1/***************************************************************************** 2* Copyright 2003 - 2008 Broadcom Corporation. All rights reserved. 3* 4* Unless you and Broadcom execute a separate written software license 5* agreement governing use of this software, this software is licensed to you 6* under the terms of the GNU General Public License version 2, available at 7* http://www.broadcom.com/licenses/GPLv2.php (the "GPL"). 8* 9* Notwithstanding the above, under no circumstances may you combine this 10* software in any way with any other Broadcom software provided under a 11* license other than the GPL, without Broadcom's express prior written 12* consent. 13*****************************************************************************/ 14 15#include <linux/version.h> 16#include <linux/types.h> 17#include <linux/module.h> 18#include <csp/tmrHw.h> 19 20#include <mach/timer.h> 21/* The core.c file initializes timers 1 and 3 as a linux clocksource. */ 22/* The real time clock should probably be the real linux clocksource. */ 23/* In the meantime, this file should agree with core.c as to the */ 24/* profiling timer. If the clocksource is moved to rtc later, then */ 25/* we can init the profiling timer here instead. */ 26 27/* Timer 1 provides 25MHz resolution syncrhonized to scheduling and APM timing */ 28/* Timer 3 provides bus freqeuncy sychronized to ACLK, but spread spectrum will */ 29/* affect synchronization with scheduling and APM timing. */ 30 31#define PROF_TIMER 1 32 33timer_tick_rate_t timer_get_tick_rate(void) 34{ 35 return tmrHw_getCountRate(PROF_TIMER); 36} 37 38timer_tick_count_t timer_get_tick_count(void) 39{ 40 return tmrHw_GetCurrentCount(PROF_TIMER); /* change downcounter to upcounter */ 41} 42 43timer_msec_t timer_ticks_to_msec(timer_tick_count_t ticks) 44{ 45 static int tickRateMsec; 46 47 if (tickRateMsec == 0) { 48 tickRateMsec = timer_get_tick_rate() / 1000; 49 } 50 51 return ticks / tickRateMsec; 52} 53 54timer_msec_t timer_get_msec(void) 55{ 56 return timer_ticks_to_msec(timer_get_tick_count()); 57} 58 59EXPORT_SYMBOL(timer_get_tick_count); 60EXPORT_SYMBOL(timer_ticks_to_msec); 61EXPORT_SYMBOL(timer_get_tick_rate); 62EXPORT_SYMBOL(timer_get_msec); 63