Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
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
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
32#ifdef CONFIG_ARM_ARCH_TIMER
33
34extern int arch_timer_init(void);
35extern u32 arch_timer_get_rate(void);
36extern u64 (*arch_timer_read_counter)(void);
37extern struct timecounter *arch_timer_get_timecounter(void);
38
39#else
40
41static inline int arch_timer_init(void)
42{
43 return -ENXIO;
44}
45
46static inline u32 arch_timer_get_rate(void)
47{
48 return 0;
49}
50
51static inline u64 arch_timer_read_counter(void)
52{
53 return 0;
54}
55
56static inline struct timecounter *arch_timer_get_timecounter(void)
57{
58 return NULL;
59}
60
61#endif
62
63#endif