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