projects / mirror_ubuntu-hirsute-kernel.git / blame
| 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 */ |