1/*- 2 * Copyright 2002 by Peter Grehan. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 3. The name of the author may not be used to endorse or promote products 13 * derived from this software without specific prior written permission. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 20 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 21 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 22 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 23 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 * 27 * $FreeBSD$ 28 */ 29 30/* 31 * Interrupts are dispatched to here from locore asm 32 */ 33 34#include <sys/cdefs.h> /* RCS ID & Copyright macro defns */ 35 36#include <sys/param.h> 37#include <sys/systm.h> 38#include <sys/bus.h> 39#include <sys/interrupt.h> 40#include <sys/kernel.h> 41#include <sys/kthread.h> 42#include <sys/ktr.h> 43#include <sys/lock.h> 44#include <sys/malloc.h> 45#include <sys/mutex.h> 46#include <sys/proc.h> 47#include <sys/smp.h> 48#include <sys/unistd.h> 49#include <sys/vmmeter.h> 50 51#include <machine/cpu.h> 52#include <machine/clock.h> 53#include <machine/db_machdep.h> 54#include <machine/fpu.h> 55#include <machine/frame.h> 56#include <machine/intr_machdep.h> 57#include <machine/md_var.h> 58#include <machine/pcb.h> 59#include <machine/psl.h> 60#include <machine/trap.h> 61#include <machine/spr.h> 62#include <machine/sr.h> 63 64#include "pic_if.h" 65 66/* 67 * A very short dispatch, to try and maximise assembler code use 68 * between all exception types. Maybe 'true' interrupts should go 69 * here, and the trap code can come in separately 70 */ 71void 72powerpc_interrupt(struct trapframe *framep) 73{ 74 struct thread *td; 75 struct trapframe *oldframe; 76 register_t ee; 77 78 td = curthread; 79 80 CTR2(KTR_INTR, "%s: EXC=%x", __func__, framep->exc); 81 82 switch (framep->exc) { 83 case EXC_EXI: 84 critical_enter(); 85 PIC_DISPATCH(root_pic, framep); 86 critical_exit(); 87 break; 88 89 case EXC_DECR: 90 critical_enter(); 91 atomic_add_int(&td->td_intr_nesting_level, 1); 92 oldframe = td->td_intr_frame; 93 td->td_intr_frame = framep; 94 decr_intr(framep); 95 td->td_intr_frame = oldframe; 96 atomic_subtract_int(&td->td_intr_nesting_level, 1); 97 critical_exit(); 98 break; 99 100 default: 101 /* Re-enable interrupts if applicable. */ 102 ee = framep->srr1 & PSL_EE; 103 if (ee != 0) 104 mtmsr(mfmsr() | ee); 105 trap(framep); 106 } 107} 108