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 #include "opt_platform.h" 36 37 #include <sys/cdefs.h> /* RCS ID & Copyright macro defns */ 38 39 #include <sys/param.h> 40 #include <sys/systm.h> 41 #include <sys/bus.h> 42 #include <sys/interrupt.h> 43 #include <sys/kernel.h> 44 #include <sys/kthread.h> 45 #include <sys/ktr.h> 46 #include <sys/lock.h> 47 #include <sys/malloc.h> 48 #include <sys/mutex.h> 49 #ifdef HWPMC_HOOKS 50 #include <sys/pmckern.h> 51 #endif 52 #include <sys/proc.h> 53 #include <sys/smp.h> 54 #include <sys/unistd.h> 55 #include <sys/vmmeter.h> 56 57 #include <machine/cpu.h> 58 #include <machine/clock.h> 59 #include <machine/db_machdep.h> 60 #include <machine/fpu.h> 61 #include <machine/frame.h> 62 #include <machine/intr_machdep.h> 63 #include <machine/md_var.h> 64 #include <machine/pcb.h> 65 #include <machine/psl.h> 66 #include <machine/trap.h> 67 #include <machine/spr.h> 68 #include <machine/sr.h> 69 70 #include "pic_if.h" 71 72 #ifdef POWERNV 73 int (*hmi_handler)(struct trapframe *); 74 #endif 75 76 /* 77 * A very short dispatch, to try and maximise assembler code use 78 * between all exception types. Maybe 'true' interrupts should go 79 * here, and the trap code can come in separately 80 */ 81 void 82 powerpc_interrupt(struct trapframe *framep) 83 { 84 struct thread *td; 85 struct trapframe *oldframe; 86 register_t ee; 87 88 td = curthread; 89 90 CTR2(KTR_INTR, "%s: EXC=%x", __func__, framep->exc); 91 92 switch (framep->exc) { 93 case EXC_EXI: 94 case EXC_HVI: 95 critical_enter(); 96 PIC_DISPATCH(root_pic, framep); 97 critical_exit(); 98 #ifdef BOOKE 99 framep->srr1 &= ~PSL_WE; 100 #endif 101 break; 102 103 case EXC_DECR: 104 critical_enter(); 105 atomic_add_int(&td->td_intr_nesting_level, 1); 106 oldframe = td->td_intr_frame; 107 td->td_intr_frame = framep; 108 decr_intr(framep); 109 td->td_intr_frame = oldframe; 110 atomic_subtract_int(&td->td_intr_nesting_level, 1); 111 critical_exit(); 112 #ifdef BOOKE 113 framep->srr1 &= ~PSL_WE; 114 #endif 115 break; 116 #ifdef HWPMC_HOOKS 117 case EXC_PERF: 118 critical_enter(); 119 KASSERT(pmc_intr != NULL, ("Performance exception, but no handler!")); 120 (*pmc_intr)(framep); 121 if (pmc_hook && (PCPU_GET(curthread)->td_pflags & TDP_CALLCHAIN)) 122 pmc_hook(PCPU_GET(curthread), PMC_FN_USER_CALLCHAIN, framep); 123 critical_exit(); 124 break; 125 #endif 126 127 #ifdef POWERNV 128 case EXC_HMI: 129 if (hmi_handler != 0 && hmi_handler(framep) == 0) 130 break; 131 /* If no handler, or failure to handle, just drop to trap. */ 132 #endif 133 134 default: 135 /* Re-enable interrupts if applicable. */ 136 ee = framep->srr1 & PSL_EE; 137 if (ee != 0) 138 mtmsr(mfmsr() | ee); 139 trap(framep); 140 } 141 } 142