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 28 /* 29 * Interrupts are dispatched to here from locore asm 30 */ 31 32 #include "opt_hwpmc_hooks.h" 33 #include "opt_platform.h" 34 35 #include <sys/cdefs.h> /* RCS ID & Copyright macro defns */ 36 37 #include <sys/param.h> 38 #include <sys/systm.h> 39 #include <sys/bus.h> 40 #include <sys/interrupt.h> 41 #include <sys/kernel.h> 42 #include <sys/kthread.h> 43 #include <sys/ktr.h> 44 #include <sys/lock.h> 45 #include <sys/malloc.h> 46 #include <sys/mutex.h> 47 #ifdef HWPMC_HOOKS 48 #include <sys/pmckern.h> 49 #endif 50 #include <sys/proc.h> 51 #include <sys/smp.h> 52 #include <sys/unistd.h> 53 #include <sys/vmmeter.h> 54 55 #include <machine/cpu.h> 56 #include <machine/clock.h> 57 #include <machine/db_machdep.h> 58 #include <machine/fpu.h> 59 #include <machine/frame.h> 60 #include <machine/intr_machdep.h> 61 #include <machine/md_var.h> 62 #include <machine/pcb.h> 63 #include <machine/psl.h> 64 #include <machine/trap.h> 65 #include <machine/spr.h> 66 #include <machine/sr.h> 67 68 #include "pic_if.h" 69 70 #ifdef POWERNV 71 int (*hmi_handler)(struct trapframe *); 72 #endif 73 74 /* 75 * A very short dispatch, to try and maximise assembler code use 76 * between all exception types. Maybe 'true' interrupts should go 77 * here, and the trap code can come in separately 78 */ 79 void 80 powerpc_interrupt(struct trapframe *framep) 81 { 82 struct thread *td; 83 struct trapframe *oldframe; 84 register_t ee; 85 86 td = curthread; 87 88 CTR2(KTR_INTR, "%s: EXC=%x", __func__, framep->exc); 89 90 switch (framep->exc) { 91 case EXC_EXI: 92 case EXC_HVI: 93 critical_enter(); 94 PIC_DISPATCH(root_pic, framep); 95 critical_exit(); 96 #ifdef BOOKE 97 framep->srr1 &= ~PSL_WE; 98 #endif 99 break; 100 101 case EXC_DECR: 102 critical_enter(); 103 atomic_add_int(&td->td_intr_nesting_level, 1); 104 oldframe = td->td_intr_frame; 105 td->td_intr_frame = framep; 106 decr_intr(framep); 107 td->td_intr_frame = oldframe; 108 atomic_subtract_int(&td->td_intr_nesting_level, 1); 109 critical_exit(); 110 #ifdef BOOKE 111 framep->srr1 &= ~PSL_WE; 112 #endif 113 break; 114 #ifdef HWPMC_HOOKS 115 case EXC_PERF: 116 critical_enter(); 117 KASSERT(pmc_intr != NULL, ("Performance exception, but no handler!")); 118 (*pmc_intr)(framep); 119 critical_exit(); 120 if (pmc_hook && (PCPU_GET(curthread)->td_pflags & TDP_CALLCHAIN)) 121 pmc_hook(PCPU_GET(curthread), PMC_FN_USER_CALLCHAIN, framep); 122 break; 123 #endif 124 125 #ifdef POWERNV 126 case EXC_HMI: 127 if (hmi_handler != 0 && hmi_handler(framep) == 0) 128 break; 129 /* If no handler, or failure to handle, just drop to trap. */ 130 #endif 131 132 default: 133 /* Re-enable interrupts if applicable. */ 134 ee = framep->srr1 & PSL_EE; 135 if (ee != 0) 136 mtmsr(mfmsr() | ee); 137 trap(framep); 138 } 139 } 140