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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
Richard Cochran74d23cc2014-12-21 19:46:56 +010019#include <linux/timecounter.h>
Mark Rutland8a4da6e2012-11-12 14:33:44 +000020#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
Marc Zyngier1431af32015-10-19 16:32:20 +010026#define CNTHCTL_EL1PCTEN (1 << 0)
27#define CNTHCTL_EL1PCEN (1 << 1)
28#define CNTHCTL_EVNTEN (1 << 2)
29#define CNTHCTL_EVNTDIR (1 << 3)
30#define CNTHCTL_EVNTI (0xF << 4)
31
Stephen Boyde09f3cc2013-07-18 16:59:28 -070032enum arch_timer_reg {
33 ARCH_TIMER_REG_CTRL,
34 ARCH_TIMER_REG_TVAL,
35};
Mark Rutland8a4da6e2012-11-12 14:33:44 +000036
37#define ARCH_TIMER_PHYS_ACCESS 0
38#define ARCH_TIMER_VIRT_ACCESS 1
Stephen Boyd22006992013-07-18 16:59:32 -070039#define ARCH_TIMER_MEM_PHYS_ACCESS 2
40#define ARCH_TIMER_MEM_VIRT_ACCESS 3
Mark Rutland8a4da6e2012-11-12 14:33:44 +000041
Sudeep KarkadaNagesha28061752013-08-13 13:43:26 +010042#define ARCH_TIMER_USR_PCT_ACCESS_EN (1 << 0) /* physical counter */
43#define ARCH_TIMER_USR_VCT_ACCESS_EN (1 << 1) /* virtual counter */
44#define ARCH_TIMER_VIRT_EVT_EN (1 << 2)
45#define ARCH_TIMER_EVT_TRIGGER_SHIFT (4)
46#define ARCH_TIMER_EVT_TRIGGER_MASK (0xF << ARCH_TIMER_EVT_TRIGGER_SHIFT)
47#define ARCH_TIMER_USR_VT_ACCESS_EN (1 << 8) /* virtual timer registers */
48#define ARCH_TIMER_USR_PT_ACCESS_EN (1 << 9) /* physical timer registers */
49
Will Deacon037f6372013-08-23 15:32:29 +010050#define ARCH_TIMER_EVT_STREAM_FREQ 10000 /* 100us */
51
Mark Rutland8a4da6e2012-11-12 14:33:44 +000052#ifdef CONFIG_ARM_ARCH_TIMER
53
Mark Rutland8a4da6e2012-11-12 14:33:44 +000054extern u32 arch_timer_get_rate(void);
Stephen Boyd22006992013-07-18 16:59:32 -070055extern u64 (*arch_timer_read_counter)(void);
Mark Rutland8a4da6e2012-11-12 14:33:44 +000056extern struct timecounter *arch_timer_get_timecounter(void);
57
58#else
59
Mark Rutland8a4da6e2012-11-12 14:33:44 +000060static inline u32 arch_timer_get_rate(void)
61{
62 return 0;
63}
64
65static inline u64 arch_timer_read_counter(void)
66{
67 return 0;
68}
69
Olof Johansson0582b052013-02-11 15:15:53 -080070static inline struct timecounter *arch_timer_get_timecounter(void)
Mark Rutland8a4da6e2012-11-12 14:33:44 +000071{
72 return NULL;
73}
74
75#endif
76
77#endif