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