcb.h>
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#include <machine/psl.h>
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#include <machine/trap.h>
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#include <machine/spr.h>
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#include <machine/sr.h>
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#include <machine/interruptvar.h>
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void powerpc_interrupt(struct trapframe *);
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/*
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* External interrupt install routines
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*/
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static void (*powerpc_extintr_handler)(void);
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void
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ext_intr_install(void (*new_extint)(void))
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{
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powerpc_extintr_handler = new_extint;
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}
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extern void decr_intr(struct clockframe *);
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extern void trap(struct trapframe *);
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/*
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* A very short dispatch, to try and maximise assembler code use
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* between all exception types. Maybe 'true' interrupts should go
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* here, and the trap code can come in separately
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*/
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void
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powerpc_interrupt(struct trapframe *framep)
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{
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struct thread *td;
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struct clockframe ckframe;
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td = curthread;
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switch (framep->exc) {
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case EXC_EXI:
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atomic_add_int(&td->td_intr_nesting_level, 1);
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(*powerpc_extintr_handler)();
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atomic_subtract_int(&td->td_intr_nesting_level, 1);
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break;
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case EXC_DECR:
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atomic_add_int(&td->td_intr_nesting_level, 1);
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ckframe.srr0 = framep->srr0;
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ckframe.srr1 = framep->srr1;
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decr_intr(&ckframe);
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atomic_subtract_int(&td->td_intr_nesting_level, 1);
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break;
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default:
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/*
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* Re-enable interrupts and call the generic trap code
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*/
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#if 0
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printf("powerpc_interrupt: got trap\n");
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#endif
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mtmsr(mfmsr() | PSL_EE);
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isync();
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trap(framep);
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}
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}
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