blob: 6d26b40cbf5d29c7d80c83a9fe22b4f9e85a0b70 [file] [log] [blame]
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
Stephen Boyde09f3cc2013-07-18 16:59:28 -070026enum arch_timer_reg {
27 ARCH_TIMER_REG_CTRL,
28 ARCH_TIMER_REG_TVAL,
29};
Mark Rutland8a4da6e2012-11-12 14:33:44 +000030
31#define ARCH_TIMER_PHYS_ACCESS 0
32#define ARCH_TIMER_VIRT_ACCESS 1
Stephen Boyd22006992013-07-18 16:59:32 -070033#define ARCH_TIMER_MEM_PHYS_ACCESS 2
34#define ARCH_TIMER_MEM_VIRT_ACCESS 3
Mark Rutland8a4da6e2012-11-12 14:33:44 +000035
Sudeep KarkadaNagesha28061752013-08-13 13:43:26 +010036#define ARCH_TIMER_USR_PCT_ACCESS_EN (1 << 0) /* physical counter */
37#define ARCH_TIMER_USR_VCT_ACCESS_EN (1 << 1) /* virtual counter */
38#define ARCH_TIMER_VIRT_EVT_EN (1 << 2)
39#define ARCH_TIMER_EVT_TRIGGER_SHIFT (4)
40#define ARCH_TIMER_EVT_TRIGGER_MASK (0xF << ARCH_TIMER_EVT_TRIGGER_SHIFT)
41#define ARCH_TIMER_USR_VT_ACCESS_EN (1 << 8) /* virtual timer registers */
42#define ARCH_TIMER_USR_PT_ACCESS_EN (1 << 9) /* physical timer registers */
43
Will Deacon037f6372013-08-23 15:32:29 +010044#define ARCH_TIMER_EVT_STREAM_FREQ 10000 /* 100us */
45
Mark Rutland8a4da6e2012-11-12 14:33:44 +000046#ifdef CONFIG_ARM_ARCH_TIMER
47
Mark Rutland8a4da6e2012-11-12 14:33:44 +000048extern u32 arch_timer_get_rate(void);
Stephen Boyd22006992013-07-18 16:59:32 -070049extern u64 (*arch_timer_read_counter)(void);
Mark Rutland8a4da6e2012-11-12 14:33:44 +000050extern struct timecounter *arch_timer_get_timecounter(void);
51
52#else
53
Mark Rutland8a4da6e2012-11-12 14:33:44 +000054static inline u32 arch_timer_get_rate(void)
55{
56 return 0;
57}
58
59static inline u64 arch_timer_read_counter(void)
60{
61 return 0;
62}
63
Olof Johansson0582b052013-02-11 15:15:53 -080064static inline struct timecounter *arch_timer_get_timecounter(void)
Mark Rutland8a4da6e2012-11-12 14:33:44 +000065{
66 return NULL;
67}
68
69#endif
70
71#endif