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 */ 76 void 77 powerpc_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 case EXC_HVI: 90 critical_enter(); 91 PIC_DISPATCH(root_pic, framep); 92 critical_exit(); 93 #ifdef BOOKE 94 framep->srr1 &= ~PSL_WE; 95 #endif 96 break; 97 98 case EXC_DECR: 99 critical_enter(); 100 atomic_add_int(&td->td_intr_nesting_level, 1); 101 oldframe = td->td_intr_frame; 102 td->td_intr_frame = framep; 103 decr_intr(framep); 104 td->td_intr_frame = oldframe; 105 atomic_subtract_int(&td->td_intr_nesting_level, 1); 106 critical_exit(); 107 #ifdef BOOKE 108 framep->srr1 &= ~PSL_WE; 109 #endif 110 break; 111 #ifdef HWPMC_HOOKS 112 case EXC_PERF: 113 critical_enter(); 114 KASSERT(pmc_intr != NULL, ("Performance exception, but no handler!")); 115 (*pmc_intr)(framep); 116 if (pmc_hook && (PCPU_GET(curthread)->td_pflags & TDP_CALLCHAIN)) 117 pmc_hook(PCPU_GET(curthread), PMC_FN_USER_CALLCHAIN, framep); 118 critical_exit(); 119 break; 120 #endif 121 122 default: 123 /* Re-enable interrupts if applicable. */ 124 ee = framep->srr1 & PSL_EE; 125 if (ee != 0) 126 mtmsr(mfmsr() | ee); 127 trap(framep); 128 } 129 } 130