1/*-
2 * Copyright 2006-2008 John Birrell <jb@FreeBSD.org>
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 *
13 * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
16 * ARE DISCLAIMED.  IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
23 * SUCH DAMAGE.
24 *
25 * $FreeBSD$
26 *
27 */
28
29static void enable(cyb_arg_t);
30static void disable(cyb_arg_t);
31static void reprogram(cyb_arg_t, hrtime_t);
32static void xcall(cyb_arg_t, cpu_t *, cyc_func_t, void *);
33static void cyclic_clock(struct trapframe *frame);
34
35static cyc_backend_t	be	= {
36	NULL,		/* cyb_configure */
37	NULL,		/* cyb_unconfigure */
38	enable,
39	disable,
40	reprogram,
41	xcall,
42	NULL		/* cyb_arg_t cyb_arg */
43};
44
45static void
46cyclic_ap_start(void *dummy)
47{
48	/* Initialise the rest of the CPUs. */
49	cyclic_clock_func = cyclic_clock;
50	cyclic_mp_init();
51}
52
53SYSINIT(cyclic_ap_start, SI_SUB_SMP, SI_ORDER_ANY, cyclic_ap_start, NULL);
54
55/*
56 *  Machine dependent cyclic subsystem initialisation.
57 */
58static void
59cyclic_machdep_init(void)
60{
61	/* Register the cyclic backend. */
62	cyclic_init(&be);
63}
64
65static void
66cyclic_machdep_uninit(void)
67{
68	/* De-register the cyclic backend. */
69	cyclic_uninit();
70}
71
72/*
73 * This function is the one registered by the machine dependent
74 * initialiser as the callback for high speed timer events.
75 */
76static void
77cyclic_clock(struct trapframe *frame)
78{
79	cpu_t *c = &solaris_cpu[curcpu];
80
81	if (c->cpu_cyclic != NULL) {
82		if (TRAPF_USERMODE(frame)) {
83			c->cpu_profile_pc = 0;
84			c->cpu_profile_upc = TRAPF_PC(frame);
85		} else {
86			c->cpu_profile_pc = TRAPF_PC(frame);
87			c->cpu_profile_upc = 0;
88		}
89
90		c->cpu_intr_actv = 1;
91
92		/* Fire any timers that are due. */
93		cyclic_fire(c);
94
95		c->cpu_intr_actv = 0;
96	}
97}
98
99static void
100enable(cyb_arg_t arg __unused)
101{
102
103}
104
105static void
106disable(cyb_arg_t arg __unused)
107{
108
109}
110
111static void
112reprogram(cyb_arg_t arg __unused, hrtime_t exp)
113{
114	struct bintime bt;
115	struct timespec ts;
116
117	ts.tv_sec = exp / 1000000000;
118	ts.tv_nsec = exp % 1000000000;
119	timespec2bintime(&ts, &bt);
120	clocksource_cyc_set(&bt);
121}
122
123static void xcall(cyb_arg_t arg __unused, cpu_t *c, cyc_func_t func,
124    void *param)
125{
126	cpuset_t cpus;
127
128	CPU_SETOF(c->cpuid, &cpus);
129	smp_rendezvous_cpus(cpus,
130	    smp_no_rendevous_barrier, func, smp_no_rendevous_barrier, param);
131}
132