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34559125 LC |
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 | ||
33 | timer_tick_rate_t timer_get_tick_rate(void) | |
34 | { | |
35 | return tmrHw_getCountRate(PROF_TIMER); | |
36 | } | |
37 | ||
38 | timer_tick_count_t timer_get_tick_count(void) | |
39 | { | |
40 | return tmrHw_GetCurrentCount(PROF_TIMER); /* change downcounter to upcounter */ | |
41 | } | |
42 | ||
43 | timer_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 | ||
54 | timer_msec_t timer_get_msec(void) | |
55 | { | |
56 | return timer_ticks_to_msec(timer_get_tick_count()); | |
57 | } | |
58 | ||
59 | EXPORT_SYMBOL(timer_get_tick_count); | |
60 | EXPORT_SYMBOL(timer_ticks_to_msec); | |
61 | EXPORT_SYMBOL(timer_get_tick_rate); | |
62 | EXPORT_SYMBOL(timer_get_msec); |