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/*-
* Copyright 2006-2008 John Birrell <jb@FreeBSD.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*
*/
static void enable(cyb_arg_t);
static void disable(cyb_arg_t);
static void reprogram(cyb_arg_t, hrtime_t);
static void xcall(cyb_arg_t, cpu_t *, cyc_func_t, void *);
static cyc_backend_t be = {
NULL, /* cyb_configure */
NULL, /* cyb_unconfigure */
enable,
disable,
reprogram,
xcall,
NULL /* cyb_arg_t cyb_arg */
};
static void
cyclic_ap_start(void *dummy)
{
/* Initialise the rest of the CPUs. */
cyclic_mp_init();
}
SYSINIT(cyclic_ap_start, SI_SUB_SMP, SI_ORDER_ANY, cyclic_ap_start, NULL);
/*
* Machine dependent cyclic subsystem initialisation.
*/
static void
cyclic_machdep_init(void)
{
/* Register the cyclic backend. */
cyclic_init(&be);
}
static void
cyclic_machdep_uninit(void)
{
int i;
for (i = 0; i <= mp_maxid; i++)
/* Reset the cyclic clock callback hook. */
cyclic_clock_func[i] = NULL;
/* De-register the cyclic backend. */
cyclic_uninit();
}
static hrtime_t exp_due[MAXCPU];
/*
* This function is the one registered by the machine dependent
* initialiser as the callback for high speed timer events.
*/
static void
cyclic_clock(struct trapframe *frame)
{
cpu_t *c = &solaris_cpu[curcpu];
if (c->cpu_cyclic != NULL && gethrtime() >= exp_due[curcpu]) {
if (TRAPF_USERMODE(frame)) {
c->cpu_profile_pc = 0;
c->cpu_profile_upc = TRAPF_PC(frame);
} else {
c->cpu_profile_pc = TRAPF_PC(frame);
c->cpu_profile_upc = 0;
}
c->cpu_intr_actv = 1;
/* Fire any timers that are due. */
cyclic_fire(c);
c->cpu_intr_actv = 0;
}
}
static void enable(cyb_arg_t arg)
{
/* Register the cyclic clock callback function. */
cyclic_clock_func[curcpu] = cyclic_clock;
}
static void disable(cyb_arg_t arg)
{
/* Reset the cyclic clock callback function. */
cyclic_clock_func[curcpu] = NULL;
}
static void reprogram(cyb_arg_t arg, hrtime_t exp)
{
exp_due[curcpu] = exp;
}
static void xcall(cyb_arg_t arg, cpu_t *c, cyc_func_t func, void *param)
{
smp_rendezvous_cpus((cpumask_t) (1 << c->cpuid),
smp_no_rendevous_barrier, func, smp_no_rendevous_barrier, param);
}
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