/* * Copyright (C) 2012 Regents of the University of California * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation, version 2. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. */ #ifndef _ASM_RISCV_TIMEX_H #define _ASM_RISCV_TIMEX_H #include <asm/param.h> typedef unsigned long cycles_t; static inline cycles_t get_cycles_inline(void) { cycles_t n; __asm__ __volatile__ ( "rdtime %0" : "=r" (n)); return n; } #define get_cycles get_cycles_inline #ifdef CONFIG_64BIT static inline uint64_t get_cycles64(void) { return get_cycles(); } #else static inline uint64_t get_cycles64(void) { u32 lo, hi, tmp; __asm__ __volatile__ ( "1:\n" "rdtimeh %0\n" "rdtime %1\n" "rdtimeh %2\n" "bne %0, %2, 1b" : "=&r" (hi), "=&r" (lo), "=&r" (tmp)); return ((u64)hi << 32) | lo; } #endif #define ARCH_HAS_READ_CURRENT_TIMER static inline int read_current_timer(unsigned long *timer_val) { *timer_val = get_cycles(); return 0; } #endif /* _ASM_RISCV_TIMEX_H */