2 * Copyright 2007 John Birrell <jb@FreeBSD.org>
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
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.
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
29 static void enable(cyb_arg_t);
30 static void disable(cyb_arg_t);
31 static void reprogram(cyb_arg_t, hrtime_t);
32 static void xcall(cyb_arg_t, cpu_t *, cyc_func_t, void *);
34 static cyc_backend_t be = {
35 NULL, /* cyb_configure */
36 NULL, /* cyb_unconfigure */
41 NULL /* cyb_arg_t cyb_arg */
45 cyclic_ap_start(void *dummy)
47 /* Initialise the rest of the CPUs. */
51 SYSINIT(cyclic_ap_start, SI_SUB_SMP, SI_ORDER_ANY, cyclic_ap_start, NULL);
54 * Machine dependent cyclic subsystem initialisation.
57 cyclic_machdep_init(void)
59 /* Register the cyclic backend. */
64 cyclic_machdep_uninit(void)
68 for (i = 0; i <= mp_maxid; i++)
69 /* Reset the cyclic clock callback hook. */
70 lapic_cyclic_clock_func[i] = NULL;
72 /* De-register the cyclic backend. */
76 static hrtime_t exp_due[MAXCPU];
79 * This function is the one registered by the machine dependent
80 * initialiser as the callback for high speed timer events.
83 cyclic_clock(struct trapframe *frame)
85 cpu_t *c = &solaris_cpu[curcpu];
87 if (c->cpu_cyclic != NULL && gethrtime() >= exp_due[curcpu]) {
88 if (TRAPF_USERMODE(frame)) {
89 c->cpu_profile_pc = 0;
90 c->cpu_profile_upc = TRAPF_PC(frame);
92 c->cpu_profile_pc = TRAPF_PC(frame);
93 c->cpu_profile_upc = 0;
98 /* Fire any timers that are due. */
101 c->cpu_intr_actv = 0;
105 static void enable(cyb_arg_t arg)
107 /* Register the cyclic clock callback function. */
108 lapic_cyclic_clock_func[curcpu] = cyclic_clock;
111 static void disable(cyb_arg_t arg)
113 /* Reset the cyclic clock callback function. */
114 lapic_cyclic_clock_func[curcpu] = NULL;
117 static void reprogram(cyb_arg_t arg, hrtime_t exp)
119 exp_due[curcpu] = exp;
122 static void xcall(cyb_arg_t arg, cpu_t *c, cyc_func_t func, void *param)
125 * If the target CPU is the current one, just call the
126 * function. This covers the non-SMP case.
128 if (c == &solaris_cpu[curcpu])
131 smp_rendezvous_cpus((cpumask_t) (1 << c->cpuid), NULL,
132 func, smp_no_rendevous_barrier, param);