Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
1/*
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
26enum arch_timer_reg {
27 ARCH_TIMER_REG_CTRL,
28 ARCH_TIMER_REG_TVAL,
29};
30
31#define ARCH_TIMER_PHYS_ACCESS 0
32#define ARCH_TIMER_VIRT_ACCESS 1
33#define ARCH_TIMER_MEM_PHYS_ACCESS 2
34#define ARCH_TIMER_MEM_VIRT_ACCESS 3
35
36#ifdef CONFIG_ARM_ARCH_TIMER
37
38extern u32 arch_timer_get_rate(void);
39extern u64 (*arch_timer_read_counter)(void);
40extern struct timecounter *arch_timer_get_timecounter(void);
41
42#else
43
44static inline u32 arch_timer_get_rate(void)
45{
46 return 0;
47}
48
49static inline u64 arch_timer_read_counter(void)
50{
51 return 0;
52}
53
54static inline struct timecounter *arch_timer_get_timecounter(void)
55{
56 return NULL;
57}
58
59#endif
60
61#endif