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
powerpc_interrupt(struct trapframe * framep)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 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