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 "opt_hwpmc_hooks.h" 35 36#include <sys/cdefs.h> /* RCS ID & Copyright macro defns */ 37 38#include <sys/param.h> 39#include <sys/systm.h> 40#include <sys/bus.h> 41#include <sys/interrupt.h> 42#include <sys/kernel.h> 43#include <sys/kthread.h> 44#include <sys/ktr.h> 45#include <sys/lock.h> 46#include <sys/malloc.h> 47#include <sys/mutex.h> 48#ifdef HWPMC_HOOKS 49#include <sys/pmckern.h> 50#endif 51#include <sys/proc.h> 52#include <sys/smp.h> 53#include <sys/unistd.h> 54#include <sys/vmmeter.h> 55 56#include <machine/cpu.h> 57#include <machine/clock.h> 58#include <machine/db_machdep.h> 59#include <machine/fpu.h> 60#include <machine/frame.h> 61#include <machine/intr_machdep.h> 62#include <machine/md_var.h> 63#include <machine/pcb.h> 64#include <machine/psl.h> 65#include <machine/trap.h> 66#include <machine/spr.h> 67#include <machine/sr.h> 68 69#include "pic_if.h" 70 71/* 72 * A very short dispatch, to try and maximise assembler code use 73 * between all exception types. Maybe 'true' interrupts should go 74 * here, and the trap code can come in separately 75 */ 76void 77powerpc_interrupt(struct trapframe *framep) 78{ 79 struct thread *td; 80 struct trapframe *oldframe; 81 register_t ee; 82 83 td = curthread; 84 85 CTR2(KTR_INTR, "%s: EXC=%x", __func__, framep->exc); 86 87 switch (framep->exc) { 88 case EXC_EXI: 89 critical_enter(); 90 PIC_DISPATCH(root_pic, framep); 91 critical_exit(); 92 break; 93 94 case EXC_DECR: 95 critical_enter(); 96 atomic_add_int(&td->td_intr_nesting_level, 1); 97 oldframe = td->td_intr_frame; 98 td->td_intr_frame = framep; 99 decr_intr(framep); 100 td->td_intr_frame = oldframe; 101 atomic_subtract_int(&td->td_intr_nesting_level, 1); 102 critical_exit(); 103 break; 104#ifdef HWPMC_HOOKS 105 case EXC_PERF: 106 critical_enter(); 107 KASSERT(pmc_intr != NULL, ("Performance exception, but no handler!")); 108 (*pmc_intr)(PCPU_GET(cpuid), framep); 109 if (pmc_hook && (PCPU_GET(curthread)->td_pflags & TDP_CALLCHAIN)) 110 pmc_hook(PCPU_GET(curthread), PMC_FN_USER_CALLCHAIN, framep); 111 critical_exit(); 112 break; 113#endif 114 115 default: 116 /* Re-enable interrupts if applicable. */ 117 ee = framep->srr1 & PSL_EE; 118 if (ee != 0) 119 mtmsr(mfmsr() | ee); 120 trap(framep); 121 } 122} 123