mirror of https://gitee.com/openkylin/linux.git
62 lines
2.0 KiB
C
62 lines
2.0 KiB
C
/*****************************************************************************
|
|
* Copyright 2003 - 2008 Broadcom Corporation. All rights reserved.
|
|
*
|
|
* Unless you and Broadcom execute a separate written software license
|
|
* agreement governing use of this software, this software is licensed to you
|
|
* under the terms of the GNU General Public License version 2, available at
|
|
* http://www.broadcom.com/licenses/GPLv2.php (the "GPL").
|
|
*
|
|
* Notwithstanding the above, under no circumstances may you combine this
|
|
* software in any way with any other Broadcom software provided under a
|
|
* license other than the GPL, without Broadcom's express prior written
|
|
* consent.
|
|
*****************************************************************************/
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/module.h>
|
|
#include <csp/tmrHw.h>
|
|
|
|
#include <mach/timer.h>
|
|
/* The core.c file initializes timers 1 and 3 as a linux clocksource. */
|
|
/* The real time clock should probably be the real linux clocksource. */
|
|
/* In the meantime, this file should agree with core.c as to the */
|
|
/* profiling timer. If the clocksource is moved to rtc later, then */
|
|
/* we can init the profiling timer here instead. */
|
|
|
|
/* Timer 1 provides 25MHz resolution syncrhonized to scheduling and APM timing */
|
|
/* Timer 3 provides bus freqeuncy sychronized to ACLK, but spread spectrum will */
|
|
/* affect synchronization with scheduling and APM timing. */
|
|
|
|
#define PROF_TIMER 1
|
|
|
|
timer_tick_rate_t timer_get_tick_rate(void)
|
|
{
|
|
return tmrHw_getCountRate(PROF_TIMER);
|
|
}
|
|
|
|
timer_tick_count_t timer_get_tick_count(void)
|
|
{
|
|
return tmrHw_GetCurrentCount(PROF_TIMER); /* change downcounter to upcounter */
|
|
}
|
|
|
|
timer_msec_t timer_ticks_to_msec(timer_tick_count_t ticks)
|
|
{
|
|
static int tickRateMsec;
|
|
|
|
if (tickRateMsec == 0) {
|
|
tickRateMsec = timer_get_tick_rate() / 1000;
|
|
}
|
|
|
|
return ticks / tickRateMsec;
|
|
}
|
|
|
|
timer_msec_t timer_get_msec(void)
|
|
{
|
|
return timer_ticks_to_msec(timer_get_tick_count());
|
|
}
|
|
|
|
EXPORT_SYMBOL(timer_get_tick_count);
|
|
EXPORT_SYMBOL(timer_ticks_to_msec);
|
|
EXPORT_SYMBOL(timer_get_tick_rate);
|
|
EXPORT_SYMBOL(timer_get_msec);
|