Commit | Line | Data |
---|---|---|
6d60b6ee PD |
1 | /* |
2 | * Copyright (C) 2012 Regents of the University of California | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or | |
5 | * modify it under the terms of the GNU General Public License | |
6 | * as published by the Free Software Foundation, version 2. | |
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 | ||
14 | #ifndef _ASM_RISCV_TIMEX_H | |
15 | #define _ASM_RISCV_TIMEX_H | |
16 | ||
17 | #include <asm/param.h> | |
18 | ||
19 | typedef unsigned long cycles_t; | |
20 | ||
4a41d5db | 21 | static inline cycles_t get_cycles_inline(void) |
6d60b6ee PD |
22 | { |
23 | cycles_t n; | |
24 | ||
25 | __asm__ __volatile__ ( | |
26 | "rdtime %0" | |
27 | : "=r" (n)); | |
28 | return n; | |
29 | } | |
4a41d5db | 30 | #define get_cycles get_cycles_inline |
6d60b6ee PD |
31 | |
32 | #ifdef CONFIG_64BIT | |
33 | static inline uint64_t get_cycles64(void) | |
34 | { | |
35 | return get_cycles(); | |
36 | } | |
37 | #else | |
38 | static inline uint64_t get_cycles64(void) | |
39 | { | |
40 | u32 lo, hi, tmp; | |
41 | __asm__ __volatile__ ( | |
42 | "1:\n" | |
43 | "rdtimeh %0\n" | |
44 | "rdtime %1\n" | |
45 | "rdtimeh %2\n" | |
46 | "bne %0, %2, 1b" | |
47 | : "=&r" (hi), "=&r" (lo), "=&r" (tmp)); | |
48 | return ((u64)hi << 32) | lo; | |
49 | } | |
50 | #endif | |
51 | ||
52 | #define ARCH_HAS_READ_CURRENT_TIMER | |
53 | ||
54 | static inline int read_current_timer(unsigned long *timer_val) | |
55 | { | |
56 | *timer_val = get_cycles(); | |
57 | return 0; | |
58 | } | |
59 | ||
60 | #endif /* _ASM_RISCV_TIMEX_H */ |