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Mark Rutland8a4da6e2012-11-12 14:33:44 +00001/*
2 * Copyright (C) 2012 ARM Ltd.
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation.
7 *
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
12 *
13 * You should have received a copy of the GNU General Public License
14 * along with this program. If not, see <http://www.gnu.org/licenses/>.
15 */
16#ifndef __CLKSOURCE_ARM_ARCH_TIMER_H
17#define __CLKSOURCE_ARM_ARCH_TIMER_H
18
19#include <linux/clocksource.h>
20#include <linux/types.h>
21
22#define ARCH_TIMER_CTRL_ENABLE (1 << 0)
23#define ARCH_TIMER_CTRL_IT_MASK (1 << 1)
24#define ARCH_TIMER_CTRL_IT_STAT (1 << 2)
25
26#define ARCH_TIMER_REG_CTRL 0
27#define ARCH_TIMER_REG_TVAL 1
28
29#define ARCH_TIMER_PHYS_ACCESS 0
30#define ARCH_TIMER_VIRT_ACCESS 1
31
Sudeep KarkadaNageshac0a8e8a2013-08-13 13:43:26 +010032#define ARCH_TIMER_USR_PCT_ACCESS_EN (1 << 0) /* physical counter */
33#define ARCH_TIMER_USR_VCT_ACCESS_EN (1 << 1) /* virtual counter */
34#define ARCH_TIMER_VIRT_EVT_EN (1 << 2)
35#define ARCH_TIMER_EVT_TRIGGER_SHIFT (4)
36#define ARCH_TIMER_EVT_TRIGGER_MASK (0xF << ARCH_TIMER_EVT_TRIGGER_SHIFT)
37#define ARCH_TIMER_USR_VT_ACCESS_EN (1 << 8) /* virtual timer registers */
38#define ARCH_TIMER_USR_PT_ACCESS_EN (1 << 9) /* physical timer registers */
39
Will Deacon8c06dc72013-08-23 15:32:29 +010040#define ARCH_TIMER_EVT_STREAM_FREQ 10000 /* 100us */
41
Mark Rutland8a4da6e2012-11-12 14:33:44 +000042#ifdef CONFIG_ARM_ARCH_TIMER
43
Mark Rutland8a4da6e2012-11-12 14:33:44 +000044extern u32 arch_timer_get_rate(void);
Mark Rutland714c21c2013-01-30 17:51:26 +000045extern u64 arch_timer_read_counter(void);
Mark Rutland8a4da6e2012-11-12 14:33:44 +000046extern struct timecounter *arch_timer_get_timecounter(void);
47
48#else
49
Mark Rutland8a4da6e2012-11-12 14:33:44 +000050static inline u32 arch_timer_get_rate(void)
51{
52 return 0;
53}
54
55static inline u64 arch_timer_read_counter(void)
56{
57 return 0;
58}
59
Olof Johansson0582b052013-02-11 15:15:53 -080060static inline struct timecounter *arch_timer_get_timecounter(void)
Mark Rutland8a4da6e2012-11-12 14:33:44 +000061{
62 return NULL;
63}
64
65#endif
66
67#endif