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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2008 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/*
* tod driver module for Starfire
* This module implements a soft tod since
* starfire has no tod part.
*/
#include <sys/types.h>
#include <sys/param.h>
#include <sys/sysmacros.h>
#include <sys/systm.h>
#include <sys/errno.h>
#include <sys/modctl.h>
#include <sys/autoconf.h>
#include <sys/debug.h>
#include <sys/clock.h>
#include <sys/cmn_err.h>
#include <sys/promif.h>
#include <sys/cpuvar.h>
#include <sys/cpu_sgnblk_defs.h>
#include <starfire/sys/cpu_sgn.h>
static timestruc_t todsf_get(void);
static void todsf_set(timestruc_t);
static uint_t todsf_set_watchdog_timer(uint_t);
static uint_t todsf_clear_watchdog_timer(void);
static void todsf_set_power_alarm(timestruc_t);
static void todsf_clear_power_alarm(void);
static uint64_t todsf_get_cpufrequency(void);
/*
* Module linkage information for the kernel.
*/
static struct modlmisc modlmisc = {
&mod_miscops, "Soft tod module for Starfire"
};
static struct modlinkage modlinkage = {
MODREV_1, (void *)&modlmisc, NULL
};
int
_init(void)
{
if (strcmp(tod_module_name, "todstarfire") == 0) {
int ssp_time32;
char obp_string[40];
/* Set the string to pass to OBP */
(void) sprintf(obp_string, "h# %p unix-gettod",
(void *)&ssp_time32);
/* Get OBP to get TOD from ssp */
prom_interpret(obp_string, 0, 0, 0, 0, 0);
hrestime.tv_sec = (time_t)ssp_time32;
tod_ops.tod_get = todsf_get;
tod_ops.tod_set = todsf_set;
tod_ops.tod_set_watchdog_timer = todsf_set_watchdog_timer;
tod_ops.tod_clear_watchdog_timer = todsf_clear_watchdog_timer;
tod_ops.tod_set_power_alarm = todsf_set_power_alarm;
tod_ops.tod_clear_power_alarm = todsf_clear_power_alarm;
tod_ops.tod_get_cpufrequency = todsf_get_cpufrequency;
/*
* Flag warning if user tried to use hardware watchdog
*/
if (watchdog_enable) {
cmn_err(CE_WARN, "Hardware watchdog unavailable");
}
}
return (mod_install(&modlinkage));
}
int
_fini(void)
{
if (strcmp(tod_module_name, "todstarfire") == 0)
return (EBUSY);
else
return (mod_remove(&modlinkage));
}
int
_info(struct modinfo *modinfop)
{
return (mod_info(&modlinkage, modinfop));
}
/*
* Simply return hrestime value
* Must be called with tod_lock held.
*/
static timestruc_t
todsf_get(void)
{
timestruc_t ts;
extern cpu_sgnblk_t *cpu_sgnblkp[];
ASSERT(MUTEX_HELD(&tod_lock));
ts = hrestime;
/* Update the heartbeat */
if (cpu_sgnblkp[CPU->cpu_id] != NULL)
cpu_sgnblkp[CPU->cpu_id]->sigb_heartbeat++;
return (ts);
}
/*
* Null function for now.
* Must be called with tod_lock held.
*/
/* ARGSUSED */
static void
todsf_set(timestruc_t ts)
{
ASSERT(MUTEX_HELD(&tod_lock));
}
/*
* No watchdog function.
*/
/* ARGSUSED */
static uint_t
todsf_set_watchdog_timer(uint_t timeoutval)
{
ASSERT(MUTEX_HELD(&tod_lock));
return (0);
}
/*
* No watchdog function
*/
static uint_t
todsf_clear_watchdog_timer(void)
{
ASSERT(MUTEX_HELD(&tod_lock));
return (0);
}
/*
* Null function.
*/
/* ARGSUSED */
static void
todsf_set_power_alarm(timestruc_t ts)
{
ASSERT(MUTEX_HELD(&tod_lock));
}
/*
* Null function
*/
static void
todsf_clear_power_alarm()
{
ASSERT(MUTEX_HELD(&tod_lock));
}
/*
* Get clock freq from the cpunode
*/
uint64_t
todsf_get_cpufrequency(void)
{
return (cpunodes[CPU->cpu_id].clock_freq);
}
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