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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 enum 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
38 extern u32 arch_timer_get_rate(void);
39 extern u64 (*arch_timer_read_counter)(void);
40 extern struct timecounter *arch_timer_get_timecounter(void);
41
42 #else
43
44 static inline u32 arch_timer_get_rate(void)
45 {
46         return 0;
47 }
48
49 static inline u64 arch_timer_read_counter(void)
50 {
51         return 0;
52 }
53
54 static inline struct timecounter *arch_timer_get_timecounter(void)
55 {
56         return NULL;
57 }
58
59 #endif
60
61 #endif