1 /* 2 * Copyright (c) 2023 Institute of Parallel And Distributed Systems (IPADS), Shanghai Jiao Tong University (SJTU) 3 * Licensed under the Mulan PSL v2. 4 * You can use this software according to the terms and conditions of the Mulan PSL v2. 5 * You may obtain a copy of Mulan PSL v2 at: 6 * http://license.coscl.org.cn/MulanPSL2 7 * THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND, EITHER EXPRESS OR 8 * IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT, MERCHANTABILITY OR FIT FOR A PARTICULAR 9 * PURPOSE. 10 * See the Mulan PSL v2 for more details. 11 */ 12 #ifndef ARCH_AARCH64_ARCH_MACHINE_PMU_H 13 #define ARCH_AARCH64_ARCH_MACHINE_PMU_H 14 15 #include <common/types.h> 16 17 void enable_cpu_cnt(void); 18 void disable_cpu_cnt(void); 19 void pmu_init(void); 20 pmu_read_real_cycle(void)21static inline u64 pmu_read_real_cycle(void) 22 { 23 s64 tv; 24 asm volatile("mrs %0, pmccntr_el0" : "=r"(tv)); 25 return tv; 26 } 27 pmu_clear_cnt(void)28static inline void pmu_clear_cnt(void) 29 { 30 asm volatile("msr pmccntr_el0, %0" ::"r"(0)); 31 } 32 33 #endif /* ARCH_AARCH64_ARCH_MACHINE_PMU_H */